syzbot

------------[ cut here ]------------
kcov->t != t
WARNING: kernel/kcov.c:475 at kcov_task_exit+0x181/0x240 kernel/kcov.c:475, CPU#0: syz-executor/5596
Modules linked in:
CPU: 0 UID: 0 PID: 5596 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:kcov_task_exit+0x181/0x240 kernel/kcov.c:475
Code: 90 00 00 00 e8 50 cb 57 00 4c 89 f7 5b 41 5e 41 5f e9 f3 8b 5d 00 7c 40 5b 41 5e 41 5f e9 87 3c 80 09 cc 90 0f 0b 90 eb 10 90 <0f> 0b 90 eb 0a 90 0f 0b 90 eb 04 90 0f 0b 90 4c 89 ff 5b 41 5e 41
RSP: 0018:ffffc9000427fae0 EFLAGS: 00010287
RAX: dc062ef28912b800 RBX: ffff88803822be00 RCX: 0000000000000000
RDX: 00000000e8f3d702 RSI: ffffffff8bca5f60 RDI: 00000000ffffffff
RBP: ffffc9000427fc30 R08: ffffffff8b4409a0 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e1c3000 R12: 0000000000000009
R13: 0000000000000004 R14: ffff88803345eb00 R15: ffff88803345eb08
FS:  000055556e2ea500(0000) GS:ffff888125c4a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc20c63da08 CR3: 00000000382be000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 do_exit+0x159/0x2360 kernel/exit.c:937
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1147
 get_signal+0x121b/0x12c0 kernel/signal.c:3038
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x104/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline]
 do_syscall_64+0x353/0x580 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3c1bd9cf47
Code: 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcabcb88c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffff RBX: 000000000000184d RCX: 00007f3c1bd9cf47
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffcabcb8980
RBP: 00007ffcabcb8980 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007ffcabcb9a10
R13: 00007f3c1be332ca R14: 000055556e2ea4e8 R15: 0000000000000005
 </TASK>