INFO: task kworker/1:15:21752 blocked for more than 143 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:15 state:D stack:24472 pid:21752 ppid: 2 flags:0x00004000 Workqueue: events nsim_dev_trap_report_work Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 nsim_dev_trap_report_work+0x56/0xb20 drivers/net/netdevsim/dev.c:757 process_one_work+0x853/0x1140 kernel/workqueue.c:2297 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 INFO: task kworker/u4:7:27780 blocked for more than 143 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:7 state:D stack:23352 pid:27780 ppid: 2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 netdev_run_todo+0xafa/0xcf0 net/core/dev.c:10594 nsim_destroy+0xab/0x140 drivers/net/netdevsim/netdev.c:387 __nsim_dev_port_del+0x152/0x1b0 drivers/net/netdevsim/dev.c:1349 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1362 [inline] nsim_dev_reload_destroy+0x160/0x240 drivers/net/netdevsim/dev.c:1561 nsim_dev_reload_down+0x101/0x160 drivers/net/netdevsim/dev.c:883 devlink_reload+0x4d2/0xed0 net/core/devlink.c:3963 devlink_pernet_pre_exit+0x1d6/0x360 net/core/devlink.c:11542 ops_pre_exit_list net/core/net_namespace.c:158 [inline] cleanup_net+0x608/0xc50 net/core/net_namespace.c:579 process_one_work+0x853/0x1140 kernel/workqueue.c:2297 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 INFO: task systemd-udevd:643 blocked for more than 144 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:24592 pid: 643 ppid: 2967 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 dev_ioctl+0x277/0xf30 net/core/dev_ioctl.c:521 sock_do_ioctl+0x34d/0x5b0 net/socket.c:1132 sock_ioctl+0x4f7/0x990 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f67291c0017 RSP: 002b:00007fffa32405c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fffa3240620 RCX: 00007f67291c0017 RDX: 00007fffa3240620 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007fffa3240680 R08: 0000000000000007 R09: 0000557c7eb18e71 R10: 00007f672922aa40 R11: 0000000000000246 R12: 0000557c7eb152b0 R13: 0000557c7eafaff0 R14: 00000000ffffffff R15: 0000000000000000 INFO: task syz-executor.3:684 blocked for more than 144 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26704 pid: 684 ppid: 7023 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x814/0x9f0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0xa29/0xe50 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x5b9/0x910 net/socket.c:2409 ___sys_sendmsg net/socket.c:2463 [inline] __sys_sendmsg+0x37d/0x470 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe2fae99739 RSP: 002b:00007fe2f83ef188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fe2faf9e038 RCX: 00007fe2fae99739 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007fe2faef3cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2faf9e038 R13: 00007ffff5c80b6f R14: 00007fe2f83ef300 R15: 0000000000022000 INFO: task syz-executor.5:686 blocked for more than 144 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:26616 pid: 686 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x814/0x9f0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0xa29/0xe50 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] __sys_sendto+0x56c/0x730 net/socket.c:2036 __do_sys_sendto net/socket.c:2048 [inline] __se_sys_sendto net/socket.c:2044 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2044 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff8fa2f36cc RSP: 002b:00007fff6c35ca30 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ff8fb37d320 RCX: 00007ff8fa2f36cc RDX: 0000000000000028 RSI: 00007ff8fb37d370 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff6c35ca84 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007ff8fb37d370 R14: 0000000000000003 R15: 0000000000000000 INFO: task syz-executor.2:687 blocked for more than 145 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26608 pid: 687 ppid: 1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xc8d/0x1270 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common+0xdff/0x2550 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:743 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x814/0x9f0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0xa29/0xe50 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] __sys_sendto+0x56c/0x730 net/socket.c:2036 __do_sys_sendto net/socket.c:2048 [inline] __se_sys_sendto net/socket.c:2044 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2044 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f0d9bf186cc RSP: 002b:00007ffcd00f4a40 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f0d9cfa2320 RCX: 00007f0d9bf186cc RDX: 0000000000000028 RSI: 00007f0d9cfa2370 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffcd00f4a94 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f0d9cfa2370 R14: 0000000000000003 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c91c180 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 3 locks held by kworker/u4:2/148: #0: ffff8880b9d31558 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:474 [inline] #0: ffff8880b9d31558 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1317 [inline] #0: ffff8880b9d31558 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1620 [inline] #0: ffff8880b9d31558 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x188/0x1270 kernel/sched/core.c:6201 #1: ffff8880b9d1f888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4c1/0x780 kernel/sched/psi.c:880 #2: ffff88804ad9cd80 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1014 [inline] #2: ffff88804ad9cd80 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0xa3/0x14f0 