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:96:4a:c7:7d:a5:28, 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) INFO: task syz-executor.4:16379 blocked for more than 140 seconds. Not tainted 5.0.0-rc7+ #86 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29984 16379 7737 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3485 schedule+0x92/0x180 kernel/sched/core.c:3529 exp_funnel_lock kernel/rcu/tree_exp.h:319 [inline] _synchronize_rcu_expedited.constprop.0+0x4d4/0x530 kernel/rcu/tree_exp.h:622 synchronize_rcu_expedited+0x27/0xa0 kernel/rcu/tree_exp.h:762 synchronize_net+0x3b/0x60 net/core/dev.c:9247 __unregister_prot_hook+0x274/0x2f0 net/packet/af_packet.c:349 packet_do_bind+0x6b3/0xc40 net/packet/af_packet.c:3088 packet_bind+0x15d/0x1c0 net/packet/af_packet.c:3171 __sys_bind+0x23f/0x290 net/socket.c:1503 __do_sys_bind net/socket.c:1514 [inline] __se_sys_bind net/socket.c:1512 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1512 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 Code: Bad RIP value. RSP: 002b:00007fa0dab03c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RDX: 0000000000000014 RSI: 0000000020000000 RDI: 0000000000000007 RBP: 000000000073c220 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa0dab046d4 R13: 00000000004bdeff R14: 00000000004ce460 R15: 00000000ffffffff Showing all locks held in the system: 5 locks held by ksoftirqd/1/16: 1 lock held by khungtaskd/1041: #0: 00000000acf97649 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4389 2 locks held by rsyslogd/7574: 2 locks held by getty/7686: #0: 000000004e7f9711 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a4a4e7cb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7687: #0: 000000006e783b4f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000fd1c090d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7688: #0: 00000000cc600855 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000069068698 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7689: #0: 00000000ac281d63 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000000e2f7a07 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7690: #0: 00000000d4f80b89 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000003cfee8d0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7691: #0: 00000000129d7fcd (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000b740801c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 2 locks held by getty/7692: #0: 00000000a4be94ba (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a909068a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2154 1 lock held by syz-executor.4/16379: #0: 000000004c049404 (sk_lock-AF_PACKET){+.+.}, at: lock_sock include/net/sock.h:1507 [inline] #0: 000000004c049404 (sk_lock-AF_PACKET){+.+.}, at: packet_do_bind+0x33/0xc40 net/packet/af_packet.c:3050 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1041 Comm: khungtaskd Not tainted 5.0.0-rc7+ #86 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x9df/0xee0 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.0.0-rc7+ #86 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.810 msecs Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kernel_text_address+0x6/0xf0 kernel/extable.c:123 Code: cc 0f 1f 00 31 c0 48 81 ff 00 00 80 88 72 0c 31 c0 48 81 ff 80 c6 5e 89 0f 92 c0 c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 54 <49> 89 fc 48 83 ec 08 48 81 ff 00 00 00 81 72 09 48 81 ff 81 5a 40 RSP: 0018:ffff8880aa2c68b0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff81a73392 RCX: 0000000000000000 RDX: 1ffff11015458d29 RSI: 1ffff11015458d00 RDI: ffffffff81a73392 RBP: ffff8880aa2c68b8 R08: 0000000000000001 R09: ffff8880aa2c6950 R10: ffff8880aa2c6928 R11: ffff8880aa2c6938 R12: ffff8880aa2c6948 R13: 0000000000000000 R14: ffff8880aa2b2440 R15: 00000000000005dc FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe26dda9a8 CR3: 000000009627d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __kernel_text_address+0xd/0x40 kernel/extable.c:107 unwind_get_return_address arch/x86/kernel/unwind_frame.c:18 [inline] unwind_get_return_address+0x61/0xa0 arch/x86/kernel/unwind_frame.c:13 __save_stack_trace+0x8a/0xf0 arch/x86/kernel/stacktrace.c:45 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x45/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:457 kasan_slab_free+0xe/0x10 mm/kasan/common.c:465 __cache_free mm/slab.c:3494 [inline] kmem_cache_free+0x86/0x260 mm/slab.c:3754 __skb_ext_put+0xd9/0x210 net/core/skbuff.c:5736 __skb_ext_del+0xd7/0x2c0 net/core/skbuff.c:5707 skb_ext_del include/linux/skbuff.h:3997 [inline] nf_bridge_info_free net/bridge/br_netfilter_hooks.c:135 [inline] br_nf_dev_queue_xmit+0x377/0x14c0 net/bridge/br_netfilter_hooks.c:770 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] br_nf_post_routing+0x7aa/0x1250 net/bridge/br_netfilter_hooks.c:817 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] br_forward_finish+0x215/0x400 net/bridge/br_forward.c:69 br_nf_hook_thresh+0x2ec/0x380 net/bridge/br_netfilter_hooks.c:1004 br_nf_forward_finish+0x2eb/0x690 net/bridge/br_netfilter_hooks.c:539 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] br_nf_forward_ip net/bridge/br_netfilter_hooks.c:607 [inline] br_nf_forward_ip+0x877/0x1630 net/bridge/br_netfilter_hooks.c:550 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] __br_forward+0x393/0xb00 net/bridge/br_forward.c:113 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:129 br_flood+0x5fa/0x710 net/bridge/br_forward.c:238 br_handle_frame_finish+0xf4e/0x14c0 net/bridge/br_input.c:169 br_nf_hook_thresh+0x2ec/0x380 net/bridge/br_netfilter_hooks.c:1004 br_nf_pre_routing_finish_ipv6+0x700/0xdc0 net/bridge/br_netfilter_ipv6.c:210 NF_HOOK include/linux/netfilter.h:289 [inline] br_nf_pre_routing_ipv6+0x3c4/0x740 net/bridge/br_netfilter_ipv6.c:238 br_nf_pre_routing+0xe80/0x13a0 net/bridge/br_netfilter_hooks.c:482 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] NF_HOOK include/linux/netfilter.h:287 [inline] br_handle_frame+0x95b/0x1450 net/bridge/br_input.c:305 __netif_receive_skb_core+0xa96/0x3010 net/core/dev.c:4902 __netif_receive_skb_one_core+0xa8/0x1a0 net/core/dev.c:4971 __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083 process_backlog+0x206/0x750 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x4fa/0x1070 net/core/dev.c:6412 __do_softirq+0x266/0x95a kernel/softirq.c:292 run_ksoftirqd kernel/softirq.c:654 [inline] run_ksoftirqd+0x8e/0x110 kernel/softirq.c:646 smpboot_thread_fn+0x6ab/0xa10 kernel/smpboot.c:164 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352