------------[ cut here ]------------
kernel BUG at mm/slub.c:3934!
invalid opcode: 0000 [#1] SMP PTI
CPU: 0 PID: 8207 Comm: syz-executor5 Not tainted 4.18.0-rc8+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kfree+0x1b7a/0x29d0 mm/slub.c:3934
Code: ff ff 8b bd 4c ff ff ff e8 03 8f 02 00 84 db 0f 85 f9 eb ff ff e9 d7 f9 ff ff 8b 3a e8 ef 8e 02 00 4d 85 f6 0f 85 91 ec ff ff <0f> 0b eb fe 44 89 ef e8 da 8e 02 00 e9 4b ec ff ff 48 8b 85 70 ff 
RSP: 0018:ffff88021fc0fc68 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffea0006000000 RCX: 0000000000000000
RDX: ffffffff8a1af000 RSI: 0000000000000001 RDI: ffffea0006000008
RBP: ffff88021fc0fdc0 R08: 0000000000000000 R09: 0000000000000000
R10: 000077ff80000000 R11: ffffffff81a32650 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88021fffad9f
FS:  00007fc4c6eb6700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000400200 CR3: 000000012681e000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_reclaim kernel/rcu/rcu.h:173 [inline]
 rcu_do_batch kernel/rcu/tree.c:2558 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2818 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2785 [inline]
 rcu_process_callbacks+0x12a9/0x1a90 kernel/rcu/tree.c:2802
 __do_softirq+0x582/0x969 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x208/0x240 kernel/softirq.c:414
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:527
 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1058
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:868
 </IRQ>
RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:78 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x4b/0x70 kernel/locking/spinlock.c:184
Code: 00 8b b8 88 0c 00 00 48 8b 00 48 85 c0 75 28 48 89 df e8 38 ee 15 f9 c6 00 00 c6 03 00 4d 85 e4 75 1c 4c 89 7d d8 ff 75 d8 9d <48> 83 c4 08 5b 41 5c 41 5e 41 5f 5d c3 e8 e3 f7 15 f9 eb d1 44 89 
RSP: 0018:ffff88012cd1f818 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: ffff88012da15f84 RBX: ffff88012da0df84 RCX: ffff88012da1df84
RDX: ffff88012da1df84 RSI: aaaaaaaaaaaab000 RDI: ffffea000711c4e0
RBP: ffff88012cd1f840 R08: 0000000000480020 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff8134f310 R12: 0000000000000000
R13: ffff88012da088f8 R14: 0000000094800000 R15: 0000000000000286
 try_to_wake_up+0x214d/0x21c0 kernel/sched/core.c:2081
 wake_up_process+0x34/0x40 kernel/sched/core.c:2150
 wake_up_q+0x5f/0xa0 kernel/sched/core.c:449
 futex_wake+0x99a/0xbe0 kernel/futex.c:1556
 do_futex+0x9f6/0x6b00 kernel/futex.c:3531
 __do_sys_futex kernel/futex.c:3587 [inline]
 __se_sys_futex+0x372/0x7d0 kernel/futex.c:3555
 __x64_sys_futex+0x1a2/0x200 kernel/futex.c:3555
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457089
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007fc4c6eb5cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000009300a8 RCX: 0000000000457089
RDX: 000000000000000e RSI: 0000000000000001 RDI: 00000000009300ac
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000009300ac
R13: 0000000000a3fb9f R14: 00007fc4c6eb69c0 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 1927d9198b478319 ]---
RIP: 0010:kfree+0x1b7a/0x29d0 mm/slub.c:3934
Code: ff ff 8b bd 4c ff ff ff e8 03 8f 02 00 84 db 0f 85 f9 eb ff ff e9 d7 f9 ff ff 8b 3a e8 ef 8e 02 00 4d 85 f6 0f 85 91 ec ff ff <0f> 0b eb fe 44 89 ef e8 da 8e 02 00 e9 4b ec ff ff 48 8b 85 70 ff 
RSP: 0018:ffff88021fc0fc68 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffea0006000000 RCX: 0000000000000000
RDX: ffffffff8a1af000 RSI: 0000000000000001 RDI: ffffea0006000008
RBP: ffff88021fc0fdc0 R08: 0000000000000000 R09: 0000000000000000
R10: 000077ff80000000 R11: ffffffff81a32650 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88021fffad9f
FS:  00007fc4c6eb6700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000400200 CR3: 000000012681e000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600