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BUG: KASAN: slab-out-of-bounds in class_equal+0x40/0x50 kernel/locking/lockdep.c:1579
Read of size 8 at addr ffff88808811b900 by task syz-executor.5/9557

CPU: 1 PID: 9557 Comm: syz-executor.5 Not tainted 5.2.0+ #97
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:

Allocated by task 2928822208:
------------[ cut here ]------------
kernel BUG at mm/slab.c:4179!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9557 Comm: syz-executor.5 Not tainted 5.2.0+ #97
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 b5 b3 88 88 e8 08 e1 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 b5 b3 88 88 e8 29 e6 07 00 4c 8d 45 c4 89 d9 48 c7
RSP: 0018:ffff88808811b260 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 000000000000000c
RDX: ffff88808811a100 RSI: 0000000000000000 RDI: ffff88808811b358
RBP: ffff88808811b2b0 R08: 0000000000000001 R09: ffff8880aa402000
R10: 000000000000102f R11: ffffea0002204687 R12: ffff88808811b358
R13: ffffea0002204680 R14: ffff88808811b359 R15: 0000000000000001
FS:  0000555557492940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c258660 CR3: 000000009a0d7000 CR4: 00000000001406e0
Call Trace:
Modules linked in:
---[ end trace 9ab28ff437c7920d ]---
RIP: 0010:__check_heap_object+0xa5/0xb3 mm/slab.c:4179
Code: 2b 48 c7 c7 b5 b3 88 88 e8 08 e1 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 b5 b3 88 88 e8 29 e6 07 00 4c 8d 45 c4 89 d9 48 c7
RSP: 0018:ffff88808811b260 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 000000000000000c
RDX: ffff88808811a100 RSI: 0000000000000000 RDI: ffff88808811b358
RBP: ffff88808811b2b0 R08: 0000000000000001 R09: ffff8880aa402000
R10: 000000000000102f R11: ffffea0002204687 R12: ffff88808811b358
R13: ffffea0002204680 R14: ffff88808811b359 R15: 0000000000000001
FS:  0000555557492940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c258660 CR3: 000000009a0d7000 CR4: 00000000001406e0