==================================================================
BUG: KASAN: slab-out-of-bounds in class_equal+0x40/0x50 /kernel/locking/lockdep.c:1579
Read of size 8 at addr ffff88807b865d40 by task syz-executor.5/9914

CPU: 0 PID: 9914 Comm: syz-executor.5 Not tainted 5.2.0+ #91
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:

Allocated by task 2927773632:
------------[ cut here ]------------
kernel BUG at mm/slab.c:4179!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9914 Comm: syz-executor.5 Not tainted 5.2.0+ #91
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__check_heap_object+0xa5/0xb3 /mm/slab.c:4179
Code: 2b 48 c7 c7 4d 74 84 88 e8 98 db 07 00 5d c3 41 8b 91 3c 01 00 00 48 29 c7 48 39 d7 77 bd 48 01 d0 48 29 c8 4c 39 c0 72 b2 c3 <0f> 0b 48 c7 c7 4d 74 84 88 e8 b9 e0 07 00 4c 8d 45 c4 89 d9 48 c7
RSP: 0018:ffff88807b8656a0 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 000000000000000c
RDX: ffff88807b864540 RSI: 0000000000000000 RDI: ffff88807b865798
RBP: ffff88807b8656f0 R08: 0000000000000001 R09: ffff88821bc46380
R10: 000000000000102f R11: ffffea0001ee1907 R12: ffff88807b865798
R13: ffffea0001ee1900 R14: ffff88807b865799 R15: 0000000000000001
FS:  00005555568eb940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c230fc0 CR3: 0000000095a7f000 CR4: 00000000001406f0
Call Trace:
Modules linked in:
---[ end trace 7610c138ead09cf3 ]---
RIP: 0010:__check_heap_object+0xa5/0xb3 /mm/slab.c:4179
Code: 2b 48 c7 c7 4d 74 84 88 e8 98 db 07 00 5d c3 41 8b 91 3c 01 00 00 48 29 c7 48 39 d7 77 bd 48 01 d0 48 29 c8 4c 39 c0 72 b2 c3 <0f> 0b 48 c7 c7 4d 74 84 88 e8 b9 e0 07 00 4c 8d 45 c4 89 d9 48 c7
RSP: 0018:ffff88807b8656a0 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 000000000000000c
RDX: ffff88807b864540 RSI: 0000000000000000 RDI: ffff88807b865798
RBP: ffff88807b8656f0 R08: 0000000000000001 R09: ffff88821bc46380
R10: 000000000000102f R11: ffffea0001ee1907 R12: ffff88807b865798
R13: ffffea0001ee1900 R14: ffff88807b865799 R15: 0000000000000001
FS:  00005555568eb940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c230fc0 CR3: 0000000095a7f000 CR4: 00000000001406f0