------------[ cut here ]------------
WARNING: CPU: 3 PID: 1090 at kernel/kcov.c:870 kcov_remote_start+0x274/0x6e0 kernel/kcov.c:870
Modules linked in:
CPU: 3 PID: 1090 Comm: kworker/u32:6 Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: netns cleanup_net
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 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 35 f4 75 7e 49 c7 c0 7a e6 3a 8d
RSP: 0018:ffffc900009085f0 EFLAGS: 00010002
RAX: 0000000000010101 RBX: 000000000002d648 RCX: ffffffff816ad54e
RDX: 0000000000000002 RSI: ffffffff8b2cb0e0 RDI: ffffffff8b8fffc0
RBP: ffff8880234f0000 R08: 0000000000000000 R09: fffffbfff284d667
R10: 0000000000000001 R11: 0000000000000006 R12: ffff88806b32d648
R13: 0000000000000000 R14: 0100000000000006 R15: ffff8880234f0000
FS: 0000000000000000(0000) GS:ffff88806b300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000003e546000 CR4: 0000000000352ef0
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+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:kcov_remote_start+0x3e1/0x6e0 kernel/kcov.c:924
Code: 8f e8 93 92 24 03 e9 4b ff ff ff e8 09 3e 07 00 e9 a9 fc ff ff e8 cf 3f 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:ffffc90000908b60 EFLAGS: 00000296
RAX: 0000000000000006 RBX: ffff88806b32d648 RCX: 1ffffffff28536ce
RDX: 0000000000000000 RSI: ffffffff8b2cade0 RDI: ffffffff8b8fffc0
RBP: ffff8880234f0000 R08: 0000000000000001 R09: fffffbfff284d667
R10: ffffffff9426b33f R11: 0000000000000007 R12: ffff8880255fc300
R13: 0000000000000200 R14: 0000000000040000 R15: ffffc90001cc4000
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+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5722
Code: c1 05 9a bf 96 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000462fa68 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920008c5f4f RCX: ffffffff816ad54e
RDX: 0000000000000001 RSI: ffffffff8b2cb0e0 RDI: ffffffff8b8fffc0
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff284d659
R10: ffffffff9426b2cf R11: 0000000000000003 R12: 0000000000000001
R13: 0000000000000000 R14: ffffffff8ddf3d58 R15: 0000000000000000
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
unregister_sysctl_table fs/proc/proc_sysctl.c:1519 [inline]
unregister_sysctl_table+0x39/0x60 fs/proc/proc_sysctl.c:1512
__addrconf_sysctl_unregister net/ipv6/addrconf.c:7245 [inline]
addrconf_exit_net+0xa3/0x3f0 net/ipv6/addrconf.c:7366
ops_exit_list+0xb0/0x180 net/core/net_namespace.c:173
cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:640
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
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 93 92 24 03 call 0x3249298
5: e9 4b ff ff ff jmp 0xffffff55
a: e8 09 3e 07 00 call 0x73e18
f: e9 a9 fc ff ff jmp 0xfffffcbd
14: e8 cf 3f 07 00 call 0x73fe8
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