==================================================================
BUG: KASAN: slab-out-of-bounds in class_equal+0x40/0x50 kernel/locking/lockdep.c:1579
Read of size 8 at addr ffff88809579a0b0 by task syz-executor.5/9174

CPU: 1 PID: 9174 Comm: syz-executor.5 Not tainted 5.2.0+ #66
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:

Allocated by task 2250223248:
usercopy: Kernel memory overwrite attempt detected to SLAB object 'kmalloc-4k' (offset 4128, size 2)!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:98!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 9174 Comm: syz-executor.5 Not tainted 5.2.0+ #66
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:usercopy_abort+0xbd/0xbf mm/usercopy.c:98
Code: c0 e8 0b 62 be ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 c0 09 96 87 ff 75 d0 41 57 e8 3b 14 a8 ff <0f> 0b e8 e0 61 be ff e8 bb 3e f8 ff 8b 55 d4 4c 89 e1 49 89 d8 4c
RSP: 0018:ffff888095799738 EFLAGS: 00010086
RAX: 0000000000000068 RBX: ffffffff8884366d RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815c1016 RDI: ffffed1012af32d9
RBP: ffff888095799790 R08: 0000000000000068 R09: ffffed1015d244fa
R10: ffffed1015d244f9 R11: ffff8880ae9227cf R12: ffffffff8884730d
R13: ffffffff87960820 R14: ffffffff87960760 R15: ffffffff87960720
FS:  0000555556a4a940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c26cbb8 CR3: 00000000a0a13000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Modules linked in:
---[ end trace 39805463ed78252b ]---
RIP: 0010:usercopy_abort+0xbd/0xbf mm/usercopy.c:98
Code: c0 e8 0b 62 be ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 c0 09 96 87 ff 75 d0 41 57 e8 3b 14 a8 ff <0f> 0b e8 e0 61 be ff e8 bb 3e f8 ff 8b 55 d4 4c 89 e1 49 89 d8 4c
RSP: 0018:ffff888095799738 EFLAGS: 00010086
RAX: 0000000000000068 RBX: ffffffff8884366d RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815c1016 RDI: ffffed1012af32d9
RBP: ffff888095799790 R08: 0000000000000068 R09: ffffed1015d244fa
R10: ffffed1015d244f9 R11: ffff8880ae9227cf R12: ffffffff8884730d
R13: ffffffff87960820 R14: ffffffff87960760 R15: ffffffff87960720
FS:  0000555556a4a940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8c26cbb8 CR3: 00000000a0a13000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400