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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2020-10-24 03:04:26 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-25 11:44:16 -0700 |
| commit | 986b9eacb25910865b50e5f298aa8e2df7642f1b (patch) | |
| tree | 300b9558aac3c868b7a4213b6de09117147b81c5 /kernel | |
| parent | 23224e45004ed84c8466fd1e8e5860f541187029 (diff) | |
| download | linux-986b9eacb25910865b50e5f298aa8e2df7642f1b.tar.gz | |
kernel/sys.c: fix prototype of prctl_get_tid_address()
tid_addr is not a "pointer to (pointer to int in userspace)"; it is in fact a "pointer to (pointer to int in userspace) in userspace". So sparse rightfully complains about passing a kernel pointer to put_user(). Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sys.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 84594bcd886e..a730c03ee607 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -2238,12 +2238,12 @@ out: } #ifdef CONFIG_CHECKPOINT_RESTORE -static int prctl_get_tid_address(struct task_struct *me, int __user **tid_addr) +static int prctl_get_tid_address(struct task_struct *me, int __user * __user *tid_addr) { return put_user(me->clear_child_tid, tid_addr); } #else -static int prctl_get_tid_address(struct task_struct *me, int __user **tid_addr) +static int prctl_get_tid_address(struct task_struct *me, int __user * __user *tid_addr) { return -EINVAL; } @@ -2427,7 +2427,7 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, error = prctl_set_mm(arg2, arg3, arg4, arg5); break; case PR_GET_TID_ADDRESS: - error = prctl_get_tid_address(me, (int __user **)arg2); + error = prctl_get_tid_address(me, (int __user * __user *)arg2); break; case PR_SET_CHILD_SUBREAPER: me->signal->is_child_subreaper = !!arg2; |