diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2014-05-06 12:50:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-06 13:05:00 -0700 |
| commit | 3ca9e5d36afb5c0a6ee6ceee69e507370beb59c6 (patch) | |
| tree | db4bf1253bbaba30d4955b4eed1a5708ec73793c | |
| parent | d353efd02357a74753cd45f367a2d3d357fd6904 (diff) | |
| download | linux-3ca9e5d36afb5c0a6ee6ceee69e507370beb59c6.tar.bz2 | |
agp: info leak in agpioc_info_wrap()
On 64 bit systems the agp_info struct has a 4 byte hole between
->agp_mode and ->aper_base. We need to clear it to avoid disclosing
stack information to userspace.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/char/agp/frontend.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c index 8121b4c70ede..b29703324e94 100644 --- a/drivers/char/agp/frontend.c +++ b/drivers/char/agp/frontend.c @@ -730,6 +730,7 @@ static int agpioc_info_wrap(struct agp_file_private *priv, void __user *arg) agp_copy_info(agp_bridge, &kerninfo); + memset(&userinfo, 0, sizeof(userinfo)); userinfo.version.major = kerninfo.version.major; userinfo.version.minor = kerninfo.version.minor; userinfo.bridge_id = kerninfo.device->vendor | |