diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2021-03-26 14:32:32 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2021-03-26 14:51:50 -0400 |
| commit | 4edbe1d7bcffcd6269f3b5eb63f710393ff2ec7a (patch) | |
| tree | acb59de82e8576d658a2a2eb47b520c126f87ebd /drivers/ide/ide-floppy_ioctl.c | |
| parent | 5424a0b867e65f1ecf34ffe88d091a4fcbb35bc1 (diff) | |
dm ioctl: fix out of bounds array access when no devices
If there are not any dm devices, we need to zero the "dev" argument in
the first structure dm_name_list. However, this can cause out of
bounds write, because the "needed" variable is zero and len may be
less than eight.
Fix this bug by reporting DM_BUFFER_FULL_FLAG if the result buffer is
too small to hold the "nl->dev" value.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/ide/ide-floppy_ioctl.c')
0 files changed, 0 insertions, 0 deletions