CVE-2023-52848

published 2024-05-21

CVE-2023-52848: In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to drop meta_inode's page cache in f2fs_put_super() syzbot reports a kernel bug…

Priority P4 19 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

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

f2fs: fix to drop meta_inode's page cache in f2fs_put_super()

syzbot reports a kernel bug as below:

F2FS-fs (loop1): detect filesystem reference count leak during umount, type: 10, count: 1
kernel BUG at fs/f2fs/super.c:1639!
CPU: 0 PID: 15451 Comm: syz-executor.1 Not tainted 6.5.0-syzkaller-09338-ge0152e7481c6 #0
RIP: 0010:f2fs_put_super+0xce1/0xed0 fs/f2fs/super.c:1639
Call Trace:
generic_shutdown_super+0x161/0x3c0 fs/super.c:693
kill_block_super+0x3b/0x70 fs/super.c:1646
kill_f2fs_super+0x2b7/0x3d0 fs/f2fs/super.c:4879
deactivate_locked_super+0x9a/0x170 fs/super.c:481
deactivate_super+0xde/0x100 fs/super.c:514
cleanup_mnt+0x222/0x3d0 fs/namespace.c:1254
task_work_run+0x14d/0x240 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296
do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd

In f2fs_put_super(), it tries to do sanity check on dirty and IO
reference count of f2fs, once there is any reference count leak,
it will trigger panic.

The root case is, during f2fs_put_super(), if there is any IO error
in f2fs_wait_on_all_pages(), we missed to truncate meta_inode's page
cache later, result in panic, fix this case.

Affected

11 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 6.6.8-1 (forky)	linux 6.6.8-1 (forky)
linux	linux	—	—
linux	linux	—	—
linux	linux	>= 20872584b8c0b006c007da9588a272c9e28d2e18 < eb42e1862aa7934c2c21890097ce4993c5e0d192	eb42e1862aa7934c2c21890097ce4993c5e0d192
linux	linux	>= 20872584b8c0b006c007da9588a272c9e28d2e18 < 10b2a6c0dade67b5a2b2d17fb75c457ea1985fad	10b2a6c0dade67b5a2b2d17fb75c457ea1985fad
linux	linux	>= 20872584b8c0b006c007da9588a272c9e28d2e18 < a4639380bbe66172df329f8b54aa7d2e943f0f64	a4639380bbe66172df329f8b54aa7d2e943f0f64
linux	linux	>= 6.4.16 < 6.5	6.5
linux	linux_kernel	>= 0 < 6.6.8-1	6.6.8-1
linux	linux_kernel	>= 0 < 6.6.8-1	6.6.8-1
linux	linux_kernel	>= 6.4.16 < 6.5.12	6.5.12
linux	linux_kernel	>= 6.6 < 6.6.2	6.6.2

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 LOW

vendor_redhat 5.5 MEDIUM

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