------------[ cut here ]------------
WARNING: CPU: 0 PID: 4630 at fs/inode.c:389 inc_nlink+0x128/0x154 fs/inode.c:389
Modules linked in:
CPU: 0 PID: 4630 Comm: syz.1.44 Not tainted 6.1.133-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : inc_nlink+0x128/0x154 fs/inode.c:389
lr : inc_nlink+0x128/0x154 fs/inode.c:389
sp : ffff800021a179c0
x29: ffff800021a179c0 x28: 1ffff00004342f66 x27: 1ffff00004342f62
x26: ffff700004342f50 x25: 0000000000000000 x24: ffff0000f5178bb0
x23: 1fffe0001ea2f0c4 x22: dfff800000000000 x21: 0000000000000007
x20: ffff0000f51785d8 x19: ffff0000f5178620 x18: ffff800021a17660
x17: ffff800018c59000 x16: ffff80000825c040 x15: ffff800018739f80
x14: ffff0000cf9a2638 x13: dfff800000000000 x12: 0000000000080000
x11: 0000000000006e35 x10: ffff8000223eb000 x9 : ffff800008aad25c
x8 : 0000000000006e36 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff80000831b478
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x128/0x154 fs/inode.c:389
 v9fs_vfs_mkdir_dotl+0x6cc/0x8b8 fs/9p/vfs_inode_dotl.c:445
 vfs_mkdir+0x334/0x4e4 fs/namei.c:4106
 do_mkdirat+0x220/0x510 fs/namei.c:4131
 __do_sys_mkdirat fs/namei.c:4146 [inline]
 __se_sys_mkdirat fs/namei.c:4144 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4144
 __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+0x58/0x168 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: 1198
hardirqs last  enabled at (1197): [<ffff8000084041d8>] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
hardirqs last  enabled at (1197): [<ffff8000084041d8>] ktime_get_coarse_real_ts64+0x114/0x244 kernel/time/timekeeping.c:2261
hardirqs last disabled at (1198): [<ffff80001232498c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1032): [<ffff800008030168>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1030): [<ffff800008030134>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---