bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:13:c5:89:db:1e, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5751/2:b..l P5137/1:b..l P42/1:b..l rcu: (detected by 0, t=10503 jiffies, g=9017, q=337 ncpus=2) task:kworker/u4:2 state:R running task stack:25400 pid:42 ppid:2 flags:0x00004000 Workqueue: 0x0 (events_unbound) Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1553/0x45a0 kernel/sched/core.c:6700 preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010 irqentry_exit+0x67/0x70 kernel/entry/common.c:438 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:page_ext_data include/linux/page_ext.h:87 [inline] RIP: 0010:get_page_owner mm/page_owner.c:107 [inline] RIP: 0010:__reset_page_owner+0xbc/0x190 mm/page_owner.c:152 Code: 8c 00 00 00 e8 75 97 9e ff 41 83 ee 01 0f 82 ba 00 00 00 e8 66 97 9e ff 4c 89 ff be 08 00 00 00 e8 19 d0 f6 ff 49 0f ba 37 01 <4c> 8b 2d dd e1 3b 0b 4b 8d 7c 2f 0c 48 89 f8 48 c1 e8 03 42 0f b6 RSP: 0018:ffffc90000b2f610 EFLAGS: 00000257 RAX: ffffffff81e88a01 RBX: 1ffffffff2e66b30 RCX: ffffffff81e88a77 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801bd8ef88 RBP: 0000000000000002 R08: ffff88801bd8ef8f R09: 1ffff110037b1df1 R10: dffffc0000000000 R11: ffffed10037b1df2 R12: dffffc0000000000 R13: ffff88801bd8ef60 R14: 0000000000000002 R15: ffff88801bd8ef88 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1181 [inline] free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x319/0x400 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] __kmem_cache_alloc_node+0x13a/0x250 mm/slub.c:3534 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc_node_track_caller+0xa2/0x230 mm/slab_common.c:1027 kvasprintf+0xec/0x1a0 lib/kasprintf.c:25 __kthread_create_on_node+0x1d0/0x3f0 kernel/kthread.c:444 kthread_create_on_node+0xec/0x140 kernel/kthread.c:512 create_worker+0x37c/0x7d0 kernel/workqueue.c:2213 maybe_create_worker kernel/workqueue.c:2482 [inline] manage_workers kernel/workqueue.c:2534 [inline] worker_thread+0x4d9/0xfc0 kernel/workqueue.c:2786 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 task:udevd state:R running task stack:24168 pid:5137 ppid:1 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1553/0x45a0 kernel/sched/core.c:6700 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45 unwind_next_frame+0x200f/0x2970 arch/x86/kernel/unwind_orc.c:672 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122 save_stack+0x125/0x230 mm/page_owner.c:128 __reset_page_owner+0x4e/0x190 mm/page_owner.c:149 reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1181 [inline] free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x319/0x400 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 ____kasan_kmalloc mm/kasan/common.c:341 [inline] __kasan_kmalloc+0x22/0xa0 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc+0xb4/0x230 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x28b/0x540 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x592/0x5d0 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x282/0x560 security/tomoyo/file.c:822 security_inode_getattr+0xd3/0x120 security/security.c:2154 vfs_getattr fs/stat.c:173 [inline] vfs_statx+0x172/0x680 fs/stat.c:248 vfs_fstatat+0x12a/0x1b0 fs/stat.c:299 __do_sys_newfstatat fs/stat.c:463 [inline] __se_sys_newfstatat fs/stat.c:457 [inline] __x64_sys_newfstatat+0x149/0x1f0 fs/stat.c:457 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fdbbb711b0a RSP: 002b:00007ffd540877c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 00005640e69a4410 RCX: 00007fdbbb711b0a RDX: 00007ffd540877d0 RSI: 00005640e69922a8 RDI: 00000000ffffff9c RBP: 00005641165fd148 R08: 00063478c1c69200 R09: 0000000000745b1d R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd540877d0 R14: 0000000000000000 R15: 00063478c1c69200 task:syz-executor state:R