| commit | 194b3da873fd334ef183806db751473512af29ce | |
| author | Vasiliy Kulikov <segoon@openwall.com> | |
| Thu, 14 Apr 2011 16:55:16 +0000 (14 20:55 +0400) | ||
| committer | Dave Airlie <airlied@redhat.com> | |
| Thu, 21 Apr 2011 02:16:55 +0000 (21 12:16 +1000) | ||
| tree | cb6ac3d05ba2e0a07c02ea1cef0e41477ea29d2b | treesnapshot (tar.gz zip) |
| parent | b522f02184b413955f3bc952e3776ce41edc6355 | commitdiff |
agp: fix arbitrary kernel memory writes
pg_start is copied from userspace on AGPIOC_BIND and AGPIOC_UNBIND ioctl
cmds of agp_ioctl() and passed to agpioc_bind_wrap(). As said in the
comment, (pg_start + mem->page_count) may wrap in case of AGPIOC_BIND,
and it is not checked at all in case of AGPIOC_UNBIND. As a result, user
with sufficient privileges (usually "video" group) may generate either
local DoS or privilege escalation.
Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
pg_start is copied from userspace on AGPIOC_BIND and AGPIOC_UNBIND ioctl
cmds of agp_ioctl() and passed to agpioc_bind_wrap(). As said in the
comment, (pg_start + mem->page_count) may wrap in case of AGPIOC_BIND,
and it is not checked at all in case of AGPIOC_UNBIND. As a result, user
with sufficient privileges (usually "video" group) may generate either
local DoS or privilege escalation.
Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
| drivers/char/agp/generic.c | diffblobblamehistory |