Description
In the Linux kernel, the following vulnerability has been resolved: md/raid5-cache: fix a deadlock in r5l_exit_log() Commit b13015af94cf ("md/raid5-cache: Clear conf->log after finishing work") introduce a new problem: // caller hold reconfig_mutex r5l_exit_log flush_work(&log->disable_writeback_work) r5c_disable_writeback_async wait_event /* * conf->log is not NULL, and mddev_trylock() * will fail, wait_event() can never pass. */ conf->log = NULL Fix this problem by setting 'config->log' to NULL before wake_up() as it used to be, so that wait_event() from r5c_disable_writeback_async() can exist. In the meantime, move forward md_unregister_thread() so that null-ptr-deref this commit fixed can still be fixed.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b13015af94cf405f73ff64ce0797269554020c37 to < ac9e103f282a7854f3274ef5ff0742fbbe8d7d6baffectedb13015af94cf405f73ff64ce0797269554020c37 to < 71cf23271f015a57038bdc4669952096f9fe5500affectedb13015af94cf405f73ff64ce0797269554020c37 to < c406984738215dc20ac2dc63e49d70f20797730eaffectedb13015af94cf405f73ff64ce0797269554020c37 to < a705b11b358dee677aad80630e7608b2d5f56691affected
Linux Linux
Default version status: affected
6.0affected0 to < 6.0unaffected6.1.53 to ≤ 6.1.*unaffected6.4.16 to ≤ 6.4.*unaffected6.5.3 to ≤ 6.5.*unaffected6.6 to ≤ *unaffected