The patch titled
Subject: fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error check
has been added to the -mm tree. Its filename is
fs-compat_ioctlc-video_set_spu_palette-missing-error-check.patch
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------------------------------------------------------
From: Kees Cook <[email protected]>
Subject: 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 <[email protected]>
Cc: David Miller <[email protected]>
Cc: Brad Spengler <[email protected]>
Cc: PaX Team <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
fs/compat_ioctl.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN
fs/compat_ioctl.c~fs-compat_ioctlc-video_set_spu_palette-missing-error-check
fs/compat_ioctl.c
---
a/fs/compat_ioctl.c~fs-compat_ioctlc-video_set_spu_palette-missing-error-check
+++ a/fs/compat_ioctl.c
@@ -210,6 +210,8 @@ static int do_video_set_spu_palette(unsi
err = get_user(palp, &up->palette);
err |= get_user(length, &up->length);
+ if (err)
+ return -EFAULT;
up_native = compat_alloc_user_space(sizeof(struct video_spu_palette));
err = put_user(compat_ptr(palp), &up_native->palette);
_
Patches currently in -mm which might be from [email protected] are
gen_init_cpio-avoid-stack-overflow-when-expanding.patch
fs-compat_ioctlc-video_set_spu_palette-missing-error-check.patch
linux-next.patch
fs-pstore-ramc-fix-up-section-annotations.patch
proc-dont-show-nonexistent-capabilities.patch
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