INFO: task syz-executor.2:11770 blocked for more than 143 seconds.
Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25440 pid:11770 tgid:11770 ppid:1 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xc71/0x3050 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe7/0x270 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747
rtnl_lock net/core/rtnetlink.c:79 [inline]
rtnetlink_rcv_msg+0x372/0xe00 net/core/rtnetlink.c:6555
netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545
netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368
netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0xd5/0x180 net/socket.c:745
__sys_sendto+0x255/0x340 net/socket.c:2194
__do_sys_sendto net/socket.c:2206 [inline]
__se_sys_sendto net/socket.c:2202 [inline]
__x64_sys_sendto+0xe0/0x1b0 net/socket.c:2202
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f3963e58783
RSP: 002b:00007ffd25222ee8 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3964a9e620 RCX: 00007f3963e58783
RDX: 000000000000002c RSI: 00007f3964a9e670 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007ffd25222f04 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f3964a9e670 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff87ead560 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff87ead560 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff87ead560 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
4 locks held by kworker/u4:5/141:
#0: ffff888101a6cd38 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc9000161fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffffffff88fa2a50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb20 net/core/net_namespace.c:576
#3: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: sit_exit_batch_net+0x8c/0x5b0 net/ipv6/sit.c:1883
3 locks held by kworker/1:2/719:
#0: ffff88810af08138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90001dffd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4679
2 locks held by dhcpcd/2432:
#0: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x1d3/0x1f00 net/ipv4/devinet.c:1091
#1: ffff8881182fcdb0 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x32/0x820 drivers/staging/rtl8712/os_intfs.c:392
2 locks held by getty/2452:
#0: ffff88810b35c0a0 (&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+0xfc6/0x1490 drivers/tty/n_tty.c:2201
6 locks held by kworker/1:4/5360:
#0: ffff888109649138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90002bafd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffff888105bc9190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#2: ffff888105bc9190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5791
#3: ffff88811cb9e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#3: ffff88811cb9e190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x910 drivers/usb/core/hub.c:2251
#4: ffff888111ab9160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
#4: ffff888111ab9160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
#4: ffff888111ab9160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
#5: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0x12/0x30 net/core/dev.c:11056
3 locks held by kworker/0:7/5445:
#0: ffff88810af08138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x787/0x15c0 kernel/workqueue.c:2605
#1: ffffc90003637d80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7e9/0x15c0 kernel/workqueue.c:2606
#2: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4679
1 lock held by syz-executor.2/11770:
#0: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe00 net/core/rtnetlink.c:6555
1 lock held by syz-executor.2/12086:
#0: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe00 net/core/rtnetlink.c:6555
1 lock held by syz-executor.2/12090:
#0: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff88fb7a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe00 net/core/rtnetlink.c:6555
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x26c/0x2d0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
RIP: 0010:lock_is_held_type+0x59/0x140 kernel/locking/lockdep.c:5823
Code: 0f 85 cb 00 00 00 65 4c 8b 24 25 40 ab 03 00 41 8b 94 24 74 0a 00 00 85 d2 0f 85 b2 00 00 00 48 89 fd 41 89 f6 9c 8f 04 24 fa <48> c7 c7 80 d4 87 86 45 31 ff e8 38 10 00 00 41 8b 84 24 70 0a 00
RSP: 0018:ffffc90000007ce8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8881f663b580 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffff8881f663b598
RBP: ffff8881f663b598 R08: ffff8881f663bfc0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87c2b900
R13: 00000000ffffffff R14: 00000000ffffffff R15: ffffffff87c2b900
FS: 0000000000000000(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe2600dad8 CR3: 000000011266c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_is_held include/linux/lockdep.h:288 [inline]
lockdep_assert_rq_held kernel/sched/sched.h:1340 [inline]
rq_clock_task kernel/sched/sched.h:1492 [inline]
_update_idle_rq_clock_pelt kernel/sched/pelt.h:75 [inline]
update_rq_clock_pelt kernel/sched/pelt.h:98 [inline]
update_rq_clock_task kernel/sched/core.c:747 [inline]
update_rq_clock kernel/sched/core.c:769 [inline]
update_rq_clock+0x426/0x6b0 kernel/sched/core.c:750
update_blocked_averages+0xf4/0x1be0 kernel/sched/fair.c:9255
update_nohz_stats kernel/sched/fair.c:11922 [inline]
_nohz_idle_balance.isra.0+0x529/0x700 kernel/sched/fair.c:11990
__do_softirq+0x20a/0x94b kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xa7/0x110 kernel/softirq.c:644
sysvec_call_function_single+0x8e/0xb0 arch/x86/kernel/smp.c:262
asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:652
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x1b/0x20 drivers/acpi/processor_idle.c:113
Code: ed c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 65 48 8b 04 25 40 ab 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d f7 69 61 00 fb f4 c3 0f 1f 00 0f b6 47 08 3c 01 74 0b 3c 02 74 05 8b 7f 04 eb 9f
RSP: 0018:ffffffff87c07d68 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff864daf7e
RDX: 0000000000000001 RSI: ffff888105e6c800 RDI: ffff888105e6c864
RBP: ffff888105e6c864 R08: 0000000000000001 R09: ffffed103ecc6d75
R10: ffff8881f6636bab R11: 0000000000000000 R12: ffff888103a93000
R13: ffffffff882ff7a0 R14: 0000000000000000 R15: 0000000000000000
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x82/0x500 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
cpuidle_idle_call kernel/sched/idle.c:215 [inline]
do_idle+0x315/0x3f0 kernel/sched/idle.c:282
cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:380
rest_init+0x16f/0x2b0 init/main.c:730
arch_call_rest_init+0x13/0x30 init/main.c:827
start_kernel+0x39a/0x470 init/main.c:1072
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555
x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x166/0x16b