------------[ cut here ]------------ WARNING: CPU: 1 PID: 24 at kernel/kcov.c:871 kcov_remote_start+0x5a2/0x7e0 kernel/kcov.c:871 Modules linked in: CPU: 1 PID: 24 Comm: ksoftirqd/1 Not tainted 6.10.0-rc7-syzkaller-00003-g4376e966ecb7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:kcov_remote_start+0x5a2/0x7e0 kernel/kcov.c:871 Code: 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 0f 85 a6 01 00 00 41 f7 c6 00 02 00 00 0f 84 93 fa ff ff fb e9 8d fa ff ff 90 <0f> 0b 90 e8 56 1e e7 09 89 c0 48 c7 c7 c8 d4 02 00 48 03 3c c5 e0 RSP: 0018:ffffc90000a18930 EFLAGS: 00010002 RAX: 0000000080010302 RBX: ffff8880176e8000 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: ffffffff8bcaccc0 RDI: ffffffff8c1f15c0 RBP: 0100000000000004 R08: ffffffff92f715f7 R09: 1ffffffff25ee2be R10: dffffc0000000000 R11: fffffbfff25ee2bf R12: ffffffff8196306e R13: ffff8880241c3d00 R14: 0000000000000006 R15: ffff8880b952d4c8 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020030000 CR3: 0000000029ab4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcov_remote_start_usb include/linux/kcov.h:55 [inline] kcov_remote_start_usb_softirq include/linux/kcov.h:89 [inline] __usb_hcd_giveback_urb+0x405/0x6e0 drivers/usb/core/hcd.c:1649 dummy_timer+0x830/0x45d0 drivers/usb/gadget/udc/dummy_hcd.c:1987 __run_hrtimer kernel/time/hrtimer.c:1689 [inline] __hrtimer_run_queues+0x59b/0xd50 kernel/time/hrtimer.c:1753 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x5d/0x70 kernel/kcov.c:225 Code: f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 RSP: 0018:ffffc900001e6d00 EFLAGS: 00000283 RAX: ffffffff8140f66c RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc900022e2000 RSI: 00000000000002bb RDI: 00000000000002bc RBP: 1ffff9200003cdbc R08: ffffffff8140f500 R09: ffffc900001e6ed0 R10: 0000000000000003 R11: ffffffff8181dca0 R12: ffffffff901f6d20 R13: dffffc0000000000 R14: 1ffff9200003cdbc R15: ffffffff90c34c22 unwind_next_frame+0x67c/0x2a00 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4438 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4513 ieee80211_rx_handlers+0x3f3d/0xb820 net/mac80211/rx.c:4208 ieee80211_invoke_rx_handlers net/mac80211/rx.c:4235 [inline] ieee80211_prepare_and_rx_handle+0x31ab/0x6360 net/mac80211/rx.c:5083 __ieee80211_rx_handle_packet net/mac80211/rx.c:5324 [inline] ieee80211_rx_list+0x2cde/0x3780 net/mac80211/rx.c:5459 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5482 ieee80211_rx include/net/mac80211.h:5093 [inline] ieee80211_handle_queued_frames+0xe7/0x1e0 net/mac80211/main.c:438 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:785 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:928 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ---------------- Code disassembly (best guess): 0: f8 clc 1: 15 00 00 83 fa adc $0xfa830000,%eax 6: 02 75 21 add 0x21(%rbp),%dh 9: 48 8b 91 00 16 00 00 mov 0x1600(%rcx),%rdx 10: 48 8b 32 mov (%rdx),%rsi 13: 48 8d 7e 01 lea 0x1(%rsi),%rdi 17: 8b 89 fc 15 00 00 mov 0x15fc(%rcx),%ecx 1d: 48 39 cf cmp %rcx,%rdi 20: 73 08 jae 0x2a 22: 48 89 3a mov %rdi,(%rdx) 25: 48 89 44 f2 08 mov %rax,0x8(%rdx,%rsi,8) * 2a: c3 ret <-- trapping instruction 2b: cc int3 2c: cc int3 2d: cc int3 2e: cc int3 2f: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 36: 00 00 00 39: 0f 1f 40 00 nopl 0x0(%rax) 3d: 90 nop 3e: 90 nop 3f: 90 nop