Bug 2347650 (CVE-2022-49316)

Summary: CVE-2022-49316 kernel: NFSv4: Don't hold the layoutget locks across multiple RPC calls
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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Description OSIDB Bzimport 2025-02-26 03:01:46 UTC 
In the Linux kernel, the following vulnerability has been resolved:

NFSv4: Don't hold the layoutget locks across multiple RPC calls

When doing layoutget as part of the open() compound, we have to be
careful to release the layout locks before we can call any further RPC
calls, such as setattr(). The reason is that those calls could trigger
a recall, which could deadlock.
Comment 1 Mauro Matteo Cascella 2025-02-26 12:59:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022636-CVE-2022-49316-3e10@gregkh/T