kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6215 Comm: kworker/1:2 Not tainted 4.20.0-rc2+ #296
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events smc_tcp_listen_work
RIP: 0010:kernel_accept+0x5a/0x310 net/socket.c:3245
Code: 48 c1 ea 03 80 3c 02 00 0f 85 4a 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 20 48 8d bb 50 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 02 00 00 48 8d 7b 10 0f b6
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
RSP: 0018:ffff888199f575b0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110333e9121
RDX: 000000000000006a RSI: ffffffff861867af RDI: 0000000000000350
RBP: ffff888199f575e0 R08: ffff888199f48908 R09: 0000000000000006
R10: 0000000000000000 R11: ffff888199f48040 R12: ffff888199f57690
R13: ffff8881c06cb5c0 R14: 0000000000000000 R15: ffff8881cb35f4b8
FS:  0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f559d8a2000 CR3: 00000001d94f2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smc_clcsock_accept net/smc/af_smc.c:834 [inline]
 smc_tcp_listen_work+0x218/0x11c0 net/smc/af_smc.c:1302
 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
kobject: 'loop3' (00000000954c54ad): kobject_uevent_env
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
kobject: 'loop3' (00000000954c54ad): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (0000000004699891): kobject_uevent_env
kobject: 'loop2' (0000000004699891): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (0000000069105258): kobject_uevent_env
kobject: 'loop0' (0000000069105258): fill_kobj_path: path = '/devices/virtual/block/loop0'
 kthread+0x35a/0x440 kernel/kthread.c:246
kobject: 'loop3' (00000000954c54ad): kobject_uevent_env
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace f5b9435d5e57d09e ]---
kobject: 'loop3' (00000000954c54ad): fill_kobj_path: path = '/devices/virtual/block/loop3'
RIP: 0010:kernel_accept+0x5a/0x310 net/socket.c:3245
kobject: 'loop4' (000000001a2935f0): kobject_uevent_env
Code: 48 c1 ea 03 80 3c 02 00 0f 85 4a 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 20 48 8d bb 50 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 02 00 00 48 8d 7b 10 0f b6
kobject: 'loop4' (000000001a2935f0): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (0000000004699891): kobject_uevent_env
RSP: 0018:ffff888199f575b0 EFLAGS: 00010206
kobject: 'loop2' (0000000004699891): fill_kobj_path: path = '/devices/virtual/block/loop2'
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110333e9121
kobject: 'loop5' (00000000961132eb): kobject_uevent_env
RDX: 000000000000006a RSI: ffffffff861867af RDI: 0000000000000350
kobject: 'loop5' (00000000961132eb): fill_kobj_path: path = '/devices/virtual/block/loop5'
RBP: ffff888199f575e0 R08: ffff888199f48908 R09: 0000000000000006
R10: 0000000000000000 R11: ffff888199f48040 R12: ffff888199f57690
R13: ffff8881c06cb5c0 R14: 0000000000000000 R15: ffff8881cb35f4b8
FS:  0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000001db8e80 CR3: 00000001cc9f7000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400