syzbot

F2FS-fs (loop0): Found nat_bits in checkpoint
F2FS-fs (loop0): Try to recover 1th superblock, ret: 0
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4
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WARNING: CPU: 1 PID: 4457 at fs/inode.c:332 drop_nlink+0xe4/0x138 fs/inode.c:332
Modules linked in:
CPU: 1 PID: 4457 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : drop_nlink+0xe4/0x138 fs/inode.c:332
lr : drop_nlink+0xe4/0x138 fs/inode.c:332
sp : ffff8000208c77a0
x29: ffff8000208c77a0 x28: 0000000000000000 x27: ffff0000ea54a380
x26: dfff800000000000 x25: ffff0000ea5491c0 x24: 0000000000008000
x23: 1fffe0001d4a9479 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000ea54a3c8 x19: ffff0000ea54a380 x18: ffff800011a5bd40
x17: ffff800018184000 x16: ffff8000082cf240 x15: ffff800017c65000
x14: ffff0000d1ad2658 x13: ffff0000d1ad2720 x12: 0000000000ff0100
x11: ff008000089fdec0 x10: 0000000000000000 x9 : ffff8000089fdec0
x8 : ffff0000d1ad1bc0 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000183405c0 x4 : 0000000000000002 x3 : ffff8000082cf434
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 drop_nlink+0xe4/0x138 fs/inode.c:332
 f2fs_i_links_write fs/f2fs/f2fs.h:3049 [inline]
 f2fs_rename fs/f2fs/namei.c:992 [inline]
 f2fs_rename2+0x11d4/0x1bd4 fs/f2fs/namei.c:1265
 vfs_rename+0x954/0xdcc fs/namei.c:4882
 do_renameat2+0x738/0xa54 fs/namei.c:5035
 __do_sys_renameat2 fs/namei.c:5068 [inline]
 __se_sys_renameat2 fs/namei.c:5065 [inline]
 __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5065
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 272836
hardirqs last  enabled at (272835): [<ffff8000083c0b24>] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
hardirqs last  enabled at (272835): [<ffff8000083c0b24>] ktime_get_coarse_real_ts64+0x114/0x244 kernel/time/timekeeping.c:2261
hardirqs last disabled at (272836): [<ffff8000118fa220>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (272608): [<ffff8000080309e0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (272606): [<ffff8000080309ac>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---