CVE-2024-47690

f2fs: get rid of online repaire on corrupted directory

State: Published
Severity: 7.8 High
Published: Oct 21, 2024
Updated: Aug 5, 2026
Reserved: Sep 30, 2024

Description

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

f2fs: get rid of online repaire on corrupted directory

syzbot reports a f2fs bug as below:

kernel BUG at fs/f2fs/inode.c:896! RIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896 Call Trace: evict+0x532/0x950 fs/inode.c:704 dispose_list fs/inode.c:747 [inline] evict_inodes+0x5f9/0x690 fs/inode.c:797 generic_shutdown_super+0x9d/0x2d0 fs/super.c:627 kill_block_super+0x44/0x90 fs/super.c:1696 kill_f2fs_super+0x344/0x690 fs/f2fs/super.c:4898 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:228 ptrace_notify+0x2d2/0x380 kernel/signal.c:2402 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x279/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0010:f2fs_evict_inode+0x1598/0x15c0 fs/f2fs/inode.c:896

Online repaire on corrupted directory in f2fs_lookup() can generate dirty data/meta while racing w/ readonly remount, it may leave dirty inode after filesystem becomes readonly, however, checkpoint() will skips flushing dirty inode in a state of readonly mode, result in above panic.

Let's get rid of online repaire in f2fs_lookup(), and leave the work to fsck.f2fs.

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	510022a85839a8409d1e6a519bb86ce71a84f30a to before e8d64f598eeb079c42a52deaa3a91312c736a49dAffected 510022a85839a8409d1e6a519bb86ce71a84f30a to before f4746f2d79507f65cfbde11d3c39ee8338aa50afAffected 510022a85839a8409d1e6a519bb86ce71a84f30a to before f9ce2f550d53d044ecfb5ce996406cf42cd6b84dAffected 510022a85839a8409d1e6a519bb86ce71a84f30a to before 8be95cd607478d85fa4626e86f811e785905bcbfAffected 510022a85839a8409d1e6a519bb86ce71a84f30a to before bcefd0b0611f35b560d0a7281d87529fbe7a1e32Affected 510022a85839a8409d1e6a519bb86ce71a84f30a to before 884ee6dc85b959bc152f15bca80c30f06069e6c4Affected
LinuxLinux	4.1Affected before 4.1Not affected 5.15.168 through 5.15.Not affected 6.1.113 through 6.1.Not affected 6.6.54 through 6.6.Not affected 6.10.13 through 6.10.Not affected 6.11.2 through 6.11.*Not affected 6.12 and laterNot affected

Product

Versions

LinuxLinux

510022a85839a8409d1e6a519bb86ce71a84f30a to before e8d64f598eeb079c42a52deaa3a91312c736a49dAffected
510022a85839a8409d1e6a519bb86ce71a84f30a to before f4746f2d79507f65cfbde11d3c39ee8338aa50afAffected
510022a85839a8409d1e6a519bb86ce71a84f30a to before f9ce2f550d53d044ecfb5ce996406cf42cd6b84dAffected
510022a85839a8409d1e6a519bb86ce71a84f30a to before 8be95cd607478d85fa4626e86f811e785905bcbfAffected
510022a85839a8409d1e6a519bb86ce71a84f30a to before bcefd0b0611f35b560d0a7281d87529fbe7a1e32Affected
510022a85839a8409d1e6a519bb86ce71a84f30a to before 884ee6dc85b959bc152f15bca80c30f06069e6c4Affected

LinuxLinux

4.1Affected
before 4.1Not affected
5.15.168 through 5.15.*Not affected
6.1.113 through 6.1.*Not affected
6.6.54 through 6.6.*Not affected
6.10.13 through 6.10.*Not affected
6.11.2 through 6.11.*Not affected
6.12 and laterNot affected

References

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