bridge0: received packet on veth0_to_bridge with own address as source address (addr:fa:da:05:89:fe:3a, 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) rcu: INFO: rcu_sched detected stalls on CPUs/tasks: rcu: 1-....: (10487 ticks this GP) idle=0aa/1/0x4000000000000002 softirq=47683/47863 fqs=3234 rcu: (detected by 0, t=10502 jiffies, g=4573, q=3) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 22991 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x25d/0x3ff0 kernel/locking/lockdep.c:3322 Code: 85 c0 0f 84 38 ff ff ff 48 8d b8 38 01 00 00 be 04 00 00 00 48 89 44 24 10 e8 bf 54 4d 00 48 8b 44 24 10 f0 ff 80 38 01 00 00 <49> 8d b5 80 08 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 f1 48 89 RSP: 0018:ffff8880ba107088 EFLAGS: 00000006 RAX: ffffffff8cd642f0 RBX: 0000000000000000 RCX: ffffffff814afa31 RDX: fffffbfff19ac886 RSI: 0000000000000004 RDI: ffffffff8cd64428 RBP: 0000000000000002 R08: 0000000000000001 R09: fffffbfff19ac885 R10: ffffffff8cd6442b R11: ffffffff8c66505b R12: 0000000000000001 R13: ffff88809f7320c0 R14: ffffffff89f95488 R15: 0000000000000001 FS: 00007f9c1f759700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efed0ff5004 CR3: 0000000009e6d000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] ktime_get_update_offsets_now+0xcd/0x460 kernel/time/timekeeping.c:2225 hrtimer_update_base kernel/time/hrtimer.c:621 [inline] hrtimer_interrupt+0x449/0x9e0 kernel/time/hrtimer.c:1617 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:kmem_cache_alloc+0x115/0x370 mm/slab.c:3559 Code: 0f 0d 0c 24 f6 c7 80 74 09 4d 85 e4 0f 85 5d 02 00 00 8b 15 a9 d3 8e 09 4c 89 e6 4c 89 f7 21 da e8 40 46 00 00 0f 1f 44 00 00 <4c> 89 ef 89 ea 4c 89 e6 e8 2e 46 00 00 45 8b 75 14 4c 8b 7c 24 30 RSP: 0018:ffff8880ba1074d0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000083400272 RBX: 0000000000480020 RCX: 0000000000000000 RDX: ffffffff88400265 RSI: 0000000000000010 RDI: 0000000000000000 RBP: 0000000000480020 R08: 0000000000480020 R09: 0000000000000002 R10: 000000005bd21fcc R11: 0000000069ea91a1 R12: ffff8880541c4140 R13: ffff8880b5b8fd80 R14: ffff8880b5b8fd80 R15: 0000000000000286 skb_clone+0x151/0x3d0 net/core/skbuff.c:1293 deliver_clone net/bridge/br_forward.c:123 [inline] br_flood+0x3a7/0x4d0 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:page_remove_rmap+0x0/0x120 mm/rmap.c:1295 Code: 00 e9 25 f3 ff ff 4c 89 f7 e8 5c 2f 08 00 e9 3c f6 ff ff e8 52 2f 08 00 e9 7a f6 ff ff e8 48 2f 08 00 e9 97 f6 ff ff 0f 1f 00 <41> 56 41 55 41 54 55 48 89 fd 53 89 f3 e8 3e 52 d2 ff 48 8d 7d 08 RSP: 0018:ffff8880aee97768 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: ffffffff818ba030 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0002707180 RBP: ffffea0002707188 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dead000000000100 R13: ffffea0002707180 R14: dffffc0000000000 R15: 00007f9c220c7000 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: 0033:0x7f9c22204ae9 Code: Bad RIP value. RSP: 002b:00007f9c1f759188 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: 0000000000000000 RBX: 00007f9c22318020 RCX: 00007f9c22204ae9 RDX: 0000000000000080 RSI: 0000000020000280 RDI: 0000000000000005 RBP: 00007f9c2225ef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe985ed35f R14: 00007f9c1f759300 R15: 0000000000022000 rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 1-... } 10955 jiffies s: 485 root: 0x2/. rcu: blocking rcu_node structures: Task dump for CPU 1: net_ratelimit: 14105 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:fa:da:05:89:fe:3a, 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 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 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) syz-executor.5 R running task 27512 22991 12251 0x80000008 Call Trace: net_ratelimit: 13701 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:fa:da:05:89:fe:3a, 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: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 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 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) ---------------- Code disassembly (best guess): 0: 85 c0 test %eax,%eax 2: 0f 84 38 ff ff ff je 0xffffff40 8: 48 8d b8 38 01 00 00 lea 0x138(%rax),%rdi f: be 04 00 00 00 mov $0x4,%esi 14: 48 89 44 24 10 mov %rax,0x10(%rsp) 19: e8 bf 54 4d 00 callq 0x4d54dd 1e: 48 8b 44 24 10 mov 0x10(%rsp),%rax 23: f0 ff 80 38 01 00 00 lock incl 0x138(%rax) * 2a: 49 8d b5 80 08 00 00 lea 0x880(%r13),%rsi <-- trapping instruction 31: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 38: fc ff df 3b: 48 89 f1 mov %rsi,%rcx 3e: 48 rex.W 3f: 89 .byte 0x89