INFO: task syz-executor:11094 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc4-syzkaller-00059-gc67e9601e29a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D
 stack:26848 pid:11094 tgid:11094 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x105f/0x34b0 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6782
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 __sys_sendto+0x479/0x4d0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2222
 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: 0033:0x7f0548b20553
RSP: 002b:00007ffc759ee2e8 EFLAGS: 00000202
 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f0549804620 RCX: 00007f0548b20553
RDX: 000000000000002c RSI: 00007f0549804670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffc759ee304 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f0549804670 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:11097 blocked for more than 144 seconds.
      Not tainted 6.12.0-rc4-syzkaller-00059-gc67e9601e29a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:28112 pid:11097 tgid:11097 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x105f/0x34b0 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6782
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 __sys_sendto+0x479/0x4d0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2222
 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: 0033:0x7fa69fdc0553
RSP: 002b:00007ffda0ac15a8 EFLAGS: 00000202
 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fa6a0aa4620 RCX: 00007fa69fdc0553
RDX: 0000000000000028 RSI: 00007fa6a0aa4670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffda0ac15c4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fa6a0aa4670 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
5 locks held by kworker/0:1/9:
1 lock held by khungtaskd/30:
 #0: ffffffff88ebb140
 (
rcu_read_lock
){....}-{1:2}
, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
3 locks held by kworker/u8:2/36:
 #0: ffff888112060948
 (
(wq_completion)ipv6_addrconf
){+.+.}-{0:0}
, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
 #1: 
ffffc90000267d80
 (
(work_completion)(&(&net->ipv6.addr_chk_work)->work)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
 #2: ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4736
4 locks held by kworker/u8:3/45:
 #0: ffff888100abb148
 (
(wq_completion)netns
){+.+.}-{0:0}
, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
 #1: ffffc90000507d80
 (
net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
 #2: ffffffff8a18cb90
 (
pernet_ops_rwsem
){++++}-{3:3}
, at: cleanup_net+0xbb/0xb40 net/core/net_namespace.c:580
 #3: 
ffffffff8a1a24a8 (
rtnl_mutex
){+.+.}-{3:3}
, at: cleanup_net+0x503/0xb40 net/core/net_namespace.c:616
8 locks held by kworker/0:2/2822:
2 locks held by getty/2919:
 #0: 
ffff8881121bf0a0
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000432f0
 (
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by kworker/1:4/5241:
 #0: 
ffff888100080948
 (
(wq_completion)events
){+.+.}-{0:0}
, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
 #1: ffffc90004befd80
 (
free_ipc_work
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
5 locks held by kworker/0:3/5245:
5 locks held by kworker/0:5/5354:
4 locks held by udevd/5635:
 #0: 
ffff888120da69e0 (
&p->lock){+.+.}-{3:3}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
 #1: 
ffff8881141dcc88
 (
&of->mutex
){+.+.}-{3:3}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
 #2: ffff88812e8621e8
 (
kn->active
#18
){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
 #3: 
ffff8881311e0190
 (
&dev->mutex
){....}-{3:3}
, at: device_lock_interruptible include/linux/device.h:1019 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
5 locks held by kworker/0:6/6344:
4 locks held by udevd/8343:
 #0: 
ffff88811d9602f0
 (
&p->lock
){+.+.}-{3:3}
, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
 #1: 
ffff888132723088
 (
&of->mutex
){+.+.}-{3:3}
, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
 #2: 
ffff88811f6f2968 (
kn->active#18
){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
 #3: 
ffff88811ddce190
 (
&dev->mutex){....}-{3:3}
, at: device_lock_interruptible include/linux/device.h:1019 [inline]
, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
1 lock held by syz.3.1751/11090:
 #0: 
ffffffff88ec6a38
 (
rcu_state.exp_mutex){+.+.}-{3:3}
, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
1 lock held by syz-executor/11094:
 #0: 
ffffffff8a1a24a8
 (rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11097:
