rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7545/1:b..l rcu: (detected by 1, t=10503 jiffies, g=16221, q=567 ncpus=2) task:syz.4.392 state:R running task stack:22000 pid:7545 tgid:7544 ppid:5848 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078 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:batadv_hardif_get_by_netdev+0x17d/0x4e0 net/batman-adv/hard-interface.c:72 Code: 48 8d 44 24 40 48 c1 e8 03 48 89 04 24 49 c7 c5 80 75 7e 9a 4c 89 74 24 18 49 8d 5c 24 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 79 f7 70 f6 4c 39 33 74 0a e8 3f 97 0a f6 e9 81 RSP: 0018:ffffc900058668a0 EFLAGS: 00000246 RAX: 1ffff11028672a03 RBX: ffff888143395018 RCX: ffff88805dd08000 RDX: 0000000000000000 RSI: ffffffff8c5faec0 RDI: ffffffff8c5fae80 RBP: ffffc90005866948 R08: ffffffff8b94dbd4 R09: 1ffffffff2857910 R10: dffffc0000000000 R11: fffffbfff2857911 R12: ffff888143395000 R13: ffffffff9a7e7580 R14: ffff888078d82000 R15: dffffc0000000000 batadv_hard_if_event+0x82/0x1810 net/batman-adv/hard-interface.c:967 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers net/core/dev.c:2048 [inline] register_netdevice+0x167f/0x1b00 net/core/dev.c:10632 veth_newlink+0x5c6/0xb00 drivers/net/veth.c:1844 rtnl_newlink_create+0x2ee/0xa40 net/core/rtnetlink.c:3786 __rtnl_newlink net/core/rtnetlink.c:3897 [inline] rtnl_newlink+0x1c7e/0x2210 net/core/rtnetlink.c:4012 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6902 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:726 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2594 ___sys_sendmsg net/socket.c:2648 [inline] __sys_sendmsg+0x269/0x350 net/socket.c:2680 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: 0033:0x7fbd06b85d29 RSP: 002b:00007fbd07a9c038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbd06d75fa0 RCX: 00007fbd06b85d29 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00007fbd06c01b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbd06d75fa0 R15: 00007ffcbfb1c2c8 net_ratelimit: 20391 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ae:75:b0:6f:63:73, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 21803 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)