CVE-2025-71065

Technical Description

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

f2fs: fix to avoid potential deadlock

As Jiaming Zhang and syzbot reported, there is potential deadlock in

f2fs as below:

Chain exists of:

&sbi->cp_rwsem --> fs_reclaim --> sb_internal#2

Possible unsafe locking scenario:

CPU0 CPU1

---- ----

rlock(sb_internal#2);

lock(fs_reclaim);

lock(sb_internal#2);

rlock(&sbi->cp_rwsem);

*** DEADLOCK ***

3 locks held by kswapd0/73:

#0: ffffffff8e247a40 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat mm/vmscan.c:7015 [inline]

#0: ffffffff8e247a40 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x951/0x2800 mm/vmscan.c:7389

#1: ffff8880118400e0 (&type->s_umount_key#50){.+.+}-{4:4}, at: super_trylock_shared fs/super.c:562 [inline]

#1: ffff8880118400e0 (&type->s_umount_key#50){.+.+}-{4:4}, at: super_cache_scan+0x91/0x4b0 fs/super.c:197

#2: ffff888011840610 (sb_internal#2

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