rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6110/1:b..l P5220/1:b..l rcu: (detected by 0, t=10503 jiffies, g=13125, q=1186 ncpus=2) task:klogd state:R running task stack:24712 pid:5220 tgid:5220 ppid:1 task_flags:0x400100 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6961 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288 irqentry_exit+0x36/0x90 kernel/entry/common.c:197 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:398 [inline] RIP: 0010:__rcu_read_unlock+0x73/0x620 kernel/rcu/tree_plugin.h:435 Code: 9b 4e 33 12 49 8d bc 24 44 04 00 00 8b 9d 44 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 83 eb 01 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f3 01 00 00 41 RSP: 0018:ffffc900030f7490 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900030f7484 RDX: 0000000000000000 RSI: ffffffff8de1fa7e RDI: ffff88807eb48444 RBP: ffff88807eb48000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000093489 R12: ffff88807eb48000 R13: ffffc900030f7530 R14: ffffc900030f7d28 R15: ffffc900030f7564 rcu_read_unlock include/linux/rcupdate.h:873 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x3fe/0x20a0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x160/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x84/0x1a0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895 discard_slab mm/slub.c:2753 [inline] __put_partials+0x165/0x1c0 mm/slub.c:3218 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] kmem_cache_alloc_node_noprof+0x1d5/0x3b0 mm/slub.c:4281 __alloc_skb+0x2b2/0x380 net/core/skbuff.c:659 alloc_skb include/linux/skbuff.h:1336 [inline] alloc_skb_with_frags+0xe0/0x860 net/core/skbuff.c:6665 sock_alloc_send_pskb+0x7fb/0x990 net/core/sock.c:2980 unix_dgram_sendmsg+0x3e9/0x17f0 net/unix/af_unix.c:2153 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg net/socket.c:729 [inline] __sys_sendto+0x4a0/0x520 net/socket.c:2228 __do_sys_sendto net/socket.c:2235 [inline] __se_sys_sendto net/socket.c:2231 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2231 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f85e54e5407 RSP: 002b:00007ffd22d1bb90 EFLAGS: 00000202 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f85e5395c80 RCX: 00007f85e54e5407 RDX: 00000000000000a1 RSI: 00007ffd22d1bcd0 RDI: 0000000000000003 RBP: 00007ffd22d1c100 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffd22d1c118 R13: 00007ffd22d1bcd0 R14: 0000000000000086 R15: 00007ffd22d1bcd0 task:dhcpcd state:R running task stack:26472 pid:6110 tgid:6110 ppid:5526 task_flags:0x400140 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6961 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7288 irqentry_exit+0x36/0x90 kernel/entry/common.c:197 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_is_held_type+0x107/0x150 kernel/locking/lockdep.c:5945 Code: 00 00 b8 ff ff ff ff 65 0f c1 05 0c 51 46 08 83 f8 01 75 2d 9c 58 f6 c4 02 75 43 48 f7 04 24 00 02 00 00 74 01 fb 48 83 c4 08 <44> 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 45 31 ed eb RSP: 0018:ffffc90003e1fa18 EFLAGS: 00000286 RAX: 0000000000000046 RBX: ffff888021f00b18 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8de1fa7e RDI: ffffffff8c15ee00 RBP: ffffffff8e5c10a0 R08: 0000000000000006 R09: 0000000000001000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888021f00000 R13: 0000000000000001 R14: 00000000ffffffff R15: 0000000000000001 lookup_page_ext+0x10d/0x1d0 mm/page_ext.c:254 page_ext_iter_begin include/linux/page_ext.h:132 [inline] __page_table_check_zero+0x1a4/0x5d0 mm/page_table_check.c:139 page_table_check_free include/linux/page_table_check.h:43 [inline] free_pages_prepare mm/page_alloc.c:1396 [inline] __free_frozen_pages+0x7b7/0x10f0 mm/page_alloc.c:2895 discard_slab mm/slub.c:2753 [inline] __put_partials+0x165/0x1c0 mm/slub.c:3218 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4180 [inline] slab_alloc_node mm/slub.c:4229 [inline] __do_kmalloc_node mm/slub.c:4364 [inline] __kmalloc_noprof+0x1d4/0x510 mm/slub.c:4377 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] lsm_blob_alloc+0x68/0x90 security/security.c:684 lsm_sock_alloc security/security.c:4869 [inline] security_sk_alloc+0x30/0x270 security/security.c:4885 sk_prot_alloc+0x1c7/0x2a0 net/core/sock.c:2242 sk_alloc+0x36/0xc20 net/core/sock.c:2295 packet_create+0x127/0x8e0 net/packet/af_packet.c:3401 __sock_create+0x335/0x8d0 net/socket.c:1589 sock_create net/socket.c:1647 [inline] __sys_socket_create net/socket.c:1684 [inline] __sys_socket+0x14d/0x260 net/socket.c:1731 __do_sys_socket net/socket.c:1745 [inline] __se_sys_socket net/socket.c:1743 [inline] __x64_sys_socket+0x72/0xb0 net/socket.c:1743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa74e357707 RSP: 002b:00007ffc2ef29608 EFLAGS: 00000202 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000557baeb7d950 RCX: 00007fa74e357707 RDX: 0000000000000300 RSI: 0000000000080803 RDI: 0000000000000011 RBP: 0000557b72bd24b0 R08: 00007fa74e426ac0 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000202 R12: 0000000000000000 R13: 0000557baeb76e70 R14: 0000000000000000 R15: 0000557b72be7ac0 net_ratelimit: 13519 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:92:36:fa:26:f2:3c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:92:36:fa:26:f2:3c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:92:36:fa:26:f2:3c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:92:36:fa:26:f2:3c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:92:36:fa:26:f2:3c, vlan:0)