------------[ cut here ]------------
WARNING: CPU: 1 PID: 9870 at kernel/signal.c:378 task_participate_group_stop+0x296/0x300 kernel/signal.c:378
Modules linked in:
CPU: 1 PID: 9870 Comm: 4 Not tainted 5.11.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:task_participate_group_stop+0x296/0x300 kernel/signal.c:378
Code: 7c 04 84 d2 75 72 41 89 9c 24 ac 00 00 00 41 bc 01 00 00 00 e9 07 ff ff ff e8 d6 9c 2c 00 0f 0b e9 fa fd ff ff e8 ca 9c 2c 00 <0f> 0b e9 ab fe ff ff 48 89 ef e8 0b 76 6f 00 e9 75 fe ff ff e8 b1
RSP: 0018:ffffc9000ad97c68 EFLAGS: 00010093
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88802b7a9bc0 RSI: ffffffff814637d6 RDI: 0000000000000003
RBP: ffff888017041aa8 R08: 0000000000000000 R09: 0000000000000003
R10: ffffffff81463670 R11: 0000000000000000 R12: ffff888017041a00
R13: ffff88802b7aa0c0 R14: 0000000000040000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000ffec8f6b CR3: 0000000035519000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_signal_stop+0x1f1/0x840 kernel/signal.c:2373
 get_signal+0xc26/0x20f0 kernel/signal.c:2631
 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0023:0xb7000000
Code: Unable to access opcode bytes at RIP 0xb6ffffd6.
RSP: 002b:00000000ffec8ea0 EFLAGS: 00000200 ORIG_RAX: 000000000000000b
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