INFO: task kworker/u8:10:2877 blocked for more than 143 seconds. Not tainted 6.9.0-syzkaller-10312-g1b0361620970 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u8:10 state:D stack:24672 pid:2877 tgid:2877 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 register_nexthop_notifier+0x1b/0x70 net/ipv4/nexthop.c:3871 nsim_fib_create+0x8df/0xc90 drivers/net/netdevsim/fib.c:1587 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1480 [inline] nsim_dev_reload_up+0x3f6/0x860 drivers/net/netdevsim/dev.c:985 devlink_reload+0x31a/0x7c0 net/devlink/dev.c:474 devlink_pernet_pre_exit+0x1a1/0x2b0 net/devlink/core.c:509 ops_pre_exit_list net/core/net_namespace.c:163 [inline] cleanup_net+0x488/0xbf0 net/core/net_namespace.c:620 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task dhcpcd:4749 blocked for more than 143 seconds. Not tainted 6.9.0-syzkaller-10312-g1b0361620970 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:23104 pid:4749 tgid:4749 ppid:4748 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 devinet_ioctl+0x26e/0x1f10 net/ipv4/devinet.c:1101 inet_ioctl+0x3aa/0x3f0 net/ipv4/af_inet.c:1001 sock_do_ioctl+0x116/0x280 net/socket.c:1222 sock_ioctl+0x22e/0x6c0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe44aa83d49 RSP: 002b:00007ffee0b33108 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe44a9b56c0 RCX: 00007fe44aa83d49 RDX: 00007ffee0b432f8 RSI: 0000000000008914 RDI: 0000000000000008 RBP: 00007ffee0b534b8 R08: 00007ffee0b432b8 R09: 00007ffee0b43268 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffee0b432f8 R14: 0000000000000028 R15: 0000000000008914 INFO: task kworker/0:4:5158 blocked for more than 144 seconds. Not tainted 6.9.0-syzkaller-10312-g1b0361620970 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:24848 pid:5158 tgid:5158 ppid:2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 linkwatch_event+0x51/0xc0 net/core/link_watch.c:276 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task syz-executor.3:6743 blocked for more than 144 seconds. Not tainted 6.9.0-syzkaller-10312-g1b0361620970 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:23696 pid:6743 tgid:6743 ppid:1 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2564 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7feab587ebdc RSP: 002b:00007ffcb26f27d0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007feab64d4620 RCX: 00007feab587ebdc RDX: 0000000000000044 RSI: 00007feab64d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffcb26f2824 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007feab64d4670 R15: 0000000000000000 INFO: task syz-executor.0:6828 blocked for more than 144 seconds. Not tainted 6.9.0-syzkaller-10312-g1b0361620970 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24000 pid:6828 tgid:6828 ppid:1 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2564 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2f6827ebdc RSP: 002b:00007ffe942e6fc0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f2f68ed4620 RCX: 00007f2f6827ebdc RDX: 0000000000000054 RSI: 00007f2f68ed4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffe942e7014 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f2f68ed4670 R15: 0000000000000000 INFO: task syz-executor.1:6893 blocked for more than 145 seconds. Not tainted 6.9.0-syzkaller-10312-g1b0361620970 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:24832 pid:6893 tgid:6893 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5408 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 rtnl_lock net/core/rtnetlink.c:79 [inline] __rtnl_newlink+0x65a/0x1960 net/core/rtnetlink.c:3720 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x3c7/0xe60 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2564 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f706927ebdc RSP: 002b:00007fff1f4abd80 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f7069ed4620 RCX: 00007f706927ebdc RDX: 000000000000003c RSI: 00007f7069ed4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff1f4abdd4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f7069ed4670 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 3 locks held by kworker/u8:5/139: #0: ffff88802a77f948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc90002dc7d80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4733 3 locks held by kworker/0:3/931: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc900045bfd80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104 6 locks held by kworker/u8:10/2877: #0: ffff8880162d3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc9000acb7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f7347d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:594 #3: ffff8880611450e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:994 [inline] #3: ffff8880611450e8 (&dev->mutex){....}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline] #3: ffff8880611450e8 (&dev->mutex){....}-{3:3}, at: devlink_pernet_pre_exit+0x12d/0x2b0 net/devlink/core.c:506 #4: ffff888061146250 (&devlink->lock_key#3){+.+.}-{3:3}, at: devl_lock net/devlink/core.c:276 [inline] #4: ffff888061146250 (&devlink->lock_key#3){+.+.}-{3:3}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline] #4: ffff888061146250 (&devlink->lock_key#3){+.+.}-{3:3}, at: devlink_pernet_pre_exit+0x137/0x2b0 net/devlink/core.c:506 #5: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x1b/0x70 net/ipv4/nexthop.c:3871 1 lock held by dhcpcd/4749: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x26e/0x1f10 net/ipv4/devinet.c:1101 2 locks held by getty/4848: #0: ffff88802f8210a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 3 locks held by kworker/0:4/5158: #0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc90004407d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276 3 locks held by kworker/0:5/5162: #0: ffff888015481948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206 #1: ffffc90004427d80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207 #2: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7d/0x10e0 net/wireless/reg.c:2478 1 lock held by syz-executor.3/6743: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.0/6828: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.1/6893: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: __rtnl_newlink+0x65a/0x1960 net/core/rtnetlink.c:3720 2 locks held by syz-executor.4/6976: 1 lock held by syz-executor.2/7020: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: dev_ethtool+0x244/0x56c0 net/ethtool/ioctl.c:3176 1 lock held by syz-executor.4/7023: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.2/7028: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.3/7033: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.0/7037: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.1/7042: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.4/7048: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.2/7053: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.3/7059: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.0/7063: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 1 lock held by syz-executor.1/7067: #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f749a68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.9.0-syzkaller-10312-g1b0361620970 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 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:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf86/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.9.0-syzkaller-10312-g1b0361620970 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_release kernel/locking/lockdep.c:5438 [inline] RIP: 0010:lock_release+0x209/0x6c0 kernel/locking/lockdep.c:5774 Code: 00 00 45 85 ed 0f 84 c8 02 00 00 48 8d 4c 24 50 44 89 ea 4c 89 e6 4c 89 ff e8 23 09 ff ff 48 85 c0 48 89 c3 0f 84 a9 02 00 00 <48> 8d 78 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f RSP: 0018:ffffc90000117ac8 EFLAGS: 00000086 RAX: ffff8880176b6530 RBX: ffff8880176b6530 RCX: ffffc90000117b18 RDX: 0000000000000004 RSI: ffffffff8dbb1760 RDI: ffff8880176b6530 RBP: 1ffff92000022f5b R08: 0000000000000000 R09: fffffbfff1fc88ba R10: ffffffff8fe445d7 R11: 0000000000000002 R12: ffffffff8dbb1760 R13: 0000000000000003 R14: ffff8880176b64d8 R15: ffff8880176b5a00 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff5042d9a39 CR3: 000000000d97a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:339 [inline] rcu_read_unlock include/linux/rcupdate.h:812 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x8ee/0x10f0 net/batman-adv/network-coding.c:719 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244