Bug 2379176 (CVE-2025-38269)

Summary: CVE-2025-38269 kernel: btrfs: exit after state insertion failure at btrfs_convert_extent_bit()
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 2025-07-10 08:01:42 UTC 
In the Linux kernel, the following vulnerability has been resolved:

btrfs: exit after state insertion failure at btrfs_convert_extent_bit()

If insert_state() state failed it returns an error pointer and we call
extent_io_tree_panic() which will trigger a BUG() call. However if
CONFIG_BUG is disabled, which is an uncommon and exotic scenario, then
we fallthrough and call cache_state() which will dereference the error
pointer, resulting in an invalid memory access.

So jump to the 'out' label after calling extent_io_tree_panic(), it also
makes the code more clear besides dealing with the exotic scenario where
CONFIG_BUG is disabled.
Comment 1 Avinash Hanwate 2025-07-11 12:25:33 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025071007-CVE-2025-38269-fb65@gregkh/T