erofs: read_super, device -> /dev/loop3
WARNING: CPU: 0 PID: 31094 at kernel/locking/lockdep.c:698 arch_local_save_flags syzkaller/managers/linux-4-19/kernel/./arch/x86/include/asm/paravirt.h:784 [inline]
WARNING: CPU: 0 PID: 31094 at kernel/locking/lockdep.c:698 look_up_lock_class syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:689 [inline]
WARNING: CPU: 0 PID: 31094 at kernel/locking/lockdep.c:698 register_lock_class+0x77b/0x11c0 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:748
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 31094 Comm: syz-executor.5 Not tainted 4.19.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef syzkaller/managers/linux-4-19/kernel/lib/dump_stack.c:118
 panic+0x26a/0x50e syzkaller/managers/linux-4-19/kernel/kernel/panic.c:186
 __warn.cold+0x20/0x5a syzkaller/managers/linux-4-19/kernel/kernel/panic.c:541
 report_bug+0x262/0x2b0 syzkaller/managers/linux-4-19/kernel/lib/bug.c:186
 fixup_bug syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/traps.c:178 [inline]
 fixup_bug syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 syzkaller/managers/linux-4-19/kernel/arch/x86/kernel/traps.c:296
erofs: options -> 
 invalid_op+0x14/0x20 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/entry_64.S:1038
RIP: 0010:look_up_lock_class syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:698 [inline]
RIP: 0010:register_lock_class+0x77b/0x11c0 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:748
Code: 8b 05 29 ff eb 0b 85 c0 0f 85 17 ff ff ff 48 c7 c6 80 1b 6a 88 48 c7 c7 40 19 6a 88 e8 03 27 a5 06 0f 0b e9 fd fe ff ff 0f 0b <0f> 0b e9 b3 fa ff ff 48 8d 70 01 48 69 c0 50 01 00 00 48 89 35 cc
erofs: root inode @ nid 36
RSP: 0018:ffff888053b5f600 EFLAGS: 00010083
RAX: dffffc0000000000 RBX: ffff88804b9e0860 RCX: 0000000000000000
RDX: 1ffff1100973c10f RSI: 0000000000000000 RDI: ffff88804b9e0878
RBP: 0000000000000000 R08: 0000000000000000 R09: 1ffff1100a76bec8
R10: ffffffff8d23b760 R11: 0000000000000000 R12: ffffffff8cdcc670
R13: ffffffff894bb9e0 R14: 1ffff1100a76bec8 R15: 0000000000000000
 __lock_acquire+0x17d/0x3ff0 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:3303
 lock_acquire+0x170/0x3c0 syzkaller/managers/linux-4-19/kernel/kernel/locking/lockdep.c:3907
 __raw_spin_lock_bh syzkaller/managers/linux-4-19/kernel/./include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x2f/0x40 syzkaller/managers/linux-4-19/kernel/kernel/locking/spinlock.c:168
 spin_lock_bh syzkaller/managers/linux-4-19/kernel/./include/linux/spinlock.h:334 [inline]
 release_sock+0x1b/0x1b0 syzkaller/managers/linux-4-19/kernel/net/core/sock.c:2879
 do_ipv6_setsockopt.constprop.0+0x504/0x3ed0 syzkaller/managers/linux-4-19/kernel/net/ipv6/ipv6_sockglue.c:916
 ipv6_setsockopt+0xb9/0x160 syzkaller/managers/linux-4-19/kernel/net/ipv6/ipv6_sockglue.c:940
 udpv6_setsockopt+0x5d/0xa0 syzkaller/managers/linux-4-19/kernel/net/ipv6/udp.c:1501
 __sys_setsockopt+0x14d/0x240 syzkaller/managers/linux-4-19/kernel/net/socket.c:1901
 __do_sys_setsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1912 [inline]
 __se_sys_setsockopt syzkaller/managers/linux-4-19/kernel/net/socket.c:1909 [inline]
 __x64_sys_setsockopt+0xba/0x150 syzkaller/managers/linux-4-19/kernel/net/socket.c:1909
 do_syscall_64+0xf9/0x620 syzkaller/managers/linux-4-19/kernel/arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465b09
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f32ada7c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09
RDX: 000000000000003b RSI: 0000000000000029 RDI: 0000000000000005
RBP: 00000000004b069f R08: 0000000000000008 R09: 0000000000000000
R10: 0000000020000480 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffd3ce5c21f R14: 00007f32ada7c300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..