INFO: task dhcpcd:4735 blocked for more than 143 seconds. Not tainted 6.8.0-rc4-next-20240214-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:20952 pid:4735 tgid:4735 ppid:4734 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17df/0x4a40 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6804 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6819 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6876 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 devinet_ioctl+0x2ce/0x1bc0 net/ipv4/devinet.c:1091 inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1000 sock_do_ioctl+0x158/0x460 net/socket.c:1222 sock_ioctl+0x629/0x8e0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f37fd954d49 RSP: 002b:00007ffdc5c55298 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f37fd8866c0 RCX: 00007f37fd954d49 RDX: 00007ffdc5c65488 RSI: 0000000000008914 RDI: 000000000000000e RBP: 00007ffdc5c75648 R08: 00007ffdc5c65448 R09: 00007ffdc5c653f8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdc5c65488 R14: 0000000000000028 R15: 0000000000008914 INFO: task kworker/1:7:16232 blocked for more than 143 seconds. Not tainted 6.8.0-rc4-next-20240214-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:7 state:D stack:23632 pid:16232 tgid:16232 ppid:2 flags:0x00004000 Workqueue: events_power_efficient crda_timeout_work Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17df/0x4a40 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6804 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6819 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6876 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 crda_timeout_work+0x15/0x50 net/wireless/reg.c:538 process_one_work kernel/workqueue.c:3146 [inline] process_scheduled_works+0x9d7/0x1730 kernel/workqueue.c:3226 worker_thread+0x86d/0xd70 kernel/workqueue.c:3307 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242 INFO: task kworker/1:8:16233 blocked for more than 143 seconds. Not tainted 6.8.0-rc4-next-20240214-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:8 state:D stack:22000 pid:16233 tgid:16233 ppid:2 flags:0x00004000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17df/0x4a40 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6804 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6819 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6876 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:75 process_one_work kernel/workqueue.c:3146 [inline] process_scheduled_works+0x9d7/0x1730 kernel/workqueue.c:3226 worker_thread+0x86d/0xd70 kernel/workqueue.c:3307 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e1315a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e1315a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e1315a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 3 locks held by kworker/u8:2/34: #0: ffff888029816948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #0: ffff888029816948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #1: ffffc90000aa7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #1: ffffc90000aa7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #2: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4689 5 locks held by kworker/u8:7/2430: #0: ffff888015ad5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #0: ffff888015ad5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #1: ffffc90009bd7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #1: ffffc90009bd7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #2: ffffffff8f37aed0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:591 #3: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: cleanup_net+0x6af/0xcc0 net/core/net_namespace.c:627 #4: ffffffff8e136938 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #4: ffffffff8e136938 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939 1 lock held by dhcpcd/4735: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1bc0 net/ipv4/devinet.c:1091 2 locks held by getty/4817: #0: ffff88802a10b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201 3 locks held by kworker/1:6/5149: #0: ffff888014c7d948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #0: ffff888014c7d948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #1: ffffc900041ffd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #1: ffffc900041ffd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #2: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x91/0xe50 net/wireless/reg.c:2479 3 locks held by kworker/1:7/16232: #0: ffff888014c7d948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #0: ffff888014c7d948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #1: ffffc900146f7d00 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #1: ffffc900146f7d00 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #2: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: crda_timeout_work+0x15/0x50 net/wireless/reg.c:538 3 locks held by kworker/1:8/16233: #0: ffff888014c7c948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #0: ffff888014c7c948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #1: ffffc90014607d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #1: ffffc90014607d00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #2: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:75 3 locks held by kworker/0:13/21284: #0: ffff888014c7c948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #0: ffff888014c7c948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #1: ffffc9001487fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3121 [inline] #1: ffffc9001487fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x8e1/0x1730 kernel/workqueue.c:3226 #2: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281 1 lock held by syz-executor.4/30589: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.4/30592: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.4/30594: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.1/30591: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.1/30593: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.1/30595: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.3/30606: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.0/30613: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 3 locks held by syz-executor.2/30640: #0: ffffffff8f3eb3f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216 #1: ffffffff8f3eb2a8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8f3eb2a8 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8f3eb2a8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 #2: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: nl802154_pre_doit+0xb5/0xac0 net/ieee802154/nl802154.c:2705 1 lock held by syz-executor.4/30642: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.1/30646: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.2/30649: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.3/30654: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.0/30658: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.4/30662: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.1/30666: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.2/30670: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.3/30677: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 1 lock held by syz-executor.0/30682: #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f387548 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6606 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc4-next-20240214-syzkaller #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+0x241/0x360 lib/dump_stack.c:114 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xfb0/0xff0 kernel/hung_task.c:380 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1087 Comm: kworker/u8:6 Not tainted 6.8.0-rc4-next-20240214-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:check_preemption_disabled+0x60/0x120 lib/smp_processor_id.c:19 Code: 00 48 3b 44 24 08 0f 85 ce 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f c3 cc cc cc cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 74 c5 49 89 f6 49 89 ff 65 4c 8b 24 25 00 bf RSP: 0018:ffffc90004aa7908 EFLAGS: 00000046 RAX: 0000000080000000 RBX: 0000000000000000 RCX: ffffffff8171ec0a RDX: dffffc0000000000 RSI: ffffffff8baaca60 RDI: ffffffff8bfea5c0 RBP: ffffc90004aa79e8 R08: ffffffff92cc357f R09: 1ffffffff25986af R10: dffffc0000000000 R11: fffffbfff25986b0 R12: ffff888021c36548 R13: 0000000000000002 R14: ffff888021c364d0 R15: 1ffff11004386c9a FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00e408888 CR3: 000000000df32000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline] lockdep_hardirqs_on_prepare+0x43d/0x780 kernel/locking/lockdep.c:4360 trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61 __local_bh_enable_ip+0x168/0x200 kernel/softirq.c:387 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_nc_purge_paths+0x30f/0x3b0 net/batman-adv/network-coding.c:471 batadv_nc_worker+0x365/0x610 net/batman-adv/network-coding.c:722 process_one_work kernel/workqueue.c:3146 [inline] process_scheduled_works+0x9d7/0x1730 kernel/workqueue.c:3226 worker_thread+0x86d/0xd70 kernel/workqueue.c:3307 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242