diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-11-11 14:26:34 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-08 10:21:19 -0800 |
| commit | bd7d2351462306b3244c3572c48670c77aa21528 (patch) | |
| tree | 920d63553ab391fafd40c5899654431e7669eef9 /fs | |
| parent | 4549526e54461f6be8b229703d3c9488da1eb131 (diff) | |
fs: add missing compat_ptr handling for FS_IOC_RESVSP ioctl
commit 7779d7bed950a7fb1af4f540c2f82a6b81b65901 upstream.
For FS_IOC_RESVSP and FS_IOC_RESVSP64 compat_sys_ioctl() uses its
arg argument as a pointer to userspace. However it is missing a
a call to compat_ptr() which will do a proper pointer conversion.
This was introduced with 3e63cbb1 "fs: Add new pre-allocation ioctls
to vfs for compatibility with legacy xfs ioctls".
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ankit Jain <me@ankitjain.org>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Arnd Bergmann <arndbergmann@googlemail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/compat_ioctl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index f91fd51b32e..d84e7058c29 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -1800,7 +1800,7 @@ struct space_resv_32 { /* just account for different alignment */ static int compat_ioctl_preallocate(struct file *file, unsigned long arg) { - struct space_resv_32 __user *p32 = (void __user *)arg; + struct space_resv_32 __user *p32 = compat_ptr(arg); struct space_resv __user *p = compat_alloc_user_space(sizeof(*p)); if (copy_in_user(&p->l_type, &p32->l_type, sizeof(s16)) || @@ -2802,7 +2802,7 @@ asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, #else case FS_IOC_RESVSP: case FS_IOC_RESVSP64: - error = ioctl_preallocate(filp, (void __user *)arg); + error = ioctl_preallocate(filp, compat_ptr(arg)); goto out_fput; #endif |