CVE - CVE-2023-52836

CVE-ID
CVE-2023-52836	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: locking/ww_mutex/test: Fix potential workqueue corruption In some cases running with the test-ww_mutex code, I was seeing odd behavior where sometimes it seemed flush_workqueue was returning before all the work threads were finished. Often this would cause strange crashes as the mutexes would be freed while they were being used. Looking at the code, there is a lifetime problem as the controlling thread that spawns the work allocates the "struct stress" structures that are passed to the workqueue threads. Then when the workqueue threads are finished, they free the stress struct that was passed to them. Unfortunately the workqueue work_struct node is in the stress struct. Which means the work_struct is freed before the work thread returns and while flush_workqueue is waiting. It seems like a better idea to have the controlling thread both allocate and free the stress structures, so that we can be sure we don't corrupt the workqueue by freeing the structure prematurely. So this patch reworks the test to do so, and with this change I no longer see the early flush_workqueue returns.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/304a2c4aad0fff887ce493e4197bf9cbaf394479 URL:https://git.kernel.org/stable/c/304a2c4aad0fff887ce493e4197bf9cbaf394479 MISC:https://git.kernel.org/stable/c/9ed2d68b3925145f5f51c46559484881d6082f75 URL:https://git.kernel.org/stable/c/9ed2d68b3925145f5f51c46559484881d6082f75 MISC:https://git.kernel.org/stable/c/bccdd808902f8c677317cec47c306e42b93b849e URL:https://git.kernel.org/stable/c/bccdd808902f8c677317cec47c306e42b93b849e MISC:https://git.kernel.org/stable/c/c56df79d68677cf062da1b6e3b33e74299a92dfc URL:https://git.kernel.org/stable/c/c56df79d68677cf062da1b6e3b33e74299a92dfc MISC:https://git.kernel.org/stable/c/d4d37c9e6a4dbcca958dabd99216550525c7e389 URL:https://git.kernel.org/stable/c/d4d37c9e6a4dbcca958dabd99216550525c7e389 MISC:https://git.kernel.org/stable/c/d8267cabbe1bed15ccf8b0e684c528bf8eeef715 URL:https://git.kernel.org/stable/c/d8267cabbe1bed15ccf8b0e684c528bf8eeef715 MISC:https://git.kernel.org/stable/c/dcd85e3c929368076a7592b27f541e0da8b427f5 URL:https://git.kernel.org/stable/c/dcd85e3c929368076a7592b27f541e0da8b427f5 MISC:https://git.kernel.org/stable/c/e36407713163363e65566e7af0abe207d5f59a0c URL:https://git.kernel.org/stable/c/e36407713163363e65566e7af0abe207d5f59a0c MISC:https://git.kernel.org/stable/c/e89d0ed45a419c485bae999426ecf92697cbdda3 URL:https://git.kernel.org/stable/c/e89d0ed45a419c485bae999426ecf92697cbdda3
Assigning CNA
kernel.org
Date Record Created
20240521	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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