 #0: 
ffffffff8a1a24a8 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11113:
 #0: 
ffffffff8a1a24a8 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11115:
 #0: 
ffffffff8a1a24a8 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11117:
 #0: 
ffffffff8a1a24a8 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11125:
 #0: 
ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11127:
 #0: ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11134:
 #0: ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11136:
 #0: ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11138:
 #0: ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11145:
 #0: 
ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11147:
 #0: 
ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11155:
 #0: 
ffffffff8a1a24a8
 (
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11157:
 #0: 
ffffffff8a1a24a8
 (
rtnl_mutex){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/11160:
 #0: 
ffffffff8a1a24a8
 (rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc4-syzkaller-00059-gc67e9601e29a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xf0c/0x1240 kernel/hung_task.c:379
 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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
imon 2-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 2822 Comm: kworker/0:2 Not tainted 6.12.0-rc4-syzkaller-00059-gc67e9601e29a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_power_efficient gc_worker
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x11/0x90 kernel/kcov.c:246
Code: cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 49 89 f8 49 89 f1 65 48 8b 15 af d0 ad 7e <65> 8b 05 b0 d0 ad 7e a9 00 01 ff 00 74 1d f6 c4 01 74 67 a9 00 00
RSP: 0018:ffffc90000007098 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff8728c780 RCX: ffffffff86e6ad0f
RDX: ffff888114eb8000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 000000000000005b R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000005b R11: 000000000039b100 R12: ffffc900000071a0
R13: ffffffff8728c780 R14: ffffc90000007238 R15: ffffc90000007400
FS:  0000000000000000(0000) GS:ffff8881f5800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04d14018a0 CR3: 000000011680a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 format_decode+0x13f/0xba0 lib/vsprintf.c:2537
 vsnprintf+0x13d/0x1880 lib/vsprintf.c:2755
 sprintf+0xcd/0x110 lib/vsprintf.c:3007
 print_time kernel/printk/printk.c:1362 [inline]
 info_print_prefix+0x25c/0x350 kernel/printk/printk.c:1388
 record_print_text+0x141/0x400 kernel/printk/printk.c:1437
 printk_get_next_message+0x2a6/0x670 kernel/printk/printk.c:2978
 console_emit_next_record kernel/printk/printk.c:3046 [inline]
 console_flush_all+0x6ec/0xc60 kernel/printk/printk.c:3180
 __console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
 console_unlock+0xd9/0x210 kernel/printk/printk.c:3279
 vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2407
 dev_vprintk_emit drivers/base/core.c:4910 [inline]
 dev_printk_emit+0xfb/0x140 drivers/base/core.c:4921
 __dev_printk+0xf5/0x270 drivers/base/core.c:4933
 _dev_warn+0xe5/0x120 drivers/base/core.c:4977
 usb_rx_callback_intf0+0x11c/0x1a0 drivers/media/rc/imon.c:1768
 __usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650
 usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
 dummy_timer+0x17f0/0x3930 drivers/usb/gadget/udc/dummy_hcd.c:1993
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1755
 hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1772
 handle_softirqs+0x206/0x8d0 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+0xac/0x110 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:__might_resched+0x3d2/0x5e0 kernel/sched/core.c:8617
Code: 48 c7 c6 60 83 27 87 48 c7 c7 a0 83 27 87 e8 15 dd 0d 00 e8 e0 e6 b6 05 31 f6 bf 09 00 00 00 e8 94 b7 f2 ff e9 3a fd ff ff 9c <58> f6 c4 02 0f 84 f3 fc ff ff 65 4c 8b 35 4c b8 db 7e 49 8d 7e 2c
RSP: 0018:ffffc90004c8fb38 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92000991f6a RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8727f520 RDI: ffff888114eb83fc
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff14ac9d9
R10: ffffffff8a564ecf R11: 0000000000000000 R12: ffffffff87fc8380
R13: 000000000000064a R14: 0000000000000000 R15: ffff888114eb8000
 gc_worker+0xa36/0x1760 net/netfilter/nf_conntrack_core.c:1610
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 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
 </TASK>