#0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc900049e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc900049e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5e2c90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_unregister_hw+0x55/0x2c0 net/mac80211/main.c:1652 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 0, t=10502 jiffies, g=38837, q=154 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294982243-4294971741), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10502 jiffies! g38837 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:24912 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2029 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2231 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: CPU: 0 PID: 8666 Comm: syz-executor.0 Not tainted 6.10.0-rc3-next-20240611-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:console_flush_all+0x9f7/0xf50 kernel/printk/printk.c:3048 Code: 20 00 90 0f 0b 90 e9 f3 f9 ff ff e8 33 15 20 00 e8 ae 76 17 0a 4d 85 f6 74 c0 e8 24 15 20 00 fb 49 bd 00 00 00 00 00 fc ff df <43> 80 3c 2f 00 48 8b 5c 24 30 74 08 48 89 df e8 d5 23 86 00 4c 8b RSP: 0018:ffffc90000007600 EFLAGS: 00000246 RAX: ffffffff817332cc RBX: 0000000000000000 RCX: ffff8880220e9e00 RDX: 0000000000000102 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000007790 R08: ffffffff81733273 R09: 1ffffffff25f96e8 R10: dffffc0000000000 R11: fffffbfff25f96e9 R12: ffffffff8eb26a60 R13: dffffc0000000000 R14: 0000000000000200 R15: 1ffffffff1d64d57 FS: 00005555938e9480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f26d59e0f00 CR3: 000000007ccf2000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: console_unlock+0x13b/0x4d0 kernel/printk/printk.c:3118 vprintk_emit+0x7a1/0x900 kernel/printk/printk.c:2420 _printk+0xd5/0x120 kernel/printk/printk.c:2447 lockdep_print_held_locks+0x14c/0x210 kernel/locking/lockdep.c:801 debug_show_all_locks+0x197/0x2a0 kernel/locking/lockdep.c:6693 report_rtnl_holders+0x1ec/0x2d0 net/core/rtnetlink.c:109 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5066 Code: c9 50 e8 69 b6 0b 00 48 83 c4 08 4c 89 f7 e8 7d 38 00 00 e9 de 04 00 00 4c 89 f7 e8 40 ff 31 0a e8 0b 30 37 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc RSP: 0018:ffffc90013847628 EFLAGS: 00000282 RAX: f91bf6ebc5626200 RBX: ffff8880220e9e00 RCX: ffffffff947c3803 RDX: dffffc0000000000 RSI: ffffffff8bcac1a0 RDI: ffffffff8c200760 RBP: ffffc90013847670 R08: ffffffff8fae04af R09: 1ffffffff1f5c095 R10: dffffc0000000000 R11: fffffbfff1f5c096 R12: 1ffff11017287ec7 R13: dffffc0000000000 R14: ffff8880b943e8c0 R15: ffff8880b943f638 context_switch kernel/sched/core.c:5195 [inline] __schedule+0x17f0/0x4a20 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_count_add+0x0/0x190 kernel/sched/core.c:5644 Code: c1 03 38 c1 7c 97 48 8b 3c 24 e8 fb e5 96 00 eb 8c e9 ee fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 41 57 41 56 53 89 fb 48 c7 c0 a0 38 7c 94 48 c1 e8 03 RSP: 0018:ffffc900138479f8 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 1ffff1100441d3c0 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: ffffffff8bcac1a0 RDI: 0000000000000001 RBP: ffff8880220e9e00 R08: ffffffff8fae04af R09: 1ffffffff1f5c095 R10: dffffc0000000000 R11: fffffbfff1f5c096 R12: dffffc0000000000 R13: ffffc90013847af8 R14: ffffffff8b93edc0 R15: ffff8880220eb078 __schedule_loop kernel/sched/core.c:6605 [inline] schedule+0x144/0x320 kernel/sched/core.c:6621 futex_wait_queue+0x14e/0x1d0 kernel/futex/waitwake.c:370 __futex_wait+0x17f/0x320 kernel/futex/waitwake.c:669 futex_wait+0x101/0x360 kernel/futex/waitwake.c:697 do_futex+0x33b/0x560 kernel/futex/syscalls.c:102 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x3f9/0x480 kernel/futex/syscalls.c:160 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: 0033:0x7f26d4c7cea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd7c2be148 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 0000000000054ada RCX: 00007f26d4c7cea9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f26d4db412c RBP: 0000000000054d00 R08: 7fffffffffffffff R09: 0000001500000000 R10: 00007ffd7c2be230 R11: 0000000000000246 R12: 00007ffd7c2be230 R13: 00007f26d4db412c R14: 0000000000000226 R15: 00007ffd7c2be250 2 locks held by getty/4845: #0: ffff88802aa060a0 (&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+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:12/7740: 3 locks held by syz-executor.3/8499: #0: ffffffff8f655cd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209 #2: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504 7 locks held by syz-executor.4/8540: 1 lock held by syz-executor.2/8600: 1 lock held by syz-executor.1/8639: #0: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724 3 locks held by syz-executor.0/8666: #0: ffffc90000007c00 (net/core/rtnetlink.c:82){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789 #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: report_rtnl_holders+0x20/0x2d0 net/core/rtnetlink.c:95 #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6689 ============================================= DEBUG: waiting rtnl_mutex for 10744 jiffies. task:kworker/u8:12 state:R running task stack:22960 pid:7740 tgid:7740 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 DEBUG: waiting rtnl_mutex for 10759 jiffies. task:syz-executor.1 state:D stack:21024 pid:8639 tgid:8639 ppid:8636 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7fa1cf07eb9c RSP: 002b:00007ffc64b185f0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fa1cfce4620 RCX: 00007fa1cf07eb9c RDX: 000000000000006c RSI: 00007fa1cfce4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc64b18644 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fa1cfce4670 R15: 0000000000000000 DEBUG: waiting rtnl_mutex for 10793 jiffies. task:kworker/u8:5 state:D stack:19160 pid:1046 tgid:1046 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 ieee80211_unregister_hw+0x55/0x2c0 net/mac80211/main.c:1652 mac80211_hwsim_del_radio+0x2c2/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5576 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6453 ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 DEBUG: waiting rtnl_mutex for 10813 jiffies. task:syz-executor.3 state:D stack:21024 pid:8499 tgid:8499 ppid:8487 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7fd4a207eb9c RSP: 002b:00007ffd898123c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fd4a2ce4620 RCX: 00007fd4a207eb9c RDX: 0000000000000170 RSI: 00007fd4a2ce4670 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007ffd89812414 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005 R13: 0000000000000000 R14: 00007fd4a2ce4670 R15: 0000000000000000 DEBUG: holding rtnl_mutex for 10842 jiffies. task:syz-executor.2 state:R running task stack:21024 pid:8600 tgid:8600 ppid:8594 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:ip_vs_dst_event+0x0/0x6a0 net/netfilter/ipvs/ip_vs_ctl.c:1767 Code: 89 cf 49 89 cf e8 40 36 19 f8 4c 89 f9 e9 76 fc ff ff e8 03 87 aa 01 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 48 89 d5 49 RSP: 0018:ffffc90003c7eb78 EFLAGS: 00000246 RAX: ffffffff81607432 RBX: 0000000000000001 RCX: ffff88802641da00 RDX: ffffc90003c7ec60 RSI: 0000000000000001 RDI: ffffffff8f6a7d60 RBP: 0000000000000001 R08: ffffffff81607420 R09: 1ffffffff1f5c095 R10: dffffc0000000000 R11: ffffffff89e02160 R12: 1ffffffff1ed4fac R13: 00000000ffffffff R14: dffffc0000000000 R15: ffffffff8f6a7d60 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 __dev_notify_flags+0x207/0x400 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8858 do_setlink+0xccd/0x41f0 net/core/rtnetlink.c:2986 __rtnl_newlink net/core/rtnetlink.c:3782 [inline] rtnl_newlink+0x1956/0x22b0 net/core/rtnetlink.c:3829 rtnetlink_rcv_msg+0x892/0x1170 net/core/rtnetlink.c:6727 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7efc4f07eb9c RSP: 002b:00007ffd38ecd280 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007efc4fce4620 RCX: 00007efc4f07eb9c RDX: 0000000000000020 RSI: 00007efc4fce4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd38ecd2d4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007efc4fce4670 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by rcu_exp_gp_kthr/19: 4 locks held by kworker/u8:5/1046: #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc900049e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc900049e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5e2c90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_unregister_hw+0x55/0x2c0 net/mac80211/main.c:1652 2 locks held by getty/4845: #0: ffff88802aa060a0 (&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+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:12/7740: 3 locks held by syz-executor.3/8499: #0: ffffffff8f655cd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209 #2: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504 7 locks held by syz-executor.4/8540: 1 lock held by syz-executor.2/8600: 1 lock held by syz-executor.1/8639: #0: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724 3 locks held by syz-executor.0/8666: #0: ffffc90000007c00 (net/core/rtnetlink.c:82){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789 #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: report_rtnl_holders+0x20/0x2d0 net/core/rtnetlink.c:95 #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6689 3 locks held by syz-executor.0/8669: ============================================= DEBUG: waiting rtnl_mutex for 11032 jiffies. task:kworker/u8:12 state:R running task stack:22960 pid:7740 tgid:7740 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 DEBUG: waiting rtnl_mutex for 11047 jiffies. task:syz-executor.1 state:D stack:21024 