process '/newroot/0/file0' started with executable stack
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8293 at kernel/signal.c:378 task_participate_group_stop+0x20a/0x270 kernel/signal.c:378
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 8293 Comm: file0 Not tainted 5.6.0-rc7-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+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 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+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:task_participate_group_stop+0x20a/0x270 kernel/signal.c:378
Code: a4 00 00 00 41 bc 01 00 00 00 e8 41 8f 2a 00 44 89 e0 5b 5d 41 5c 41 5d c3 e8 32 8f 2a 00 0f 0b e9 7e fe ff ff e8 26 8f 2a 00 <0f> 0b e9 ee fe ff ff 48 89 ef e8 f7 57 67 00 e9 b8 fe ff ff 48 89
RSP: 0018:ffffc900044d7c68 EFLAGS: 00010093
RAX: ffff88809ddcc5c0 RBX: 0000000000000000 RCX: ffffffff814794d7
RDX: 0000000000000000 RSI: ffffffff814795fa RDI: 0000000000000005
RBP: ffff8880a2606160 R08: ffff88809ddcc5c0 R09: fffff5200089af90
R10: fffff5200089af8f R11: 0000000000000003 R12: ffff8880a26060c0
R13: 0000000000040000 R14: ffff88809ddcc5c0 R15: ffff88808a3f4040
 do_signal_stop+0x1df/0x840 kernel/signal.c:2372
 get_signal+0x100a/0x24e0 kernel/signal.c:2597
 do_signal+0x7e/0x13f0 arch/x86/kernel/signal.c:813
 exit_to_usermode_loop+0x26c/0x360 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_64+0x6b1/0x7d0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: Bad RIP value.
RSP: 002b:00007fb4c4c27c78 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffea RBX: 00007fb4c4c286d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000000a6 R14: 00000000004c3391 R15: 000000000076bfac
Kernel Offset: disabled
Rebooting in 86400 seconds..