bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5828/2:b..l rcu: (detected by 0, t=10503 jiffies, g=60201, q=343 ncpus=2) task:syz-executor state:R running task stack:20480 pid:5828 tgid:5828 ppid:5825 flags:0x00004002 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:rcu_is_watching+0x70/0xb0 kernel/rcu/tree.c:739 Code: c3 d8 7c 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 22 8b 03 65 ff 0d 61 b6 7e 7e 74 10 83 e0 04 c1 e8 02 5b <41> 5e 41 5f c3 cc cc cc cc e8 12 38 85 ff eb e9 89 d9 80 e1 07 80 RSP: 0018:ffffc9000392f630 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff88802fdf3c00 RDX: ffff88802fdf3c00 RSI: ffffffff8c5fb080 RDI: ffffffff8c5fb040 RBP: 0000000000000000 R08: ffffffff81ae94a4 R09: 1ffffffff2858110 R10: dffffc0000000000 R11: fffffbfff2858111 R12: ffffffffa0000954 R13: dffffc0000000000 R14: ffffffff8e2f2b58 R15: dffffc0000000000 rcu_read_unlock include/linux/rcupdate.h:878 [inline] is_bpf_text_address+0x1fd/0x2a0 kernel/bpf/core.c:774 kernel_text_address+0xa7/0xe0 kernel/extable.c:125 __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:1127 [inline] free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2659 __slab_free+0x2c2/0x380 mm/slub.c:4524 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:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_noprof+0x285/0x4c0 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] kmalloc_array_noprof include/linux/slab.h:946 [inline] security_inode_init_security+0x126/0x480 security/security.c:1824 shmem_mknod+0x1ff/0x3d0 mm/shmem.c:3680 shmem_mkdir+0x33/0x70 mm/shmem.c:3739 vfs_mkdir+0x2f9/0x4f0 fs/namei.c:4311 do_mkdirat+0x264/0x3a0 fs/namei.c:4334 __do_sys_mkdirat fs/namei.c:4349 [inline] __se_sys_mkdirat fs/namei.c:4347 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4347 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: 0033:0x7f47c0584597 RSP: 002b:00007ffff36148b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007ffff3614900 RCX: 00007f47c0584597 RDX: 00000000000001ff RSI: 00007ffff3614900 RDI: 00000000ffffff9c RBP: 00007ffff36148ec R08: 0000000000000005 R09: 00007ffff3614655 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000060 R13: 000000000004ade7 R14: 00007ffff3614940 R15: 00000000000001a8 rcu: rcu_preempt kthread starved for 7499 jiffies! g60201 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:26264 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: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 9018 Comm: kworker/1:5 Not tainted 6.13.0-rc6-syzkaller-01065-g7a1723d3b230 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: events_power_efficient neigh_periodic_work RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:99 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x6f6/0x22d0 arch/x86/kernel/unwind_orc.c:494 Code: 00 00 fc ff df 0f b6 04 08 84 c0 75 27 48 63 03 48 01 d8 48 8d 4b 04 4c 39 f8 4c 0f 46 f1 48 8d 43 fc 48 0f 47 e8 4c 0f 46 e3 <49> 39 ee 76 a9 e9 55 fb ff ff 89 d9 80 e1 07 80 c1 03 38 c1 7c cd RSP: 0018:ffffc90000a16830 EFLAGS: 00000297 RAX: ffffffff9029e42c RBX: ffffffff9029e430 RCX: ffffffff9029e434 RDX: 00000000000b0001 RSI: ffffffff909eed02 RDI: 0000000000000001 RBP: ffffffff9029e430 R08: 0000000000000015 R09: ffffc90000a169f0 R10: ffffc90000a16950 R11: ffffffff818b4a10 R12: ffffffff9029e430 R13: ffffffff9029e3f8 R14: ffffffff9029e434 R15: ffffffff8109f679 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc03160e1a0 CR3: 0000000032fac000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4715 skb_ext_reset include/linux/skbuff.h:4928 [inline] skb_scrub_packet+0x304/0x440 net/core/skbuff.c:6118 ____dev_forward_skb include/linux/netdevice.h:4146 [inline] __dev_forward_skb2+0x273/0x720 net/core/dev.c:2232 