------------[ cut here ]------------
WARNING: CPU: 0 PID: 4965 at fs/inode.c:389 inc_nlink+0x128/0x154 fs/inode.c:389
Modules linked in:
CPU: 0 PID: 4965 Comm: syz.5.75 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (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 : ffff8000211b7a40
x29: ffff8000211b7a40 x28: dfff800000000000 x27: ffff700004236f54
x26: 1fffe0001edc3005 x25: ffff0000e05a51a0 x24: ffff0000f6e185d8
x23: 1fffe0001edc3009 x22: dfff800000000000 x21: 0000000000000007
x20: ffff0000f6e18000 x19: ffff0000f6e18048 x18: ffff800011abbcc0
x17: ffff8000181fa000 x16: ffff8000082e7b1c x15: ffff800017cdafc0
x14: ffff0000ce9da658 x13: ffff0000ce9da6d0 x12: 0000000000080000
x11: 00000000000099df x10: ffff800021a89000 x9 : ffff8000089fc1d8
x8 : 00000000000099e0 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff8000082e7c30
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 inc_nlink+0x128/0x154 fs/inode.c:389
 v9fs_vfs_mkdir_dotl+0x518/0x680 fs/9p/vfs_inode_dotl.c:445
 vfs_mkdir+0x314/0x4d4 fs/namei.c:4106
 do_mkdirat+0x1b4/0x3e0 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+0x58/0x138 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: 1314
hardirqs last  enabled at (1313): [<ffff8000083bf2e4>] seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
hardirqs last  enabled at (1313): [<ffff8000083bf2e4>] ktime_get_coarse_real_ts64+0x114/0x244 kernel/time/timekeeping.c:2261
hardirqs last disabled at (1314): [<ffff8000119594a8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (1114): [<ffff80000803092c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1112): [<ffff8000080308f8>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---