bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5982/1:b..l rcu: (detected by 0, t=10503 jiffies, g=8461, q=187 ncpus=2) task:syz.3.14 state:R running task stack:19856 pid:5982 tgid:5981 ppid:5858 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078 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:rol32 include/linux/bitops.h:127 [inline] RIP: 0010:jhash2 include/linux/jhash.h:139 [inline] RIP: 0010:hash_stack lib/stackdepot.c:514 [inline] RIP: 0010:stack_depot_save_flags+0x106/0x830 lib/stackdepot.c:614 Code: f0 44 89 f3 83 fe 01 74 11 83 fe 02 74 09 83 fe 03 75 4e 44 03 72 08 03 5a 04 03 02 41 31 de 89 d9 c1 c1 0e 41 29 ce 44 31 f0 <44> 89 f1 c1 c1 0b 29 c8 89 c1 c1 c1 19 31 c3 29 cb 41 31 de 89 d9 RSP: 0018:ffffc9000456e640 EFLAGS: 00000206 RAX: 00000000785fdfe1 RBX: 0000000020b321d2 RCX: 00000000c874882c RDX: ffffc9000456e758 RSI: 0000000000000002 RDI: 0000000051047eee RBP: 00000000bff5d9c4 R08: ffffc9000456e6e0 R09: 0000000000000010 R10: ffffc9000456e570 R11: ffffffff8181a6f0 R12: dffffc0000000000 R13: 1ffff920008adcd8 R14: 000000005bb94785 R15: 1ffff11005f6a830 save_stack+0x109/0x1f0 mm/page_owner.c:157 __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:1127 [inline] free_unref_page+0xdf9/0x1140 mm/page_alloc.c:2657 discard_slab mm/slub.c:2673 [inline] __put_partials+0xeb/0x130 mm/slub.c:3142 put_cpu_partial+0x17c/0x250 mm/slub.c:3217 __slab_free+0x2ea/0x3d0 mm/slub.c:4468 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_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4205 kmalloc_reserve+0xa8/0x2a0 net/core/skbuff.c:587 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1323 [inline] nlmsg_new include/net/netlink.h:1018 [inline] inet_netconf_notify_devconf+0x15a/0x220 net/ipv4/devinet.c:2162 __devinet_sysctl_unregister net/ipv4/devinet.c:2657 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2681 [inline] inetdev_destroy net/ipv4/devinet.c:342 [inline] inetdev_event+0x87b/0x1550 net/ipv4/devinet.c:1663 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers net/core/dev.c:2048 [inline] unregister_netdevice_many_notify+0xedd/0x1da0 net/core/dev.c:11520 rtnl_newlink_create+0x835/0xa30 net/core/rtnetlink.c:3808 __rtnl_newlink net/core/rtnetlink.c:3897 [inline] rtnl_newlink+0x17dd/0x24f0 net/core/rtnetlink.c:4007 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6917 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2542 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1347 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:726 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2583 ___sys_sendmsg net/socket.c:2637 [inline] __sys_sendmsg+0x269/0x350 net/socket.c:2669 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: 0033:0x7f1c5897ff19 RSP: 002b:00007f1c597d5058 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1c58b45fa0 RCX: 00007f1c5897ff19 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000005 RBP: 00007f1c589f3986 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1c58b45fa0 R15: 00007ffd207ff148 rcu: rcu_preempt kthread starved for 10572 jiffies! g8461 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 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:25976 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x1850/0x4c30 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99 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: CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.12.0-syzkaller-10687-ga9ab02ed97c6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:preempt_count_add+0x44/0x190 kernel/sched/core.c:5851 Code: 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 ed 00 00 00 83 3d ec b7 de 18 00 75 07 65 8b 05 eb e2 9f 7e 65 01 1d e4 e2 9f 7e <48> c7 c0 c0 a9 42 9a 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 e4 00 RSP: 0018:ffffc90000156bb8 EFLAGS: 00000282 RAX: 0000000080000100 RBX: 0000000000000001 RCX: ffffffff9a42a903 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000001 RBP: ffffc90000156e7c R08: ffff88823fff8a97 R09: 1ffff11047fff152 R10: dffffc0000000000 R11: ffffed1047fff153 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000005199 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555557b075c8 CR3: 000000002fae4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rmqueue_pcplist mm/page_alloc.c:3030 [inline] rmqueue mm/page_alloc.c:3074 [inline] get_page_from_freelist+0x766/0x3790 mm/page_alloc.c:3471 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x140 mm/slub.c:2408 allocate_slab+0x5a/0x2f0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3815 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4160 __skb_ext_alloc net/core/skbuff.c:6924 [inline] skb_ext_add+0x14d/0x910 net/core/skbuff.c:7027 nf_bridge_alloc include/net/netfilter/br_netfilter.h:12 [inline] br_nf_pre_routing_ipv6+0x131/0x770 net/bridge/br_netfilter_ipv6.c:172 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:277 [inline] br_handle_frame+0x9fd/0x1530 net/bridge/br_input.c:424 __netif_receive_skb_core+0x14eb/0x4690 net/core/dev.c:5566 __netif_receive_skb_one_core net/core/dev.c:5670 [inline] __netif_receive_skb+0x12f/0x650 net/core/dev.c:5785 process_backlog+0x662/0x15b0 net/core/dev.c:6117 __napi_poll+0xcb/0x490 net/core/dev.c:6877 napi_poll net/core/dev.c:6946 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7068 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:943 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 bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:83:59:10:d4:3b, vlan:0)