Bug 2320436 (CVE-2024-49877)

Summary: CVE-2024-49877 kernel: ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate
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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OS: Linux   
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Bug Depends On: 2320752    
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Description OSIDB Bzimport 2024-10-21 19:01:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ocfs2: fix possible null-ptr-deref in ocfs2_set_buffer_uptodate

When doing cleanup, if flags without OCFS2_BH_READAHEAD, it may trigger
NULL pointer dereference in the following ocfs2_set_buffer_uptodate() if
bh is NULL.
Comment 1 Robb Gatica 2024-10-21 21:46:38 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102115-CVE-2024-49877-038a@gregkh/T