blk_integrity_unregister() can come if queue usage counter isn't held
for one bio with integrity prepared, so this request may be completed with
calling profile->complete_fn, then kernel panic.
Another constraint is that bio_integrity_prep() needs to be called
before bio merge.
Fix the issue by:
- call bio_integrity_prep() with one queue usage counter grabbed reliably
- call bio_integrity_prep() before bio merge
Fixes: 900e080752 ("block: move queue enter logic into blk_mq_submit_bio()")
Reported-by: Yi Zhang <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Tested-by: Yi Zhang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Christoph Hellwig
b0077e269f