kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
IPVS: sh: UDP 172.20.20.170:0 - no destination available
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 6385 Comm: kworker/0:3 Not tainted 4.20.0-rc2+ #293
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:ffff888194bcf478 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000005
RDX: dffffc0000000000 RSI: ffffffff86a8d4a3 RDI: 0000000000000028
RBP: ffff888194bcf5a0 R08: ffff8881d1f1c300 R09: ffffed1032979e6a
R10: ffffed1032979e6a R11: 0000000000000003 R12: ffff8881b7164900
R13: ffff888194bcf4b8 R14: ffff888194bcf578 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000728000 CR3: 00000001be504000 CR4: 00000000001406f0
Call Trace:
 kernel_accept+0x136/0x310 net/socket.c:3250
 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
 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' (0000000038bde2d8): kobject_uevent_env
kobject: 'loop0' (0000000038bde2d8): fill_kobj_path: path = '/devices/virtual/block/loop0'
------------[ cut here ]------------
downgrading a read lock
WARNING: CPU: 1 PID: 26319 at kernel/locking/lockdep.c:3556 __lock_downgrade kernel/locking/lockdep.c:3556 [inline]
WARNING: CPU: 1 PID: 26319 at kernel/locking/lockdep.c:3556 lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3819