------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!hlock->nest_lock)
------------[ cut here ]------------
Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'task_struct' (offset 1176, size 2)!
WARNING: CPU: 1 PID: 671813888 at mm/usercopy.c:83 usercopy_warn+0xee/0x110 mm/usercopy.c:78
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 671813888 Comm: ksoftirqd/1 Not tainted 4.20.0-rc6-next-20181214+ #171
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
usercopy: Kernel memory overwrite attempt detected to SLAB object 'signal_cache' (offset 1448, size 2)!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:102!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 671813888 Comm: ksoftirqd/1 Not tainted 4.20.0-rc6-next-20181214+ #171
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
usercopy: Kernel memory overwrite attempt detected to SLAB object 'signal_cache' (offset 1408, size 8)!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:102!
invalid opcode: 0000 [#2] PREEMPT SMP KASAN
CPU: 1 PID: 671813888 Comm: ksoftirqd/1 Not tainted 4.20.0-rc6-next-20181214+ #171
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
usercopy: Kernel memory overwrite attempt detected to SLAB object 'signal_cache' (offset 1328, size 8)!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:102!
invalid opcode: 0000 [#3] PREEMPT SMP KASAN
CPU: 1 PID: 671813888 Comm: ksoftirqd/1 Not tainted 4.20.0-rc6-next-20181214+ #171
list_del corruption. prev->next should be ffff8881beb20530, but was ffffffff8854f8c0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
------------[ cut here ]------------
usercopy: Kernel memory overwrite attempt detected to SLAB object 'signal_cache' (offset 1376, size 8)!
kernel BUG at lib/list_debug.c:53!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:102!
invalid opcode: 0000 [#4] PREEMPT SMP KASAN
CPU: 1 PID: 671813888 Comm: ksoftirqd/1 Not tainted 4.20.0-rc6-next-20181214+ #171
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
usercopy: Kernel memory overwrite attempt detected to SLAB object 'signal_cache' (offset 1360, size 23)!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:102!
invalid opcode: 0000 [#5] PREEMPT SMP KASAN
CPU: 1 PID: 671813888 Comm: ksoftirqd/1 Not tainted 4.20.0-rc6-next-20181214+ #171
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
------------[ cut here ]------------
kernel BUG at mm/slab.c:4412!
invalid opcode: 0000 [#6] PREEMPT SMP KASAN
CPU: 1 PID: 671813888 Comm: ksoftirqd/1 Not tainted 4.20.0-rc6-next-20181214+ #171
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__check_heap_object+0xa7/0xb5 mm/slab.c:4437
Code: 48 c7 c7 ed 82 35 89 e8 37 d9 0a 00 5d c3 41 8b 91 04 01 00 00 48 29 c7 48 39 d7 77 be 48 01 d0 48 29 c8 48 39 f0 72 b3 5d c3 <0f> 0b 48 c7 c7 ed 82 35 89 e8 9d e1 0a 00 44 89 e9 48 c7 c7 a8 83
RSP: 0018:ffff8881d9b29d18 EFLAGS: 00010046
RAX: 0000000000000003 RBX: 1ffff1103b3653aa RCX: 000000000000000b
RDX: ffff8881d9b28180 RSI: 0000000000000008 RDI: ffff8881d9b29ec8
RBP: ffff8881d9b29d18 R08: ffff8881d9b2c440 R09: ffff8881da956000
R10: 000000000000155e R11: 0000000000000000 R12: ffff8881d9b29ec8
R13: 0000000000000008 R14: ffffea000766ca00 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000130 CR3: 00000001d77e2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Modules linked in:
---[ end trace 6bb31bb717b01245 ]---
RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90
Code: c0 e8 c7 ef b0 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 00 f9 54 88 ff 75 d0 41 57 e8 87 ff 96 ff <0f> 0b e8 9c ef b0 ff e8 07 3b f5 ff 8b 95 e4 fe ff ff 4c 89 e1 31
RSP: 0018:ffff8881d9b2bb98 EFLAGS: 00010086
RAX: 0000000000000067 RBX: ffffffff88491be0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816626e5 RDI: 0000000000000005
RBP: ffff8881d9b2bbf0 R08: ffff8881d9b2c440 R09: ffffed103b5a3ef8
R10: ffffed103b5a3ef8 R11: ffff8881dad1f7c7 R12: ffffffff893582ed
R13: ffffffff8854f760 R14: ffffffff8854f6a0 R15: ffffffff8854f660
FS:  0000000000000000(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000130 CR3: 00000001d77e2000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400