kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2937 Comm: kworker/1:2 Not tainted 4.20.0-rc7+ #155
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
RSP: 0018:ffff8881cb60f5b0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110396bf561
RDX: 000000000000006a RSI: ffffffff8623e7bf RDI: 0000000000000350
RBP: ffff8881cb60f5e0 R08: ffff8881cb5fab08 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8881cb5fa240 R12: ffff8881cb60f690
R13: ffff8881b512e600 R14: 0000000000000000 R15: ffff8881d36ad878
FS:  0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000625208 CR3: 00000001b32db000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smc_clcsock_accept net/smc/af_smc.c:837 [inline]
 smc_tcp_listen_work+0x218/0x11c0 net/smc/af_smc.c:1305
 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
kobject: 'loop0' (00000000bdb91154): kobject_uevent_env
kobject: 'loop0' (00000000bdb91154): fill_kobj_path: path = '/devices/virtual/block/loop0'
 loop3: [POWERTEC]
kobject: 'loop3' (000000009cfbe648): kobject_uevent_env
kobject: 'loop4' (00000000d7c54618): kobject_uevent_env
audit: type=1326 audit(1545102083.719:110): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=_ pid=13670 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=228 compat=0 ip=0x45a4ca code=0x7ff00000
kobject: 'loop3' (000000009cfbe648): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (00000000d7c54618): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (000000001db09f4f): kobject_uevent_env
audit: type=1326 audit(1545102083.719:111): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=_ pid=13670 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=1 compat=0 ip=0x411061 code=0x7ff00000
kobject: 'loop2' (000000001db09f4f): fill_kobj_path: path = '/devices/virtual/block/loop2'
audit: type=1326 audit(1545102083.719:112): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=_ pid=13670 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=1 compat=0 ip=0x411061 code=0x7ff00000
kobject: 'loop1' (00000000624c5ea0): kobject_uevent_env
audit: type=1326 audit(1545102083.719:113): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=_ pid=13670 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=231 compat=0 ip=0x457669 code=0x7ff00000
kobject: 'loop1' (00000000624c5ea0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (000000009417fc3c): kobject_uevent_env
kobject: 'loop5' (000000009417fc3c): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (00000000624c5ea0): kobject_uevent_env
kobject: 'loop1' (00000000624c5ea0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (000000001db09f4f): kobject_uevent_env
kobject: 'loop2' (000000001db09f4f): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (00000000bdb91154): kobject_uevent_env
kobject: 'loop0' (00000000bdb91154): fill_kobj_path: path = '/devices/virtual/block/loop0'
---[ end trace 435ae55b33caf64f ]---
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
kobject: 'loop2' (000000001db09f4f): kobject_uevent_env
RSP: 0018:ffff8881cb60f5b0 EFLAGS: 00010206
kobject: 'loop2' (000000001db09f4f): fill_kobj_path: path = '/devices/virtual/block/loop2'
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110396bf561
RDX: 000000000000006a RSI: ffffffff8623e7bf RDI: 0000000000000350
RBP: ffff8881cb60f5e0 R08: ffff8881cb5fab08 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8881cb5fa240 R12: ffff8881cb60f690
R13: ffff8881b512e600 R14: 0000000000000000 R15: ffff8881d36ad878
FS:  0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000073d7d0 CR3: 000000000946a000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400