================================================================== BUG: KASAN: slab-out-of-bounds in class_equal+0x40/0x50 kernel/locking/lockdep.c:1527 Read of size 8 at addr ffff8880a044be90 by task syz-executor.2/10153 CPU: 1 PID: 10153 Comm: syz-executor.2 Not tainted 5.2.0-rc2+ #40 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Allocated by task 2688857208: ------------[ cut here ]------------ kernel BUG at mm/slab.c:4178! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 10153 Comm: syz-executor.2 Not tainted 5.2.0-rc2+ #40 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 cd 02 62 88 e8 28 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 cd 02 62 88 e8 3c b2 07 00 44 89 e1 48 c7 c7 88 03 RSP: 0018:ffff8880a044b4e8 EFLAGS: 00010046 RAX: 0000000000000001 RBX: 0000000000000002 RCX: 000000000000000c RDX: ffff8880a044a440 RSI: 0000000000000000 RDI: ffff8880a044b5a0 RBP: ffff8880a044b538 R08: 0000000000000002 R09: ffff8880aa400dc0 R10: 0000000000000f54 R11: 0000000000000001 R12: ffff8880a044b5a0 R13: ffffea0002811280 R14: ffff8880a044b5a2 R15: 0000000000000001 FS: 0000555556838940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8c00a020 CR3: 00000000a8bd3000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: ---[ end trace f3a87eff51c75d59 ]--- RIP: 0010:__check_heap_object+0xa5/0xb3 mm/slab.c:4178 Code: 2b 48 c7 c7 cd 02 62 88 e8 28 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 cd 02 62 88 e8 3c b2 07 00 44 89 e1 48 c7 c7 88 03 RSP: 0018:ffff8880a044b4e8 EFLAGS: 00010046 RAX: 0000000000000001 RBX: 0000000000000002 RCX: 000000000000000c RDX: ffff8880a044a440 RSI: 0000000000000000 RDI: ffff8880a044b5a0 RBP: ffff8880a044b538 R08: 0000000000000002 R09: ffff8880aa400dc0 R10: 0000000000000f54 R11: 0000000000000001 R12: ffff8880a044b5a0 R13: ffffea0002811280 R14: ffff8880a044b5a2 R15: 0000000000000001 FS: 0000555556838940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8c00a020 CR3: 00000000a8bd3000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400