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CVE-2023-53848

md/raid5-cache: fix a deadlock in r5l_exit_log()

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version b13015af94cf405f73ff64ce0797269554020c37
Version < ac9e103f282a7854f3274ef5ff0742fbbe8d7d6b
Status affected
Version b13015af94cf405f73ff64ce0797269554020c37
Version < 71cf23271f015a57038bdc4669952096f9fe5500
Status affected
Version b13015af94cf405f73ff64ce0797269554020c37
Version < c406984738215dc20ac2dc63e49d70f20797730e
Status affected
Version b13015af94cf405f73ff64ce0797269554020c37
Version < a705b11b358dee677aad80630e7608b2d5f56691
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.0
Status affected
Version 0
Version < 6.0
Status unaffected
Version <= 6.1.*
Version 6.1.53
Status unaffected
Version <= 6.4.*
Version 6.4.16
Status unaffected
Version <= 6.5.*
Version 6.5.3
Status unaffected
Version <= *
Version 6.6
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.02% 0.061
CVSS Metriken
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