Bug 2383424 (CVE-2025-38411)

Summary: CVE-2025-38411 kernel: netfs: Fix double put of request
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 2025-07-25 14:04:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfs: Fix double put of request

If a netfs request finishes during the pause loop, it will have the ref
that belongs to the IN_PROGRESS flag removed at that point - however, if it
then goes to the final wait loop, that will *also* put the ref because it
sees that the IN_PROGRESS flag is clear and incorrectly assumes that this
happened when it called the collector.

In fact, since IN_PROGRESS is clear, we shouldn't call the collector again
since it's done all the cleanup, such as calling ->ki_complete().

Fix this by making netfs_collect_in_app() just return, indicating that
we're done if IN_PROGRESS is removed.
Comment 1 Jon Moroney 2025-07-25 18:44:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025072521-CVE-2025-38411-0ca7@gregkh/T