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| author |   Mike Snitzer <snitzer@redhat.com> | 2016-10-18 14:02:04 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-10-18 14:02:04 -0400 |
| commit | 937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d (patch) | |
| tree | b7e0c3256cb93bc1f5eb838d3f36039efbb7a56b /drivers/md | |
| parent | dm: free io_barrier after blk_cleanup_queue call (diff) | |
| download | linux-dev-937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d.tar.xz linux-dev-937fa62e8a00d0b4bc2c0a40567d7c88ab2b2e8d.zip | |
dm rq: clear kworker_task if kthread_run() returned an error
cleanup_mapped_device() calls kthread_stop() if kworker_task is
non-NULL. Currently the assigned value could be a valid task struct or
an error code (e.g -ENOMEM). Reset md->kworker_task to NULL if
kthread_run() returned an erorr.
Fixes: 7193a9defc ("dm rq: check kthread_run return for .request_fn request-based DM")
Cc: stable@vger.kernel.org # 4.8
Reported-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-rq.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index 5eacce1ef88b..63e43f261cce 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -856,8 +856,11 @@ int dm_old_init_request_queue(struct mapped_device *md) init_kthread_worker(&md->kworker); md->kworker_task = kthread_run(kthread_worker_fn, &md->kworker, "kdmwork-%s", dm_device_name(md)); - if (IS_ERR(md->kworker_task)) - return PTR_ERR(md->kworker_task); + if (IS_ERR(md->kworker_task)) { + int error = PTR_ERR(md->kworker_task); + md->kworker_task = NULL; + return error; + } elv_register_queue(md->queue); |