syzbot

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kcov->t != t
WARNING: kernel/kcov.c:483 at kcov_task_exit+0xf5/0x160 kernel/kcov.c:483, CPU#0: syz.0.2668/16558
Modules linked in:
CPU: 0 UID: 0 PID: 16558 Comm: syz.0.2668 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:kcov_task_exit+0xf5/0x160 kernel/kcov.c:483
Code: 10 00 00 48 8b bb 90 00 00 00 e8 f6 b0 55 00 48 89 df 5b 41 5e 41 5f e9 19 6e 5b 00 7c 1c 5b 41 5e 41 5f e9 3d 39 6c 09 cc 90 <0f> 0b 90 4c 89 f7 5b 41 5e 41 5f e9 4b d2 6a 09 48 89 df be 03 00
RSP: 0018:ffffc900048a7d20 EFLAGS: 00010206
RAX: f73800b0e929b000 RBX: ffff888035dbfe00 RCX: 0000000000000000
RDX: 000000004f210036 RSI: ffffffff8ba73c40 RDI: 00000000ffffffff
RBP: ffffc900048a7e78 R08: ffffffff8b2f6740 R09: ffffffff8dfc80c0
R10: dffffc0000000000 R11: fffffbfff1f17a3f R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888035dbfe08 R15: ffff88802fab5c40
FS:  0000555586ae4500(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559c1f62e000 CR3: 0000000040c98000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 do_exit+0x150/0x22c0 kernel/exit.c:908
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117
 __do_sys_exit_group kernel/exit.c:1128 [inline]
 __se_sys_exit_group kernel/exit.c:1126 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1126
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd49143cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffc2dcd318 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd49143cdd9
RDX: 00007fd490691000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffc2dcd37c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000000a2
R13: 00000000000927c0 R14: 000000000012da21 R15: 00007fffc2dcd3d0
 </TASK>