------------[ cut here ]------------
WARNING: CPU: 3 PID: 12781 at kernel/kcov.c:871 kcov_remote_start+0x274/0x6e0 kernel/kcov.c:871
Modules linked in:
CPU: 3 PID: 12781 Comm: syz.0.2694 Not tainted 6.10.0-rc7-syzkaller-00012-g34afb82a3c67 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:kcov_remote_start+0x274/0x6e0 kernel/kcov.c:871
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 1c 16 00 00 45 85 d2 0f 84 d5 fe ff ff 90 <0f> 0b 90 e9 b9 00 00 00 65 8b 05 55 e4 75 7e 49 c7 c0 d2 d4 3a 8d
RSP: 0018:ffffc90000907d50 EFLAGS: 00010002
RAX: 0000000080010303 RBX: 000000000002d648 RCX: ffffffff816ae7ce
RDX: 0000000000000002 RSI: ffffffff8b2cb200 RDI: ffffffff8b8ff640
RBP: ffff88801f14c880 R08: 0000000000000000 R09: fffffbfff284ca67
R10: 0000000000000001 R11: 0000000000000005 R12: ffff88806b32d648
R13: 0000000000000000 R14: 0100000000000007 R15: ffff88801f14c880
FS: 00007f1bc5a246c0(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1bc4b5b740 CR3: 000000003d63e000 CR4: 0000000000350ef0
DR0: 0000000000002800 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+0x35b/0x6e0 drivers/usb/core/hcd.c:1649
usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
dummy_timer+0x17f6/0x3900 drivers/usb/gadget/udc/dummy_hcd.c:1987
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
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+0x43/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:preempt_count_sub+0xcb/0x160 kernel/sched/core.c:5902
Code: 8b 15 fd dc 86 0e 85 d2 75 19 90 48 c7 c6 60 22 2c 8b 48 c7 c7 a0 22 2c 8b e8 e1 71 f2 ff 90 0f 0b 90 90 90 5b c3 cc cc cc cc <84> c0 75 8b 90 e8 0b 2a 22 03 85 c0 74 34 48 c7 c0 d4 69 e4 8f 48
RSP: 0018:ffffc900009082c0 EFLAGS: 00000297
RAX: 0000000080000303 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000303 RSI: ffffffff813ce8e5 RDI: 0000000000000001
RBP: ffffc90003ae7938 R08: 0000000000000006 R09: ffffc90003ae7928
R10: ffffc90003ae7938 R11: 0000000000000005 R12: ffffc90003ae0000
R13: ffffc90003ae8000 R14: ffffc90003ae7940 R15: ffffc90003ae7928
unwind_next_frame+0x11ef/0x23a0 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 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+0x12f/0x3a0 mm/slub.c:4513
kfree_skbmem+0x10e/0x200 net/core/skbuff.c:1131
__kfree_skb net/core/skbuff.c:1188 [inline]
kfree_skb_reason+0x138/0x210 net/core/skbuff.c:1223
ieee80211_rx_cooked_monitor net/mac80211/rx.c:4118 [inline]
ieee80211_rx_handlers_result+0x318/0x960 net/mac80211/rx.c:4149
ieee80211_rx_handlers+0xeb1/0x9a50 net/mac80211/rx.c:4208
ieee80211_invoke_rx_handlers net/mac80211/rx.c:4235 [inline]
ieee80211_prepare_and_rx_handle+0x2b6a/0x6ec0 net/mac80211/rx.c:5083
ieee80211_rx_for_interface+0x10a/0x1f0 net/mac80211/rx.c:5168
__ieee80211_rx_handle_packet net/mac80211/rx.c:5324 [inline]
ieee80211_rx_list+0x10e2/0x2e90 net/mac80211/rx.c:5459
ieee80211_rx_napi+0xdd/0x400 net/mac80211/rx.c:5482
ieee80211_rx include/net/mac80211.h:5093 [inline]
ieee80211_handle_queued_frames+0xd5/0x130 net/mac80211/main.c:438
tasklet_action_common.constprop.0+0x24c/0x3e0 kernel/softirq.c:785
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
do_softirq kernel/softirq.c:455 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:442
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:382
ieee80211_tx_skb_tid+0x176/0x4f0 net/mac80211/tx.c:6131
ieee80211_mgmt_tx+0x14fc/0x2360 net/mac80211/offchannel.c:989
rdev_mgmt_tx net/wireless/rdev-ops.h:762 [inline]
cfg80211_mlme_mgmt_tx+0x7d4/0x1660 net/wireless/mlme.c:937
nl80211_tx_mgmt+0x7f9/0xd40 net/wireless/nl80211.c:12655
genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2564
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0xab5/0xc90 net/socket.c:2585
___sys_sendmsg+0x135/0x1e0 net/socket.c:2639
__sys_sendmsg+0x117/0x1f0 net/socket.c:2668
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1bc4b75bd9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1bc5a24048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1bc4d03f60 RCX: 00007f1bc4b75bd9
RDX: 0000000000000000 RSI: 00000000200004c0 RDI: 0000000000000004
RBP: 00007f1bc4be4e60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1bc4d03f60 R15: 00007ffd9ed49318
----------------
Code disassembly (best guess):
0: 8b 15 fd dc 86 0e mov 0xe86dcfd(%rip),%edx # 0xe86dd03
6: 85 d2 test %edx,%edx
8: 75 19 jne 0x23
a: 90 nop
b: 48 c7 c6 60 22 2c 8b mov $0xffffffff8b2c2260,%rsi
12: 48 c7 c7 a0 22 2c 8b mov $0xffffffff8b2c22a0,%rdi
19: e8 e1 71 f2 ff call 0xfff271ff
1e: 90 nop
1f: 0f 0b ud2
21: 90 nop
22: 90 nop
23: 90 nop
24: 5b pop %rbx
25: c3 ret
26: cc int3
27: cc int3
28: cc int3
29: cc int3
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 75 8b jne 0xffffffb9
2e: 90 nop
2f: e8 0b 2a 22 03 call 0x3222a3f
34: 85 c0 test %eax,%eax
36: 74 34 je 0x6c
38: 48 c7 c0 d4 69 e4 8f mov $0xffffffff8fe469d4,%rax
3f: 48 rex.W