INFO: task dhcpcd:4721 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:22264 pid:4721 tgid:4721 ppid:1 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 __netlink_dump_start+0x13e/0x790 net/netlink/af_netlink.c:2333 netlink_dump_start include/linux/netlink.h:338 [inline] rtnetlink_rcv_msg+0xc96/0x1040 net/core/rtnetlink.c:6573 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f9dd4da1a4b RSP: 002b:00007ffd167bc9e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000055558636a81d RCX: 00007f9dd4da1a4b RDX: 0000000000000000 RSI: 00007ffd167bca30 RDI: 000000000000000f RBP: 00007ffd167c4da8 R08: 00007ffd167c0ad4 R09: 00007ffd167c0ad4 R10: 00007ffd167c4ff0 R11: 0000000000000246 R12: 000000000000000f R13: 0000555587e8d0b0 R14: 00007ffd167c4da8 R15: 0000000003011eac INFO: task kworker/1:3:5132 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:3 state:D stack:20816 pid:5132 tgid:5132 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4144 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x9ff/0x1770 kernel/workqueue.c:3335 worker_thread+0x86c/0xd70 kernel/workqueue.c:3416 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 INFO: task kworker/0:4:27837 blocked for more than 144 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:21688 pid:27837 tgid:27837 ppid:2 flags:0x00004000 Workqueue: events smc_ib_port_event_work Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 ib_get_eth_speed+0x153/0x800 drivers/infiniband/core/verbs.c:1983 rxe_query_port+0x76/0x260 drivers/infiniband/sw/rxe/rxe_verbs.c:55 __ib_query_port drivers/infiniband/core/device.c:2060 [inline] ib_query_port+0x166/0x7d0 drivers/infiniband/core/device.c:2092 smc_ib_remember_port_attr net/smc/smc_ib.c:359 [inline] smc_ib_port_event_work+0x161/0xa70 net/smc/smc_ib.c:383 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x9ff/0x1770 kernel/workqueue.c:3335 worker_thread+0x86c/0xd70 kernel/workqueue.c:3416 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 INFO: task kworker/1:1:31662 blocked for more than 144 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:22488 pid:31662 tgid:31662 ppid:2 flags:0x00004000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x9ff/0x1770 kernel/workqueue.c:3335 worker_thread+0x86c/0xd70 kernel/workqueue.c:3416 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 INFO: task kworker/1:2:25650 blocked for more than 144 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:22800 pid:25650 tgid:25650 ppid:2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 linkwatch_event+0xe/0x60 net/core/link_watch.c:281 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x9ff/0x1770 kernel/workqueue.c:3335 worker_thread+0x86c/0xd70 kernel/workqueue.c:3416 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 INFO: task syz-executor.3:14988 blocked for more than 145 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:20408 pid:14988 tgid:14988 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f4b8d27fa9c RSP: 002b:00007ffce53d3590 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f4b8ded4620 RCX: 00007f4b8d27fa9c RDX: 0000000000000028 RSI: 00007f4b8ded4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffce53d35e4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f4b8ded4670 R15: 0000000000000000 INFO: task syz-executor.1:14992 blocked for more than 145 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:20408 pid:14992 tgid:14992 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f6318a7fa9c RSP: 002b:00007ffebdfa4460 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f63196d4620 RCX: 00007f6318a7fa9c RDX: 0000000000000028 RSI: 00007f63196d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffebdfa44b4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f63196d4670 R15: 0000000000000000 INFO: task syz-executor.2:14998 blocked for more than 145 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:20408 pid:14998 tgid:14998 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f11f447fa9c RSP: 002b:00007ffc501d9630 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f11f50d4620 RCX: 00007f11f447fa9c RDX: 0000000000000020 RSI: 00007f11f50d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc501d9684 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f11f50d4670 R15: 0000000000000000 INFO: task syz-executor.4:15094 blocked for more than 146 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:20984 pid:15094 tgid:15094 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f21bb27fa9c RSP: 002b:00007ffd80243b00 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f21bbed4620 RCX: 00007f21bb27fa9c RDX: 0000000000000028 RSI: 00007f21bbed4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd80243b54 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f21bbed4670 R15: 0000000000000000 INFO: task kworker/0:7:15218 blocked for more than 146 seconds. Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:7 state:D stack:24784 pid:15218 tgid:15218 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5411 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6738 __schedule_loop kernel/sched/core.c:6815 [inline] schedule+0x14a/0x320 kernel/sched/core.c:6830 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6887 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4144 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x9ff/0x1770 kernel/workqueue.c:3335 worker_thread+0x86c/0xd70 kernel/workqueue.c:3416 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e131020 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e131020 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e131020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 5 locks held by kworker/u8:4/60: #0: ffff888015acb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888015acb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x8df/0x1770 kernel/workqueue.c:3335 #1: ffffc900015b7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc900015b7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x91a/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f358c50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf5/0xb90 net/core/net_namespace.c:580 #3: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe8/0x9d0 net/core/dev.c:11612 #4: ffffffff8e1363b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #4: ffffffff8e1363b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939 1 lock held by dhcpcd/4721: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: __netlink_dump_start+0x13e/0x790 