------------[ cut here ]------------
WARNING: CPU: 0 PID: 4378 at fs/inode.c:389 inc_nlink+0x130/0x168 fs/inode.c:389
Modules linked in:
CPU: 0 PID: 4378 Comm: syz.1.75 Not tainted 5.15.180-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+0x130/0x168 fs/inode.c:389
lr : inc_nlink+0x130/0x168 fs/inode.c:389
sp : ffff8000208979e0
x29: ffff8000208979e0 x28: 1ffff00004112f62 x27: 1ffff00004112f5e
x26: 0000000000000000 x25: ffff0000d9957100 x24: ffff0000ddf787a0
x23: 1fffe0001bbef032 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000ddf78148 x19: ffff0000ddf78190 x18: ffff800020897680
x17: 0000000000000002 x16: ffff80000824f3a0 x15: 0000000000000004
x14: ffff8000172144c0 x13: dfff800000000000 x12: 0000000000080000
x11: 000000000001b817 x10: ffff800021dfb000 x9 : 000000000001b818
x8 : ffff8000089ed9d4 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff80000830626c
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x130/0x168 fs/inode.c:389
 v9fs_vfs_mkdir_dotl+0x538/0x6a0 fs/9p/vfs_inode_dotl.c:458
 vfs_mkdir+0x334/0x4e4 fs/namei.c:4065
 do_mkdirat+0x20c/0x610 fs/namei.c:4090
 __do_sys_mkdirat fs/namei.c:4105 [inline]
 __se_sys_mkdirat fs/namei.c:4103 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4103
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 1906
hardirqs last  enabled at (1905): [<ffff8000083c8998>] seqcount_lockdep_reader_access+0x208/0x2cc include/linux/seqlock.h:105
hardirqs last disabled at (1906): [<ffff800011b5cd78>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (1680): [<ffff8000081b70b8>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (1680): [<ffff8000081b70b8>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (1533): [<ffff8000081b7750>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (1533): [<ffff8000081b7750>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (1533): [<ffff8000081b7750>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (1533): [<ffff8000081b7750>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace 04bb008bcb5bde49 ]---