| commit | 148dc7bad631f77c6bc1d1ce9e7608e3d098f312 | |
| author | Vasiliy Kulikov <segoon@openwall.com> | |
| Thu, 14 Apr 2011 16:55:16 +0000 (14 20:55 +0400) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Mon, 9 May 2011 22:54:54 +0000 (9 15:54 -0700) | ||
| tree | 5274cd8c5c6d805f9a2442b9135cd50afb0cb18b | treesnapshot (tar.gz zip) |
| parent | e411ea9e3b04f4eb2d3ff833e4e0055fd6e12331 | commitdiff |
agp: fix arbitrary kernel memory writes
commit 194b3da873fd334ef183806db751473512af29ce upstream.
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: Greg Kroah-Hartman <gregkh@suse.de>
commit 194b3da873fd334ef183806db751473512af29ce upstream.
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: Greg Kroah-Hartman <gregkh@suse.de>
| drivers/char/agp/generic.c | diffblobblamehistory |