Bug 2347757 (CVE-2022-49334)

Summary: CVE-2022-49334 kernel: mm/huge_memory: Fix xarray node memory leak
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-02-26 03:05:40 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mm/huge_memory: Fix xarray node memory leak

If xas_split_alloc() fails to allocate the necessary nodes to complete the
xarray entry split, it sets the xa_state to -ENOMEM, which xas_nomem()
then interprets as "Please allocate more memory", not as "Please free
any unnecessary memory" (which was the intended outcome).  It's confusing
to use xas_nomem() to free memory in this context, so call xas_destroy()
instead.
Comment 1 Avinash Hanwate 2025-02-26 13:40:12 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022639-CVE-2022-49334-7f6b@gregkh/T
Comment 4 Avinash Hanwate 2025-02-26 17:48:35 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022639-CVE-2022-49334-7f6b@gregkh/T