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Mingzhe Zou
20a8e451ec
In the previous patch ("bcache: fix cached_dev.sb_bio use-after-free and
crash"), we adopted a simple modification suggestion from AI to fix the
use-after-free.
But in actual testing, we found an extreme case where the device is
stopped before calling bch_write_bdev_super().
At this point, struct closure sb_write has not been initialized yet.
For this patch, we ensure that sb_bio has been completed via
sb_write_mutex.
Signed-off-by: Mingzhe Zou <[email protected]>
Signed-off-by: Coly Li <[email protected]>
Link: https://patch.msgid.link/[email protected]
Fixes: fec114a98b ("bcache: fix cached_dev.sb_bio use-after-free and crash")
Signed-off-by: Jens Axboe <[email protected]>