mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P19610 rcu: (detected by 1, t=10503 jiffies, g=48029, q=2351) syz-executor3 R running task 25720 19610 7905 0x00000006 Call Trace: sched_show_task kernel/sched/core.c:5293 [inline] sched_show_task.cold+0x273/0x2d5 kernel/sched/core.c:5268 rcu_print_detail_task_stall_rnp+0xc7/0x103 kernel/rcu/tree_plugin.h:690 rcu_print_detail_task_stall kernel/rcu/tree_plugin.h:703 [inline] print_other_cpu_stall.cold+0x5b4/0x8bb kernel/rcu/tree.c:1289 check_cpu_stall kernel/rcu/tree.c:1429 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks+0xf36/0x1380 kernel/rcu/tree.c:2521 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:xfrm_flowi_dport include/net/xfrm.h:940 [inline] RIP: 0010:__xfrm4_selector_match net/xfrm/xfrm_policy.c:195 [inline] RIP: 0010:xfrm_selector_match+0x7dc/0xfc0 net/xfrm/xfrm_policy.c:219 Code: 05 e8 f8 18 02 fb 0f b7 43 22 48 8d 7b 20 48 89 fa 48 c1 ea 03 66 89 45 d0 48 b8 00 00 00 00 00 fc ff df 0f b6 14 02 48 89 f8 <83> e0 07 83 c0 01 38 d0 7c 09 84 d2 74 05 e8 c1 18 02 fb 45 0f b6 RSP: 0018:ffff88806829f6e0 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a311bc28 RBX: ffff8880a311bc08 RCX: ffffc9000be39000 RDX: 0000000000000000 RSI: ffffffff86c2ba86 RDI: ffff8880a311bc28 RBP: ffff88806829f718 R08: ffff888064ce86c0 R09: 0000000000000000 R10: ffff888064ce86c0 R11: 0000000000000000 R12: ffff88805a9bb310 R13: 0000000000000011 R14: 00000000aa1414ac R15: 0000000000000000 xfrm_policy_match+0x1e9/0x2d0 net/xfrm/xfrm_policy.c:1894 __xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2022 [inline] xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline] xfrm_policy_lookup_bytype+0x95f/0xdb0 net/xfrm/xfrm_policy.c:2113 xfrm_policy_lookup+0x7e/0x90 net/xfrm/xfrm_policy.c:2145 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2939 [inline] xfrm_lookup_with_ifid+0x8cf/0x2a90 net/xfrm/xfrm_policy.c:3080 xfrm_lookup net/xfrm/xfrm_policy.c:3172 [inline] xfrm_lookup_route+0x3b/0x1f0 net/xfrm/xfrm_policy.c:3183 ip_route_output_flow+0xad/0xc0 net/ipv4/route.c:2582 ip_route_connect include/net/route.h:309 [inline] __ip4_datagram_connect+0x7ae/0x1330 net/ipv4/datagram.c:51 ip4_datagram_connect+0x30/0x50 net/ipv4/datagram.c:92 inet_dgram_connect+0x150/0x2e0 net/ipv4/af_inet.c:571 __sys_connect+0x357/0x490 net/socket.c:1664 __do_sys_connect net/socket.c:1675 [inline] __se_sys_connect net/socket.c:1672 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:1672 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9855109c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000010 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f985510a6d4 R13: 00000000004be30a R14: 00000000004ce558 R15: 00000000ffffffff syz-executor3 R running task 25720 19610 7905 0x80000006 Call Trace: sched_show_task kernel/sched/core.c:5293 [inline] sched_show_task.cold+0x273/0x2d5 kernel/sched/core.c:5268 rcu_print_detail_task_stall_rnp+0xc7/0x103 kernel/rcu/tree_plugin.h:690 rcu_print_detail_task_stall kernel/rcu/tree_plugin.h:705 [inline] print_other_cpu_stall.cold+0x613/0x8bb kernel/rcu/tree.c:1289 check_cpu_stall kernel/rcu/tree.c:1429 [inline] rcu_pending kernel/rcu/tree.c:3018 [inline] rcu_check_callbacks+0xf36/0x1380 kernel/rcu/tree.c:2521 update_process_times+0x32/0x80 kernel/time/timer.c:1635 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x3a7/0x1050 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:xfrm_flowi_dport include/net/xfrm.h:940 [inline] RIP: 0010:__xfrm4_selector_match net/xfrm/xfrm_policy.c:195 [inline] RIP: 0010:xfrm_selector_match+0x7dc/0xfc0 net/xfrm/xfrm_policy.c:219 Code: 05 e8 f8 18 02 fb 0f b7 43 22 48 8d 7b 20 48 89 fa 48 c1 ea 03 66 89 45 d0 48 b8 00 00 00 00 00 fc ff df 0f b6 14 02 48 89 f8 <83> e0 07 83 c0 01 38 d0 7c 09 84 d2 74 05 e8 c1 18 02 fb 45 0f b6 RSP: 0018:ffff88806829f6e0 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a311bc28 RBX: ffff8880a311bc08 RCX: ffffc9000be39000 RDX: 0000000000000000 RSI: ffffffff86c2ba86 RDI: ffff8880a311bc28 RBP: ffff88806829f718 R08: ffff888064ce86c0 R09: 0000000000000000 R10: ffff888064ce86c0 R11: 0000000000000000 R12: ffff88805a9bb310 R13: 0000000000000011 R14: 00000000aa1414ac R15: 0000000000000000 xfrm_policy_match+0x1e9/0x2d0 net/xfrm/xfrm_policy.c:1894 __xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2022 [inline] xfrm_policy_eval_candidates net/xfrm/xfrm_policy.c:2053 [inline] xfrm_policy_lookup_bytype+0x95f/0xdb0 net/xfrm/xfrm_policy.c:2113 xfrm_policy_lookup+0x7e/0x90 net/xfrm/xfrm_policy.c:2145 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2939 [inline] xfrm_lookup_with_ifid+0x8cf/0x2a90 net/xfrm/xfrm_policy.c:3080 xfrm_lookup net/xfrm/xfrm_policy.c:3172 [inline] xfrm_lookup_route+0x3b/0x1f0 net/xfrm/xfrm_policy.c:3183 ip_route_output_flow+0xad/0xc0 net/ipv4/route.c:2582 ip_route_connect include/net/route.h:309 [inline] __ip4_datagram_connect+0x7ae/0x1330 net/ipv4/datagram.c:51 ip4_datagram_connect+0x30/0x50 net/ipv4/datagram.c:92 inet_dgram_connect+0x150/0x2e0 net/ipv4/af_inet.c:571 __sys_connect+0x357/0x490 net/socket.c:1664 __do_sys_connect net/socket.c:1675 [inline] __se_sys_connect net/socket.c:1672 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:1672 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9855109c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000010 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f985510a6d4 R13: 00000000004be30a R14: 00000000004ce558 R15: 00000000ffffffff