linux-cve-announce - CVE-2025-22120: ext4: goto right label 'out_mmap_sem' in ext4

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Message-ID: <2025041627-CVE-2025-22120-24ce@gregkh>
Date: Wed, 16 Apr 2025 16:13:31 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2025-22120: ext4: goto right label 'out_mmap_sem' in ext4_setattr()

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

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

ext4: goto right label 'out_mmap_sem' in ext4_setattr()

Otherwise, if ext4_inode_attach_jinode() fails, a hung task will
happen because filemap_invalidate_unlock() isn't called to unlock
mapping->invalidate_lock. Like this:

EXT4-fs error (device sda) in ext4_setattr:5557: Out of memory
INFO: task fsstress:374 blocked for more than 122 seconds.
      Not tainted 6.14.0-rc1-next-20250206-xfstests-dirty #726
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:fsstress state:D stack:0     pid:374   tgid:374   ppid:373
                                  task_flags:0x440140 flags:0x00000000
Call Trace:
 <TASK>
 __schedule+0x2c9/0x7f0
 schedule+0x27/0xa0
 schedule_preempt_disabled+0x15/0x30
 rwsem_down_read_slowpath+0x278/0x4c0
 down_read+0x59/0xb0
 page_cache_ra_unbounded+0x65/0x1b0
 filemap_get_pages+0x124/0x3e0
 filemap_read+0x114/0x3d0
 vfs_read+0x297/0x360
 ksys_read+0x6c/0xe0
 do_syscall_64+0x4b/0x110
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

The Linux kernel CVE team has assigned CVE-2025-22120 to this issue.


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

	Issue introduced in 6.13 with commit c7fc0366c65628fd69bfc310affec4918199aae2 and fixed in 6.14.2 with commit 32d872e3905746ff1048078256cb00f946b97d8a
	Issue introduced in 6.13 with commit c7fc0366c65628fd69bfc310affec4918199aae2 and fixed in 6.15-rc1 with commit 7e91ae31e2d264155dfd102101afc2de7bd74a64
	Issue introduced in 6.6.70 with commit 93011887013dbaa0e3a0285176ca89be153df651
	Issue introduced in 6.12.5 with commit b6ce2dbe984bcd7fb0c1df15b5e2fa57e1574a8e

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-2025-22120
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/inode.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/32d872e3905746ff1048078256cb00f946b97d8a
	https://git.kernel.org/stable/c/7e91ae31e2d264155dfd102101afc2de7bd74a64