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WARNING: CPU: 0 PID: 27596 at kernel/futex.c:818 atomic_try_cmpxchg arch/x86/include/asm/atomic.h:192 [inline]
WARNING: CPU: 0 PID: 27596 at kernel/futex.c:818 __atomic_add_unless arch/x86/include/asm/atomic.h:267 [inline]
WARNING: CPU: 0 PID: 27596 at kernel/futex.c:818 atomic_add_unless include/linux/atomic.h:532 [inline]
WARNING: CPU: 0 PID: 27596 at kernel/futex.c:818 get_pi_state+0x115/0x140 kernel/futex.c:818
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 27596 Comm: syz-executor1 Not tainted 4.14.0-rc2+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x145/0x1e1 lib/dump_stack.c:52
 panic+0x1a9/0x34e kernel/panic.c:181
 __warn.cold.8+0x11a/0x156 kernel/panic.c:542
 report_bug+0x1a3/0x227 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x1ef/0x2d0 arch/x86/kernel/traps.c:261
 do_error_trap+0x11f/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:get_pi_state+0x115/0x140 kernel/futex.c:818
RSP: 0000:ffff88003362f1b0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88003ddc1c00 RCX: 1ffff100066c5e3b
RDX: dffffc0000000000 RSI: ffff880030a5e658 RDI: ffff88003ddc1b40
RBP: ffff88003362f240 R08: ffff880030a5e678 R09: 0000000000000006
R10: 0000000000000000 R11: ffff880030a5dd80 R12: 1ffff100066c5e37
R13: ffff88003ddc1b40 R14: 1ffff100066c5e3b R15: ffff88003362f218
 exit_pi_state_list+0x4b8/0x730 kernel/futex.c:927
 mm_release+0x413/0x520 kernel/fork.c:1126
 exit_mm kernel/exit.c:499 [inline]
 do_exit+0x42c/0x18c0 kernel/exit.c:852
 do_group_exit+0x135/0x3b0 kernel/exit.c:968
 get_signal+0x6ad/0x1480 kernel/signal.c:2334
 do_signal+0x94/0x2210 arch/x86/kernel/signal.c:808
 exit_to_usermode_loop+0x1bc/0x290 arch/x86/entry/common.c:158
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath+0x341/0x400 arch/x86/entry/common.c:266
 entry_SYSCALL_64_fastpath+0xc0/0xc2
RIP: 0033:0x4576a9
RSP: 002b:00007f2bce24ec88 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000000 RBX: 000000000071c040 RCX: 00000000004576a9
RDX: 0000000000000004 RSI: 000080000000000b RDI: 000000002000cffc
RBP: 0000000000000006 R08: 0000000020048000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2bce24f6d4
R13: 00000000004a5897 R14: 00000000006e24f0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..