rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P28405 rcu: (detected by 0, t=10503 jiffies, g=170345, q=2544) syz-executor2 R running task 24920 28405 7753 0x00000006 Call Trace: sched_show_task.cold.86+0x2b6/0x30a kernel/sched/core.c:5293 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.69+0x5b5/0x8db 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+0xfe8/0x1410 kernel/rcu/tree.c:2521 update_process_times+0x2d/0x70 kernel/time/timer.c:1635 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:161 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:__sanitizer_cov_trace_pc+0x2b/0x50 kernel/kcov.c:104 Code: 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 c8 47 80 7e 81 e2 00 01 1f 00 75 2b 8b 90 d8 12 00 00 83 fa 02 75 20 <48> 8b 88 e0 12 00 00 8b 80 dc 12 00 00 48 8b 11 48 83 c2 01 48 39 RSP: 0018:ffff888097087408 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a944a500 RBX: ffff888091822040 RCX: ffffffff86c3a37f RDX: 0000000000000002 RSI: ffffffff86c3a390 RDI: 0000000000000004 RBP: ffff888097087408 R08: ffff8880a944a500 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880a944a500 R12: 0000000000000002 R13: ffff888062d63290 R14: 0000000000000000 R15: 0000000000000000 xfrm_policy_match+0xe0/0x2d0 net/xfrm/xfrm_policy.c:1890 __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+0xa1a/0xe70 net/xfrm/xfrm_policy.c:2113 xfrm_policy_lookup+0x7e/0x80 net/xfrm/xfrm_policy.c:2145 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2939 [inline] xfrm_lookup_with_ifid+0x972/0x2b80 net/xfrm/xfrm_policy.c:3080 xfrm_lookup net/xfrm/xfrm_policy.c:3172 [inline] xfrm_lookup_route+0x3c/0x1f0 net/xfrm/xfrm_policy.c:3183 ip_route_output_flow+0xb1/0xc0 net/ipv4/route.c:2582 ip_route_connect include/net/route.h:309 [inline] __ip4_datagram_connect+0x70e/0x1330 net/ipv4/datagram.c:51 ip4_datagram_connect+0x2f/0x50 net/ipv4/datagram.c:92 inet_dgram_connect+0x154/0x2e0 net/ipv4/af_inet.c:571 __sys_connect+0x37d/0x4c0 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+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4579b9 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff29af89c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9 RDX: 0000000000000010 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff29af8a6d4 R13: 00000000004be128 R14: 00000000004ce2d8 R15: 00000000ffffffff syz-executor2 R running task 24920 28405 7753 0x80000006 Call Trace: sched_show_task.cold.86+0x2b6/0x30a kernel/sched/core.c:5293 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.69+0x615/0x8db 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+0xfe8/0x1410 kernel/rcu/tree.c:2521 update_process_times+0x2d/0x70 kernel/time/timer.c:1635 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:161 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1271 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline] smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1060 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:__sanitizer_cov_trace_pc+0x2b/0x50 kernel/kcov.c:104 Code: 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 c8 47 80 7e 81 e2 00 01 1f 00 75 2b 8b 90 d8 12 00 00 83 fa 02 75 20 <48> 8b 88 e0 12 00 00 8b 80 dc 12 00 00 48 8b 11 48 83 c2 01 48 39 RSP: 0018:ffff888097087408 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8880a944a500 RBX: ffff888091822040 RCX: ffffffff86c3a37f RDX: 0000000000000002 RSI: ffffffff86c3a390 RDI: 0000000000000004 RBP: ffff888097087408 R08: ffff8880a944a500 R09: 0000000000000000 R10: 0000000000000000 R11: ffff8880a944a500 R12: 0000000000000002 R13: ffff888062d63290 R14: 0000000000000000 R15: 0000000000000000 xfrm_policy_match+0xe0/0x2d0 net/xfrm/xfrm_policy.c:1890 __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+0xa1a/0xe70 net/xfrm/xfrm_policy.c:2113 xfrm_policy_lookup+0x7e/0x80 net/xfrm/xfrm_policy.c:2145 xfrm_bundle_lookup net/xfrm/xfrm_policy.c:2939 [inline] xfrm_lookup_with_ifid+0x972/0x2b80 net/xfrm/xfrm_policy.c:3080 xfrm_lookup net/xfrm/xfrm_policy.c:3172 [inline] xfrm_lookup_route+0x3c/0x1f0 net/xfrm/xfrm_policy.c:3183 ip_route_output_flow+0xb1/0xc0 net/ipv4/route.c:2582 ip_route_connect include/net/route.h:309 [inline] __ip4_datagram_connect+0x70e/0x1330 net/ipv4/datagram.c:51 ip4_datagram_connect+0x2f/0x50 net/ipv4/datagram.c:92 inet_dgram_connect+0x154/0x2e0 net/ipv4/af_inet.c:571 __sys_connect+0x37d/0x4c0 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+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4579b9 Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff29af89c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9 RDX: 0000000000000010 RSI: 0000000020000080 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff29af8a6d4 R13: 00000000004be128 R14: 00000000004ce2d8 R15: 00000000ffffffff