bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) rcu: INFO: rcu_sched detected stalls on CPUs/tasks: rcu: 1-....: (10476 ticks this GP) idle=37e/1/0x4000000000000004 softirq=100162/100388 fqs=2873 rcu: (detected by 0, t=10502 jiffies, g=10225, q=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10900 Comm: syz-executor.2 Not tainted 4.19.206-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:109 Code: 3d 1c 04 3d 0b 01 7f 02 5d c3 89 ef 5d e9 10 cd c9 06 48 c7 c7 00 87 65 8c e8 24 e2 6f 00 eb df 66 90 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffff8880ba107578 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff89cfa1a0 RCX: 0000000000000020 RDX: 1ffffffff139f436 RSI: 00000000000000d5 RDI: 0000000000000380 RBP: ffff8880ba11e2c0 R08: ffffffff8c664058 R09: 0000000000000000 R10: 0000000000000007 R11: ffffffff8c66405b R12: 00000000000000d5 R13: 0000000000000000 R14: ffff8880ba124cc0 R15: ffff8880ba124d30 FS: 00007fd8779ac700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6c69051fe8 CR3: 0000000009e6d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:389 [inline] lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:460 clockevents_program_event+0x234/0x350 kernel/time/clockevents.c:344 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:48 hrtimer_interrupt+0x40a/0x9e0 kernel/time/hrtimer.c:1552 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:memcmp include/linux/string.h:418 [inline] RIP: 0010:__flow_hash_consistentify net/core/flow_dissector.c:1160 [inline] RIP: 0010:__flow_hash_from_keys net/core/flow_dissector.c:1181 [inline] RIP: 0010:flow_hash_from_keys+0xe2/0x7b0 net/core/flow_dissector.c:1194 Code: 0f 84 d2 01 00 00 66 83 fd 03 0f 85 16 01 00 00 e8 73 bf ee fa 48 8d 43 20 ba 10 00 00 00 48 8d 7b 30 48 89 c6 48 89 44 24 08 b9 d4 7b 01 31 ff 41 89 c6 89 c6 e8 bd c0 ee fa 45 85 f6 0f 88 RSP: 0018:ffff8880ba107790 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: ffff8880ba107920 RBX: ffff8880ba107900 RCX: ffffffff8673d334 RDX: 0000000000000010 RSI: ffff8880ba107920 RDI: ffff8880ba107930 RBP: 0000000000000003 R08: 0000000000000010 R09: 0000000000000003 R10: 0000000000000003 R11: 0000000000000000 R12: 1ffff11017420ef5 R13: ffff8880ba107902 R14: ffff8880ba107900 R15: ffff8880563ed350 rt6_multipath_hash+0x1b0/0xd40 net/ipv6/route.c:2094 ip6_route_input+0x940/0xaa0 net/ipv6/route.c:2123 ip6_rcv_finish_core.constprop.0.isra.0+0xd7/0x550 net/ipv6/ip6_input.c:63 ip6_rcv_finish+0x176/0x2f0 net/ipv6/ip6_input.c:74 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0xf2/0x3f0 net/ipv6/ip6_input.c:273 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __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:page_mapcount include/linux/mm.h:642 [inline] RIP: 0010:zap_pte_range mm/memory.c:1351 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1463 [inline] RIP: 0010:zap_pud_range mm/memory.c:1492 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1513 [inline] RIP: 0010:unmap_page_range+0x1a2a/0x2c50 mm/memory.c:1534 Code: e8 db a8 0c 00 48 89 e8 48 c1 e8 03 42 0f b6 14 30 48 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 fc 0e 00 00 41 8b 5d 30 <83> c3 01 e9 88 fa ff ff e8 39 e9 d6 ff 0f 0b e8 32 e9 d6 ff 48 8b RSP: 0018:ffff88803731f770 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 00000000ffffffff RCX: ffffffff818ba955 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea00025b62b0 RBP: ffffea00025b62b0 R08: 0000000000000000 R09: fffff940004b6c56 R10: ffffea00025b62b3 R11: 0000000000000000 R12: dead000000000100 R13: ffffea00025b6280 R14: dffffc0000000000 R15: 00007fd878d79000 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:1015 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1036 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: 0033:0x7fd87a456739 Code: Bad RIP value. RSP: 002b:00007fd8779ac188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: 0000000000000003 RBX: 00007fd87a55b038 RCX: 00007fd87a456739 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020001340 RBP: 00007fd87a4b0cc4 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fd87a55b038 R13: 00007ffc3ce517bf R14: 00007fd8779ac300 R15: 0000000000022000 net_ratelimit: 3025 callbacks suppressed bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:e9:1b:66:84:a0, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:e9:1b:66:84:a0, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:e9:1b:66:84:a0, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) net_ratelimit: 3280 callbacks suppressed bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) ---------------- Code disassembly (best guess): 0: 3d 1c 04 3d 0b cmp $0xb3d041c,%eax 5: 01 7f 02 add %edi,0x2(%rdi) 8: 5d pop %rbp 9: c3 retq a: 89 ef mov %ebp,%edi c: 5d pop %rbp d: e9 10 cd c9 06 jmpq 0x6c9cd22 12: 48 c7 c7 00 87 65 8c mov $0xffffffff8c658700,%rdi 19: e8 24 e2 6f 00 callq 0x6fe242 1e: eb df jmp 0xffffffff 20: 66 90 xchg %ax,%ax 22: 89 ff mov %edi,%edi 24: 89 b7 00 c0 5f ff mov %esi,-0xa04000(%rdi) * 2a: c3 retq <-- trapping instruction 2b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 39: fc ff df 3c: 53 push %rbx 3d: 89 fb mov %edi,%ebx 3f: 48 rex.W