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Change History

In the Linux kernel, the following vulnerability has been resolved:

block: don't use submit_bio_noacct_nocheck in blk_zone_wplug_bio_work

Bios queued up in the zone write plug have already gone through all all
preparation in the submit_bio path, including the freeze protection.

Submitting them through submit_bio_noacct_nocheck duplicates the work
and can can cause deadlocks when freezing a queue with pending bio
write plugs.

Go straight to ->submit_bio or blk_mq_submit_bio to bypass the
superfluous extra freeze protection and checks.

https://git.kernel.org/stable/c/0fccb6773b1f4f992e435582cf8e050de421b678

https://git.kernel.org/stable/c/6ffae5d53f704d300cc73b06b4ea99e4507f7cf1

https://git.kernel.org/stable/c/cf625013d8741c01407bbb4a60c111b61b9fa69d