Bug 2345213 (CVE-2025-21699)

Summary: CVE-2025-21699 kernel: gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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OS: Linux   
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Description OSIDB Bzimport 2025-02-12 14:04:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag

Truncate an inode's address space when flipping the GFS2_DIF_JDATA flag:
depending on that flag, the pages in the address space will either use
buffer heads or iomap_folio_state structs, and we cannot mix the two.
Comment 1 Robb Gatica 2025-02-12 20:47:47 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025021202-CVE-2025-21699-029f@gregkh/T