CVE-2025-38357

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

fuse: fix runtime warning on truncate_folio_batch_exceptionals()

The WARN_ON_ONCE is introduced on truncate_folio_batch_exceptionals() to

capture whether the filesystem has removed all DAX entries or not.

And the fix has been applied on the filesystem xfs and ext4 by the commit

0e2f80afcfa6 ("fs/dax: ensure all pages are idle prior to filesystem

unmount").

Apply the missed fix on filesystem fuse to fix the runtime warning:

[ 2.011450] ------------[ cut here ]------------

[ 2.011873] WARNING: CPU: 0 PID: 145 at mm/truncate.c:89 truncate_folio_batch_exceptionals+0x272/0x2b0

[ 2.012468] Modules linked in:

[ 2.012718] CPU: 0 UID: 1000 PID: 145 Comm: weston Not tainted 6.16.0-rc2-WSL2-STABLE #2 PREEMPT(undef)

[ 2.013292] RIP: 0010:truncate_folio_batch_exceptionals+0x272/0x2b0

[ 2.013704] Code: 48 63 d0 41 29 c5 48 8d 1c d5 00 00 00 00 4e 8d 6c 2a 01 49 c1 e5 03 eb 09 48 83 c3 08 49 39 dd 74 83 41 f6 4

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References