------------[ cut here ]------------ WARNING: CPU: 0 PID: 9411 at kernel/signal.c:378 task_participate_group_stop+0x200/0x260 kernel/signal.c:378 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9411 Comm: 3 Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:task_participate_group_stop+0x200/0x260 kernel/signal.c:378 Code: d0 7c 04 84 d2 75 44 41 89 9d a4 00 00 00 41 bc 01 00 00 00 e9 59 ff ff ff e8 4c d9 2b 00 0f 0b e9 91 fe ff ff e8 40 d9 2b 00 <0f> 0b e9 fe fe ff ff 4c 89 e7 e8 71 2b 69 00 e9 ca fe ff ff 4c 89 RSP: 0018:ffff88807d65fc10 EFLAGS: 00010093 RAX: ffff88808eca60c0 RBX: 0000000000000000 RCX: ffffffff81490dfe RDX: 0000000000000000 RSI: ffffffff81490f10 RDI: 0000000000000005 RBP: ffff88807d65fc30 R08: ffff88808eca60c0 R09: ffffed100facbf82 R10: ffffed100facbf81 R11: 0000000000000003 R12: ffff8880a70f78a0 R13: ffff8880a70f7800 R14: 0000000000040000 R15: ffff88807d65ff58 do_signal_stop+0x1e6/0x840 kernel/signal.c:2367 get_signal+0x101e/0x24f0 kernel/signal.c:2592 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] syscall_return_slowpath arch/x86/entry/common.c:278 [inline] do_syscall_32_irqs_on arch/x86/entry/common.c:352 [inline] do_fast_syscall_32+0xbbd/0xe16 arch/x86/entry/common.c:408 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0033:0x324 Code: Bad RIP value. RSP: 002b:00007ffc7ebbf020 EFLAGS: 00000200 ORIG_RAX: 000000000000003b RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..