diff options
35 files changed, 847 insertions, 755 deletions
diff --git a/Documentation/sh/new-machine.txt b/Documentation/sh/new-machine.txt index f0354164cb0e..e0961a66130b 100644 --- a/Documentation/sh/new-machine.txt +++ b/Documentation/sh/new-machine.txt @@ -116,7 +116,6 @@ might look something like: * arch/sh/boards/vapor/setup.c - Setup code for imaginary board */ #include <linux/init.h> -#include <asm/rtc.h> /* for board_time_init() */ const char *get_system_type(void) { @@ -132,13 +131,6 @@ int __init platform_setup(void) * this board. */ - /* - * Presume all FooTech boards have the same broken timer, - * and also presume that we've defined foo_timer_init to - * do something useful. - */ - board_time_init = foo_timer_init; - /* Start-up imaginary PCI ... */ /* And whatever else ... */ diff --git a/arch/sh/boards/mach-dreamcast/Makefile b/arch/sh/boards/mach-dreamcast/Makefile index 7b97546c7e5f..62b024bc2a3e 100644 --- a/arch/sh/boards/mach-dreamcast/Makefile +++ b/arch/sh/boards/mach-dreamcast/Makefile @@ -2,5 +2,5 @@ # Makefile for the Sega Dreamcast specific parts of the kernel # -obj-y := setup.o irq.o rtc.o - +obj-y := setup.o irq.o +obj-$(CONFIG_RTC_DRV_GENERIC) += rtc.o diff --git a/arch/sh/boards/mach-dreamcast/rtc.c b/arch/sh/boards/mach-dreamcast/rtc.c index 061d65714fcc..0eb12c45fa59 100644 --- a/arch/sh/boards/mach-dreamcast/rtc.c +++ b/arch/sh/boards/mach-dreamcast/rtc.c @@ -11,8 +11,9 @@ */ #include <linux/time.h> -#include <asm/rtc.h> -#include <asm/io.h> +#include <linux/rtc.h> +#include <linux/io.h> +#include <linux/platform_device.h> /* The AICA RTC has an Epoch of 1/1/1950, so we must subtract 20 years (in seconds) to get the standard Unix Epoch when getting the time, and add @@ -26,13 +27,15 @@ /** * aica_rtc_gettimeofday - Get the time from the AICA RTC - * @ts: pointer to resulting timespec + * @dev: the RTC device (ignored) + * @tm: pointer to resulting RTC time structure * * Grabs the current RTC seconds counter and adjusts it to the Unix Epoch. */ -static void aica_rtc_gettimeofday(struct timespec *ts) +static int aica_rtc_gettimeofday(struct device *dev, struct rtc_time *tm) { unsigned long val1, val2; + time64_t t; do { val1 = ((__raw_readl(AICA_RTC_SECS_H) & 0xffff) << 16) | @@ -42,22 +45,26 @@ static void aica_rtc_gettimeofday(struct timespec *ts) (__raw_readl(AICA_RTC_SECS_L) & 0xffff); } while (val1 != val2); - ts->tv_sec = val1 - TWENTY_YEARS; + /* normalize to 1970..2106 time range */ + t = (u32)(val1 - TWENTY_YEARS); - /* Can't get nanoseconds with just a seconds counter. */ - ts->tv_nsec = 0; + rtc_time64_to_tm(t, tm); + + return 0; } /** * aica_rtc_settimeofday - Set the AICA RTC to the current time - * @secs: contains the time_t to set + * @dev: the RTC device (ignored) + * @tm: pointer to new RTC time structure * * Adjusts the given @tv to the AICA Epoch and sets the RTC seconds counter. */ -static int aica_rtc_settimeofday(const time_t secs) +static int aica_rtc_settimeofday(struct device *dev, struct rtc_time *tm) { unsigned long val1, val2; - unsigned long adj = secs + TWENTY_YEARS; + time64_t secs = rtc_tm_to_time64(tm); + u32 adj = secs + TWENTY_YEARS; do { __raw_writel((adj & 0xffff0000) >> 16, AICA_RTC_SECS_H); @@ -73,9 +80,19 @@ static int aica_rtc_settimeofday(const time_t secs) return 0; } -void aica_time_init(void) +static const struct rtc_class_ops rtc_generic_ops = { + .read_time = aica_rtc_gettimeofday, + .set_time = aica_rtc_settimeofday, +}; + +static int __init aica_time_init(void) { - rtc_sh_get_time = aica_rtc_gettimeofday; - rtc_sh_set_time = aica_rtc_settimeofday; -} + struct platform_device *pdev; + + pdev = platform_device_register_data(NULL, "rtc-generic", -1, + &rtc_generic_ops, + sizeof(rtc_generic_ops)); + return PTR_ERR_OR_ZERO(pdev); +} +arch_initcall(aica_time_init); diff --git a/arch/sh/boards/mach-dreamcast/setup.c b/arch/sh/boards/mach-dreamcast/setup.c index ad1a4db72e04..672c2ad8f8d5 100644 --- a/arch/sh/boards/mach-dreamcast/setup.c +++ b/arch/sh/boards/mach-dreamcast/setup.c @@ -30,7 +30,6 @@ static void __init dreamcast_setup(char **cmdline_p) { - board_time_init = aica_time_init; } static struct sh_machine_vector mv_dreamcast __initmv = { diff --git a/arch/sh/boards/mach-sh03/Makefile b/arch/sh/boards/mach-sh03/Makefile index 400306a796ec..47007a3a2fc8 100644 --- a/arch/sh/boards/mach-sh03/Makefile +++ b/arch/sh/boards/mach-sh03/Makefile @@ -2,4 +2,5 @@ # Makefile for the Interface (CTP/PCI-SH03) specific parts of the kernel # -obj-y := setup.o rtc.o +obj-y := setup.o +obj-$(CONFIG_RTC_DRV_GENERIC) += rtc.o diff --git a/arch/sh/boards/mach-sh03/rtc.c b/arch/sh/boards/mach-sh03/rtc.c index dc3d50e3b7a2..8b23ed7c201c 100644 --- a/arch/sh/boards/mach-sh03/rtc.c +++ b/arch/sh/boards/mach-sh03/rtc.c @@ -13,8 +13,9 @@ #include <linux/bcd.h> #include <linux/rtc.h> #include <linux/spinlock.h> -#include <asm/io.h> -#include <asm/rtc.h> +#include <linux/io.h> +#include <linux/rtc.h> +#include <linux/platform_device.h> #define RTC_BASE 0xb0000000 #define RTC_SEC1 (RTC_BASE + 0) @@ -38,7 +39,7 @@ static DEFINE_SPINLOCK(sh03_rtc_lock); -unsigned long get_cmos_time(void) +static int sh03_rtc_gettimeofday(struct device *dev, struct rtc_time *tm) { unsigned int year, mon, day, hour, min, sec; @@ -75,17 +76,18 @@ unsigned long get_cmos_time(void) } spin_unlock(&sh03_rtc_lock); - return mktime(year, mon, day, hour, min, sec); -} -void sh03_rtc_gettimeofday(struct timespec *tv) -{ + tm->tm_sec = sec; + tm->tm_min = min; + tm->tm_hour = hour; + tm->tm_mday = day; + tm->tm_mon = mon; + tm->tm_year = year - 1900; - tv->tv_sec = get_cmos_time(); - tv->tv_nsec = 0; + return 0; } -static int set_rtc_mmss(unsigned long nowtime) +static int set_rtc_mmss(struct rtc_time *tm) { int retval = 0; int real_seconds, real_minutes, cmos_minutes; @@ -97,8 +99,8 @@ static int set_rtc_mmss(unsigned long nowtime) if (!(__raw_readb(RTC_CTL) & RTC_BUSY)) break; cmos_minutes = (__raw_readb(RTC_MIN1) & 0xf) + (__raw_readb(RTC_MIN10) & 0xf) * 10; - real_seconds = nowtime % 60; - real_minutes = nowtime / 60; + real_seconds = tm->tm_sec; + real_minutes = tm->tm_min; if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1) real_minutes += 30; /* correct for half hour time zone */ real_minutes %= 60; @@ -112,22 +114,31 @@ static int set_rtc_mmss(unsigned long nowtime) printk_once(KERN_NOTICE "set_rtc_mmss: can't update from %d to %d\n", cmos_minutes, real_minutes); - retval = -1; + retval = -EINVAL; } spin_unlock(&sh03_rtc_lock); return retval; } -int sh03_rtc_settimeofday(const time_t secs) +int sh03_rtc_settimeofday(struct device *dev, struct rtc_time *tm) { - unsigned long nowtime = secs; - - return set_rtc_mmss(nowtime); + return set_rtc_mmss(tm); } -void sh03_time_init(void) +static const struct rtc_class_ops rtc_generic_ops = { + .read_time = sh03_rtc_gettimeofday, + .set_time = sh03_rtc_settimeofday, +}; + +static int __init sh03_time_init(void) { - rtc_sh_get_time = sh03_rtc_gettimeofday; - rtc_sh_set_time = sh03_rtc_settimeofday; + struct platform_device *pdev; + + pdev = platform_device_register_data(NULL, "rtc-generic", -1, + &rtc_generic_ops, + sizeof(rtc_generic_ops)); + + return PTR_ERR_OR_ZERO(pdev); } +arch_initcall(sh03_time_init); diff --git a/arch/sh/boards/mach-sh03/setup.c b/arch/sh/boards/mach-sh03/setup.c index 85e7059a77e9..3901b6031ad5 100644 --- a/arch/sh/boards/mach-sh03/setup.c +++ b/arch/sh/boards/mach-sh03/setup.c @@ -22,14 +22,6 @@ static void __init init_sh03_IRQ(void) plat_irq_setup_pins(IRQ_MODE_IRQ); } -/* arch/sh/boards/sh03/rtc.c */ -void sh03_time_init(void); - -static void __init sh03_setup(char **cmdline_p) -{ - board_time_init = sh03_time_init; -} - static struct resource cf_ide_resources[] = { [0] = { .start = 0x1f0, @@ -101,6 +93,5 @@ device_initcall(sh03_devices_setup); static struct sh_machine_vector mv_sh03 __initmv = { .mv_name = "Interface (CTP/PCI-SH03)", - .mv_setup = sh03_setup, .mv_init_irq = init_sh03_IRQ, }; diff --git a/arch/sh/boards/of-generic.c b/arch/sh/boards/of-generic.c index cde370cad4ae..6e9786548ac6 100644 --- a/arch/sh/boards/of-generic.c +++ b/arch/sh/boards/of-generic.c @@ -117,18 +117,10 @@ static void __init sh_of_mem_reserve(void) early_init_fdt_scan_reserved_mem(); } -static void __init sh_of_time_init(void) -{ - pr_info("SH generic board support: scanning for clocksource devices\n"); - timer_probe(); -} - static void __init sh_of_setup(char **cmdline_p) { struct device_node *root; - board_time_init = sh_of_time_init; - sh_mv.mv_name = "Unknown SH model"; root = of_find_node_by_path("/"); if (root) { diff --git a/arch/sh/configs/dreamcast_defconfig b/arch/sh/configs/dreamcast_defconfig