pid:8639 tgid:8639 ppid:8636 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7fa1cf07eb9c RSP: 002b:00007ffc64b185f0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fa1cfce4620 RCX: 00007fa1cf07eb9c RDX: 000000000000006c RSI: 00007fa1cfce4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc64b18644 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fa1cfce4670 R15: 0000000000000000 DEBUG: waiting rtnl_mutex for 11081 jiffies. task:kworker/u8:5 state:D stack:19160 pid:1046 tgid:1046 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 ieee80211_unregister_hw+0x55/0x2c0 net/mac80211/main.c:1652 mac80211_hwsim_del_radio+0x2c2/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5576 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6453 ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 DEBUG: waiting rtnl_mutex for 11101 jiffies. task:syz-executor.3 state:D stack:21024 pid:8499 tgid:8499 ppid:8487 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7fd4a207eb9c RSP: 002b:00007ffd898123c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fd4a2ce4620 RCX: 00007fd4a207eb9c RDX: 0000000000000170 RSI: 00007fd4a2ce4670 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007ffd89812414 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005 R13: 0000000000000000 R14: 00007fd4a2ce4670 R15: 0000000000000000 DEBUG: holding rtnl_mutex for 11130 jiffies. task:syz-executor.2 state:R running task stack:21024 pid:8600 tgid:8600 ppid:8594 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:ip_vs_dst_event+0x0/0x6a0 net/netfilter/ipvs/ip_vs_ctl.c:1767 Code: 89 cf 49 89 cf e8 40 36 19 f8 4c 89 f9 e9 76 fc ff ff e8 03 87 aa 01 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 48 89 d5 49 RSP: 0018:ffffc90003c7eb78 EFLAGS: 00000246 RAX: ffffffff81607432 RBX: 0000000000000001 RCX: ffff88802641da00 RDX: ffffc90003c7ec60 RSI: 0000000000000001 RDI: ffffffff8f6a7d60 RBP: 0000000000000001 R08: ffffffff81607420 R09: 1ffffffff1f5c095 R10: dffffc0000000000 R11: ffffffff89e02160 R12: 1ffffffff1ed4fac R13: 00000000ffffffff R14: dffffc0000000000 R15: ffffffff8f6a7d60 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 __dev_notify_flags+0x207/0x400 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8858 do_setlink+0xccd/0x41f0 net/core/rtnetlink.c:2986 __rtnl_newlink net/core/rtnetlink.c:3782 [inline] rtnl_newlink+0x1956/0x22b0 net/core/rtnetlink.c:3829 rtnetlink_rcv_msg+0x892/0x1170 net/core/rtnetlink.c:6727 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7efc4f07eb9c RSP: 002b:00007ffd38ecd280 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007efc4fce4620 RCX: 00007efc4f07eb9c RDX: 0000000000000020 RSI: 00007efc4fce4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd38ecd2d4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007efc4fce4670 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by rcu_exp_gp_kthr/19: 4 locks held by kworker/u8:5/1046: #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc900049e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc900049e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5e2c90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_unregister_hw+0x55/0x2c0 net/mac80211/main.c:1652 2 locks held by getty/4845: #0: ffff88802aa060a0 (&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+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:12/7740: 3 locks held by syz-executor.3/8499: #0: ffffffff8f655cd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209 #2: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504 7 locks held by syz-executor.4/8540: 1 lock held by syz-executor.2/8600: 1 lock held by syz-executor.1/8639: #0: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724 3 locks held by syz-executor.0/8666: #0: ffffc90000007c00 (net/core/rtnetlink.c:82){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789 #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #1: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: report_rtnl_holders+0x20/0x2d0 net/core/rtnetlink.c:95 #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6689 ============================================= DEBUG: waiting rtnl_mutex for 11320 jiffies. task:kworker/u8:12 state:R running task stack:22960 pid:7740 tgid:7740 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 DEBUG: waiting rtnl_mutex for 11335 jiffies. task:syz-executor.1 state:D stack:21024 pid:8639 tgid:8639 ppid:8636 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7fa1cf07eb9c RSP: 002b:00007ffc64b185f0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fa1cfce4620 RCX: 00007fa1cf07eb9c RDX: 000000000000006c RSI: 00007fa1cfce4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffc64b18644 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fa1cfce4670 R15: 0000000000000000 DEBUG: waiting rtnl_mutex for 11369 jiffies. task:kworker/u8:5 state:D stack:19160 