Commit 12176503366885edd542389eed3aaf94be163fdb
Committed by
Linus Torvalds
1 parent
20f1de659b
Exists in
master
and in
20 other branches
fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error check
The compat ioctl for VIDEO_SET_SPU_PALETTE was missing an error check while converting ioctl arguments. This could lead to leaking kernel stack contents into userspace. Patch extracted from existing fix in grsecurity. Signed-off-by: Kees Cook <keescook@chromium.org> Cc: David Miller <davem@davemloft.net> Cc: Brad Spengler <spender@grsecurity.net> Cc: PaX Team <pageexec@freemail.hu> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Showing 1 changed file with 2 additions and 0 deletions Side-by-side Diff
fs/compat_ioctl.c
... | ... | @@ -210,6 +210,8 @@ |
210 | 210 | |
211 | 211 | err = get_user(palp, &up->palette); |
212 | 212 | err |= get_user(length, &up->length); |
213 | + if (err) | |
214 | + return -EFAULT; | |
213 | 215 | |
214 | 216 | up_native = compat_alloc_user_space(sizeof(struct video_spu_palette)); |
215 | 217 | err = put_user(compat_ptr(palp), &up_native->palette); |