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| author | Tejun Heo <tj@kernel.org> | 2020-09-01 21:52:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-09 20:14:30 +0300 |
| commit | 70d22582c3eb6d50c30574019777d546fbd5cc81 (patch) | |
| tree | 4d768ef643cecf2e0f78e5d23917a82f65f7f036 /block/blk-stat.c | |
| parent | 57fd9f8eb60389e645256b17fce50b29b0f869ee (diff) | |
| download | linux-70d22582c3eb6d50c30574019777d546fbd5cc81.tar.xz | |
blk-iocost: ioc_pd_free() shouldn't assume irq disabled
commit 5aeac7c4b16069aae49005f0a8d4526baa83341b upstream.
ioc_pd_free() grabs irq-safe ioc->lock without ensuring that irq is disabled
when it can be called with irq disabled or enabled. This has a small chance
of causing A-A deadlocks and triggers lockdep splats. Use irqsave operations
instead.
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 7caa47151ab2 ("blkcg: implement blk-iocost")
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'block/blk-stat.c')
0 files changed, 0 insertions, 0 deletions