TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
netlink: 60 bytes leftover after parsing attributes in process `syz-executor.5'.
------------[ cut here ]------------
kernel BUG at fs/f2fs/node.c:2780!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 8020 Comm: syz-executor.1 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
task: ffff888096b74580 task.stack: ffff888096aa0000
RIP: 0010:destroy_node_manager+0x4f4/0x780 fs/f2fs/node.c:2780
RSP: 0018:ffff888096aa78c0 EFLAGS: 00010297
RAX: ffff888096b74580 RBX: ffff8880b0641c30 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880b0641c54
RBP: ffff8880b0641b40 R08: ffffffff8b9cfef0 R09: 000000000004076e
R10: ffff888096b74e30 R11: ffff888096b74580 R12: ffff8880b0641c58
caif:caif_disconnect_client(): nothing to disconnect
R13: ffffed10125c65d6 R14: ffff8880b0641c30 R15: ffff888092e32e80
FS:  000055555590c400(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd5e52c91b8 CR3: 00000000af417000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
caif:caif_disconnect_client(): nothing to disconnect
Call Trace:
 f2fs_put_super+0x3e1/0x840 fs/f2fs/super.c:835
 generic_shutdown_super+0x144/0x370 fs/super.c:446
 kill_block_super+0x95/0xe0 fs/super.c:1161
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 deactivate_super+0x7f/0xa0 fs/super.c:350
 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f6f21a55567
RSP: 002b:00007ffda1488bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6f21a55567
RDX: 00007ffda1488c8a RSI: 000000000000000a RDI: 00007ffda1488c80
RBP: 00007ffda1488c80 R08: 00000000ffffffff R09: 00007ffda1488a50
R10: 000055555590d903 R11: 0000000000000246 R12: 00007f6f21aaeb24
R13: 00007ffda1489d40 R14: 000055555590d810 R15: 00007ffda1489d80
Code: 40 6c 00 00 00 00 48 81 c4 d8 03 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 3a 35 89 fe 0f 0b e8 33 35 89 fe 0f 0b e8 2c 35 89 fe <0f> 0b e8 25 35 89 fe 0f 0b e8 1e 35 89 fe 48 8b 7c 24 28 e8 14 
RIP: destroy_node_manager+0x4f4/0x780 fs/f2fs/node.c:2780 RSP: ffff888096aa78c0
---[ end trace cb16c5498e68f8d1 ]---
caif:caif_disconnect_client(): nothing to disconnect