WARNING: CPU: 0 PID: 10044 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: 10044 Comm: syzkaller957598 Not tainted 4.14.0-rc2-next-20170927+ #30 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:181 __warn+0x1c4/0x1d9 kernel/panic.c:542 report_bug+0x211/0x2d0 lib/bug.c:183 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline] do_trap+0x260/0x390 arch/x86/kernel/traps.c:261 do_error_trap+0x120/0x390 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+0x15b/0x190 kernel/futex.c:818 RSP: 0018:ffff8801ba28f7a8 EFLAGS: 00010097 RAX: ffff8801d36ee1c0 RBX: 0000000000000000 RCX: 1ffff10037451efa RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff8801d864fe40 RBP: ffff8801ba28f838 R08: ffff8801d36ef480 R09: 1ffff10037451edf R10: ffff8801d36ee1c0 R11: 0000000000000002 R12: 1ffff10037451ef6 R13: ffff8801d864fe40 R14: 1ffff10037451efa R15: ffff8801d864ff00 exit_pi_state_list+0x556/0x7a0 kernel/futex.c:932 mm_release+0x46d/0x590 kernel/fork.c:1126 exit_mm kernel/exit.c:499 [inline] do_exit+0x481/0x1b00 kernel/exit.c:852 SYSC_exit kernel/exit.c:937 [inline] SyS_exit+0x22/0x30 kernel/exit.c:935 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x40386e RSP: 002b:00007fe11586ed20 EFLAGS: 00000246 ORIG_RAX: 000000000000003c RAX: ffffffffffffffda RBX: 00007fe11586f700 RCX: 000000000040386e RDX: 000000000000003c RSI: 00000000007fb000 RDI: 0000000000000000 RBP: 0000000000000086 R08: 0000000020048000 R09: 0000000000000000 R10: 0000000020edfff0 R11: 0000000000000246 R12: 0000000000000000 R13: 00000000007ef87f R14: 00007fe11586f9c0 R15: 0000000000000000