bridge0: received packet on veth0_to_bridge with own address as source address (addr:ca:0d:93:40:ad:62, 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 veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) rcu: INFO: rcu_sched self-detected stall on CPU rcu: 0-....: (10488 ticks this GP) idle=3ea/1/0x4000000000000004 softirq=179672/179881 fqs=2851 rcu: (t=10501 jiffies g=51401 q=1) NMI backtrace for cpu 0 CPU: 0 PID: 25934 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x62d/0xe19 kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1650 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1465 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:ip6table_filter_hook+0x6/0x70 net/ipv6/netfilter/ip6table_filter.c:40 Code: 00 00 00 5b 5d 41 5c e9 78 38 49 fa 48 89 ef e8 60 15 7f fa eb a8 48 89 ef e8 26 18 7f fa eb d8 0f 1f 40 00 41 54 49 89 f4 55 <48> 89 d5 53 e8 51 38 49 fa 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffff8880ba0072b8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff87194d10 RBX: ffff888099112c00 RCX: ffffffff86a1e1ac RDX: ffff8880ba007368 RSI: ffff888092edd7c0 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000000000004 R11: 0000000000000000 R12: ffff888092edd7c0 R13: ffff888092edd7c0 R14: ffff8880ba007368 R15: dffffc0000000000 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] br_nf_forward_ip+0xc72/0x15e0 net/bridge/br_netfilter_hooks.c:620 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] __br_forward+0x354/0xae0 net/bridge/br_forward.c:113 deliver_clone net/bridge/br_forward.c:129 [inline] br_flood+0x3c2/0x4d0 net/bridge/br_forward.c:238 br_handle_frame_finish+0xf41/0x1410 net/bridge/br_input.c:167 br_nf_hook_thresh+0x2a3/0x330 net/bridge/br_netfilter_hooks.c:1014 br_nf_pre_routing_finish_ipv6+0x6e3/0xd40 net/bridge/br_netfilter_ipv6.c:210 NF_HOOK include/linux/netfilter.h:289 [inline] br_nf_pre_routing_ipv6+0x3f4/0x860 net/bridge/br_netfilter_ipv6.c:240 br_nf_pre_routing+0xf05/0x1500 net/bridge/br_netfilter_hooks.c:494 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] br_handle_frame+0xa60/0x13b0 net/bridge/br_input.c:306 __netif_receive_skb_core+0x929/0x3270 net/core/dev.c:4876 __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:4952 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__mod_node_page_state+0x8d/0xf0 mm/vmstat.c:352 Code: f0 01 4c 01 eb 65 41 8a 07 48 0f be c0 48 39 c3 7f 27 48 f7 d8 48 39 d8 7f 1f 48 c7 c7 20 ec 71 88 e8 07 73 f0 01 65 88 5d 00 <48> 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 4e 8d 24 e5 c8 4c 00 RSP: 0018:ffff888091edf6c0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: fffffffffffffff3 RCX: ffffffff83771e23 RDX: 0000000000000000 RSI: ffffffff83771e31 RDI: 0000000000000005 RBP: 000000000002eed6 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 000000000000000d R13: ffffffffffffffff R14: ffff88813fffb000 R15: 000000000002eec8 __mod_lruvec_page_state include/linux/memcontrol.h:698 [inline] page_remove_file_rmap+0x7ea/0xa30 mm/rmap.c:1241 page_remove_rmap+0xe5/0x120 mm/rmap.c:1297 zap_pte_range mm/memory.c:1350 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x147d/0x2c50 mm/memory.c:1534 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f171602d059 Code: Bad RIP value. RSP: 002b:00007f171491e168 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000015 RBX: 00007f17161402a0 RCX: 00007f171602d059 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00007f171608708d R08: 0000000000000008 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2d13af2f R14: 00007f171491e300 R15: 0000000000022000 rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 10950 jiffies s: 3113 root: 0x1/. rcu: blocking rcu_node structures: Task dump for CPU 0: syz-executor.0 R running task 27568 25934 1558 0x8000000c Call Trace: net_ratelimit: 8277 callbacks suppressed 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:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:ca:0d:93:40:ad:62, 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:aa:aa:aa:aa:aa:0c, 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) 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:ca:0d:93:40:ad:62, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 9998 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 veth0_to_bridge with own address as source address (addr:ca:0d:93:40:ad:62, 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:aa:aa:aa:aa:aa:0c, 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) 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:ca:0d:93:40:ad:62, 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 veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 5b 5d add %bl,0x5d(%rbx) 5: 41 5c pop %r12 7: e9 78 38 49 fa jmpq 0xfa493884 c: 48 89 ef mov %rbp,%rdi f: e8 60 15 7f fa callq 0xfa7f1574 14: eb a8 jmp 0xffffffbe 16: 48 89 ef mov %rbp,%rdi 19: e8 26 18 7f fa callq 0xfa7f1844 1e: eb d8 jmp 0xfffffff8 20: 0f 1f 40 00 nopl 0x0(%rax) 24: 41 54 push %r12 26: 49 89 f4 mov %rsi,%r12 29: 55 push %rbp * 2a: 48 89 d5 mov %rdx,%rbp <-- trapping instruction 2d: 53 push %rbx 2e: e8 51 38 49 fa callq 0xfa493884 33: 48 8d 7d 20 lea 0x20(%rbp),%rdi 37: 48 rex.W 38: b8 00 00 00 00 mov $0x0,%eax 3d: 00 fc add %bh,%ah 3f: ff .byte 0xff