INFO: task dhcpcd:4736 blocked for more than 143 seconds. Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:22688 pid:4736 tgid:4736 ppid:4735 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 netlink_dump+0xc1/0xcc0 net/netlink/af_netlink.c:2211 __netlink_dump_start+0x6d9/0x9d0 net/netlink/af_netlink.c:2370 netlink_dump_start include/linux/netlink.h:338 [inline] rtnetlink_rcv_msg+0xaba/0xe10 net/core/rtnetlink.c:6571 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8bb/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2199 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: 0033:0x7fd6eab41ad7 RSP: 002b:00007ffe695982a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ffe695993d0 RCX: 00007fd6eab41ad7 RDX: 0000000000000014 RSI: 00007ffe695992f0 RDI: 000000000000000e RBP: 00007ffe69599360 R08: 00007ffe695992d4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000012 R13: 00007ffe695992d4 R14: 00007ffe695992f0 R15: 0000000000000105 INFO: task kworker/0:2:2962 blocked for more than 143 seconds. Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:25776 pid:2962 tgid:2962 ppid:2 flags:0x00004000 Workqueue: events linkwatch_event 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 linkwatch_event+0x51/0xc0 net/core/link_watch.c:281 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:242 INFO: task syz-executor.1:9713 blocked for more than 143 seconds. Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:23408 pid:9713 tgid:9710 ppid:5099 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 netdev_wait_allrefs_any net/core/dev.c:10451 [inline] netdev_run_todo+0xe10/0x12f0 net/core/dev.c:10569 tun_detach drivers/net/tun.c:702 [inline] tun_chr_close+0xf0/0x250 drivers/net/tun.c:3504 __fput+0x270/0xb80 fs/file_table.c:376 task_work_run+0x14f/0x250 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa8a/0x2ad0 kernel/exit.c:871 do_group_exit+0xd4/0x2a0 kernel/exit.c:1020 get_signal+0x23b9/0x2790 kernel/signal.c:2893 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline] syscall_exit_to_user_mode+0x156/0x2b0 kernel/entry/common.c:212 do_syscall_64+0xe5/0x270 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fd92b67dda9 RSP: 002b:00007fd92c4ab0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 0000000000000054 RBX: 00007fd92b7ac050 RCX: 00007fd92b67dda9 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000007 RBP: 00007fd92b6ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fd92b7ac050 R15: 00007ffc15306468 INFO: task syz-executor.1:9753 blocked for more than 144 seconds. Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:22912 pid:9753 tgid:9753 ppid:1 flags:0x00000006 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 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8bb/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2199 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: 0033:0x7ff13267fa9c RSP: 002b:00007ffca0ba1970 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ff1332d4620 RCX: 00007ff13267fa9c RDX: 0000000000000028 RSI: 00007ff1332d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffca0ba19c4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007ff1332d4670 R15: 0000000000000000 INFO: task syz-executor.2:9758 blocked for more than 144 seconds. Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26384 pid:9758 tgid:9758 ppid:1 flags:0x00000006 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 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8bb/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2199 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: 0033:0x7f503d87fa9c RSP: 002b:00007ffe5b1119f0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f503e4d4620 RCX: 00007f503d87fa9c RDX: 0000000000000040 RSI: 00007f503e4d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffe5b111a44 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f503e4d4670 R15: 0000000000000000 INFO: task syz-executor.4:9760 blocked for more than 144 seconds. Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:24848 pid:9760 tgid:9760 ppid:1 flags:0x00000006 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 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8bb/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2199 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: 0033:0x7fb4a0e7fa9c RSP: 002b:00007ffd7ade89b0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fb4a1ad4620 RCX: 00007fb4a0e7fa9c RDX: 000000000000003c RSI: 00007fb4a1ad4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd7ade8a04 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fb4a1ad4670 R15: 0000000000000000 INFO: task syz-executor.0:9764 blocked for more than 145 seconds. Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24704 pid:9764 tgid:9764 ppid:1 flags:0x00004006 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 rtnl_lock net/core/rtnetlink.c:79 [inline] rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8bb/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] __sys_sendto+0x47f/0x4e0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2199 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: 0033:0x7f7f6b67fa9c RSP: 002b:00007ffeed9ac230 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f7f6c2d4620 RCX: 00007f7f6b67fa9c RDX: 0000000000000038 RSI: 00007f7f6c2d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffeed9ac284 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007f7f6c2d4670 R15: 0000000000000000 INFO: task syz-executor.3:9767 blocked for more than 145 seconds. Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:25456 pid:9767 tgid:9767 ppid:1 flags:0x00000006 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 __tun_chr_ioctl+0x4fc/0x4790 drivers/net/tun.c:3114 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: 0033:0x7fb0e8e7db0b RSP: 002b:00007ffe53b37dd0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fb0e8e7db0b RDX: 00007ffe53b37e50 RSI: 00000000400454ca RDI: 00000000000000c8 RBP: 00007ffe53b37fc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe53b385a8 R13: 0000000000000003 R14: 00007fb0e8fac9d8 R15: 000000000000000c Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8d7b0b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d7b0b60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d7b0b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 1 lock held by syslogd/4504: #0: ffff8880b943ccd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559 1 lock held by dhcpcd/4736: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0xc1/0xcc0 net/netlink/af_netlink.c:2211 2 locks held by getty/4823: #0: ffff88802f2790a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfca/0x1490 drivers/tty/n_tty.c:2201 5 locks held by kworker/u4:14/8146: #0: ffff8880162ecd38 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608 #1: ffffc90013747d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609 #2: ffffffff8f2d89d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9f/0xb20 net/core/net_namespace.c:580 #3: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x8c/0xad0 net/core/dev.c:11610 #4: ffffffff8d7bc3b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline] #4: ffffffff8d7bc3b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x6b5/0x800 kernel/rcu/tree_exp.h:995 3 locks held by kworker/0:8/23115: #0: ffff88802a48e538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608 #1: ffffc90009727d80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609 #2: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4671 2 locks held by kworker/u4:4/12976: 3 locks held by kworker/1:15/15925: #0: ffff88802a48e538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608 #1: ffffc9000ce5fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609 #2: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4671 3 locks held by kworker/0:2/2962: #0: ffff888014c8cd38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608 #1: ffffc90013b5fd80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609 #2: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:281 1 lock held by syz-executor.1/9713: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: netdev_wait_allrefs_any net/core/dev.c:10451 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: netdev_run_todo+0xe10/0x12f0 net/core/dev.c:10569 1 lock held by syz-executor.1/9753: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.2/9758: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.4/9760: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.0/9764: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.3/9767: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x4fc/0x4790 drivers/net/tun.c:3114 3 locks held by kworker/0:1/9769: #0: ffff888014c8cd38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608 #1: ffffc900031cfd80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609 #2: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:75 2 locks held by kworker/0:6/9775: #0: ffff888014c8e938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x789/0x15e0 kernel/workqueue.c:2608 #1: ffffc9000320fd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15e0 kernel/workqueue.c:2609 1 lock held by syz-executor.1/9836: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.2/9840: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.3/9841: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.4/9844: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.0/9846: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.1/9856: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.2/9862: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.3/9865: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.4/9867: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.0/9869: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.1/9876: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.2/9881: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.3/9884: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.4/9886: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 1 lock held by syz-executor.0/9888: #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8f2ee028 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe10 net/core/rtnetlink.c:6612 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #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:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8149 Comm: kworker/u4:16 Not tainted 6.8.0-rc1-syzkaller-00583-g1701940b1a02 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:hlock_class+0x58/0x130 kernel/locking/lockdep.c:240 Code: 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 cf d5 93 e8 72 85 7b 00 48 0f a3 1d 4a e3 6a 12 73 13 <48> 69 c3 c8 00 00 00 5b 48 05 e0 d3 d5 93 c3 cc cc cc cc 48 c7 c0 RSP: 0018:ffffc900139e7968 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 0000000000000018 RCX: ffffffff816aec6e RDX: fffffbfff27ab9f9 RSI: 0000000000000008 RDI: ffffffff93d5cfc0 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff27ab9f8 R10: ffffffff93d5cfc7 R11: 0000000000000002 R12: ffff8880233c8b10 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000018 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f869d517866 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:4773 [inline] __lock_acquire+0x402/0x3b40 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] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x16e/0x10f0 net/batman-adv/network-coding.c:719 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:242