------------[ cut here ]------------ WARNING: CPU: 0 PID: 15 at kernel/kcov.c:870 kcov_remote_start+0x274/0x6e0 kernel/kcov.c:870 Modules linked in: CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.10.0-rc2-syzkaller-00024-g5821bf2dffbe #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:kcov_remote_start+0x274/0x6e0 kernel/kcov.c:870 Code: c0 22 49 89 47 08 e9 87 00 00 00 f6 c4 01 0f 85 06 fe ff ff e9 dc fd ff ff 44 8b 95 54 15 00 00 45 85 d2 0f 84 d5 fe ff ff 90 <0f> 0b 90 e9 b9 00 00 00 65 8b 05 55 72 b0 7e 49 c7 c0 2e e4 04 88 RSP: 0018:ffffc90000007b48 EFLAGS: 00010002 RAX: 0000000080010100 RBX: 000000000002d428 RCX: 0000000000000001 RDX: 0000000000000002 RSI: ffffffff86c7d9a0 RDI: ffffffff86e78600 RBP: ffff8881016a3a00 R08: 0000000000000000 R09: fffffbfff19989a6 R10: 0000000000000001 R11: 0000000000000002 R12: ffff8881f642d428 R13: 0000000000000000 R14: 0100000000000005 R15: ffff8881016a3a00 FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa879e3f070 CR3: 0000000136b04000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcov_remote_start_usb include/linux/kcov.h:53 [inline] kcov_remote_start_usb_softirq include/linux/kcov.h:66 [inline] __usb_hcd_giveback_urb+0x331/0x5c0 drivers/usb/core/hcd.c:1647 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1732 dummy_timer+0x17f6/0x3900 drivers/usb/gadget/udc/dummy_hcd.c:1987 __run_hrtimer kernel/time/hrtimer.c:1687 [inline] __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1751 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1813 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x8b/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:kcov_remote_start+0x3e1/0x6e0 kernel/kcov.c:924 Code: 89 e8 c3 71 0d 01 e9 4b ff ff ff e8 39 2a 07 00 e9 a9 fc ff ff e8 ff 2b 07 00 9c 58 f6 c4 02 0f 85 50 02 00 00 fb 48 83 c4 18 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc be 02 00 00 00 4c 89 RSP: 0018:ffffc900000ffa08 EFLAGS: 00000282 RAX: 0000000000000002 RBX: ffff8881f642d428 RCX: 1ffffffff199cd2a RDX: 0000000000000000 RSI: ffffffff86c7d6a0 RDI: ffffffff86e78600 RBP: ffff8881016a3a00 R08: 0000000000000001 R09: fffffbfff19989a6 R10: ffffffff8ccc4d37 R11: 0000000000000003 R12: ffff88811b4d8400 R13: 0000000000000200 R14: 0000000000040000 R15: ffffc90001002000 kcov_remote_start_usb include/linux/kcov.h:53 [inline] kcov_remote_start_usb_softirq include/linux/kcov.h:66 [inline] __usb_hcd_giveback_urb+0x331/0x5c0 drivers/usb/core/hcd.c:1647 usb_giveback_urb_bh+0x28f/0x570 drivers/usb/core/hcd.c:1682 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] bh_worker+0x5a4/0x8a0 kernel/workqueue.c:3572 workqueue_softirq_action+0x12c/0x190 kernel/workqueue.c:3599 tasklet_hi_action+0x17/0x70 kernel/softirq.c:816 handle_softirqs+0x209/0x8e0 kernel/softirq.c:554 run_ksoftirqd kernel/softirq.c:928 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:920 smpboot_thread_fn+0x661/0xa10 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: e8 c3 71 0d 01 call 0x10d71c8 5: e9 4b ff ff ff jmp 0xffffff55 a: e8 39 2a 07 00 call 0x72a48 f: e9 a9 fc ff ff jmp 0xfffffcbd 14: e8 ff 2b 07 00 call 0x72c18 19: 9c pushf 1a: 58 pop %rax 1b: f6 c4 02 test $0x2,%ah 1e: 0f 85 50 02 00 00 jne 0x274 24: fb sti 25: 48 83 c4 18 add $0x18,%rsp * 29: 5b pop %rbx <-- trapping instruction 2a: 5d pop %rbp 2b: 41 5c pop %r12 2d: 41 5d pop %r13 2f: 41 5e pop %r14 31: 41 5f pop %r15 33: c3 ret 34: cc int3 35: cc int3 36: cc int3 37: cc int3 38: be 02 00 00 00 mov $0x2,%esi 3d: 4c rex.WR 3e: 89 .byte 0x89