------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS)
WARNING: CPU: 0 PID: 7661 at kernel/locking/lockdep.c:3673 __lock_acquire+0x1887/0x3fb0 kernel/locking/lockdep.c:3673
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7661 Comm: syz-executor.2 Not tainted 5.1.0-rc4+ #163
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+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x65c kernel/panic.c:214
 __warn.cold+0x20/0x45 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:__lock_acquire+0x1887/0x3fb0 kernel/locking/lockdep.c:3673
Code: d2 0f 85 7b 1f 00 00 44 8b 3d e9 06 07 08 45 85 ff 0f 85 20 f3 ff ff 48 c7 c6 80 3f 6b 87 48 c7 c7 c0 15 6b 87 e8 07 e2 eb ff <0f> 0b e9 09 f3 ff ff 0f 0b e9 41 f1 ff ff 8b 1d 45 30 05 09 85 db
RSP: 0018:ffff8880992779e8 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815affc6 RDI: ffffed101324ef2f
RBP: ffff888099277b20 R08: ffff88809844c2c0 R09: fffffbfff11335f5
R10: fffffbfff11335f4 R11: ffffffff8899afa3 R12: 0000000066c4c36e
R13: 0000000000000003 R14: 00000000000c036e R15: 0000000000000000
 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:4211
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:144
 spin_lock include/linux/spinlock.h:329 [inline]
 __queue_work+0x23d/0x1180 kernel/workqueue.c:1449
 queue_work_on+0x192/0x200 kernel/workqueue.c:1518
 queue_work include/linux/workqueue.h:494 [inline]
 sock_diag_broadcast_destroy+0x13e/0x1a0 net/core/sock_diag.c:160
 __sk_free+0x21b/0x300 net/core/sock.c:1743
 sk_free+0x42/0x50 net/core/sock.c:1756
 sock_put include/net/sock.h:1714 [inline]
 tcp_close+0xbc3/0x10c0 net/ipv4/tcp.c:2516
 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428
 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:473
 __sock_release+0xd3/0x2b0 net/socket.c:599
 sock_close+0x1b/0x30 net/socket.c:1247
 __fput+0x2e5/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4129c0
Code: 01 f0 ff ff 0f 83 10 1b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d cd 38 64 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 e4 1a 00 00 c3 48 83 ec 08 e8 0a fc ff ff
RSP: 002b:00007ffcbfba72e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007ffcbfba7310 RCX: 00000000004129c0
RDX: 0000000000000010 RSI: 00007ffcbfba7790 RDI: 0000000000000003
RBP: 000000000070fcc0 R08: 0000000000006000 R09: 0000000000004000
R10: 00007ffcbfba7410 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000029 R15: 000000000070fcc0
Kernel Offset: disabled
Rebooting in 86400 seconds..