pid:1046 tgid:1046 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 ieee80211_unregister_hw+0x55/0x2c0 net/mac80211/main.c:1652 mac80211_hwsim_del_radio+0x2c2/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5576 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6453 ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 DEBUG: waiting rtnl_mutex for 11389 jiffies. task:syz-executor.3 state:D stack:21024 pid:8499 tgid:8499 ppid:8487 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752 wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7fd4a207eb9c RSP: 002b:00007ffd898123c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fd4a2ce4620 RCX: 00007fd4a207eb9c RDX: 0000000000000170 RSI: 00007fd4a2ce4670 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007ffd89812414 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005 R13: 0000000000000000 R14: 00007fd4a2ce4670 R15: 0000000000000000 DEBUG: holding rtnl_mutex for 11418 jiffies. task:syz-executor.2 state:R running task stack:21024 pid:8600 tgid:8600 ppid:8594 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5192 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6529 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:ip_vs_dst_event+0x0/0x6a0 net/netfilter/ipvs/ip_vs_ctl.c:1767 Code: 89 cf 49 89 cf e8 40 36 19 f8 4c 89 f9 e9 76 fc ff ff e8 03 87 aa 01 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 48 89 d5 49 RSP: 0018:ffffc90003c7eb78 EFLAGS: 00000246 RAX: ffffffff81607432 RBX: 0000000000000001 RCX: ffff88802641da00 RDX: ffffc90003c7ec60 RSI: 0000000000000001 RDI: ffffffff8f6a7d60 RBP: 0000000000000001 R08: ffffffff81607420 R09: 1ffffffff1f5c095 R10: dffffc0000000000 R11: ffffffff89e02160 R12: 1ffffffff1ed4fac R13: 00000000ffffffff R14: dffffc0000000000 R15: ffffffff8f6a7d60 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 __dev_notify_flags+0x207/0x400 dev_change_flags+0xf0/0x1a0 net/core/dev.c:8858 do_setlink+0xccd/0x41f0 net/core/rtnetlink.c:2986 __rtnl_newlink net/core/rtnetlink.c:3782 [inline] rtnl_newlink+0x1956/0x22b0 net/core/rtnetlink.c:3829 rtnetlink_rcv_msg+0x892/0x1170 net/core/rtnetlink.c:6727 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192 __do_sys_sendto net/socket.c:2204 [inline] __se_sys_sendto net/socket.c:2200 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2200 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: 0033:0x7efc4f07eb9c RSP: 002b:00007ffd38ecd280 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007efc4fce4620 RCX: 00007efc4f07eb9c RDX: 0000000000000020 RSI: 00007efc4fce4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd38ecd2d4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007efc4fce4670 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by rcu_exp_gp_kthr/19: 4 locks held by kworker/u8:5/1046: #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline] #0: ffff888015ed5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329 #1: ffffc900049e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline] #1: ffffc900049e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329 #2: ffffffff8f5e2c90 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594 #3: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_unregister_hw+0x55/0x2c0 net/mac80211/main.c:1652 2 locks held by getty/4845: #0: ffff88802aa060a0 (&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+0x6b5/0x1e10 drivers/tty/n_tty.c:2211 3 locks held by kworker/u8:12/7740: 3 locks held by syz-executor.3/8499: #0: ffffffff8f655cd0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218 #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:35 [inline] #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:60 [inline] #1: ffffffff8f655b88 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xec0 net/netlink/genetlink.c:1209 #2: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: wg_set_device+0x102/0x2160 drivers/net/wireguard/netlink.c:504 7 locks held by syz-executor.4/8540: 1 lock held by syz-executor.2/8600: 1 lock held by syz-executor.1/8639: #0: ffffffff8f5ef4c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724 4 locks held by syz-executor.0/8667: #0: ffffc90000a47020 (&futex_queues[i].lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #0: ffffc90000a47020 (&futex_queues[i].lock){+.+.}-{2:2}, at: futex_q_lock+0x193/0x230 kernel/futex/core.c:545 #1: ffffc90000007c00 (net/core/rtnetlink.c:82){+.-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789 #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #2: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: report_rtnl_holders+0x20/0x2d0 net/core/rtnetlink.c:95 #3: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #3: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #3: ffffffff8e3354a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6689 =============================================