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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-06-14 13:27:50 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-06-14 13:27:50 -0600 |
| commit | dc9edc44de6cd7cc8cc7f5b36c1adb221eda3207 (patch) | |
| tree | f749db9a9accb61b5b6e7d0d88b4e45b16326a46 /block/blk-stat.c | |
| parent | 63f700aab4c11d46626de3cd051dae56cf7e9056 (diff) | |
block: Fix a blk_exit_rl() regression
Avoid that the following complaint is reported:
BUG: sleeping function called from invalid context at kernel/workqueue.c:2790
in_atomic(): 1, irqs_disabled(): 0, pid: 41, name: rcuop/3
1 lock held by rcuop/3/41:
#0: (rcu_callback){......}, at: [<ffffffff8111f9a2>] rcu_nocb_kthread+0x282/0x500
Call Trace:
dump_stack+0x86/0xcf
___might_sleep+0x174/0x260
__might_sleep+0x4a/0x80
flush_work+0x7e/0x2e0
__cancel_work_timer+0x143/0x1c0
cancel_work_sync+0x10/0x20
blk_throtl_exit+0x25/0x60
blkcg_exit_queue+0x35/0x40
blk_release_queue+0x42/0x130
kobject_put+0xa9/0x190
This happens since we invoke callbacks that need to block from the
queue release handler. Fix this by pushing the final release to
a workqueue.
Reported-by: Ross Zwisler <zwisler@gmail.com>
Fixes: commit b425e5049258 ("block: Avoid that blk_exit_rl() triggers a use-after-free")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Updated changelog
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-stat.c')
0 files changed, 0 insertions, 0 deletions