Bug 2320463 (CVE-2024-49956)

Summary: CVE-2024-49956 kernel: gfs2: fix double destroy_workqueue error
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2320806    
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Description OSIDB Bzimport 2024-10-21 19:03:41 UTC 
In the Linux kernel, the following vulnerability has been resolved:

gfs2: fix double destroy_workqueue error

When gfs2_fill_super() fails, destroy_workqueue() is called within
gfs2_gl_hash_clear(), and the subsequent code path calls
destroy_workqueue() on the same work queue again.

This issue can be fixed by setting the work queue pointer to NULL after
the first destroy_workqueue() call and checking for a NULL pointer
before attempting to destroy the work queue again.
Comment 1 Robb Gatica 2024-10-21 22:26:21 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102130-CVE-2024-49956-5278@gregkh/T