Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b13015af94cf405f73ff64ce0797269554020c37 before ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b; affected b13015af94cf405f73ff64ce0797269554020c37 before 71cf23271f015a57038bdc4669952096f9fe5500; affected b13015af94cf405f73ff64ce0797269554020c37 before c406984738215dc20ac2dc63e49d70f20797730e; affected b13015af94cf405f73ff64ce0797269554020c37 before a705b11b358dee677aad80630e7608b2d5f56691 |
| Linux / Linux | affected 6.0; unaffected 0 before 6.0; unaffected 6.1.53 through 6.1.*; unaffected 6.4.16 through 6.4.*; unaffected 6.5.3 through 6.5.*; unaffected 6.6 through * |
CWE
No CWE identifiers supplied.