IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
BUG: unable to handle kernel NULL pointer dereference at 0000000000000038
PGD 80000001f77f4067 P4D 80000001f77f4067 PUD 1ed511067 PMD 0 
Oops: 0000 [#1] SMP PTI
CPU: 1 PID: 18570 Comm: kworker/u4:0 Not tainted 4.18.0-rc8+ #32
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krdsd rds_connect_worker
RIP: 0010:lock_sock include/net/sock.h:1474 [inline]
RIP: 0010:rds_tcp_tune+0x5c/0xc0 net/rds/tcp.c:411
Code: 01 00 00 00 48 8d 4d dc be 06 00 00 00 ba 01 00 00 00 41 b8 04 00 00 00 4c 89 f7 e8 de f9 ae ff 31 f6 4c 89 e7 e8 a4 8c af ff <41> 8b 5f 38 85 db 7e 18 e8 b7 24 9b fe 41 89 9c 24 3c 01 00 00 41 
RSP: 0018:ffff88020b6d3da8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8801eda6f000 RCX: ffff880216246040
RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff822b1719
RBP: ffff88020b6d3dd0 R08: 0000000000000004 R09: ffff880212acc270
R10: ffff880212acc200 R11: ffffffff824c8530 R12: ffff880212acc200
R13: ffff880214c55f00 R14: ffff880211ebdb80 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000038 CR3: 00000001f0c3e000 CR4: 00000000001406e0
Call Trace:
 rds_tcp_conn_path_connect+0xab/0x1b0 net/rds/tcp_connect.c:113
 rds_connect_worker+0x77/0xc0 net/rds/threads.c:175
 process_one_work+0x28e/0x580 kernel/workqueue.c:2153
 worker_thread+0x317/0x690 kernel/workqueue.c:2296
 kthread+0x127/0x140 kernel/kthread.c:247
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:415
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
CR2: 0000000000000038
---[ end trace da96bc20c38563ab ]---
RIP: 0010:lock_sock include/net/sock.h:1474 [inline]
RIP: 0010:rds_tcp_tune+0x5c/0xc0 net/rds/tcp.c:411
Code: 01 00 00 00 48 8d 4d dc be 06 00 00 00 ba 01 00 00 00 41 b8 04 00 00 00 4c 89 f7 e8 de f9 ae ff 31 f6 4c 89 e7 e8 a4 8c af ff <41> 8b 5f 38 85 db 7e 18 e8 b7 24 9b fe 41 89 9c 24 3c 01 00 00 41 
RSP: 0018:ffff88020b6d3da8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8801eda6f000 RCX: ffff880216246040
RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff822b1719
RBP: ffff88020b6d3dd0 R08: 0000000000000004 R09: ffff880212acc270
R10: ffff880212acc200 R11: ffffffff824c8530 R12: ffff880212acc200
R13: ffff880214c55f00 R14: ffff880211ebdb80 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000038 CR3: 00000001f0c3e000 CR4: 00000000001406e0