running task stack:21936 pid:5751 ppid:5750 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1553/0x45a0 kernel/sched/core.c:6700 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45 __local_bh_enable_ip+0x14b/0x1c0 kernel/softirq.c:413 spin_unlock_bh include/linux/spinlock.h:396 [inline] nf_conntrack_tcp_packet+0x2dfe/0x5880 net/netfilter/nf_conntrack_proto_tcp.c:1293 nf_conntrack_handle_packet net/netfilter/nf_conntrack_core.c:1937 [inline] nf_conntrack_in+0x856/0x15c0 net/netfilter/nf_conntrack_core.c:2027 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline] nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626 nf_hook+0x228/0x390 include/linux/netfilter.h:259 __ip_local_out+0x4db/0x5f0 net/ipv4/ip_output.c:118 ip_local_out net/ipv4/ip_output.c:127 [inline] __ip_queue_xmit+0xf7c/0x1950 net/ipv4/ip_output.c:540 __tcp_transmit_skb+0x1d6b/0x33f0 net/ipv4/tcp_output.c:1425 tcp_transmit_skb net/ipv4/tcp_output.c:1443 [inline] tcp_write_xmit+0x174c/0x62e0 net/ipv4/tcp_output.c:2781 tcp_sendmsg_locked+0x293b/0x4bd0 net/ipv4/tcp.c:1296 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1348 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x2df/0x420 net/socket.c:1160 call_write_iter include/linux/fs.h:2018 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x46c/0x990 fs/read_write.c:584 ksys_write+0x150/0x260 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fda1a157997 RSP: 002b:00007fffc149f700 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000555571c29500 RCX: 00007fda1a157997 RDX: 0000000000013798 RSI: 00007fda141ec868 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000013798 R13: 0000555571c3df10 R14: 00007fffc149fca0 R15: 00007fda141ec868 rcu: rcu_preempt kthread starved for 598 jiffies! g9017 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:27720 pid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x1553/0x45a0 kernel/sched/core.c:6700 schedule+0xbd/0x170 kernel/sched/core.c:6774 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168 rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 6151 Comm: syz.3.132 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:__in6_dev_get include/net/addrconf.h:323 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:414 [inline] RIP: 0010:find_match+0xb5/0xc80 net/ipv6/route.c:782 Code: df e8 8f 7f 9f f8 48 89 d8 bb 48 03 00 00 48 03 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 6e 7f 9f f8 48 8b 1b 16 52 46 01 41 89 c4 31 ff 89 c6 e8 2a 4c 47 f8 45 85 e4 74 1a RSP: 0018:ffffc900001ef780 EFLAGS: 00000246 RAX: 1ffff1100f4fd069 RBX: ffff888031a76000 RCX: 0000000000000100 RDX: ffff88802969bc00 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff1100b8c3c17 R08: ffffc900001efa80 R09: ffffc900001efa90 R10: ffffc900001ef8e0 R11: fffff5200003df1e R12: dffffc0000000000 R13: 0000000000000003 R14: 1ffff1100b8c3c19 R15: ffff88805c61e0cf FS: 00007fbe6bf1e6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f898e94da08 CR3: 000000002652f000 CR4: 00000000003506e0 Call Trace: __find_rr_leaf+0x249/0x760 net/ipv6/route.c:870 find_rr_leaf net/ipv6/route.c:891 [inline] rt6_select net/ipv6/route.c:935 [inline] fib6_table_lookup+0x3b5/0xa80 net/ipv6/route.c:2232 ip6_pol_route+0x239/0x1230 net/ipv6/route.c:2268 pol_lookup_func include/net/ip6_fib.h:641 [inline] fib6_rule_lookup+0x20c/0x570 net/ipv6/fib6_rules.c:116 ip6_route_input_lookup net/ipv6/route.c:2337 [inline] ip6_route_input+0x732/0xa50 net/ipv6/route.c:2633 ip6_rcv_finish+0x143/0x230 net/ipv6/ip6_input.c:77 ip_sabotage_in+0x1f4/0x280 net/bridge/br_netfilter_hooks.c:1001 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline] nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:259 [inline] NF_HOOK+0x21d/0x3b0 include/linux/netfilter.h:302 __netif_receive_skb_one_core net/core/dev.c:5634 [inline] __netif_receive_skb+0xcc/0x290 net/core/dev.c:5748 netif_receive_skb_internal net/core/dev.c:5834 [inline] netif_receive_skb+0x1bc/0x720 net/core/dev.c:5893 NF_HOOK+0x9e/0x3a0 include/linux/netfilter.h:304 br_handle_frame_finish+0x13e5/0x18f0 net/bridge/br_input.c:221 br_nf_hook_thresh+0x3cd/0x4a0 net/bridge/br_netfilter_hooks.c:1184 br_nf_pre_routing_finish_ipv6+0x9dc/0xd00 net/bridge/br_netfilter_ipv6.c:-1 NF_HOOK include/linux/netfilter.h:304 [inline] br_nf_pre_routing_ipv6+0x349/0x6b0 net/bridge/br_netfilter_ipv6.c:184 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline] nf_hook_bridge_pre net/bridge/br_input.c:277 [inline] br_handle_frame+0x1245/0x14d0 net/bridge/br_input.c:424 __netif_receive_skb_core+0xfab/0x3af0 net/core/dev.c:5528 __netif_receive_skb_one_core net/core/dev.c:5632 [inline] __netif_receive_skb+0x74/0x290 net/core/dev.c:5748 process_backlog+0x391/0x6f0 net/core/dev.c:6076 __napi_poll+0xc0/0x460 net/core/dev.c:6638 napi_poll net/core/dev.c:6705 [inline] net_rx_action+0x616/0xc40 net/core/dev.c:6841 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:__sanitizer_cov_trace_pc+0x45/0x60 kernel/kcov.c:221 Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 RSP: 0018:ffffc9000bc16f80 EFLAGS: 00000246 RAX: ffffffff813c9de1 RBX: ffff88805b7c9a00 RCX: ffff88802969bc00 RDX: ffffc9000d549000 RSI: 0000000000010aa3 RDI: ffff88805b7c9a00 RBP: ffff88805b7c9a00 R08: ffff8880b8f41ec3 R09: 1ffff110171e83d8 R10: dffffc0000000000 R11: ffffed10171e83d9 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88805b7c9a00 __phys_addr+0x11/0x170 arch/x86/mm/physaddr.c:16 virt_to_folio include/linux/mm.h:1289 [inline] virt_to_slab mm/slab.h:218 [inline] qlink_to_cache+0x5/0xa0 mm/kasan/quarantine.c:129 qlist_free_all+0x39/0xd0 mm/kasan/quarantine.c:182 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 ____kasan_kmalloc mm/kasan/common.c:341 [inline] __kasan_kmalloc+0x22/0xa0 mm/kasan/common.c:384 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc+0xb4/0x230 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] fib_nl2rule+0x334/0x1b70 net/core/fib_rules.c:544 fib_nl_delrule+0x348/0x1da0 net/core/fib_rules.c:912 rtnetlink_rcv_msg+0x869/0xfa0 net/core/rtnetlink.c:6475 netlink_rcv_skb+0x241/0x4d0 net/netlink/af_netlink.c:2545 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x751/0x8d0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x2df/0x420 net/socket.c:1160 call_write_iter include/linux/fs.h:2018 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x46c/0x990 fs/read_write.c:584 ksys_write+0x150/0x260 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fbe6af9c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbe6bf1e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fbe6b215fa0 RCX: 00007fbe6af9c819 RDX: 0000000000033fe0 RSI: 0000200000000000 RDI: 000000000000000b RBP: 00007fbe6b032c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbe6b216038 R14: 00007fbe6b215fa0 R15: 00007ffdc0e878f8 net_ratelimit: 9025 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:6e:13:c5:89:db:1e, 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:6e:13:c5:89:db:1e, 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:6e:13:c5:89:db:1e, 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:6e:13:c5:89:db:1e, 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:6e:13:c5:89:db:1e, vlan:0) net_ratelimit: 17413 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:6e:13:c5:89:db:1e, 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:6e:13:c5:89:db:1e, 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:6e:13:c5:89:db:1e, 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:6e:13:c5:89:db:1e, 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:6e:13:c5:89:db:1e, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)