index 3f08dc54480b..1d27666c029f 100644 --- a/arch/sh/configs/dreamcast_defconfig +++ b/arch/sh/configs/dreamcast_defconfig @@ -70,3 +70,5 @@ CONFIG_PROC_KCORE=y CONFIG_TMPFS=y CONFIG_HUGETLBFS=y # CONFIG_CRYPTO_ANSI_CPRNG is not set +CONFIG_RTC_CLASS=y +CONFIG_RTC_DRV_GENERIC=y diff --git a/arch/sh/configs/sh03_defconfig b/arch/sh/configs/sh03_defconfig index 2156223405a1..489ffdfb1517 100644 --- a/arch/sh/configs/sh03_defconfig +++ b/arch/sh/configs/sh03_defconfig @@ -130,3 +130,5 @@ CONFIG_CRYPTO_SHA1=y CONFIG_CRYPTO_DEFLATE=y # CONFIG_CRYPTO_ANSI_CPRNG is not set CONFIG_CRC_CCITT=y +CONFIG_RTC_CLASS=y +CONFIG_RTC_DRV_GENERIC=y diff --git a/arch/sh/include/asm/rtc.h b/arch/sh/include/asm/rtc.h index c63555ee1255..69dbae2949b0 100644 --- a/arch/sh/include/asm/rtc.h +++ b/arch/sh/include/asm/rtc.h @@ -3,9 +3,6 @@ #define _ASM_RTC_H void time_init(void); -extern void (*board_time_init)(void); -extern void (*rtc_sh_get_time)(struct timespec *); -extern int (*rtc_sh_set_time)(const time_t); #define RTC_CAP_4_DIGIT_YEAR (1 << 0) diff --git a/arch/sh/include/mach-dreamcast/mach/sysasic.h b/arch/sh/include/mach-dreamcast/mach/sysasic.h index 58f710e1ebc2..59effd1ed3e1 100644 --- a/arch/sh/include/mach-dreamcast/mach/sysasic.h +++ b/arch/sh/include/mach-dreamcast/mach/sysasic.h @@ -42,7 +42,6 @@ /* arch/sh/boards/mach-dreamcast/irq.c */ extern int systemasic_irq_demux(int); extern void systemasic_irq_init(void); -extern void aica_time_init(void); #endif /* __ASM_SH_DREAMCAST_SYSASIC_H */ diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c index fcd5e41977d1..8a1c6c8ab4ec 100644 --- a/arch/sh/kernel/time.c +++ b/arch/sh/kernel/time.c @@ -22,77 +22,6 @@ #include <asm/clock.h> #include <asm/rtc.h> -/* Dummy RTC ops */ -static void null_rtc_get_time(struct timespec *tv) -{ - tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0); - tv->tv_nsec = 0; -} - -static int null_rtc_set_time(const time_t secs) -{ - return 0; -} - -void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time; -int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time; - -void read_persistent_clock(struct timespec *ts) -{ - rtc_sh_get_time(ts); -} - -#ifdef CONFIG_GENERIC_CMOS_UPDATE -int update_persistent_clock(struct timespec now) -{ - return rtc_sh_set_time(now.tv_sec); -} -#endif - -static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm) -{ - struct timespec tv; - - rtc_sh_get_time(&tv); - rtc_time_to_tm(tv.tv_sec, tm); - return 0; -} - -static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm) -{ - unsigned long secs; - - rtc_tm_to_time(tm, &secs); - if ((rtc_sh_set_time == null_rtc_set_time) || - (rtc_sh_set_time(secs) < 0)) - return -EOPNOTSUPP; - - return 0; -} - -static const struct rtc_class_ops rtc_generic_ops = { - .read_time = rtc_generic_get_time, - .set_time = rtc_generic_set_time, -}; - -static int __init rtc_generic_init(void) -{ - struct platform_device *pdev; - - if (rtc_sh_get_time == null_rtc_get_time) - return -ENODEV; - - pdev = platform_device_register_data(NULL, "rtc-generic", -1, - &rtc_generic_ops, - sizeof(rtc_generic_ops)); - - - return PTR_ERR_OR_ZERO(pdev); -} -device_initcall(rtc_generic_init); - -void (*board_time_init)(void); - static void __init sh_late_time_init(void) { /* @@ -110,8 +39,7 @@ static void __init sh_late_time_init(void) void __init time_init(void) { - if (board_time_init) - board_time_init(); + timer_probe(); clk_init(); diff --git a/fs/aio.c b/fs/aio.c index aac9659381d2..76f72509f8c5 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -2065,11 +2065,13 @@ static long do_io_getevents(aio_context_t ctx_id, * specifies an infinite timeout. Note that the timeout pointed to by * timeout is relative. Will fail with -ENOSYS if not implemented. */ +#if !defined(CONFIG_64BIT_TIME) || defined(CONFIG_64BIT) + SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id, long, min_nr, long, nr, struct io_event __user *, events, - struct timespec __user *, timeout) + struct __kernel_timespec __user *, timeout) { struct timespec64 ts; int ret; @@ -2083,6 +2085,8 @@ SYSCALL_DEFINE5(io_getevents, aio_context_t, ctx_id, return ret; } +#endif + struct __aio_sigset { const sigset_t __user *sigmask; size_t sigsetsize; @@ -2093,7 +2097,7 @@ SYSCALL_DEFINE6(io_pgetevents, long, min_nr, long, nr, struct io_event __user *, events, - struct timespec __user *, timeout, + struct __kernel_timespec __user *, timeout, const struct __aio_sigset __user *, usig) { struct __aio_sigset ksig = { NULL, }; @@ -2107,33 +2111,56 @@ SYSCALL_DEFINE6(io_pgetevents, if (usig && copy_from_user(&ksig, usig, sizeof(ksig))) return -EFAULT; - if (ksig.sigmask) { - if (ksig.sigsetsize != sizeof(sigset_t)) - return -EINVAL; - if (copy_from_user(&ksigmask, ksig.sigmask, sizeof(ksigmask))) - return -EFAULT; - sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); - sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); - } + ret = set_user_sigmask(ksig.sigmask, &ksigmask, &sigsaved, ksig.sigsetsize); + if (ret) + return ret; ret = do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &ts : NULL); - if (signal_pending(current)) { - if (ksig.sigmask) { - current->saved_sigmask = sigsaved; - set_restore_sigmask(); - } + restore_user_sigmask(ksig.sigmask, &sigsaved); + if (signal_pending(current) && !ret) + ret = -ERESTARTNOHAND; - if (!ret) - ret = -ERESTARTNOHAND; - } else { - if (ksig.sigmask) - sigprocmask(SIG_SETMASK, &sigsaved, NULL); - } + return ret; +} + +#if defined(CONFIG_COMPAT_32BIT_TIME) && !defined(CONFIG_64BIT) + +SYSCALL_DEFINE6(io_pgetevents_time32, + aio_context_t, ctx_id, + long, min_nr, + long, nr, + struct io_event __user *, events, + struct old_timespec32 __user *, timeout, + const struct __aio_sigset __user *, usig) +{ + struct __aio_sigset ksig = { NULL, }; + sigset_t ksigmask, sigsaved; + struct timespec64 ts; + int ret; + + if (timeout && unlikely(get_old_timespec32(&ts, timeout))) + return -EFAULT; + + if (usig && copy_from_user(&ksig, usig, sizeof(ksig))) + return -EFAULT; + + + ret = set_user_sigmask(ksig.sigmask, &ksigmask, &sigsaved, ksig.sigsetsize); + if (ret) + return ret; + + ret = do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &ts : NULL); + restore_user_sigmask(ksig.sigmask, &sigsaved); + if (signal_pending(current) && !ret) + ret = -ERESTARTNOHAND; return ret; } -#ifdef CONFIG_COMPAT +#endif + +#if defined(CONFIG_COMPAT_32BIT_TIME) + COMPAT_SYSCALL_DEFINE5(io_getevents, compat_aio_context_t, ctx_id, compat_long_t, min_nr, compat_long_t, nr, @@ -2152,12 +2179,17 @@ COMPAT_SYSCALL_DEFINE5(io_getevents, compat_aio_context_t, ctx_id, return ret; } +#endif + +#ifdef CONFIG_COMPAT struct __compat_aio_sigset { compat_sigset_t __user *sigmask; compat_size_t sigsetsize; }; +#if defined(CONFIG_COMPAT_32BIT_TIME) + COMPAT_SYSCALL_DEFINE6(io_pgetevents, compat_aio_context_t, ctx_id, compat_long_t, min_nr, @@ -2177,27 +2209,47 @@ COMPAT_SYSCALL_DEFINE6(io_pgetevents, if (usig && copy_from_user(&ksig, usig, sizeof(ksig))) return -EFAULT; - if (ksig.sigmask) { - if (ksig.sigsetsize != sizeof(compat_sigset_t)) - return -EINVAL; - if (get_compat_sigset(&ksigmask, ksig.sigmask)) - return -EFAULT; - sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); - sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); - } + ret = set_compat_user_sigmask(ksig.sigmask, &ksigmask, &sigsaved, ksig.sigsetsize); + if (ret) + return ret; ret = do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &t : NULL); - if (signal_pending(current)) { - if (ksig.sigmask) { - current->saved_sigmask = sigsaved; - set_restore_sigmask(); - } - if (!ret) - ret = -ERESTARTNOHAND; - } else { - if (ksig.sigmask) - sigprocmask(SIG_SETMASK, &sigsaved, NULL); - } + restore_user_sigmask(ksig.sigmask, &sigsaved); + if (signal_pending(current) && !ret) + ret = -ERESTARTNOHAND; + + return ret; +} + +#endif + +COMPAT_SYSCALL_DEFINE6(io_pgetevents_time64, + compat_aio_context_t, ctx_id, + compat_long_t, min_nr, + compat_long_t, nr, + struct io_event __user *, events, + struct __kernel_timespec __user *, timeout, + const struct __compat_aio_sigset __user *, usig) +{ + struct __compat_aio_sigset ksig = { NULL, }; + sigset_t ksigmask, sigsaved; + struct timespec64 t; + int ret; + + if (timeout && get_timespec64(&t, timeout)) + return -EFAULT; + + if (usig && copy_from_user(&ksig, usig, sizeof(ksig))) + return -EFAULT; + + ret = set_compat_user_sigmask(ksig.sigmask, &ksigmask, &sigsaved, ksig.sigsetsize); + if (ret) + return ret; + + ret = do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &t : NULL); + restore_user_sigmask(ksig.sigmask, &sigsaved); + if (signal_pending(current) && !ret) + ret = -ERESTARTNOHAND; return ret; } diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 42bbe6824b4b..8a5a1010886b 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -2223,31 +2223,13 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events, * If the caller wants a certain signal mask to be set during the wait, * we apply it here. */ - if (sigmask) { - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; - if (copy_from_user(&ksigmask, sigmask, sizeof(ksigmask))) - return -EFAULT; - sigsaved = current->blocked; - set_current_blocked(&ksigmask); - } + error = set_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + if (error) + return error; error = do_epoll_wait(epfd, events, maxevents, timeout); - /* - * If we changed the signal mask, we need to restore the original one. - * In case we've got a signal while waiting, we do not restore the - * signal mask yet, and we allow do_signal() to deliver the signal on - * the way back to userspace, before the signal mask is restored. - */ - if (sigmask) { - if (error == -EINTR) { - memcpy(¤t->saved_sigmask, &sigsaved, - sizeof(sigsaved)); - set_restore_sigmask(); - } else - set_current_blocked(&sigsaved); - } + restore_user_sigmask(sigmask, &sigsaved); return error; } @@ -2266,31 +2248,13 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd, * If the caller wants a certain signal mask to be set during the wait, * we apply it here. */ - if (sigmask) { - if (sigsetsize != sizeof(compat_sigset_t)) - return -EINVAL; - if (get_compat_sigset(&ksigmask, sigmask)) - return -EFAULT; - sigsaved = current->blocked; - set_current_blocked(&ksigmask); - } + err = set_compat_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + if (err) + return err; err = do_epoll_wait(epfd, events, maxevents, timeout); - /* - * If we changed the signal mask, we need to restore the original one. - * In case we've got a signal while waiting, we do not restore the - * signal mask yet, and we allow do_signal() to deliver the signal on - * the way back to userspace, before the signal mask is restored. - */ - if (sigmask) { - if (err == -EINTR) { - memcpy(¤t->saved_sigmask, &sigsaved, - sizeof(sigsaved)); - set_restore_sigmask(); - } else - set_current_blocked(&sigsaved); - } + restore_user_sigmask(sigmask, &sigsaved); return err; } diff --git a/fs/inode.c b/fs/inode.c index 35d2108d567c..0cd47fe0dbe5 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -2149,7 +2149,9 @@ EXPORT_SYMBOL(timespec64_trunc); */ struct timespec64 current_time(struct inode *inode) { - struct timespec64 now = current_kernel_time64(); + struct timespec64 now; + + ktime_get_coarse_real_ts64(&now); if (unlikely(!inode->i_sb)) { WARN(1, "current_time() called with uninitialized super_block in the inode"); diff --git a/fs/select.c b/fs/select.c index 22b3bf89f051..4c8652390c94 100644 --- a/fs/select.c +++ b/fs/select.c @@ -287,12 +287,18 @@ int poll_select_set_timeout(struct timespec64 *to, time64_t sec, long nsec) return 0; } +enum poll_time_type { + PT_TIMEVAL = 0, + PT_OLD_TIMEVAL = 1, + PT_TIMESPEC = 2, + PT_OLD_TIMESPEC = 3, +}; + static int poll_select_copy_remaining(struct timespec64 *end_time, void __user *p, - int timeval, int ret) + enum poll_time_type pt_type, int ret) { struct timespec64 rts; - struct timeval rtv; if (!p) return ret; @@ -310,18 +316,40 @@ static int poll_select_copy_remaining(struct timespec64 *end_time, rts.tv_sec = rts.tv_nsec = 0; - if (timeval) { - if (sizeof(rtv) > sizeof(rtv.tv_sec) + sizeof(rtv.tv_usec)) - memset(&rtv, 0, sizeof(rtv)); - rtv.tv_sec = rts.tv_sec; - rtv.tv_usec = rts.tv_nsec / NSEC_PER_USEC; + switch (pt_type) { + case PT_TIMEVAL: + { + struct timeval rtv; - if (!copy_to_user(p, &rtv, sizeof(rtv))) + if (sizeof(rtv) > sizeof(rtv.tv_sec) + sizeof(rtv.tv_usec)) + memset(&rtv, 0, sizeof(rtv)); + rtv.tv_sec = rts.tv_sec; + rtv.tv_usec = rts.tv_nsec / NSEC_PER_USEC; + if (!copy_to_user(p, &rtv, sizeof(rtv))) + return ret; + } + break; + case PT_OLD_TIMEVAL: + { + struct old_timeval32 rtv; + + rtv.tv_sec = rts.tv_sec; + rtv.tv_usec = rts.tv_nsec / NSEC_PER_USEC; + if (!copy_to_user(p, &rtv, sizeof(rtv))) + return ret; + } + break; + case PT_TIMESPEC: + if (!put_timespec64(&rts, p)) return ret; - - } else if (!put_timespec64(&rts, p)) - return ret; - + break; + case PT_OLD_TIMESPEC: + if (!put_old_timespec32(&rts, p)) + return ret; + break; + default: + BUG(); + } /* * If an application puts its timeval in read-only memory, we * don't want the Linux-specific update to the timeval to @@ -689,7 +717,7 @@ static int kern_select(int n, fd_set __user *inp, fd_set __user *outp, } ret = core_sys_select(n, inp, outp, exp, to); - ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); + ret = poll_select_copy_remaining(&end_time, tvp, PT_TIMEVAL, ret); return ret; } @@ -701,49 +729,41 @@ SYSCALL_DEFINE5(select, int, n, fd_set __user *, inp, fd_set __user *, outp, } static long do_pselect(int n, fd_set __user *inp, fd_set __user *outp, - fd_set __user *exp, struct timespec __user *tsp, - const sigset_t __user *sigmask, size_t sigsetsize) + fd_set __user *exp, void __user *tsp, + const sigset_t __user *sigmask, size_t sigsetsize, + enum poll_time_type type) { sigset_t ksigmask, sigsaved; struct timespec64 ts, end_time, *to = NULL; int ret; if (tsp) { - if (get_timespec64(&ts, tsp)) - return -EFAULT; + switch (type) { + case PT_TIMESPEC: + if (get_timespec64(&ts, tsp)) + return -EFAULT; + break; + case PT_OLD_TIMESPEC: + if (get_old_timespec32(&ts, tsp)) + return -EFAULT; + break; + default: + BUG(); + } to = &end_time; if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) return -EINVAL; } - if (sigmask) { - /* XXX: Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; - if (copy_from_user(&ksigmask, sigmask, sizeof(ksigmask))) - return -EFAULT; - - sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); - sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); - } + ret = set_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + if (ret) + return ret; ret = core_sys_select(n, inp, outp, exp, to); - ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); + ret = poll_select_copy_remaining(&end_time, tsp, type, ret); - if (ret == -ERESTARTNOHAND) { - /* - * Don't restore the signal mask yet. Let do_signal() deliver - * the signal on the way back to userspace, before the signal - * mask is restored. - */ - if (sigmask) { - memcpy(¤t->saved_sigmask, &sigsaved, - sizeof(sigsaved)); - set_restore_sigmask(); - } - } else if (sigmask) - sigprocmask(SIG_SETMASK, &sigsaved, NULL); + restore_user_sigmask(sigmask, &sigsaved); return ret; } @@ -755,7 +775,7 @@ static long do_pselect(int n, fd_set __user *inp, fd_set __user *outp, * the sigset size. */ SYSCALL_DEFINE6(pselect6, int, n, fd_set __user *, inp, fd_set __user *, outp, - fd_set __user *, exp, struct timespec __user *, tsp, + fd_set __user *, exp, struct __kernel_timespec __user *, tsp, void __user *, sig) { size_t sigsetsize = 0; @@ -769,9 +789,31 @@ SYSCALL_DEFINE6(pselect6, int, n, fd_set __user *, inp, fd_set __user *, outp, return -EFAULT; } - return do_pselect(n, inp, outp, exp, tsp, up, sigsetsize); + return do_pselect(n, inp, outp, exp, tsp, up, sigsetsize, PT_TIMESPEC); } +#if defined(CONFIG_COMPAT_32BIT_TIME) && !defined(CONFIG_64BIT) + +SYSCALL_DEFINE6(pselect6_time32, int, n, fd_set __user *, inp, fd_set __user *, outp, + fd_set __user *, exp, struct old_timespec32 __user *, tsp, + void __user *, sig) +{ + size_t sigsetsize = 0; + sigset_t __user *up = NULL; + + if (sig) { + if (!access_ok(VERIFY_READ, sig, sizeof(void *)+sizeof(size_t)) + || __get_user(up, (sigset_t __user * __user *)sig) + || __get_user(sigsetsize, + (size_t __user *)(sig+sizeof(void *)))) + return -EFAULT; + } + + return do_pselect(n, inp, outp, exp, tsp, up, sigsetsize, PT_OLD_TIMESPEC); +} + +#endif + #ifdef __ARCH_WANT_SYS_OLD_SELECT struct sel_arg_struct { unsigned long n; @@ -1045,7 +1087,7 @@ SYSCALL_DEFINE3(poll, struct pollfd __user *, ufds, unsigned int, nfds, } SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, unsigned int, nfds, - struct timespec __user *, tsp, const sigset_t __user *, sigmask, + struct __kernel_timespec __user *, tsp, const sigset_t __user *, sigmask, size_t, sigsetsize) { sigset_t ksigmask, sigsaved; @@ -1061,89 +1103,62 @@ SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, unsigned int, nfds, return -EINVAL; } - if (sigmask) { - /* XXX: Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; - if (copy_from_user(&ksigmask, sigmask, sizeof(ksigmask))) - return -EFAULT; - - sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); - sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); - } + ret = set_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + if (ret) + return ret; ret = do_sys_poll(ufds, nfds, to); + restore_user_sigmask(sigmask, &sigsaved); + /* We can restart this syscall, usually */ - if (ret == -EINTR) { - /* - * Don't restore the signal mask yet. Let do_signal() deliver - * the signal on the way back to userspace, before the signal - * mask is restored. - */ - if (sigmask) { - memcpy(¤t->saved_sigmask, &sigsaved, - sizeof(sigsaved)); - set_restore_sigmask(); - } + if (ret == -EINTR) ret = -ERESTARTNOHAND; - } else if (sigmask) - sigprocmask(SIG_SETMASK, &sigsaved, NULL); - ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); + ret = poll_select_copy_remaining(&end_time, tsp, PT_TIMESPEC, ret); return ret; } -#ifdef CONFIG_COMPAT -#define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) +#if defined(CONFIG_COMPAT_32BIT_TIME) && !defined(CONFIG_64BIT) -static -int compat_poll_select_copy_remaining(struct timespec64 *end_time, void __user *p, - int timeval, int ret) +SYSCALL_DEFINE5(ppoll_time32, struct pollfd __user *, ufds, unsigned int, nfds, + struct old_timespec32 __user *, tsp, const sigset_t __user *, sigmask, + size_t, sigsetsize) { - struct timespec64 ts; + sigset_t ksigmask, sigsaved; + struct timespec64 ts, end_time, *to = NULL; + int ret; - if (!p) - return ret; + if (tsp) { + if (get_old_timespec32(&ts, tsp)) + return -EFAULT; - if (current->personality & STICKY_TIMEOUTS) - goto sticky; + to = &end_time; + if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) + return -EINVAL; + } - /* No update for zero timeout */ - if (!end_time->tv_sec && !end_time->tv_nsec) + ret = set_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + if (ret) return ret; - ktime_get_ts64(&ts); - ts = timespec64_sub(*end_time, ts); - if (ts.tv_sec < 0) - ts.tv_sec = ts.tv_nsec = 0; + ret = do_sys_poll(ufds, nfds, to); - if (timeval) { - struct old_timeval32 rtv; + restore_user_sigmask(sigmask, &sigsaved); - rtv.tv_sec = ts.tv_sec; - rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; + /* We can restart this syscall, usually */ + if (ret == -EINTR) + ret = -ERESTARTNOHAND; - if (!copy_to_user(p, &rtv, sizeof(rtv))) - return ret; - } else { - if (!put_old_timespec32(&ts, p)) - return ret; - } - /* - * If an application puts its timeval in read-only memory, we - * don't want the Linux-specific update to the timeval to - * cause a fault after the select has completed - * successfully. However, because we're not updating the - * timeval, we can't restart the system call. - */ + ret = poll_select_copy_remaining(&end_time, tsp, PT_OLD_TIMESPEC, ret); -sticky: - if (ret == -ERESTARTNOHAND) - ret = -EINTR; return ret; } +#endif + +#ifdef CONFIG_COMPAT +#define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) /* * Ooo, nasty. We need here to frob 32-bit unsigned longs to @@ -1275,7 +1290,7 @@ static int do_compat_select(int n, compat_ulong_t __user *inp, } ret = compat_core_sys_select(n, inp, outp, exp, to); - ret = compat_poll_select_copy_remaining(&end_time, tvp, 1, ret); + ret = poll_select_copy_remaining(&end_time, tvp, PT_OLD_TIMEVAL, ret); return ret; } @@ -1307,52 +1322,66 @@ COMPAT_SYSCALL_DEFINE1(old_select, struct compat_sel_arg_struct __user *, arg) static long do_compat_pselect(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp, compat_ulong_t __user *exp, - struct old_timespec32 __user *tsp, compat_sigset_t __user *sigmask, - compat_size_t sigsetsize) + void __user *tsp, compat_sigset_t __user *sigmask, + compat_size_t sigsetsize, enum poll_time_type type) { sigset_t ksigmask, sigsaved; struct timespec64 ts, end_time, *to = NULL; int ret; if (tsp) { - if (get_old_timespec32(&ts, tsp)) - return -EFAULT; + switch (type) { + case PT_OLD_TIMESPEC: + if (get_old_timespec32(&ts, tsp)) + return -EFAULT; + break; + case PT_TIMESPEC: + if (get_timespec64(&ts, tsp)) + return -EFAULT; + break; + default: + BUG(); + } to = &end_time; if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) return -EINVAL; } - if (sigmask) { - if (sigsetsize != sizeof(compat_sigset_t)) - return -EINVAL; - if (get_compat_sigset(&ksigmask, sigmask)) - return -EFAULT; - - sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); - sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); - } + ret = set_compat_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + if (ret) + return ret; ret = compat_core_sys_select(n, inp, outp, exp, to); - ret = compat_poll_select_copy_remaining(&end_time, tsp, 0, ret); + ret = poll_select_copy_remaining(&end_time, tsp, type, ret); - if (ret == -ERESTARTNOHAND) { - /* - * Don't restore the signal mask yet. Let do_signal() deliver - * the signal on the way back to userspace, before the signal - * mask is restored. - */ - if (sigmask) { - memcpy(¤t->saved_sigmask, &sigsaved, - sizeof(sigsaved)); - set_restore_sigmask(); - } - } else if (sigmask) - sigprocmask(SIG_SETMASK, &sigsaved, NULL); + restore_user_sigmask(sigmask, &sigsaved); return ret; } +COMPAT_SYSCALL_DEFINE6(pselect6_time64, int, n, compat_ulong_t __user *, inp, + compat_ulong_t __user *, outp, compat_ulong_t __user *, exp, + struct __kernel_timespec __user *, tsp, void __user *, sig) +{ + compat_size_t sigsetsize = 0; + compat_uptr_t up = 0; + + if (sig) { + if (!access_ok(VERIFY_READ, sig, + sizeof(compat_uptr_t)+sizeof(compat_size_t)) || + __get_user(up, (compat_uptr_t __user *)sig) || + __get_user(sigsetsize, + (compat_size_t __user *)(sig+sizeof(up)))) + return -EFAULT; + } + + return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), + sigsetsize, PT_TIMESPEC); +} + +#if defined(CONFIG_COMPAT_32BIT_TIME) + COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp, compat_ulong_t __user *, outp, compat_ulong_t __user *, exp, struct old_timespec32 __user *, tsp, void __user *, sig) @@ -1368,10 +1397,14 @@ COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp, (compat_size_t __user *)(sig+sizeof(up)))) return -EFAULT; } + return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), - sigsetsize); + sigsetsize, PT_OLD_TIMESPEC); } +#endif + +#if defined(CONFIG_COMPAT_32BIT_TIME) COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, unsigned int, nfds, struct old_timespec32 __user *, tsp, const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize) @@ -1389,36 +1422,57 @@ COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, return -EINVAL; } - if (sigmask) { - if (sigsetsize != sizeof(compat_sigset_t)) - return -EINVAL; - if (get_compat_sigset(&ksigmask, sigmask)) + ret = set_compat_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + if (ret) + return ret; + + ret = do_sys_poll(ufds, nfds, to); + + restore_user_sigmask(sigmask, &sigsaved); + + /* We can restart this syscall, usually */ + if (ret == -EINTR) + ret = -ERESTARTNOHAND; + + ret = poll_select_copy_remaining(&end_time, tsp, PT_OLD_TIMESPEC, ret); + + return ret; +} +#endif + +/* New compat syscall for 64 bit time_t*/ +COMPAT_SYSCALL_DEFINE5(ppoll_time64, struct pollfd __user *, ufds, + unsigned int, nfds, struct __kernel_timespec __user *, tsp, + const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize) +{ + sigset_t ksigmask, sigsaved; + struct timespec64 ts, end_time, *to = NULL; + int ret; + + if (tsp) { + if (get_timespec64(&ts, tsp)) return -EFAULT; - sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); - sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); + to = &end_time; + if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) + return -EINVAL; } + ret = set_compat_user_sigmask(sigmask, &ksigmask, &sigsaved, sigsetsize); + if (ret) + return ret; + ret = do_sys_poll(ufds, nfds, to); + restore_user_sigmask(sigmask, &sigsaved); + /* We can restart this syscall, usually */ - if (ret == -EINTR) { - /* - * Don't restore the signal mask yet. Let do_signal() deliver - * the signal on the way back to userspace, before the signal - * mask is restored. - */ - if (sigmask) { - memcpy(¤t->saved_sigmask, &sigsaved, - sizeof(sigsaved)); - set_restore_sigmask(); - } + if (ret == -EINTR) ret = -ERESTARTNOHAND; - } else if (sigmask) - sigprocmask(SIG_SETMASK, &sigsaved, NULL); - ret = compat_poll_select_copy_remaining(&end_time, tsp, 0, ret); + ret = poll_select_copy_remaining(&end_time, tsp, PT_TIMESPEC, ret); return ret; } + #endif diff --git a/include/linux/compat.h b/include/linux/compat.h index 88720b443cd6..056be0d03722 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -169,6 +169,10 @@ typedef struct { compat_sigset_word sig[_COMPAT_NSIG_WORDS]; } compat_sigset_t; +int set_compat_user_sigmask(const compat_sigset_t __user *usigmask, + sigset_t *set, sigset_t *oldset, + size_t sigsetsize); + struct compat_sigaction { #ifndef __ARCH_HAS_IRIX_SIGACTION compat_uptr_t sa_handler; @@ -558,6 +562,12 @@ asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id, struct io_event __user *events, struct old_timespec32 __user *timeout, const struct __compat_aio_sigset __user *usig); +asmlinkage long compat_sys_io_pgetevents_time64(compat_aio_context_t ctx_id, + compat_long_t min_nr, + compat_long_t nr, + struct io_event __user *events, + struct __kernel_timespec __user *timeout, + const struct __compat_aio_sigset __user *usig); /* fs/cookies.c */ asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t); @@ -643,11 +653,21 @@ asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, compat_ulong_t __user *exp, struct old_timespec32 __user *tsp, void __user *sig); +asmlinkage long compat_sys_pselect6_time64(int n, compat_ulong_t __user *inp, + compat_ulong_t __user *outp, + compat_ulong_t __user *exp, + struct __kernel_timespec __user *tsp, + void __user *sig); asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, unsigned int nfds, struct old_timespec32 __user *tsp, const compat_sigset_t __user *sigmask, compat_size_t sigsetsize); +asmlinkage long compat_sys_ppoll_time64(struct pollfd __user *ufds, + unsigned int nfds, + struct __kernel_timespec __user *tsp, + const compat_sigset_t __user *sigmask, + compat_size_t sigsetsize); /* fs/signalfd.c */ asmlinkage long compat_sys_signalfd4(int ufd, @@ -768,6 +788,9 @@ asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset, asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese, struct compat_siginfo __user *uinfo, struct old_timespec32 __user *uts, compat_size_t sigsetsize); +asmlinkage long compat_sys_rt_sigtimedwait_time64(compat_sigset_t __user *uthese, + struct compat_siginfo __user *uinfo, + struct __kernel_timespec __user *uts, compat_size_t sigsetsize); asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig, struct compat_siginfo __user *uinfo); /* No generic prototype for rt_sigreturn */ @@ -873,6 +896,9 @@ asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages, asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, struct compat_siginfo __user *uinfo); +asmlinkage long compat_sys_recvmmsg_time64(int fd, struct compat_mmsghdr __user *mmsg, + unsigned vlen, unsigned int flags, + struct __kernel_timespec __user *timeout); asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, unsigned vlen, unsigned int flags, struct old_timespec32 __user *timeout); diff --git a/include/linux/futex.h b/include/linux/futex.h index 821ae502d3d8..ccaef0097785 100644 --- a/include/linux/futex.h +++ b/include/linux/futex.h @@ -9,9 +9,6 @@ struct inode; struct mm_struct; struct task_struct; -extern int -handle_futex_death(u32 __user *uaddr, struct task_struct *curr, int pi); - /* * Futexes are matched on equal values of this key. * The key type depends on whether it's a shared or private mapping. @@ -55,11 +52,6 @@ extern void exit_robust_list(struct task_struct *curr); long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, u32 __user *uaddr2, u32 val2, u32 val3); -#ifdef CONFIG_HAVE_FUTEX_CMPXCHG -#define futex_cmpxchg_enabled 1 -#else -extern int futex_cmpxchg_enabled; -#endif #else static inline void exit_robust_list(struct task_struct *curr) { diff --git a/include/linux/signal.h b/include/linux/signal.h index f428e86f4800..cc7e2c1cd444 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -273,6 +273,10 @@ extern int group_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p, enum pid_type type); extern int __group_send_sig_info(int, struct kernel_siginfo *, struct task_struct *); extern int sigprocmask(int, sigset_t *, sigset_t *); +extern int set_user_sigmask(const sigset_t __user *usigmask, sigset_t *set, + sigset_t *oldset, size_t sigsetsize); +extern void restore_user_sigmask(const void __user *usigmask, + sigset_t *sigsaved); extern void set_current_blocked(sigset_t *); extern void __set_current_blocked(const sigset_t *); extern int show_unhandled_signals; diff --git a/include/linux/socket.h b/include/linux/socket.h index 84c48a3c0227..ab2041a00e01 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -349,7 +349,8 @@ struct ucred { extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr); extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); -struct timespec64; +struct __kernel_timespec; +struct old_timespec32; /* The __sys_...msg variants allow MSG_CMSG_COMPAT iff * forbid_cmsg_compat==false @@ -358,8 +359,10 @@ extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, bool forbid_cmsg_compat); extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, bool forbid_cmsg_compat); -extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, - unsigned int flags, struct timespec64 *timeout); +extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, + unsigned int vlen, unsigned int flags, + struct __kernel_timespec __user *timeout, + struct old_timespec32 __user *timeout32); extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, unsigned int flags, bool forbid_cmsg_compat); diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index 2ac3d13a915b..251979d2e709 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -296,12 +296,18 @@ asmlinkage long sys_io_getevents(aio_context_t ctx_id, long min_nr, long nr, struct io_event __user *events, - struct timespec __user *timeout); + struct __kernel_timespec __user *timeout); asmlinkage long sys_io_pgetevents(aio_context_t ctx_id, long min_nr, long nr, struct io_event __user *events, - struct timespec __user *timeout, + struct __kernel_timespec __user *timeout, + const struct __aio_sigset *sig); +asmlinkage long sys_io_pgetevents_time32(aio_context_t ctx_id, + long min_nr, + long nr, + struct io_event __user *events, + struct old_timespec32 __user *timeout, const struct __aio_sigset *sig); /* fs/xattr.c */ @@ -466,10 +472,16 @@ asmlinkage long sys_sendfile64(int out_fd, int in_fd, /* fs/select.c */ asmlinkage long sys_pselect6(int, fd_set __user *, fd_set __user *, - fd_set __user *, struct timespec __user *, + fd_set __user *, struct __kernel_timespec __user *, + void __user *); +asmlinkage long sys_pselect6_time32(int, fd_set __user *, fd_set __user *, + fd_set __user *, struct old_timespec32 __user *, void __user *); asmlinkage long sys_ppoll(struct pollfd __user *, unsigned int, - struct timespec __user *, const sigset_t __user *, + struct __kernel_timespec __user *, const sigset_t __user *, + size_t); +asmlinkage long sys_ppoll_time32(struct pollfd __user *, unsigned int, + struct old_timespec32 __user *, const sigset_t __user *, size_t); /* fs/signalfd.c */ @@ -541,7 +553,7 @@ asmlinkage long sys_unshare(unsigned long unshare_flags); /* kernel/futex.c */ asmlinkage long sys_futex(u32 __user *uaddr, int op, u32 val, - struct timespec __user *utime, u32 __user *uaddr2, + struct __kernel_timespec __user *utime, u32 __user *uaddr2, u32 val3); asmlinkage long sys_get_robust_list(int pid, struct robust_list_head __user * __user *head_ptr, @@ -637,6 +649,10 @@ asmlinkage long sys_rt_sigtimedwait(const sigset_t __user *uthese, siginfo_t __user *uinfo, const struct __kernel_timespec __user *uts, size_t sigsetsize); +asmlinkage long sys_rt_sigtimedwait_time32(const sigset_t __user *uthese, + siginfo_t __user *uinfo, + const struct old_timespec32 __user *uts, + size_t sigsetsize); asmlinkage long sys_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t __user *uinfo); /* kernel/sys.c */ @@ -831,6 +847,9 @@ asmlinkage long sys_accept4(int, struct sockaddr __user *, int __user *, int); asmlinkage long sys_recvmmsg(int fd, struct mmsghdr __user *msg, unsigned int vlen, unsigned flags, struct __kernel_timespec __user *timeout); +asmlinkage long sys_recvmmsg_time32(int fd, struct mmsghdr __user *msg, + unsigned int vlen, unsigned flags, + struct old_timespec32 __user *timeout); asmlinkage long sys_wait4(pid_t pid, int __user *stat_addr, int options, struct rusage __user *ru); diff --git a/include/linux/time32.h b/include/linux/time32.h index 61904a6c098f..118b9977080c 100644 --- a/include/linux/time32.h +++ b/include/linux/time32.h @@ -96,31 +96,6 @@ static inline int timespec_compare(const struct timespec *lhs, const struct time return lhs->tv_nsec - rhs->tv_nsec; } -extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec); - -static inline struct timespec timespec_add(struct timespec lhs, - struct timespec rhs) -{ - struct timespec ts_delta; - - set_normalized_timespec(&ts_delta, lhs.tv_sec + rhs.tv_sec, - lhs.tv_nsec + rhs.tv_nsec); - return ts_delta; -} - -/* - * sub = lhs - rhs, in normalized form - */ -static inline struct timespec timespec_sub(struct timespec lhs, - struct