blk-mq: make sure active queue usage is held for bio_integrity_prep()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: blk-mq: make sure active queue usage is held for bio_integrity_prep() 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

References

• https://git.kernel.org/stable/c/b5c8e0ff76d10f6bf70a7237678f27c20cf59bc9
• https://git.kernel.org/stable/c/e9c309ded295b7f8849097d71ae231456ca79f78
• https://git.kernel.org/stable/c/b80056bd75a16e4550873ecefe12bc8fd190b1cf
• https://git.kernel.org/stable/c/b0077e269f6c152e807fdac90b58caf012cdbaab