diff options
| author | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2021-01-20 11:28:02 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-01-27 10:31:54 +0300 |
| commit | 048c96e28674f15c0403deba2104ffba64544a06 (patch) | |
| tree | d2c8153fb869d4220db9447a3434c7e2a25755a6 /drivers/media/v4l2-core/v4l2-ctrls.c | |
| parent | 036bf04f14a1bfc6db771e8e1b8f53eb3f092006 (diff) | |
| download | linux-048c96e28674f15c0403deba2104ffba64544a06.tar.xz | |
media: v4l2-ctrls.c: fix shift-out-of-bounds in std_validate
If a menu has more than 64 items, then don't check menu_skip_mask
for items 65 and up.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+42d8c7c3d3e594b34346@syzkaller.appspotmail.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-ctrls.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-ctrls.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c index f7b310240af2..016cf6204cbb 100644 --- a/drivers/media/v4l2-core/v4l2-ctrls.c +++ b/drivers/media/v4l2-core/v4l2-ctrls.c @@ -2181,7 +2181,8 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx, case V4L2_CTRL_TYPE_INTEGER_MENU: if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum) return -ERANGE; - if (ctrl->menu_skip_mask & (1ULL << ptr.p_s32[idx])) + if (ptr.p_s32[idx] < BITS_PER_LONG_LONG && + (ctrl->menu_skip_mask & BIT_ULL(ptr.p_s32[idx]))) return -EINVAL; if (ctrl->type == V4L2_CTRL_TYPE_MENU && ctrl->qmenu[ptr.p_s32[idx]][0] == '\0') |