CVE-2024-26671

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a blk-mq fix for an IO hang from sbitmap wakeup race. In blk mq mark tag wait(), add wait queue() may be re-ordered with the following blk mq get driver tag() in case of getting driver tag failure. Then in sbitmap queue wake up(), waitqueue active() may not observe the added waiter in blk mq mark tag wait() and wake up nothing, meantime blk mq mark tag wait() can't get driver tag successfully. This issue can be reproduced by running a specific test in loop, and fio hang can be observed in < 30min when running it on a test VM in a laptop.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.