veth_forward_skb drivers/net/veth.c:320 [inline] veth_xmit+0x453/0xad0 drivers/net/veth.c:375 __netdev_start_xmit include/linux/netdevice.h:5050 [inline] netdev_start_xmit include/linux/netdevice.h:5059 [inline] xmit_one net/core/dev.c:3635 [inline] dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3651 __dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4481 dev_queue_xmit include/linux/netdevice.h:3212 [inline] vlan_dev_hard_start_xmit+0x36c/0x5f0 net/8021q/vlan_dev.c:125 __netdev_start_xmit include/linux/netdevice.h:5050 [inline] netdev_start_xmit include/linux/netdevice.h:5059 [inline] xmit_one net/core/dev.c:3635 [inline] dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3651 __dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4481 dev_queue_xmit include/linux/netdevice.h:3212 [inline] br_dev_queue_push_xmit+0x726/0x900 net/bridge/br_forward.c:53 NF_HOOK+0x700/0x7c0 include/linux/netfilter.h:314 br_nf_post_routing+0xa20/0xe80 net/bridge/br_netfilter_hooks.c:997 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x2a7/0x460 include/linux/netfilter.h:312 br_forward_finish+0xd8/0x130 net/bridge/br_forward.c:66 br_nf_forward_finish+0xb49/0xfb0 net/bridge/br_netfilter_hooks.c:693 NF_HOOK+0x700/0x7c0 include/linux/netfilter.h:314 br_nf_forward_ip+0x61e/0x7b0 net/bridge/br_netfilter_hooks.c:747 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x2a7/0x460 include/linux/netfilter.h:312 __br_forward+0x489/0x660 net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver+0xb3/0x150 net/bridge/br_forward.c:190 br_flood+0x2e4/0x680 net/bridge/br_forward.c:237 br_handle_frame_finish+0x18d2/0x2000 net/bridge/br_input.c:220 br_nf_hook_thresh+0x472/0x590 br_nf_pre_routing_finish_ipv6+0xaa0/0xdd0 NF_HOOK include/linux/netfilter.h:314 [inline] br_nf_pre_routing_ipv6+0x379/0x770 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:282 [inline] br_handle_frame+0x9f3/0x1530 net/bridge/br_input.c:433 __netif_receive_skb_core+0x13e7/0x4540 net/core/dev.c:5619 __netif_receive_skb_one_core net/core/dev.c:5723 [inline] __netif_receive_skb+0x12f/0x650 net/core/dev.c:5838 process_backlog+0x662/0x15b0 net/core/dev.c:6170 __napi_poll+0xcb/0x490 net/core/dev.c:6953 napi_poll net/core/dev.c:7022 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7144 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 do_softirq+0x11b/0x1e0 kernel/softirq.c:462 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:389 neigh_periodic_work+0xbcb/0xde0 net/core/neighbour.c:968 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 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: 20566 callbacks suppressed bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan4 with own address as source address (addr:aa:aa:aa:aa:aa:19, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan4 with own address as source address (addr:aa:aa:aa:aa:aa:19, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan4 with own address as source address (addr:aa:aa:aa:aa:aa:19, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan4 with own address as source address (addr:aa:aa:aa:aa:aa:19, vlan:0) net_ratelimit: 25832 callbacks suppressed bridge0: received packet on vlan4 with own address as source address (addr:aa:aa:aa:aa:aa:19, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan4 with own address as source address (addr:aa:aa:aa:aa:aa:19, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan4 with own address as source address (addr:aa:aa:aa:aa:aa:19, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0) bridge0: received packet on vlan4 with own address as source address (addr:aa:aa:aa:aa:aa:19, vlan:0) bridge0: received packet on vlan3 with own address as source address (addr:aa:aa:aa:aa:aa:18, vlan:0)