syzbot

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kcov->t != t
WARNING: kernel/kcov.c:483 at kcov_task_exit+0xf5/0x160 kernel/kcov.c:483, CPU#1: udevd/22894
Modules linked in:
CPU: 1 UID: 0 PID: 22894 Comm: udevd Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:kcov_task_exit+0xf5/0x160 kernel/kcov.c:483
Code: 10 00 00 48 8b bb 90 00 00 00 e8 16 5b 54 00 48 89 df 5b 41 5e 41 5f e9 d9 32 5a 00 7c 1c 5b 41 5e 41 5f e9 8d 91 62 09 cc 90 <0f> 0b 90 4c 89 f7 5b 41 5e 41 5f e9 eb 2a 61 09 48 89 df be 03 00
RSP: 0018:ffffc90005417d20 EFLAGS: 00010283
RAX: 9f731e912c601a00 RBX: ffff8880332de700 RCX: 0000000000000000
RDX: 00000000b9174e89 RSI: ffffffff8ba671e0 RDI: 00000000ffffffff
RBP: ffffc90005417e78 R08: ffffffff8b25a1d0 R09: ffffffff8ddcba80
R10: dffffc0000000000 R11: fffffbfff1ed4bb7 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8880332de708 R15: ffff8880503b3d00
FS:  00007fcb8f482880(0000) GS:ffff888126439000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005592c380fa30 CR3: 000000003733e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 do_exit+0x150/0x23c0 kernel/exit.c:909
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1118
 __do_sys_exit_group kernel/exit.c:1129 [inline]
 __se_sys_exit_group kernel/exit.c:1127 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1127
 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+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb8f5ba6c5
Code: ff ff ff 64 89 02 eb d2 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 35 21 f7 0f 00 ba e7 00 00 00 eb 03 66 90 f4 89 d0 0f 05 <48> 3d 00 f0 ff ff 76 f3 f7 d8 64 89 06 eb ec 66 2e 0f 1f 84 00 00
RSP: 002b:00007fffc8a3c728 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00005592c37fff60 RCX: 00007fcb8f5ba6c5
RDX: 00000000000000e7 RSI: fffffffffffffe68 RDI: 0000000000000000
RBP: 00005592c37df910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffc8a3c770 R14: 0000000000000000 R15: 0000000000000000
 </TASK>