WARNING: CPU: 0 PID: 2984 at kernel/signal.c:340 task_participate_group_stop+0x1ce/0x230 kernel/signal.c:340 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 2984 Comm: syz-executor0 Not tainted 4.14.0-rc5+ #47 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:task_participate_group_stop+0x1ce/0x230 kernel/signal.c:340 RSP: 0018:ffff8801d29ef808 EFLAGS: 00010097 RAX: ffff8801d28fa2c0 RBX: ffff8801d28fa2c0 RCX: 0000000000000012 RDX: 0000000000000000 RSI: 0000000000060013 RDI: ffff8801d28fa750 RBP: ffff8801d29ef820 R08: ffffffff8143968c R09: 000000000000000c R10: ffff8801d29ef700 R11: 0000000000000000 R12: ffff8801d234f2c0 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8801d28fa848 do_signal_stop+0x217/0x910 kernel/signal.c:2042 get_signal+0x55a/0x16d0 kernel/signal.c:2297 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808 exit_to_usermode_loop+0x214/0x310 arch/x86/entry/common.c:158 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:266 [inline] do_syscall_32_irqs_on arch/x86/entry/common.c:335 [inline] do_fast_syscall_32+0x83e/0xf05 arch/x86/entry/common.c:391 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124 RIP: 0023:0xf7fc2c79 RSP: 002b:000000000847f9ec EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: fffffffffffffdfc RBX: 000000000847fa18 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 000000000000e4a7 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000