net/netlink/af_netlink.c:2333 2 locks held by getty/4809: #0: ffff88802ac830a0 (&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+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 3 locks held by kworker/1:3/5132: #0: ffff888029aaa548 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888029aaa548 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x8df/0x1770 kernel/workqueue.c:3335 #1: ffffc90004897d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc90004897d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x91a/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4144 4 locks held by kworker/0:4/27837: #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8df/0x1770 kernel/workqueue.c:3335 #1: ffffc90013c9fd00 ((work_completion)(&smcibdev->port_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc90013c9fd00 ((work_completion)(&smcibdev->port_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91a/0x1770 kernel/workqueue.c:3335 #2: ffff8880a7d41158 (&rxe->usdev_lock){+.+.}-{3:3}, at: rxe_query_port+0x61/0x260 drivers/infiniband/sw/rxe/rxe_verbs.c:54 #3: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: ib_get_eth_speed+0x153/0x800 drivers/infiniband/core/verbs.c:1983 3 locks held by kworker/0:9/27840: #0: ffff888014c79948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888014c79948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x8df/0x1770 kernel/workqueue.c:3335 #1: ffffc90013cafd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc90013cafd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x91a/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x91/0xe50 net/wireless/reg.c:2479 3 locks held by kworker/1:1/31662: #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8df/0x1770 kernel/workqueue.c:3335 #1: ffffc900139e7d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc900139e7d00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x91a/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 3 locks held by kworker/1:2/25650: #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888014c78948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8df/0x1770 kernel/workqueue.c:3335 #1: ffffc9001370fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc9001370fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x91a/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281 3 locks held by kworker/u8:3/14756: #0: ffff888015b1c948 ((wq_completion)ib-unreg-wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888015b1c948 ((wq_completion)ib-unreg-wq){+.+.}-{0:0}, at: process_scheduled_works+0x8df/0x1770 kernel/workqueue.c:3335 #1: ffffc9000a577d00 ((work_completion)(&device->unregistration_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc9000a577d00 ((work_completion)(&device->unregistration_work)){+.+.}-{0:0}, at: process_scheduled_works+0x91a/0x1770 kernel/workqueue.c:3335 #2: ffff8880a7d406a0 (&device->unregistration_lock){+.+.}-{3:3}, at: __ib_unregister_device+0x2a/0x170 drivers/infiniband/core/device.c:1471 1 lock held by syz-executor.3/14988: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.1/14992: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.2/14998: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.4/15094: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 3 locks held by kworker/0:7/15218: #0: ffff888029aaa548 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3229 [inline] #0: ffff888029aaa548 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x8df/0x1770 kernel/workqueue.c:3335 #1: ffffc900034efd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3230 [inline] #1: ffffc900034efd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x91a/0x1770 kernel/workqueue.c:3335 #2: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4144 1 lock held by syz-executor.0/15246: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.0/15247: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.0/15248: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x86e/0x1340 net/core/dev_ioctl.c:811 1 lock held by syz-executor.3/15251: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.1/15255: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.2/15258: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.0/15262: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.4/15267: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.3/15274: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.1/15277: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.2/15281: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.0/15284: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.4/15289: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.3/15297: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.1/15300: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.2/15303: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 1 lock held by syz-executor.0/15307: #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f3651c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6614 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 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:222 [inline] watchdog+0xfaf/0xff0 kernel/hung_task.c:379 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13107 Comm: kworker/u8:1 Not tainted 6.8.0-syzkaller-00711-g045395d86acd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4774 [inline] RIP: 0010:__lock_acquire+0x5a7/0x1fd0 kernel/locking/lockdep.c:5087 Code: 00 00 00 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 39 12 00 00 0f b6 2b 48 8b 44 24 20 0f b6 04 10 84 c0 0f 85 49 12 00 00 <41> 8b 1f 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 e0 e4 RSP: 0018:ffffc900139bf8f0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffffff92945e6c RCX: ffffffff817167fa RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff92c5e4e0 RBP: 0000000000000002 R08: ffffffff92c5e4e7 R09: 1ffffffff258bc9c R10: dffffc0000000000 R11: fffffbfff258bc9d R12: 0000000000000000 R13: ffff888081fe9e00 R14: 000000000000000a R15: ffff888081fea948 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a43dbbb00 CR3: 000000000df32000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754 rcu_lock_acquire include/linux/rcupdate.h:298 [inline] rcu_read_lock include/linux/rcupdate.h:750 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3254 [inline] process_scheduled_works+0x9ff/0x1770 kernel/workqueue.c:3335 worker_thread+0x86c/0xd70 kernel/workqueue.c:3416 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243