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| author | Jens Axboe <axboe@kernel.dk> | 2018-09-04 20:52:34 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-09-04 20:54:58 +0300 |
| commit | bc811f05d77f47059c197a98b6ad242eb03999cb (patch) | |
| tree | e96cabff009625665432d1b98fba898eabaa89ba /block | |
| parent | 3111885015b458c97b4cf272e2a87f1d6f0ed06a (diff) | |
| download | linux-bc811f05d77f47059c197a98b6ad242eb03999cb.tar.xz | |
nbd: don't allow invalid blocksize settings
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>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions