INFO: task syz-executor:27615 blocked for more than 143 seconds. Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20992 pid:27615 tgid:27615 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5264 [inline] __schedule+0x1893/0x4b50 kernel/sched/core.c:6607 __schedule_loop kernel/sched/core.c:6684 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6699 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 tun_detach drivers/net/tun.c:698 [inline] tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3517 __fput+0x23f/0x880 fs/file_table.c:431 task_work_run+0x24f/0x310 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa2f/0x27f0 kernel/exit.c:882 do_group_exit+0x207/0x2c0 kernel/exit.c:1031 get_signal+0x176f/0x1810 kernel/signal.c:2936 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff3a817c93c RSP: 002b:00007ff3a845fd90 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007ff3a817c93c RDX: 0000000000000028 RSI: 00007ff3a845fe40 RDI: 00000000000000f9 RBP: 00007ff3a845fdec R08: 0000000000000000 R09: 0079746972756365 R10: 00007ff3a83087e0 R11: 0000000000000246 R12: 0000555559e455eb R13: 0000555559e45590 R14: 0000000000171553 R15: 00007ff3a845fe40 INFO: task syz-executor:28293 blocked for more than 144 seconds. Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:20992 pid:28293 tgid:28293 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5264 [inline] __schedule+0x1893/0x4b50 kernel/sched/core.c:6607 __schedule_loop kernel/sched/core.c:6684 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6699 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 tun_detach drivers/net/tun.c:698 [inline] tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3517 __fput+0x23f/0x880 fs/file_table.c:431 task_work_run+0x24f/0x310 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa2f/0x27f0 kernel/exit.c:882 do_group_exit+0x207/0x2c0 kernel/exit.c:1031 get_signal+0x176f/0x1810 kernel/signal.c:2936 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f91d6b7c93c RSP: 002b:00007f91d6e5fd90 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f91d6b7c93c RDX: 0000000000000028 RSI: 00007f91d6e5fe40 RDI: 00000000000000f9 RBP: 00007f91d6e5fdec R08: 0000000000000000 R09: 0079746972756365 R10: 00007f91d6d087e0 R11: 0000000000000246 R12: 0000555569e4d5eb R13: 0000555569e4d590 R14: 00000000001715fd R15: 00007f91d6e5fe40 INFO: task syz-executor:28691 blocked for more than 145 seconds. Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:26512 pid:28691 tgid:28691 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5264 [inline] __schedule+0x1893/0x4b50 kernel/sched/core.c:6607 __schedule_loop kernel/sched/core.c:6684 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6699 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 ops_init+0x31e/0x590 net/core/net_namespace.c:139 setup_net+0x287/0x9e0 net/core/net_namespace.c:356 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:494 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x619/0xc10 kernel/fork.c:3308 __do_sys_unshare kernel/fork.c:3379 [inline] __se_sys_unshare kernel/fork.c:3377 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3377 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa83b37f6f7 RSP: 002b:00007fa83b65ffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fa83b3f22ec RCX: 00007fa83b37f6f7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 0000000000000000 R08: 00007fa83c067d60 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000000c R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000 INFO: task syz-executor:28693 blocked for more than 146 seconds. Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:26512 pid:28693 tgid:28693 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5264 [inline] __schedule+0x1893/0x4b50 kernel/sched/core.c:6607 __schedule_loop kernel/sched/core.c:6684 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6699 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 ops_init+0x31e/0x590 net/core/net_namespace.c:139 setup_net+0x287/0x9e0 net/core/net_namespace.c:356 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:494 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x619/0xc10 kernel/fork.c:3308 __do_sys_unshare kernel/fork.c:3379 [inline] __se_sys_unshare kernel/fork.c:3377 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3377 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7e1f57f6f7 RSP: 002b:00007f7e1f85ffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f7e1f5f22ec RCX: 00007f7e1f57f6f7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 0000000000000000 R08: 00007f7e20267d60 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000000c R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000 INFO: task syz-executor:28694 blocked for more than 146 seconds. Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:26512 pid:28694 tgid:28694 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5264 [inline] __schedule+0x1893/0x4b50 kernel/sched/core.c:6607 __schedule_loop kernel/sched/core.c:6684 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6699 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 ops_init+0x31e/0x590 net/core/net_namespace.c:139 setup_net+0x287/0x9e0 net/core/net_namespace.c:356 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:494 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x619/0xc10 kernel/fork.c:3308 __do_sys_unshare kernel/fork.c:3379 [inline] __se_sys_unshare kernel/fork.c:3377 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3377 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7ff6d7f6f7 RSP: 002b:00007f7ff705ffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f7ff6df22ec RCX: 00007f7ff6d7f6f7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 0000000000000000 R08: 00007f7ff7a67d60 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000000c R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000 INFO: task syz-executor:28698 blocked for more than 147 seconds. Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:26512 pid:28698 tgid:28698 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5264 [inline] __schedule+0x1893/0x4b50 kernel/sched/core.c:6607 __schedule_loop kernel/sched/core.c:6684 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6699 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 ops_init+0x31e/0x590 net/core/net_namespace.c:139 setup_net+0x287/0x9e0 net/core/net_namespace.c:356 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:494 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x619/0xc10 kernel/fork.c:3308 __do_sys_unshare kernel/fork.c:3379 [inline] __se_sys_unshare kernel/fork.c:3377 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3377 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f187b57f6f7 RSP: 002b:00007f187b85ffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f187b5f22ec RCX: 00007f187b57f6f7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 0000000000000000 R08: 00007f187c267d60 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000000c R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000 INFO: task syz-executor:28699 blocked for more than 147 seconds. Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:26352 pid:28699 tgid:28699 ppid:1 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5264 [inline] __schedule+0x1893/0x4b50 kernel/sched/core.c:6607 __schedule_loop kernel/sched/core.c:6684 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6699 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6756 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752 register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 ops_init+0x31e/0x590 net/core/net_namespace.c:139 setup_net+0x287/0x9e0 net/core/net_namespace.c:356 copy_net_ns+0x33f/0x570 net/core/net_namespace.c:494 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x619/0xc10 kernel/fork.c:3308 __do_sys_unshare kernel/fork.c:3379 [inline] __se_sys_unshare kernel/fork.c:3377 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3377 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f829577f6f7 RSP: 002b:00007f8295a5ffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f82957f22ec RCX: 00007f829577f6f7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 0000000000000000 R08: 00007f8296467d60 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000000c R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e9389e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e9389e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e9389e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6701 3 locks held by kworker/1:1/46: #0: ffff88801ac81948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac81948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90000b67d00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000b67d00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x99/0xfd0 net/wireless/reg.c:2480 2 locks held by getty/4986: #0: ffff88802e2db0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:10/6762: 3 locks held by kworker/u8:17/6769: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90003c57d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003c57d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276 3 locks held by kworker/u8:22/6775: #0: ffff88802d87a948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88802d87a948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc90003ca7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90003ca7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4736 4 locks held by kworker/u8:7/12585: #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc9000436fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9000436fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:580 #3: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1f/0x1e0 drivers/net/wireguard/device.c:414 7 locks held by kworker/1:10/17096: 3 locks held by kworker/0:9/17108: #0: ffff88801ac81948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac81948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310 #1: ffffc9001075fd00 ((check_lifetime_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc9001075fd00 ((check_lifetime_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310 #2: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: check_lifetime+0x433/0x960 net/ipv4/devinet.c:757 2 locks held by syz-executor/27174: #0: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3517 #1: ffffffff8e7d28d0 (cpu_hotplug_lock){++++}-{0:0}, at: flush_all_backlogs net/core/dev.c:6021 [inline] #1: ffffffff8e7d28d0 (cpu_hotplug_lock){++++}-{0:0}, at: unregister_netdevice_many_notify+0x5ea/0x1da0 net/core/dev.c:11380 1 lock held by syz-executor/27615: #0: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3517 1 lock held by syz-executor/28293: #0: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3b/0x1b0 drivers/net/tun.c:3517 2 locks held by syz-executor/28691: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28693: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28694: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28698: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28699: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28708: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28712: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28713: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28717: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28718: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28725: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28730: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28735: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28738: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 2 locks held by syz-executor/28740: #0: ffffffff8fcbd010 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:490 #1: ffffffff8fcc9b08 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x290 net/ipv4/nexthop.c:3885 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 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:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xff4/0x1040 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 17096 Comm: kworker/1:10 Not tainted 6.11.0-syzkaller-07337-g2004cef11ea0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: events nsim_dev_trap_report_work RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:lock_acquire+0xdc/0x550 kernel/locking/lockdep.c:5793 Code: 08 0f 83 f4 02 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 a8 5a 1c 90 be 08 00 00 00 e8 7c 20 8c 00 48 0f a3 1d 2c 30 ac 0e <73> 16 e8 5d 7b 0a 00 84 c0 75 0d 80 3d 29 f2 95 0e 00 0f 84 f9 02 RSP: 0018:ffffc90000a17bc0 EFLAGS: 00000257 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81702a74 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901c5aa8 RBP: ffffc90000a17d18 R08: ffffffff901c5aaf R09: 1ffffffff2038b55 R10: dffffc0000000000 R11: fffffbfff2038b56 R12: 1ffff92000142f80 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000030 FS: 0000000000000000(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6338dd2f98 CR3: 000000000e734000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] net_generic include/net/netns/generic.h:45 [inline] synproxy_pernet+0x40/0x240 include/net/netfilter/nf_synproxy.h:32 ipv4_synproxy_hook+0xb5/0x1040 net/netfilter/nf_synproxy_core.c:643 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook+0x2c4/0x450 include/linux/netfilter.h:269 NF_HOOK_COND include/linux/netfilter.h:302 [inline] ip_output+0x185/0x230 net/ipv4/ip_output.c:434 synproxy_send_client_synack+0x8b8/0xf30 net/netfilter/nf_synproxy_core.c:484 nft_synproxy_eval_v4+0x3ca/0x610 net/netfilter/nft_synproxy.c:59 nft_synproxy_do_eval+0x362/0xa60 net/netfilter/nft_synproxy.c:141 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288 nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5662 [inline] __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775 process_backlog+0x662/0x15b0 net/core/dev.c:6107 __napi_poll+0xcb/0x490 net/core/dev.c:6771 napi_poll net/core/dev.c:6840 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6962 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline] nsim_dev_trap_report_work+0x75d/0xaa0 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244