diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2018-08-16 21:37:56 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2018-09-10 12:41:06 -0400 |
| commit | 89c0c24b4fa137cc846f50b3595f42e5f19da13b (patch) | |
| tree | 4811f3807ddf58b707b9f1034df1868e9d994dd1 /net/bluetooth | |
| parent | cc04f6e2421ad0da0f44f0fbf8e8259f3966f2a1 (diff) | |
| download | linux-89c0c24b4fa137cc846f50b3595f42e5f19da13b.tar.gz | |
cmtp: fix compat_ioctl
Use compat_ptr(). And don't mess with fs/compat_ioctl.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/cmtp/sock.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/net/bluetooth/cmtp/sock.c b/net/bluetooth/cmtp/sock.c index e08f28fadd65..defdd4871919 100644 --- a/net/bluetooth/cmtp/sock.c +++ b/net/bluetooth/cmtp/sock.c @@ -63,17 +63,16 @@ static int cmtp_sock_release(struct socket *sock) return 0; } -static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) +static int do_cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, void __user *argp) { struct cmtp_connadd_req ca; struct cmtp_conndel_req cd; struct cmtp_connlist_req cl; struct cmtp_conninfo ci; struct socket *nsock; - void __user *argp = (void __user *)arg; int err; - BT_DBG("cmd %x arg %lx", cmd, arg); + BT_DBG("cmd %x arg %p", cmd, argp); switch (cmd) { case CMTPCONNADD: @@ -137,16 +136,22 @@ static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long return -EINVAL; } +static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) +{ + return do_cmtp_sock_ioctl(sock, cmd, (void __user *)arg); +} + #ifdef CONFIG_COMPAT static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { + void __user *argp = compat_ptr(arg); if (cmd == CMTPGETCONNLIST) { struct cmtp_connlist_req cl; + u32 __user *p = argp; u32 uci; int err; - if (get_user(cl.cnum, (u32 __user *) arg) || - get_user(uci, (u32 __user *) (arg + 4))) + if (get_user(cl.cnum, p) || get_user(uci, p + 1)) return -EFAULT; cl.ci = compat_ptr(uci); @@ -156,13 +161,13 @@ static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigne err = cmtp_get_connlist(&cl); - if (!err && put_user(cl.cnum, (u32 __user *) arg)) + if (!err && put_user(cl.cnum, p)) err = -EFAULT; return err; } - return cmtp_sock_ioctl(sock, cmd, arg); + return do_cmtp_sock_ioctl(sock, cmd, argp); } #endif |