------------[ cut here ]------------
WARNING: CPU: 0 PID: 9302 at kernel/futex.c:818 get_pi_state+0x15b/0x190 kernel/futex.c:818
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 9302 Comm: syz-executor7 Not tainted 4.13.0-rc5+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:180
 __warn+0x1c4/0x1d9 kernel/panic.c:541
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:190
 do_trap_no_signal arch/x86/kernel/traps.c:224 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:273
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:310
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:323
 invalid_op+0x1e/0x30 arch/x86/entry/entry_64.S:846
RIP: 0010:get_pi_state+0x15b/0x190 kernel/futex.c:818
RSP: 0018:ffff8801cb2af090 EFLAGS: 00010297
RAX: ffff8801cf82a080 RBX: 0000000000000000 RCX: 1ffff10039655e17
RDX: 0000000000000000 RSI: 1ffff10039f05524 RDI: ffff8801d95e33c0
RBP: ffff8801cb2af120 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff10039655e13
R13: ffff8801d95e33c0 R14: 1ffff10039655e17 R15: ffff8801d95e3470
 exit_pi_state_list+0x543/0x780 kernel/futex.c:925
 mm_release+0x46d/0x590 kernel/fork.c:1122
 exit_mm kernel/exit.c:499 [inline]
 do_exit+0x470/0x1b10 kernel/exit.c:852
 do_group_exit+0x149/0x400 kernel/exit.c:969
 get_signal+0x7e8/0x17e0 kernel/signal.c:2330
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
 exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:157
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath+0x3a7/0x450 arch/x86/entry/common.c:263
 entry_SYSCALL_64_fastpath+0xbc/0xbe
RIP: 0033:0x4512e9
RSP: 002b:00007f458d8b5c08 EFLAGS: 00000216 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 00000000007180a8 RCX: 00000000004512e9
RDX: 0000000000000004 RSI: 000080000000000b RDI: 000000002000cffc
RBP: 0000000000000840 R08: 0000000020048000 R09: 0000000000000000
R10: 000000002000b000 R11: 0000000000000216 R12: 00000000004b6946
R13: 00000000ffffffff R14: 000000002000cffc R15: 000080000000000b
=====================================
WARNING: bad unlock balance detected!
4.13.0-rc5+ #40 Not tainted
-------------------------------------
syz-executor7/9274 is trying to release lock (
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 9274 Comm: syz-executor7 Not tainted 4.13.0-rc5+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801cf3dc180 task.stack: ffff8801d93d8000
RIP: 0010:print_lockdep_cache.isra.32+0x64/0xe6 kernel/locking/lockdep.c:538
RSP: 0018:ffff8801d93ded98 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: 1ffff1003b27bdb3 RCX: 0000000000000000
RDX: 00000000000000fe RSI: 00000000000007f0 RDI: 00000000000007d8
RBP: ffff8801d93dee70 R08: 1ffff1003b27bd5e R09: 0000000000000001
R10: 0000000000000002 R11: fffffbfff0e5ef81 R12: 00000000000007d8
R13: 00000000000007f0 R14: ffff8801d93deef0 R15: 1ffff1003b27bdda
FS:  00007f458d8d7700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000461ec0 CR3: 00000001d8f33000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 print_unlock_imbalance_bug+0xe0/0x140 kernel/locking/lockdep.c:3412
 __lock_release kernel/locking/lockdep.c:3626 [inline]
 lock_release+0x700/0xa40 kernel/locking/lockdep.c:3874
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:166 [inline]
 _raw_spin_unlock_irq+0x1a/0x70 kernel/locking/spinlock.c:199
 put_pi_state+0x252/0x520 kernel/futex.c:842
 exit_pi_state_list+0x55c/0x780 kernel/futex.c:929
 mm_release+0x46d/0x590 kernel/fork.c:1122
 exit_mm kernel/exit.c:499 [inline]
 do_exit+0x470/0x1b10 kernel/exit.c:852
 do_group_exit+0x149/0x400 kernel/exit.c:969
 get_signal+0x7e8/0x17e0 kernel/signal.c:2330
 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808
 exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:157
 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath+0x3a7/0x450 arch/x86/entry/common.c:263
 entry_SYSCALL_64_fastpath+0xbc/0xbe
RIP: 0033:0x4512e9
RSP: 002b:00007f458d8d6cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 0000000000718020 RCX: 00000000004512e9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000718020
RBP: 0000000000718000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff2e671adf R14: 00007f458d8d79c0 R15: 0000000000000000
Code: 03 48 c7 85 30 ff ff ff e3 77 75 85 48 c7 85 38 ff ff ff 89 e4 55 81 c7 02 f1 f1 f1 f1 c7 42 14 f3 f3 f3 f3 48 89 f2 48 c1 ea 03 <80> 3c 02 00 74 08 48 89 f7 e8 95 d4 4a 00 49 8b 45 00 48 85 c0 
RIP: print_lockdep_cache.isra.32+0x64/0xe6 kernel/locking/lockdep.c:538 RSP: ffff8801d93ded98
---[ end trace d30e8bcd3a4895d2 ]---