IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
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: 0 PID: 16429 Comm: kworker/0:6 Not tainted 4.19.0-rc6+ #251
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events smc_tcp_listen_work
RIP: 0010:inet_accept+0x106/0x9e0 net/ipv4/af_inet.c:734
Code: 09 80 fa 03 0f 8e 54 07 00 00 41 c7 86 40 ff ff ff ea ff ff ff 48 8d 78 28 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 56 07 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffff880196987478 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000005
RDX: dffffc0000000000 RSI: ffffffff868dc8c3 RDI: 0000000000000028
RBP: ffff8801969875a0 R08: ffff8801d970e400 R09: ffffed0032d30e6a
R10: ffffed0032d30e6a R11: 0000000000000003 R12: ffff8801b8cdaa80
kobject: 'loop0' (0000000069511ab9): kobject_uevent_env
R13: ffff8801969874b8 R14: ffff880196987578 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000001ce36e000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject: 'loop0' (0000000069511ab9): fill_kobj_path: path = '/devices/virtual/block/loop0'
 kernel_accept+0x136/0x310 net/socket.c:3247
 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+0xc90/0x1b90 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x420 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413
Modules linked in:
---[ end trace e01a4091e830b50f ]---
RIP: 0010:inet_accept+0x106/0x9e0 net/ipv4/af_inet.c:734
kobject: 'loop4' (0000000015103c65): kobject_uevent_env
Code: 09 80 fa 03 0f 8e 54 07 00 00 41 c7 86 40 ff ff ff ea ff ff ff 48 8d 78 28 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 56 07 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffff880196987478 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000005
RDX: dffffc0000000000 RSI: ffffffff868dc8c3 RDI: 0000000000000028
RBP: ffff8801969875a0 R08: ffff8801d970e400 R09: ffffed0032d30e6a
kobject: 'loop4' (0000000015103c65): fill_kobj_path: path = '/devices/virtual/block/loop4'
R10: ffffed0032d30e6a R11: 0000000000000003 R12: ffff8801b8cdaa80
R13: ffff8801969874b8 R14: ffff880196987578 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
kobject: 'loop5' (000000009748960e): kobject_uevent_env
kobject: 'loop5' (000000009748960e): fill_kobj_path: path = '/devices/virtual/block/loop5'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop2' (000000005a257881): kobject_uevent_env
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
kobject: 'loop2' (000000005a257881): fill_kobj_path: path = '/devices/virtual/block/loop2'
CR2: 0000000000625208 CR3: 000000000926a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400