linux-cve-announce - CVE-2025-40361: fs: ext4: change GFP_KERNEL to GFP

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Message-ID: <2025121644-CVE-2025-40361-50ca@gregkh>
Date: Tue, 16 Dec 2025 14:40:47 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-40361: fs: ext4: change GFP_KERNEL to GFP_NOFS to avoid deadlock

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

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

fs: ext4: change GFP_KERNEL to GFP_NOFS to avoid deadlock

The parent function ext4_xattr_inode_lookup_create already uses GFP_NOFS for memory alloction, so the function ext4_xattr_inode_cache_find should use same gfp_flag.

The Linux kernel CVE team has assigned CVE-2025-40361 to this issue.


Affected and fixed versions
===========================

	Fixed in 5.10.247 with commit 5e6b27f4e68682aa3db9f83ca04adef89903159b
	Fixed in 5.15.197 with commit bb7d0d13c6e1f061464d1c425b08348a4e0c235d
	Fixed in 6.1.159 with commit add8458cac0b33a5e7a6b98457b38baea9600859
	Fixed in 6.6.117 with commit 199ab7b43c5ef7d384f6a08e786e107b3509acda
	Fixed in 6.12.58 with commit 238f7a7356c33a9797a6297c6fdfd87f113b2325
	Fixed in 6.17.8 with commit 009127b0fc013aed193961686c28c2b541a5b2f3
	Fixed in 6.18 with commit 1534f72dc2a11ded38b0e0268fbcc0ca24e9fd4a

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-40361
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	fs/ext4/xattr.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/5e6b27f4e68682aa3db9f83ca04adef89903159b
	https://git.kernel.org/stable/c/bb7d0d13c6e1f061464d1c425b08348a4e0c235d
	https://git.kernel.org/stable/c/add8458cac0b33a5e7a6b98457b38baea9600859
	https://git.kernel.org/stable/c/199ab7b43c5ef7d384f6a08e786e107b3509acda
	https://git.kernel.org/stable/c/238f7a7356c33a9797a6297c6fdfd87f113b2325
	https://git.kernel.org/stable/c/009127b0fc013aed193961686c28c2b541a5b2f3
	https://git.kernel.org/stable/c/1534f72dc2a11ded38b0e0268fbcc0ca24e9fd4a