| commit | 7f482d63e27696707ac00eb838ed9379f89957b8 | |
| author | Vasiliy Kulikov <segoon@openwall.com> | |
| Thu, 14 Apr 2011 16:55:16 +0000 (14 20:55 +0400) | ||
| committer | Andi Kleen <ak@linux.intel.com> | |
| Mon, 1 Aug 2011 20:54:41 +0000 (1 13:54 -0700) | ||
| tree | 42b995f87d66664854623c94864edffd4d4da217 | treesnapshot (tar.gz zip) |
| parent | 399f9eb9c628914fe5f1acef5bb2dd736227597c | commitdiff |
agp: fix arbitrary kernel memory writes
[ upstream commit 194b3da873fd334ef183806db751473512af29ce ]
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>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
[ upstream commit 194b3da873fd334ef183806db751473512af29ce ]
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>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
| drivers/char/agp/generic.c | diffblobblamehistory |