timespec rhs) -{ - struct timespec ts_delta; - - set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec, - lhs.tv_nsec - rhs.tv_nsec); - return ts_delta; -} - /* * Returns true if the timespec is norm, false if denorm: */ diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 29975e93fcb8..a8ab0f143ac4 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -262,18 +262,4 @@ void read_persistent_wall_and_boot_offset(struct timespec64 *wall_clock, struct timespec64 *boot_offset); extern int update_persistent_clock64(struct timespec64 now); -/* - * deprecated aliases, don't use in new code - */ -#define getnstimeofday64(ts) ktime_get_real_ts64(ts) - -static inline struct timespec64 current_kernel_time64(void) -{ - struct timespec64 ts; - - ktime_get_coarse_real_ts64(&ts); - - return ts; -} - #endif diff --git a/include/linux/timekeeping32.h b/include/linux/timekeeping32.h index a502616f7e1c..cc59cc9e0e84 100644 --- a/include/linux/timekeeping32.h +++ b/include/linux/timekeeping32.h @@ -6,15 +6,6 @@ * over time so we can remove the file here. */ -static inline void do_gettimeofday(struct timeval *tv) -{ - struct timespec64 now; - - ktime_get_real_ts64(&now); - tv->tv_sec = now.tv_sec; - tv->tv_usec = now.tv_nsec/1000; -} - static inline unsigned long get_seconds(void) { return ktime_get_real_seconds(); @@ -52,10 +43,4 @@ static inline void getboottime(struct timespec *ts) *ts = timespec64_to_timespec(ts64); } -/* - * Persistent clock related interfaces - */ -extern void read_persistent_clock(struct timespec *ts); -extern int update_persistent_clock(struct timespec now); - #endif diff --git a/kernel/Makefile b/kernel/Makefile index 9dc7f519129d..cde93d54c571 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -49,9 +49,6 @@ obj-$(CONFIG_PROFILING) += profile.o obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-y += time/ obj-$(CONFIG_FUTEX) += futex.o -ifeq ($(CONFIG_COMPAT),y) -obj-$(CONFIG_FUTEX) += futex_compat.o -endif obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o obj-$(CONFIG_SMP) += smp.o ifneq ($(CONFIG_SMP),y) diff --git a/kernel/futex.c b/kernel/futex.c index 5cc8083a4c89..054105854e0e 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -44,6 +44,7 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include <linux/compat.h> #include <linux/slab.h> #include <linux/poll.h> #include <linux/fs.h> @@ -173,8 +174,10 @@ * double_lock_hb() and double_unlock_hb(), respectively. */ -#ifndef CONFIG_HAVE_FUTEX_CMPXCHG -int __read_mostly futex_cmpxchg_enabled; +#ifdef CONFIG_HAVE_FUTEX_CMPXCHG +#define futex_cmpxchg_enabled 1 +#else +static int __read_mostly futex_cmpxchg_enabled; #endif /* @@ -3417,7 +3420,7 @@ err_unlock: * Process a futex-list entry, check whether it's owned by the * dying task, and do notification if so: */ -int handle_futex_death(u32 __user *uaddr, struct task_struct *curr, int pi) +static int handle_futex_death(u32 __user *uaddr, struct task_struct *curr, int pi) { u32 uval, uninitialized_var(nval), mval; @@ -3612,10 +3615,10 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val, - struct timespec __user *, utime, u32 __user *, uaddr2, + struct __kernel_timespec __user *, utime, u32 __user *, uaddr2, u32, val3) { - struct timespec ts; + struct timespec64 ts; ktime_t t, *tp = NULL; u32 val2 = 0; int cmd = op & FUTEX_CMD_MASK; @@ -3625,12 +3628,12 @@ SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val, cmd == FUTEX_WAIT_REQUEUE_PI)) { if (unlikely(should_fail_futex(!(op & FUTEX_PRIVATE_FLAG)))) return -EFAULT; - if (copy_from_user(&ts, utime, sizeof(ts)) != 0) + if (get_timespec64(&ts, utime)) return -EFAULT; - if (!timespec_valid(&ts)) + if (!timespec64_valid(&ts)) return -EINVAL; - t = timespec_to_ktime(ts); + t = timespec64_to_ktime(ts); if (cmd == FUTEX_WAIT) t = ktime_add_safe(ktime_get(), t); tp = &t; @@ -3646,6 +3649,194 @@ SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val, return do_futex(uaddr, op, val, tp, uaddr2, val2, val3); } +#ifdef CONFIG_COMPAT +/* + * Fetch a robust-list pointer. Bit 0 signals PI futexes: + */ +static inline int +compat_fetch_robust_entry(compat_uptr_t *uentry, struct robust_list __user **entry, + compat_uptr_t __user *head, unsigned int *pi) +{ + if (get_user(*uentry, head)) + return -EFAULT; + + *entry = compat_ptr((*uentry) & ~1); + *pi = (unsigned int)(*uentry) & 1; + + return 0; +} + +static void __user *futex_uaddr(struct robust_list __user *entry, + compat_long_t futex_offset) +{ + compat_uptr_t base = ptr_to_compat(entry); + void __user *uaddr = compat_ptr(base + futex_offset); + + return uaddr; +} + +/* + * Walk curr->robust_list (very carefully, it's a userspace list!) + * and mark any locks found there dead, and notify any waiters. + * + * We silently return on any sign of list-walking problem. + */ +void compat_exit_robust_list(struct task_struct *curr) +{ + struct compat_robust_list_head __user *head = curr->compat_robust_list; + struct robust_list __user *entry, *next_entry, *pending; + unsigned int limit = ROBUST_LIST_LIMIT, pi, pip; + unsigned int uninitialized_var(next_pi); + compat_uptr_t uentry, next_uentry, upending; + compat_long_t futex_offset; + int rc; + + if (!futex_cmpxchg_enabled) + return; + + /* + * Fetch the list head (which was registered earlier, via + * sys_set_robust_list()): + */ + if (compat_fetch_robust_entry(&uentry, &entry, &head->list.next, &pi)) + return; + /* + * Fetch the relative futex offset: + */ + if (get_user(futex_offset, &head->futex_offset)) + return; + /* + * Fetch any possibly pending lock-add first, and handle it + * if it exists: + */ + if (compat_fetch_robust_entry(&upending, &pending, + &head->list_op_pending, &pip)) + return; + + next_entry = NULL; /* avoid warning with gcc */ + while (entry != (struct robust_list __user *) &head->list) { + /* + * Fetch the next entry in the list before calling + * handle_futex_death: + */ + rc = compat_fetch_robust_entry(&next_uentry, &next_entry, + (compat_uptr_t __user *)&entry->next, &next_pi); + /* + * A pending lock might already be on the list, so + * dont process it twice: + */ + if (entry != pending) { + void __user *uaddr = futex_uaddr(entry, futex_offset); + + if (handle_futex_death(uaddr, curr, pi)) + return; + } + if (rc) + return; + uentry = next_uentry; + entry = next_entry; + pi = next_pi; + /* + * Avoid excessively long or circular lists: + */ + if (!--limit) + break; + + cond_resched(); + } + if (pending) { + void __user *uaddr = futex_uaddr(pending, futex_offset); + + handle_futex_death(uaddr, curr, pip); + } +} + +COMPAT_SYSCALL_DEFINE2(set_robust_list, + struct compat_robust_list_head __user *, head, + compat_size_t, len) +{ + if (!futex_cmpxchg_enabled) + return -ENOSYS; + + if (unlikely(len != sizeof(*head))) + return -EINVAL; + + current->compat_robust_list = head; + + return 0; +} + +COMPAT_SYSCALL_DEFINE3(get_robust_list, int, pid, + compat_uptr_t __user *, head_ptr, + compat_size_t __user *, len_ptr) +{ + struct compat_robust_list_head __user *head; + unsigned long ret; + struct task_struct *p; + + if (!futex_cmpxchg_enabled) + return -ENOSYS; + + rcu_read_lock(); + + ret = -ESRCH; + if (!pid) + p = current; + else { + p = find_task_by_vpid(pid); + if (!p) + goto err_unlock; + } + + ret = -EPERM; + if (!ptrace_may_access(p, PTRACE_MODE_READ_REALCREDS)) + goto err_unlock; + + head = p->compat_robust_list; + rcu_read_unlock(); + + if (put_user(sizeof(*head), len_ptr)) + return -EFAULT; + return put_user(ptr_to_compat(head), head_ptr); + +err_unlock: + rcu_read_unlock(); + + return ret; +} +#endif /* CONFIG_COMPAT */ + +#ifdef CONFIG_COMPAT_32BIT_TIME +COMPAT_SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val, + struct old_timespec32 __user *, utime, u32 __user *, uaddr2, + u32, val3) +{ + struct timespec64 ts; + ktime_t t, *tp = NULL; + int val2 = 0; + int cmd = op & FUTEX_CMD_MASK; + + if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI || + cmd == FUTEX_WAIT_BITSET || + cmd == FUTEX_WAIT_REQUEUE_PI)) { + if (get_old_timespec32(&ts, utime)) + return -EFAULT; + if (!timespec64_valid(&ts)) + return -EINVAL; + + t = timespec64_to_ktime(ts); + if (cmd == FUTEX_WAIT) + t = ktime_add_safe(ktime_get(), t); + tp = &t; + } + if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE || + cmd == FUTEX_CMP_REQUEUE_PI || cmd == FUTEX_WAKE_OP) + val2 = (int) (unsigned long) utime; + + return do_futex(uaddr, op, val, tp, uaddr2, val2, val3); +} +#endif /* CONFIG_COMPAT_32BIT_TIME */ + static void __init futex_detect_cmpxchg(void) { #ifndef CONFIG_HAVE_FUTEX_CMPXCHG diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c deleted file mode 100644 index 410a77a8f6e2..000000000000 --- a/kernel/futex_compat.c +++ /dev/null @@ -1,202 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * linux/kernel/futex_compat.c - * - * Futex compatibililty routines. - * - * Copyright 2006, Red Hat, Inc., Ingo Molnar - */ - -#include <linux/linkage.h> -#include <linux/compat.h> -#include <linux/nsproxy.h> -#include <linux/futex.h> -#include <linux/ptrace.h> -#include <linux/syscalls.h> - -#include <linux/uaccess.h> - - -/* - * Fetch a robust-list pointer. Bit 0 signals PI futexes: - */ -static inline int -fetch_robust_entry(compat_uptr_t *uentry, struct robust_list __user **entry, - compat_uptr_t __user *head, unsigned int *pi) -{ - if (get_user(*uentry, head)) - return -EFAULT; - - *entry = compat_ptr((*uentry) & ~1); - *pi = (unsigned int)(*uentry) & 1; - - return 0; -} - -static void __user *futex_uaddr(struct robust_list __user *entry, - compat_long_t futex_offset) -{ - compat_uptr_t base = ptr_to_compat(entry); - void __user *uaddr = compat_ptr(base + futex_offset); - - return uaddr; -} - -/* - * Walk curr->robust_list (very carefully, it's a userspace list!) - * and mark any locks found there dead, and notify any waiters. - * - * We silently return on any sign of list-walking problem. - */ -void compat_exit_robust_list(struct task_struct *curr) -{ - struct compat_robust_list_head __user *head = curr->compat_robust_list; - struct robust_list __user *entry, *next_entry, *pending; - unsigned int limit = ROBUST_LIST_LIMIT, pi, pip; - unsigned int uninitialized_var(next_pi); - compat_uptr_t uentry, next_uentry, upending; - compat_long_t futex_offset; - int rc; - - if (!futex_cmpxchg_enabled) - return; - - /* - * Fetch the list head (which was registered earlier, via - * sys_set_robust_list()): - */ - if (fetch_robust_entry(&uentry, &entry, &head->list.next, &pi)) - return; - /* - * Fetch the relative futex offset: - */ - if (get_user(futex_offset, &head->futex_offset)) - return; - /* - * Fetch any possibly pending lock-add first, and handle it - * if it exists: - */ - if (fetch_robust_entry(&upending, &pending, - &head->list_op_pending, &pip)) - return; - - next_entry = NULL; /* avoid warning with gcc */ - while (entry != (struct robust_list __user *) &head->list) { - /* - * Fetch the next entry in the list before calling - * handle_futex_death: - */ - rc = fetch_robust_entry(&next_uentry, &next_entry, - (compat_uptr_t __user *)&entry->next, &next_pi); - /* - * A pending lock might already be on the list, so - * dont process it twice: - */ - if (entry != pending) { - void __user *uaddr = futex_uaddr(entry, futex_offset); - - if (handle_futex_death(uaddr, curr, pi)) - return; - } - if (rc) - return; - uentry = next_uentry; - entry = next_entry; - pi = next_pi; - /* - * Avoid excessively long or circular lists: - */ - if (!--limit) - break; - - cond_resched(); - } - if (pending) { - void __user *uaddr = futex_uaddr(pending, futex_offset); - - handle_futex_death(uaddr, curr, pip); - } -} - -COMPAT_SYSCALL_DEFINE2(set_robust_list, - struct compat_robust_list_head __user *, head, - compat_size_t, len) -{ - if (!futex_cmpxchg_enabled) - return -ENOSYS; - - if (unlikely(len != sizeof(*head))) - return -EINVAL; - - current->compat_robust_list = head; - - return 0; -} - -COMPAT_SYSCALL_DEFINE3(get_robust_list, int, pid, - compat_uptr_t __user *, head_ptr, - compat_size_t __user *, len_ptr) -{ - struct compat_robust_list_head __user *head; - unsigned long ret; - struct task_struct *p; - - if (!futex_cmpxchg_enabled) - return -ENOSYS; - - rcu_read_lock(); - - ret = -ESRCH; - if (!pid) - p = current; - else { - p = find_task_by_vpid(pid); - if (!p) - goto err_unlock; - } - - ret = -EPERM; - if (!ptrace_may_access(p, PTRACE_MODE_READ_REALCREDS)) - goto err_unlock; - - head = p->compat_robust_list; - rcu_read_unlock(); - - if (put_user(sizeof(*head), len_ptr)) - return -EFAULT; - return put_user(ptr_to_compat(head), head_ptr); - -err_unlock: - rcu_read_unlock(); - - return ret; -} - -COMPAT_SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val, - struct old_timespec32 __user *, utime, u32 __user *, uaddr2, - u32, val3) -{ - struct timespec ts; - ktime_t t, *tp = NULL; - int val2 = 0; - int cmd = op & FUTEX_CMD_MASK; - - if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI || - cmd == FUTEX_WAIT_BITSET || - cmd == FUTEX_WAIT_REQUEUE_PI)) { - if (compat_get_timespec(&ts, utime)) - return -EFAULT; - if (!timespec_valid(&ts)) - return -EINVAL; - - t = timespec_to_ktime(ts); - if (cmd == FUTEX_WAIT) - t = ktime_add_safe(ktime_get(), t); - tp = &t; - } - if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE || - cmd == FUTEX_CMP_REQUEUE_PI || cmd == FUTEX_WAKE_OP) - val2 = (int) (unsigned long) utime; - - return do_futex(uaddr, op, val, tp, uaddr2, val2, val3); -} diff --git a/kernel/signal.c b/kernel/signal.c index 9a32bc2088c9..53e07d97ffe0 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -2735,6 +2735,84 @@ int sigprocmask(int how, sigset_t *set, sigset_t *oldset) } EXPORT_SYMBOL(sigprocmask); +/* + * The api helps set app-provided sigmasks. + * + * This is useful for syscalls such as ppoll, pselect, io_pgetevents and + * epoll_pwait where a new sigmask is passed from userland for the syscalls. + */ +int set_user_sigmask(const sigset_t __user *usigmask, sigset_t *set, + sigset_t *oldset, size_t sigsetsize) +{ + if (!usigmask) + return 0; + + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + if (copy_from_user(set, usigmask, sizeof(sigset_t))) + return -EFAULT; + + *oldset = current->blocked; + set_current_blocked(set); + + return 0; +} +EXPORT_SYMBOL(set_user_sigmask); + +#ifdef CONFIG_COMPAT +int set_compat_user_sigmask(const compat_sigset_t __user *usigmask, + sigset_t *set, sigset_t *oldset, + size_t sigsetsize) +{ + if (!usigmask) + return 0; + + if (sigsetsize != sizeof(compat_sigset_t)) + return -EINVAL; + if (get_compat_sigset(set, usigmask)) + return -EFAULT; + + *oldset = current->blocked; + set_current_blocked(set); + + return 0; +} +EXPORT_SYMBOL(set_compat_user_sigmask); +#endif + +/* + * restore_user_sigmask: + * usigmask: sigmask passed in from userland. + * sigsaved: saved sigmask when the syscall started and changed the sigmask to + * usigmask. + * + * This is useful for syscalls such as ppoll, pselect, io_pgetevents and + * epoll_pwait where a new sigmask is passed in from userland for the syscalls. + */ +void restore_user_sigmask(const void __user *usigmask, sigset_t *sigsaved) +{ + + if (!usigmask) + return; + /* + * When signals are pending, do not restore them here. + * Restoring sigmask here can lead to delivering signals that the above + * syscalls are intended to block because of the sigmask passed in. + */ + if (signal_pending(current)) { + current->saved_sigmask = *sigsaved; + set_restore_sigmask(); + return; + } + + /* + * This is needed because the fast syscall return path does not restore + * saved_sigmask when signals are not pending. + */ + set_current_blocked(sigsaved); +} +EXPORT_SYMBOL(restore_user_sigmask); + /** * sys_rt_sigprocmask - change the list of currently blocked signals * @how: whether to add, remove, or set signals @@ -3254,7 +3332,71 @@ SYSCALL_DEFINE4(rt_sigtimedwait, const sigset_t __user *, uthese, return ret; } +#ifdef CONFIG_COMPAT_32BIT_TIME +SYSCALL_DEFINE4(rt_sigtimedwait_time32, const sigset_t __user *, uthese, + siginfo_t __user *, uinfo, + const struct old_timespec32 __user *, uts, + size_t, sigsetsize) +{ + sigset_t these; + struct timespec64 ts; + kernel_siginfo_t info; + int ret; + + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (copy_from_user(&these, uthese, sizeof(these))) + return -EFAULT; + + if (uts) { + if (get_old_timespec32(&ts, uts)) + return -EFAULT; + } + + ret = do_sigtimedwait(&these, &info, uts ? &ts : NULL); + + if (ret > 0 && uinfo) { + if (copy_siginfo_to_user(uinfo, &info)) + ret = -EFAULT; + } + + return ret; +} +#endif + #ifdef CONFIG_COMPAT +COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait_time64, compat_sigset_t __user *, uthese, + struct compat_siginfo __user *, uinfo, + struct __kernel_timespec __user *, uts, compat_size_t, sigsetsize) +{ + sigset_t s; + struct timespec64 t; + kernel_siginfo_t info; + long ret; + + if (sigsetsize != sizeof(sigset_t)) + return -EINVAL; + + if (get_compat_sigset(&s, uthese)) + return -EFAULT; + + if (uts) { + if (get_timespec64(&t, uts)) + return -EFAULT; + } + + ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); + + if (ret > 0 && uinfo) { + if (copy_siginfo_to_user32(uinfo, &info)) + ret = -EFAULT; + } + + return ret; +} + +#ifdef CONFIG_COMPAT_32BIT_TIME COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese, struct compat_siginfo __user *, uinfo, struct old_timespec32 __user *, uts, compat_size_t, sigsetsize) @@ -3285,6 +3427,7 @@ COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese, return ret; } #endif +#endif /** * sys_kill - send a signal to a process diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c index df556175be50..ab9d0e3c6d50 100644 --- a/kernel/sys_ni.c +++ b/kernel/sys_ni.c @@ -284,7 +284,9 @@ COND_SYSCALL_COMPAT(move_pages); COND_SYSCALL(perf_event_open); COND_SYSCALL(accept4); COND_SYSCALL(recvmmsg); +COND_SYSCALL(recvmmsg_time32); COND_SYSCALL_COMPAT(recvmmsg); +COND_SYSCALL_COMPAT(recvmmsg_time64); /* * Architecture specific syscalls: see further below diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index bc3a3c37ec9c..36a2bef00125 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -554,17 +554,9 @@ static void sync_rtc_clock(void) } #ifdef CONFIG_GENERIC_CMOS_UPDATE -int __weak update_persistent_clock(struct timespec now) -{ - return -ENODEV; -} - int __weak update_persistent_clock64(struct timespec64 now64) { - struct timespec now; - - now = timespec64_to_timespec(now64); - return update_persistent_clock(now); + return -ENODEV; } #endif diff --git a/kernel/time/time.c b/kernel/time/time.c index 5aa0a156e331..2edb5088a70b 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -384,42 +384,6 @@ time64_t mktime64(const unsigned int year0, const unsigned int mon0, EXPORT_SYMBOL(mktime64); /** - * set_normalized_timespec - set timespec sec and nsec parts and normalize - * - * @ts: pointer to timespec variable to be set - * @sec: seconds to set - * @nsec: nanoseconds to set - * - * Set seconds and nanoseconds field of a timespec variable and - * normalize to the timespec storage format - * - * Note: The tv_nsec part is always in the range of - * 0 <= tv_nsec < NSEC_PER_SEC - * For negative values only the tv_sec field is negative ! - */ -void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec) -{ - while (nsec >= NSEC_PER_SEC) { - /* - * The following asm() prevents the compiler from - * optimising this loop into a modulo operation. See - * also __iter_div_u64_rem() in include/linux/time.h - */ - asm("" : "+rm"(nsec)); - nsec -= NSEC_PER_SEC; - ++sec; - } - while (nsec < 0) { - asm("" : "+rm"(nsec)); - nsec += NSEC_PER_SEC; - --sec; - } - ts->tv_sec = sec; - ts->tv_nsec = nsec; -} -EXPORT_SYMBOL(set_normalized_timespec); - -/** * ns_to_timespec - Convert nanoseconds to timespec * @nsec: the nanoseconds value to be converted * diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index c801e25875a3..ac5dbf2cd4a2 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -1464,7 +1464,7 @@ u64 timekeeping_max_deferment(void) } /** - * read_persistent_clock - Return time from the persistent clock. + * read_persistent_clock64 - Return time from the persistent clock. * * Weak dummy function for arches that do not yet support it. * Reads the time from the battery backed persistent clock. @@ -1472,20 +1472,12 @@ u64 timekeeping_max_deferment(void) * * XXX - Do be sure to remove it once all arches implement it. */ -void __weak read_persistent_clock(struct timespec *ts) +void __weak read_persistent_clock64(struct timespec64 *ts) { ts->tv_sec = 0; ts->tv_nsec = 0; } -void __weak read_persistent_clock64(struct timespec64 *ts64) -{ - struct timespec ts; - - read_persistent_clock(&ts); - *ts64 = timespec_to_timespec64(ts); -} - /** * read_persistent_wall_and_boot_offset - Read persistent clock, and also offset * from the boot. diff --git a/net/compat.c b/net/compat.c index 47a614b370cd..f7084780a8f8 100644 --- a/net/compat.c +++ b/net/compat.c @@ -810,34 +810,23 @@ COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len return __compat_sys_recvfrom(fd, buf, len, flags, addr, addrlen); } -static int __compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, - unsigned int vlen, unsigned int flags, - struct old_timespec32 __user *timeout) +COMPAT_SYSCALL_DEFINE5(recvmmsg_time64, int, fd, struct compat_mmsghdr __user *, mmsg, + unsigned int, vlen, unsigned int, flags, + struct __kernel_timespec __user *, timeout) { - int datagrams; - struct timespec64 ktspec; - - if (timeout == NULL) - return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, - flags | MSG_CMSG_COMPAT, NULL); - - if (compat_get_timespec64(&ktspec, timeout)) - return -EFAULT; - - datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, - flags | MSG_CMSG_COMPAT, &ktspec); - if (datagrams > 0 && compat_put_timespec64(&ktspec, timeout)) - datagrams = -EFAULT; - - return datagrams; + return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, + flags | MSG_CMSG_COMPAT, timeout, NULL); } +#ifdef CONFIG_COMPAT_32BIT_TIME COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags, struct old_timespec32 __user *, timeout) { - return __compat_sys_recvmmsg(fd, mmsg, vlen, flags, timeout); + return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, + flags | MSG_CMSG_COMPAT, NULL, timeout); } +#endif COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) { @@ -925,8 +914,9 @@ COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args) ret = __compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); break; case SYS_RECVMMSG: - ret = __compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], - compat_ptr(a[4])); + ret = __sys_recvmmsg(a0, compat_ptr(a1), a[2], + a[3] | MSG_CMSG_COMPAT, NULL, + compat_ptr(a[4])); break; case SYS_ACCEPT4: ret = __sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); diff --git a/net/socket.c b/net/socket.c index 334fcc617ef2..e89884e2197b 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2341,8 +2341,9 @@ SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, * Linux recvmmsg interface */ -int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, - unsigned int flags, struct timespec64 *timeout) +static int do_recvmmsg(int fd, struct mmsghdr __user *mmsg, + unsigned int vlen, unsigned int flags, + struct timespec64 *timeout) { int fput_needed, err, datagrams; struct socket *sock; @@ -2451,25 +2452,32 @@ out_put: return datagrams; } -static int do_sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, - unsigned int vlen, unsigned int flags, - struct __kernel_timespec __user *timeout) +int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, + unsigned int vlen, unsigned int flags, + struct __kernel_timespec __user *timeout, + struct old_timespec32 __user *timeout32) { int datagrams; struct timespec64 timeout_sys; - if (flags & MSG_CMSG_COMPAT) - return -EINVAL; - - if (!timeout) - return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); + if (timeout && get_timespec64(&timeout_sys, timeout)) + return -EFAULT; - if (get_timespec64(&timeout_sys, timeout)) + if (timeout32 && get_old_timespec32(&timeout_sys, timeout32)) return -EFAULT; - datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); + if (!timeout && !timeout32) + return do_recvmmsg(fd, mmsg, vlen, flags, NULL); + + datagrams = do_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); - if (datagrams > 0 && put_timespec64(&timeout_sys, timeout)) + if (datagrams <= 0) + return datagrams; + + if (timeout && put_timespec64(&timeout_sys, timeout)) + datagrams = -EFAULT; + + if (timeout32 && put_old_timespec32(&timeout_sys, timeout32)) datagrams = -EFAULT; return datagrams; @@ -2479,8 +2487,23 @@ SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, unsigned int, vlen, unsigned int, flags, struct __kernel_timespec __user *, timeout) { - return do_sys_recvmmsg(fd, mmsg, vlen, flags, timeout); + if (flags & MSG_CMSG_COMPAT) + return -EINVAL; + + return __sys_recvmmsg(fd, mmsg, vlen, flags, timeout, NULL); +} + +#ifdef CONFIG_COMPAT_32BIT_TIME +SYSCALL_DEFINE5(recvmmsg_time32, int, fd, struct mmsghdr __user *, mmsg, + unsigned int, vlen, unsigned int, flags, + struct old_timespec32 __user *, timeout) +{ + if (flags & MSG_CMSG_COMPAT) + return -EINVAL; + + return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL, timeout); } +#endif #ifdef __ARCH_WANT_SYS_SOCKETCALL /* Argument list sizes for sys_socketcall */ @@ -2600,8 +2623,15 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) a[2], true); break; case SYS_RECVMMSG: - err = do_sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], - a[3], (struct __kernel_timespec __user *)a[4]); + if (IS_ENABLED(CONFIG_64BIT) || !IS_ENABLED(CONFIG_64BIT_TIME)) + err = __sys_recvmmsg(a0, (struct mmsghdr __user *)a1, + a[2], a[3], + (struct __kernel_timespec __user *)a[4], + NULL); + else + err = __sys_recvmmsg(a0, (struct mmsghdr __user *)a1, + a[2], a[3], NULL, + (struct old_timespec32 __user *)a[4]); break; case SYS_ACCEPT4: err = __sys_accept4(a0, (struct sockaddr __user *)a1, |