------------[ cut here ]------------ in_task() && kcov_mode_enabled(mode) WARNING: kernel/kcov.c:872 at kcov_remote_start+0x5d8/0x710 kernel/kcov.c:872, CPU#1: kworker/1:0/31 Modules linked in: CPU: 1 UID: 0 PID: 31 Comm: kworker/1:0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:kcov_remote_start+0x5d8/0x710 kernel/kcov.c:872 Code: 00 5b 41 5c 41 5d 41 5e 41 5f 5d e9 f2 9a c6 02 90 0f 0b 90 e9 62 fa ff ff 90 0f 0b 90 0f b7 83 80 04 00 00 e9 a3 fa ff ff 90 <0f> 0b 90 eb 04 90 0f 0b 90 e8 2a 9a 2e 09 89 c0 48 c7 c7 a0 f3 02 RSP: 0018:ffffc90000a5f768 EFLAGS: 00010202 RAX: 0000000000000002 RBX: ffff88801cae5ac0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8b65e6e0 RDI: ffffffff8b65e6a0 RBP: ffffc90000a5fa70 R08: ffffffff8af23b60 R09: ffffffff8d9c7780 R10: dffffc0000000000 R11: fffffbfff1e4f72f R12: ffff888143f78000 R13: dffffc0000000000 R14: 0100000000000001 R15: ffff888028636000 FS: 0000000000000000(0000) GS:ffff8881268fa000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fb7dc0a7a0 CR3: 000000000d7b4000 CR4: 00000000003526f0 Call Trace: kcov_remote_start_usb include/linux/kcov.h:55 [inline] hub_event+0x150/0x4f60 drivers/usb/core/hub.c:5889 process_one_work kernel/workqueue.c:3257 [inline] process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340 worker_thread+0x89f/0xd90 kernel/workqueue.c:3421 kthread+0x726/0x8b0 kernel/kthread.c:463 ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246