Bug 2396410 (CVE-2022-50377)

Summary: CVE-2022-50377 kernel: ext4: check and assert if marking an no_delete evicting inode dirty
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-18 14:03:28 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ext4: check and assert if marking an no_delete evicting inode dirty

In ext4_evict_inode(), if we evicting an inode in the 'no_delete' path,
it cannot be raced by another mark_inode_dirty(). If it happens,
someone else may accidentally dirty it without holding inode refcount
and probably cause use-after-free issues in the writeback procedure.
It's indiscoverable and hard to debug, so add an WARN_ON_ONCE() to
check and detect this issue in advance.
Comment 1 Keith Grant 2025-09-18 15:01:31 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091851-CVE-2022-50377-f43b@gregkh/T