refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 429 at lib/refcount.c:87 refcount_dec_and_lock+0x180/0x1ec lib/refcount.c:146
Modules linked in:
CPU: 0 PID: 429 Comm: syz-executor.2 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : refcount_dec_and_lock+0x180/0x1ec lib/refcount.c:146
lr : refcount_dec_not_one lib/refcount.c:87 [inline]
lr : refcount_dec_and_lock+0x17c/0x1ec lib/refcount.c:146
sp : ffff800013abb8b0
x29: ffff800013abb8b0 x28: 0000000000000040 x27: ffff000124a76750
x26: ffff000124a723a8 x25: 00000000ffffffff x24: 0000000000000000
x23: 00000000c0000000 x22: 0000000000000000 x21: ffff80000d5eb4a0
x20: ffff00012224db20 x19: ffff80000d8c8000 x18: 000000000000018d
x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff0000c8a61a80
x14: 0000000000000000 x13: 00000000ffffffff x12: 0000000000040000
x11: 0000000000003423 x10: ffff800019f39000 x9 : ae98d0865355cb00
x8 : ae98d0865355cb00 x7 : ffff800008161d1c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000007 x1 : 0000000100000000 x0 : 0000000000000000
Call trace:
 refcount_dec_and_lock+0x180/0x1ec lib/refcount.c:146
 nilfs_put_root+0x30/0x80 fs/nilfs2/the_nilfs.c:797
 nilfs_clear_inode+0x108/0x140 fs/nilfs2/inode.c:895
 nilfs_evict_inode+0x110/0x1cc fs/nilfs2/inode.c:924
 evict+0xec/0x334 fs/inode.c:665
 iput_final fs/inode.c:1748 [inline]
 iput+0x2c4/0x324 fs/inode.c:1774
 nilfs_new_inode+0x2c0/0x378
 nilfs_create+0x74/0x17c fs/nilfs2/namei.c:85
 lookup_open fs/namei.c:3413 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x804/0x11c4 fs/namei.c:3688
 do_filp_open+0xdc/0x1b8 fs/namei.c:3718
 do_sys_openat2+0xb8/0x22c fs/open.c:1313
 do_sys_open fs/open.c:1329 [inline]
 __do_sys_openat fs/open.c:1345 [inline]
 __se_sys_openat fs/open.c:1340 [inline]
 __arm64_sys_openat+0xb0/0xe0 fs/open.c:1340
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
 el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
irq event stamp: 3200
hardirqs last  enabled at (3199): [<ffff800008161dac>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (3199): [<ffff800008161dac>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942
hardirqs last disabled at (3200): [<ffff80000bfb5fbc>] el1_dbg+0x24/0x5c arch/arm64/kernel/entry-common.c:404
softirqs last  enabled at (3112): [<ffff80000801c33c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (3110): [<ffff80000801c308>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---