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H A D | workqueue.c | 77f300b1 Wed Apr 16 00:32:29 CDT 2014 Daeseok Youn <daeseok.youn@gmail.com> workqueue: fix bugs in wq_update_unbound_numa() failure path
wq_update_unbound_numa() failure path has the following two bugs.
- alloc_unbound_pwq() is called without holding wq->mutex; however, if the allocation fails, it jumps to out_unlock which tries to unlock wq->mutex.
- The function should switch to dfl_pwq on failure but didn't do so after alloc_unbound_pwq() failure.
Fix it by regrabbing wq->mutex and jumping to use_dfl_pwq on alloc_unbound_pwq() failure.
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Acked-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org Fixes: 4c16bd327c74 ("workqueue: implement NUMA affinity for unbound workqueues") 77f300b1 Wed Apr 16 00:32:29 CDT 2014 Daeseok Youn <daeseok.youn@gmail.com> workqueue: fix bugs in wq_update_unbound_numa() failure path wq_update_unbound_numa() failure path has the following two bugs. - alloc_unbound_pwq() is called without holding wq->mutex; however, if the allocation fails, it jumps to out_unlock which tries to unlock wq->mutex. - The function should switch to dfl_pwq on failure but didn't do so after alloc_unbound_pwq() failure. Fix it by regrabbing wq->mutex and jumping to use_dfl_pwq on alloc_unbound_pwq() failure. Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com> Acked-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Tejun Heo <tj@kernel.org> Cc: stable@vger.kernel.org Fixes: 4c16bd327c74 ("workqueue: implement NUMA affinity for unbound workqueues")
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