net/mac80211/ibss.c:1676 1 lock held by in:imklog/6211: #0: ffff88801b3feaf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990 2 locks held by agetty/6240: #0: ffff88801dbe4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900011ec2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113 3 locks held by kworker/u4:13/10499: #0: ffff8881411a2938 ((wq_completion)cfg80211){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc90017147d20 ((work_completion)(&(&rdev->dfs_update_channels_wk)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: cfg80211_dfs_channels_update_work+0xbc/0x660 net/wireless/mlme.c:842 3 locks held by kworker/1:15/21752: #0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc9000441fd20 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffff888073545400 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_trap_report_work+0x56/0xb20 drivers/net/netdevsim/dev.c:757 3 locks held by kworker/1:17/21754: 3 locks held by kworker/1:19/21756: #0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc9000445fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251 3 locks held by kworker/1:22/21759: #0: ffff888011064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc9000448fd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74 2 locks held by kworker/1:24/25881: #0: ffff8880b9d31558 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1b/0x30 kernel/sched/core.c:474 #1: ffff8880b9d1f888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x46c/0x780 kernel/sched/psi.c:871 7 locks held by kworker/u4:7/27780: #0: ffff8880163a3138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc9000b95fd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d94f770 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc50 net/core/net_namespace.c:553 #3: ffffffff8d97ff88 (devlink_mutex){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0xb0/0x360 net/core/devlink.c:11533 #4: ffff888073544658 (&nsim_bus_dev->nsim_bus_reload_lock){+.+.}-{3:3}, at: nsim_dev_reload_down+0x58/0x160 drivers/net/netdevsim/dev.c:870 #5: ffff888073545400 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1359 [inline] #5: ffff888073545400 (&nsim_dev->port_list_lock){+.+.}-{3:3}, at: nsim_dev_reload_destroy+0x117/0x240 drivers/net/netdevsim/dev.c:1561 #6: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0xafa/0xcf0 net/core/dev.c:10594 3 locks held by kworker/0:32/31888: #0: ffff888147efe938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7ca/0x1140 #1: ffffc9001702fd20 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x808/0x1140 kernel/workqueue.c:2272 #2: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4590 1 lock held by systemd-udevd/643: #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x277/0xf30 net/core/dev_ioctl.c:521 1 lock held by syz-executor.0/659: #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:684 [inline] #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3c/0x130 drivers/net/tun.c:3397 1 lock held by syz-executor.1/664: #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:684 [inline] #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3c/0x130 drivers/net/tun.c:3397 2 locks held by syz-executor.4/669: #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 #1: ffffffff8c920968 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8c920968 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x277/0x750 kernel/rcu/tree_exp.h:837 1 lock held by syz-executor.3/684: #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 1 lock held by syz-executor.5/686: #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 1 lock held by syz-executor.2/687: #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d95b3c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x8ed/0xe60 net/core/rtnetlink.c:5569 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc54/0xca0 kernel/hung_task.c:295 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:check_preemption_disabled+0x82/0x190 lib/smp_processor_id.c:19 Code: 00 00 48 3b 44 24 08 0f 85 17 01 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 <4c> 8b 24 24 bd 00 02 00 00 be 00 02 00 00 4c 21 e6 31 ff 0f 1f 44 RSP: 0018:ffffc90000cd7a38 EFLAGS: 00000046 RAX: db0e8b3cb92fab00 RBX: 0000000000000000 RCX: ffff888011245f70 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1fa2fc1 R10: fffffbfff1fa2fc1 R11: 0000000000000000 R12: 0000000000000246 R13: 1ffff9200019af58 R14: ffffffff8a4f00e0 R15: ffffffff8ab41ac0 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fccab5da008 CR3: 000000000c68e000 CR4: 00000000001506f0 Call Trace: lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline] lock_acquire+0x1af/0x4d0 kernel/locking/lockdep.c:5627 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267 rcu_read_lock include/linux/rcupdate.h:687 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:410 [inline] batadv_nc_worker+0xc8/0x5b0 net/batman-adv/network-coding.c:721 process_one_work+0x853/0x1140 kernel/workqueue.c:2297 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 3b 44 24 08 cmp 0x8(%rsp),%rax 7: 0f 85 17 01 00 00 jne 0x124 d: 89 d8 mov %ebx,%eax f: 48 83 c4 10 add $0x10,%rsp 13: 5b pop %rbx 14: 41 5c pop %r12 16: 41 5d pop %r13 18: 41 5e pop %r14 1a: 41 5f pop %r15 1c: 5d pop %rbp 1d: c3 retq 1e: 48 c7 04 24 00 00 00 movq $0x0,(%rsp) 25: 00 26: 9c pushfq 27: 8f 04 24 popq (%rsp) * 2a: 4c 8b 24 24 mov (%rsp),%r12 <-- trapping instruction 2e: bd 00 02 00 00 mov $0x200,%ebp 33: be 00 02 00 00 mov $0x200,%esi 38: 4c 21 e6 and %r12,%rsi 3b: 31 ff xor %edi,%edi 3d: 0f .byte 0xf 3e: 1f (bad) 3f: 44 rex.R