CVE-2023-54124

f2fs: fix to drop all dirty pages during umount() if cp_error is set

State: Published
Severity: 7.8 High
Published: Dec 24, 2025
Updated: Aug 5, 2026
Reserved: Dec 24, 2025

Description

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

f2fs: fix to drop all dirty pages during umount() if cp_error is set

xfstest generic/361 reports a bug as below:

f2fs_bug_on(sbi, sbi->fsync_node_num);

kernel BUG at fs/f2fs/super.c:1627! RIP: 0010:f2fs_put_super+0x3a8/0x3b0 Call Trace: generic_shutdown_super+0x8c/0x1b0 kill_block_super+0x2b/0x60 kill_f2fs_super+0x87/0x110 deactivate_locked_super+0x39/0x80 deactivate_super+0x46/0x50 cleanup_mnt+0x109/0x170 __cleanup_mnt+0x16/0x20 task_work_run+0x65/0xa0 exit_to_user_mode_prepare+0x175/0x190 syscall_exit_to_user_mode+0x25/0x50 do_syscall_64+0x4c/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc

During umount(), if cp_error is set, f2fs_wait_on_all_pages() should not stop waiting all F2FS_WB_CP_DATA pages to be writebacked, otherwise, fsync_node_num can be non-zero after f2fs_wait_on_all_pages() causing this bug.

In this case, to avoid deadloop in f2fs_wait_on_all_pages(), it needs to drop all dirty pages rather than redirtying them.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	af697c0f5c5b8798832e651baf23460d588393de to before 92575f05a32dafb16348bfa5e62478118a9be069Affected af697c0f5c5b8798832e651baf23460d588393de to before 4ceedc2f8bdffb82e40b7d1bb912304f8e157cb1Affected af697c0f5c5b8798832e651baf23460d588393de to before ad87bd313f70b51e48019d5ce2d02d73152356b3Affected af697c0f5c5b8798832e651baf23460d588393de to before d8f4ad5f3979dbd8e6251259562f12472717883aAffected af697c0f5c5b8798832e651baf23460d588393de to before 7741ddc882a0c806a6508ba8203c55a779db7a21Affected af697c0f5c5b8798832e651baf23460d588393de to before 82c3d6e9db41cbd3af1d4f90bdb441740b5fad10Affected af697c0f5c5b8798832e651baf23460d588393de to before c9b3649a934d131151111354bcbb638076f03a30Affected
LinuxLinux	4.19Affected before 4.19Not affected 4.19.284 through 4.19.Not affected 5.4.244 through 5.4.Not affected 5.10.181 through 5.10.Not affected 5.15.113 through 5.15.Not affected 6.1.30 through 6.1.Not affected 6.3.4 through 6.3.Not affected 6.4 and laterNot affected

Product

Versions

LinuxLinux

af697c0f5c5b8798832e651baf23460d588393de to before 92575f05a32dafb16348bfa5e62478118a9be069Affected
af697c0f5c5b8798832e651baf23460d588393de to before 4ceedc2f8bdffb82e40b7d1bb912304f8e157cb1Affected
af697c0f5c5b8798832e651baf23460d588393de to before ad87bd313f70b51e48019d5ce2d02d73152356b3Affected
af697c0f5c5b8798832e651baf23460d588393de to before d8f4ad5f3979dbd8e6251259562f12472717883aAffected
af697c0f5c5b8798832e651baf23460d588393de to before 7741ddc882a0c806a6508ba8203c55a779db7a21Affected
af697c0f5c5b8798832e651baf23460d588393de to before 82c3d6e9db41cbd3af1d4f90bdb441740b5fad10Affected
af697c0f5c5b8798832e651baf23460d588393de to before c9b3649a934d131151111354bcbb638076f03a30Affected

LinuxLinux

4.19Affected
before 4.19Not affected
4.19.284 through 4.19.*Not affected
5.4.244 through 5.4.*Not affected
5.10.181 through 5.10.*Not affected
5.15.113 through 5.15.*Not affected
6.1.30 through 6.1.*Not affected
6.3.4 through 6.3.*Not affected
6.4 and laterNot affected

References

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