INFO: task dhcpcd:4721 blocked for more than 144 seconds.
Not tainted 6.8.0-rc6-syzkaller-00011-g45ec2f5f6ed3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd state:D stack:24976 pid:4721 tgid:4721 ppid:1 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5bd/0x9d0 kernel/locking/mutex.c:752
vlan_ioctl_handler+0xcf/0xa80 net/8021q/vlan.c:553
sock_ioctl+0x4c4/0x6c0 net/socket.c:1305
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:871 [inline]
__se_sys_ioctl fs/ioctl.c:857 [inline]
__x64_sys_ioctl+0x193/0x220 fs/ioctl.c:857
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f331ad16d49
RSP: 002b:00007ffda9ad0ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000055b515d68ea0 RCX: 00007f331ad16d49
RDX: 00007ffda9ad0eb0 RSI: 0000000000008982 RDI: 0000000000000011
RBP: 0000000000000002 R08: 0000000000000008 R09: 0000000000000000
R10: 00007ffda9ae1530 R11: 0000000000000246 R12: 00007ffda9ad0eb0
R13: 00007ffda9ad0f70 R14: 000055b515d68ea0 R15: 000055b515dc4b70
INFO: task kworker/1:2:19635 blocked for more than 145 seconds.
Not tainted 6.8.0-rc6-syzkaller-00011-g45ec2f5f6ed3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2 state:D stack:22624 pid:19635 tgid:19635 ppid:2 flags:0x00004000
Workqueue: events switchdev_deferred_process_work
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5bd/0x9d0 kernel/locking/mutex.c:752
switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
process_one_work+0x889/0x15e0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Showing all locks held in the system:
3 locks held by kworker/1:1/27:
#0: ffff888014c8c938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608
#1: ffffc90000a2fd80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
#2: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:281
1 lock held by khungtaskd/29:
#0: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by dhcpcd/4721:
#0: ffffffff8f2bb3e8 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x4a8/0x6c0 net/socket.c:1303
#1: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: vlan_ioctl_handler+0xcf/0xa80 net/8021q/vlan.c:553
2 locks held by getty/4809:
#0: ffff88802b0b40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015d02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfca/0x1490 drivers/tty/n_tty.c:2201
7 locks held by syz-executor.4/5091:
#0: ffff8880b953cc98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
#1: ffff8880b9528a08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988
#2: ffff88802f982610 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x6c0 fs/inode.c:665
#3: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#3: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#3: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x42/0x540 mm/pgtable-generic.c:285
#4: ffffffff8d93fc00 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: fs_reclaim_acquire mm/page_alloc.c:3709 [inline]
#4: ffffffff8d93fc00 (mmu_notifier_invalidate_range_start){+.+.}-{0:0}, at: fs_reclaim_acquire+0xb0/0x150 mm/page_alloc.c:3700
#5: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#5: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#5: ffffffff8d7ad220 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x42/0x540 mm/pgtable-generic.c:285
#6: ffff888022fb36d8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_pte_range mm/memory.c:1059 [inline]
#6: ffff888022fb36d8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_pmd_range mm/memory.c:1187 [inline]
#6: ffff888022fb36d8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_pud_range mm/memory.c:1224 [inline]
#6: ffff888022fb36d8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_p4d_range mm/memory.c:1248 [inline]
#6: ffff888022fb36d8 (ptlock_ptr(ptdesc)#2/1){+.+.}-{2:2}, at: copy_page_range+0xd1d/0x3c60 mm/memory.c:1346
1 lock held by syz-executor.2/5093:
#0: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:697 [inline]
#0: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x250 drivers/net/tun.c:3505
3 locks held by kworker/1:8/5173:
#0: ffff88802a734d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608
#1: ffffc9000411fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
#2: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4686
6 locks held by kworker/u4:11/5783:
#0: ffff888014c8f938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608
#1: ffffc9000546fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
#2: ffffffff8f2cf810 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb20 net/core/net_namespace.c:580
#3: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x8f/0xb30 net/core/dev.c:11605
#4: ffff888022a72768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5932 [inline]
#4: ffff888022a72768 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: cfg80211_netdev_notifier_call+0xa3e/0x1090 net/wireless/core.c:1488
#5: ffffffff8d7b8a78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#5: ffffffff8d7b8a78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x6b5/0x800 kernel/rcu/tree_exp.h:995
3 locks held by kworker/1:2/19635:
#0: ffff888014c8c938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608
#1: ffffc9000dc0fd80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
#2: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
3 locks held by kworker/0:3/24308:
#0: ffff88802a734d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608
#1: ffffc9000510fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
#2: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4686
2 locks held by kworker/0:7/24328:
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608
#1: ffffc90003627d80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
2 locks held by kworker/u4:4/28564:
#0: ffff8880b953cc98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
#1: ffffc90013767d80 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609
2 locks held by syz-executor.3/28801:
#0: ffffffff8f2cf810 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cc/0x670 net/core/net_namespace.c:491
#1: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1b/0x230 drivers/net/wireguard/device.c:421
1 lock held by syz-executor.3/29123:
#0: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6615
1 lock held by syz-executor.3/29371:
#0: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6615
1 lock held by syz-executor.2/29429:
#0: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2e4be8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6615
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller-00011-g45ec2f5f6ed3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 24328 Comm: kworker/0:7 Not tainted 6.8.0-rc6-syzkaller-00011-g45ec2f5f6ed3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events delayed_vfree_work
RIP: 0010:hlock_class+0x56/0x130 kernel/locking/lockdep.c:228
Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 bf d4 93 e8 42 b5 7a 00 48 0f a3 1d 6a f0 6a 12 <73> 13 48 69 c3 c8 00 00 00 5b 48 05 e0 c3 d4 93 c3 cc cc cc cc 48
RSP: 0018:ffffc900036278e0 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 00000000000000e6 RCX: ffffffff8169cf4e
RDX: fffffbfff27a97fc RSI: 0000000000000008 RDI: ffffffff93d4bfd8
RBP: dffffc0000000000 R08: 0000000000000000 R09: fffffbfff27a97fb
R10: ffffffff93d4bfdf R11: 0000000000000002 R12: 0000000000000000
R13: ffffed100fbd3157 R14: ffff88807de98ac0 R15: 0000000000000004
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000d57a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
check_wait_context kernel/locking/lockdep.c:4798 [inline]
__lock_acquire+0x5f0/0x3b40 kernel/locking/lockdep.c:5087
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
rcu_read_lock include/linux/rcupdate.h:750 [inline]
page_ext_get+0x3a/0x310 mm/page_ext.c:508
__page_table_check_zero+0x139/0x5e0 mm/page_table_check.c:140
page_table_check_free include/linux/page_table_check.h:41 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x517/0xb10 mm/page_alloc.c:2346
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486
vfree+0x181/0x7a0 mm/vmalloc.c:2842
delayed_vfree_work+0x56/0x70 mm/vmalloc.c:2763
process_one_work+0x889/0x15e0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2706 [inline]
worker_thread+0x8b9/0x12a0 kernel/workqueue.c:2787
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243