------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(depth <= 0)
WARNING: CPU: 0 PID: 7167 at kernel/locking/lockdep.c:3961 __lock_release kernel/locking/lockdep.c:3961 [inline]
WARNING: CPU: 0 PID: 7167 at kernel/locking/lockdep.c:3961 lock_release+0x613/0x8b0 kernel/locking/lockdep.c:4230
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7167 Comm: syz-executor.2 Not tainted 5.1.0-rc6+ #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x113/0x167 lib/dump_stack.c:113
 panic+0x212/0x41d kernel/panic.c:214
 __warn.cold.8+0x1b/0x36 kernel/panic.c:571
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:__lock_release kernel/locking/lockdep.c:3961 [inline]
RIP: 0010:lock_release+0x613/0x8b0 kernel/locking/lockdep.c:4230
Code: 03 38 d0 7c 08 84 d2 0f 85 a3 02 00 00 8b 35 48 dc 83 07 85 f6 75 15 48 c7 c6 a0 af ea 86 48 c7 c7 00 7f ea 86 e8 a0 f5 ec ff <0f> 0b 48 8b 95 70 ff ff ff 4c 89 ee 4c 89 f7 e8 69 56 ff ff e9 df
RSP: 0018:ffff88809011f6d8 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 1ffff11012023edf RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: ffff88809011f780 R08: fffffbfff10328c5 R09: fffffbfff10328c4
R10: fffffbfff10328c4 R11: ffffffff88194623 R12: ffffffff89cc7a20
R13: ffff88808fe16200 R14: ffff888090418080 R15: ffff8880904188f8
 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline]
 _raw_spin_unlock+0x1a/0x50 kernel/locking/spinlock.c:176
 spin_unlock include/linux/spinlock.h:369 [inline]
 nfs_get_client+0xaca/0x1090 fs/nfs/client.c:412
 nfs_init_server+0x22c/0xd30 fs/nfs/client.c:674
 nfs_create_server+0xfb/0x5b0 fs/nfs/client.c:961
 nfs_try_mount+0x15c/0x790 fs/nfs/super.c:1882
 nfs_fs_mount+0x13f3/0x2230 fs/nfs/super.c:2718
 legacy_get_tree+0xeb/0x1d0 fs/fs_context.c:584
 vfs_get_tree+0x102/0x400 fs/super.c:1481
 do_new_mount fs/namespace.c:2622 [inline]
 do_mount+0x10f7/0x2990 fs/namespace.c:2942
 ksys_mount+0xba/0xe0 fs/namespace.c:3151
 __do_sys_mount fs/namespace.c:3165 [inline]
 __se_sys_mount fs/namespace.c:3162 [inline]
 __x64_sys_mount+0xb9/0x150 fs/namespace.c:3162
 do_syscall_64+0xd6/0x4e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458da9
Code: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa14cdc6c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9
RDX: 0000000020fb5ffc RSI: 0000000020343ff8 RDI: 0000000000000000
RBP: 000000000073c040 R08: 000000002000a000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa14cdc76d4
R13: 00000000004c4d9b R14: 00000000004d8a08 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..