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| author | Jan Kara <jack@suse.cz> | 2014-10-22 15:34:21 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-10-22 07:59:25 -0600 |
| commit | 31f9690e6eaf549f3e643f6a8f7dab84fd31997a (patch) | |
| tree | c31966132649fc7154b57536f6f8355251d201f1 | |
| parent | 76d8137a31139f0d69ecc4177497ad6b8d4f016c (diff) | |
| download | linux-31f9690e6eaf549f3e643f6a8f7dab84fd31997a.tar.gz linux-31f9690e6eaf549f3e643f6a8f7dab84fd31997a.tar.bz2 linux-31f9690e6eaf549f3e643f6a8f7dab84fd31997a.zip | |
null_blk: Cleanup error recovery in null_add_dev()
When creation of queues fails in init_driver_queues(), we free the
queues. But null_add_dev() doesn't test for this failure and continues
with the setup leading to strange consequences, likely oops. Fix the
problem by testing whether init_driver_queues() failed and do proper
error cleanup.
Coverity-id: 1148005
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/block/null_blk.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index 2671a3f02f0c..8001e812018b 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -450,14 +450,10 @@ static int init_driver_queues(struct nullb *nullb) ret = setup_commands(nq); if (ret) - goto err_queue; + return ret; nullb->nr_queues++; } - return 0; -err_queue: - cleanup_queues(nullb); - return ret; } static int null_add_dev(void) @@ -507,7 +503,9 @@ static int null_add_dev(void) goto out_cleanup_queues; } blk_queue_make_request(nullb->q, null_queue_bio); - init_driver_queues(nullb); + rv = init_driver_queues(nullb); + if (rv) + goto out_cleanup_blk_queue; } else { nullb->q = blk_init_queue_node(null_request_fn, &nullb->lock, home_node); if (!nullb->q) { @@ -516,7 +514,9 @@ static int null_add_dev(void) } blk_queue_prep_rq(nullb->q, null_rq_prep_fn); blk_queue_softirq_done(nullb->q, null_softirq_done_fn); - init_driver_queues(nullb); + rv = init_driver_queues(nullb); + if (rv) + goto out_cleanup_blk_queue; } nullb->q->queuedata = nullb; |