==================================================================
BUG: KASAN: slab-out-of-bounds in class_equal+0x40/0x50 kernel/locking/lockdep.c:1527
Read of size 8 at addr ffff888079cb2260 by task syz-executor.5/9568

CPU: 1 PID: 9568 Comm: syz-executor.5 Not tainted 5.2.0-rc4+ #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:

Allocated by task 2249025632:
------------[ cut here ]------------
kernel BUG at mm/slab.c:4178!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9568 Comm: syz-executor.5 Not tainted 5.2.0-rc4+ #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__check_heap_object+0xa5/0xb3 mm/slab.c:4178
Code: 2b 48 c7 c7 75 08 62 88 e8 48 ad 07 00 5d c3 41 8b 91 04 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 75 08 62 88 e8 5c b2 07 00 44 89 e1 48 c7 c7 30 09
RSP: 0018:ffff888079cb13d8 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000002 RCX: 000000000000000c
RDX: ffff888079cb0280 RSI: 0000000000000000 RDI: ffff888079cb1490
RBP: ffff888079cb1428 R08: 0000000000000002 R09: ffff8880aa594c40
R10: 0000000000000ff0 R11: 0000000000000001 R12: ffff888079cb1490
R13: ffffea0001e72c00 R14: ffff888079cb1492 R15: 0000000000000001
FS:  00005555556e2940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c045b98 CR3: 000000008f25b000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Modules linked in:
---[ end trace e59765801d7daeb8 ]---
RIP: 0010:__check_heap_object+0xa5/0xb3 mm/slab.c:4178
Code: 2b 48 c7 c7 75 08 62 88 e8 48 ad 07 00 5d c3 41 8b 91 04 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 75 08 62 88 e8 5c b2 07 00 44 89 e1 48 c7 c7 30 09
RSP: 0018:ffff888079cb13d8 EFLAGS: 00010046
RAX: 0000000000000001 RBX: 0000000000000002 RCX: 000000000000000c
RDX: ffff888079cb0280 RSI: 0000000000000000 RDI: ffff888079cb1490
RBP: ffff888079cb1428 R08: 0000000000000002 R09: ffff8880aa594c40
R10: 0000000000000ff0 R11: 0000000000000001 R12: ffff888079cb1490
R13: ffffea0001e72c00 R14: ffff888079cb1492 R15: 0000000000000001
FS:  00005555556e2940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c045b98 CR3: 000000008f25b000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400