diff options
| author | Jens Axboe <axboe@kernel.dk> | 2018-09-04 11:52:34 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-19 22:43:35 +0200 |
| commit | 23ecbbad7bf921f83a5c99718ded203676ddd91c (patch) | |
| tree | bf4b9d906919d98156b5dcdd3f9079f5da4d8011 /block | |
| parent | 425739151e03c00487910a9d9cdfbd55cceb9975 (diff) | |
nbd: don't allow invalid blocksize settings
commit bc811f05d77f47059c197a98b6ad242eb03999cb upstream.
syzbot reports a divide-by-zero off the NBD_SET_BLKSIZE ioctl.
We need proper validation of the input here. Not just if it's
zero, but also if the value is a power-of-2 and in a valid
range. Add that.
Cc: stable@vger.kernel.org
Reported-by: syzbot <syzbot+25dbecbec1e62c6b0dd4@syzkaller.appspotmail.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions