bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6309/1:b..l rcu: (detected by 0, t=10503 jiffies, g=12001, q=731 ncpus=2) task:syz.0.269 state:R running task stack:23808 pid:6309 tgid:6309 ppid:5244 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6682 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7004 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:kernel_text_address+0x7/0xe0 kernel/extable.c:95 Code: ca 08 c2 0f b6 c2 5b c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 56 <53> 48 89 fb 48 c7 c0 00 00 00 81 bd 01 00 00 00 48 39 c7 72 0c 48 RSP: 0018:ffffc900047b7098 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff81fe63e3 RCX: 0000000080000000 RDX: dffffc0000000000 RSI: ffffc900047b0000 RDI: ffffffff81fe63e3 RBP: ffffc900047b7170 R08: ffffc900047b7638 R09: 0000000000000000 R10: ffffc900047b7130 R11: fffff520008f6e28 R12: ffff88802d383c00 R13: ffffffff8180a0e0 R14: dffffc0000000000 R15: 1ffff920008f6e25 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfd/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x76/0x430 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1108 [inline] free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2638 discard_slab mm/slub.c:2677 [inline] __put_partials+0xeb/0x130 mm/slub.c:3145 put_cpu_partial+0x17c/0x250 mm/slub.c:3220 __slab_free+0x2ea/0x3d0 mm/slub.c:4449 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x23/0xb0 mm/kasan/common.c:385 kasan_kmalloc include/linux/kasan.h:257 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4295 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] kobject_uevent_env+0x28b/0x8e0 lib/kobject_uevent.c:540 device_del+0x7db/0x9b0 drivers/base/core.c:3882 unregister_netdevice_many_notify+0x1859/0x1da0 net/core/dev.c:11513 unregister_netdevice_many net/core/dev.c:11541 [inline] unregister_netdevice_queue+0x303/0x370 net/core/dev.c:11413 unregister_netdevice include/linux/netdevice.h:3178 [inline] __tun_detach+0x6b9/0x1600 drivers/net/tun.c:685 tun_detach drivers/net/tun.c:701 [inline] tun_chr_close+0x105/0x1b0 drivers/net/tun.c:3517 __fput+0x23f/0x880 fs/file_table.c:431 task_work_run+0x24f/0x310 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:939 do_group_exit+0x207/0x2c0 kernel/exit.c:1088 __do_sys_exit_group kernel/exit.c:1099 [inline] __se_sys_exit_group kernel/exit.c:1097 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1097 x64_sys_call+0x2634/0x2640 arch/x86/include/generated/asm/syscalls_64.h:232 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: 0033:0x7f476357e719 RSP: 002b:00007ffc40ae4138 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f476357e719 RDX: 00007f4763535a47 RSI: 0000000000000000 RDI: 000000000000000b RBP: 00007f4763736214 R08: 00007ffc40ae45c7 R09: 000000000000000b R10: 00007f4763735f80 R11: 0000000000000246 R12: 0000000000000003 R13: 00007f4763736208 R14: 0000000000000003 R15: 00000000000014fc rcu: rcu_preempt kthread starved for 10519 jiffies! g12001 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:24912 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x1895/0x4b30 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6774 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Not tainted 6.12.0-rc2-syzkaller-00631-g6d858708d465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:fib6_check_expired include/net/ip6_fib.h:270 [inline] RIP: 0010:__find_rr_leaf+0x195/0x8e0 net/ipv6/route.c:806 Code: 00 e8 ff ff 28 f7 eb 05 e8 f8 ff 28 f7 49 8d 5c 24 64 49 89 dd 49 c1 ed 03 43 0f b6 44 3d 00 84 c0 0f 85 3e 04 00 00 44 8b 33 <44> 89 f6 81 e6 00 00 40 00 31 ff e8 0b 04 29 f7 44 89 f0 25 00 00 RSP: 0018:ffffc900001e6e20 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8880306d1864 RCX: ffff88801d2e8000 RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000100 RBP: ffffc900001e6f98 R08: ffffffff8a6be743 R09: ffffc900001e70d0 R10: ffffc900001e70c0 R11: fffff5200003cde6 R12: ffff8880306d1800 R13: 1ffff110060da30c R14: 0000000000000001 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9802888dfd CR3: 000000000e734000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: find_rr_leaf net/ipv6/route.c:853 [inline] rt6_select net/ipv6/route.c:897 [inline] fib6_table_lookup+0x413/0xbb0 net/ipv6/route.c:2195 ip6_pol_route+0x273/0x15d0 net/ipv6/route.c:2231 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x58c/0x790 net/ipv6/fib6_rules.c:117 ip6_route_input_lookup net/ipv6/route.c:2300 [inline] ip6_route_input+0x859/0xd90 net/ipv6/route.c:2596 ip6_rcv_finish+0x144/0x180 net/ipv6/ip6_input.c:77 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5668 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5781 process_backlog+0x662/0x15b0 net/core/dev.c:6113 __napi_poll+0xcb/0x490 net/core/dev.c:6834 napi_poll net/core/dev.c:6903 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7025 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:927 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 net_ratelimit: 42850 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 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:16:a8:47:5c:ad:21, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, 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:16:a8:47:5c:ad:21, 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:16:a8:47:5c:ad:21, vlan:0) net_ratelimit: 50636 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, 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:16:a8:47:5c:ad:21, 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:16:a8:47:5c:ad:21, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:16:a8:47:5c:ad:21, vlan:0)