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:56:9e:5c:0e:df:fd, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6407/1:b..l rcu: (detected by 1, t=10502 jiffies, g=16697, q=888 ncpus=1) task:syz.2.102 state:R running task stack:27320 pid:6407 tgid:6405 ppid:5841 task_flags:0x400140 flags:0x00080001 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6929 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256 irqentry_exit+0x36/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:217 [inline] RIP: 0010:unwind_next_frame+0x1f6/0x20a0 arch/x86/kernel/unwind_orc.c:494 Code: 89 c3 39 d0 0f 83 fb 15 00 00 48 ba 00 00 00 00 00 fc ff df 89 c1 48 8d 3c 8d 7c b8 d2 91 49 89 f8 49 c1 e8 03 45 0f b6 04 10 <48> 89 fa 83 e2 07 83 c2 03 44 38 c2 7c 2f 45 84 c0 74 2a 48 89 4c RSP: 0018:ffffc9000e376f78 EFLAGS: 00000a03 RAX: 00000000000062ce RBX: 0000000000000001 RCX: 00000000000062ce RDX: dffffc0000000000 RSI: 00000000000a66c9 RDI: ffffffff91d443b4 RBP: ffffc9000e377080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 00000000000062ce R12: ffffc9000e377088 R13: ffffc9000e377038 R14: ffffc9000e37706d R15: ffffffff8162ceb2 __unwind_start+0x45f/0x7f0 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0x73/0x100 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x160/0x1f0 mm/page_owner.c:156 __set_page_owner+0x91/0x550 mm/page_owner.c:329 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416 folio_alloc_mpol_noprof+0x36/0x2f0 mm/mempolicy.c:2435 vma_alloc_folio_noprof+0xed/0x1e0 mm/mempolicy.c:2470 folio_prealloc mm/memory.c:1189 [inline] alloc_anon_folio mm/memory.c:5125 [inline] do_anonymous_page mm/memory.c:5182 [inline] do_pte_missing+0x2202/0x3ba0 mm/memory.c:4359 handle_pte_fault mm/memory.c:6177 [inline] __handle_mm_fault+0x1556/0x2aa0 mm/memory.c:6318 handle_mm_fault+0x589/0xd10 mm/memory.c:6487 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x54e/0x3530 mm/gup.c:1428 populate_vma_page_range+0x267/0x3f0 mm/gup.c:1860 __mm_populate+0x1d8/0x380 mm/gup.c:1963 mm_populate include/linux/mm.h:3471 [inline] vm_mmap_pgoff+0x37f/0x470 mm/util.c:586 ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:604 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa57598eec9 RSP: 002b:00007fa57680b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fa575be5fa0 RCX: 00007fa57598eec9 RDX: 00000000000000df RSI: 0000000000400008 RDI: 0000000000000000 RBP: 00007fa575a11f91 R08: 0000000000000002 R09: 0000040000008000 R10: 0000000000009b72 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa575be6038 R14: 00007fa575be5fa0 R15: 00007ffe17166378 rcu: rcu_preempt kthread starved for 2041 jiffies! g16697 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:28376 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5325 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6929 __schedule_loop kernel/sched/core.c:7011 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7026 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 0 PID: 3391 Comm: kworker/R-krxrp Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: krxrpcd rxrpc_peer_keepalive_worker RIP: 0010:local_lock_release include/linux/local_lock_internal.h:55 [inline] RIP: 0010:process_backlog+0x6d1/0x15e0 net/core/dev.c:6553 Code: c0 03 38 d0 7c 08 84 d2 0f 85 d3 0d 00 00 8b 05 55 d5 7a 11 31 ff 4d 8d 74 24 28 89 c6 89 44 24 18 e8 23 18 84 f8 8b 44 24 18 <85> c0 0f 84 98 06 00 00 e8 d2 1c 84 f8 4c 89 f2 48 b8 00 00 00 00 RSP: 0018:ffffc90000a08ca8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffffff89388b7d RDX: ffff888031093c80 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8880b853bf10 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880b853bf68 R13: ffff8880b853c108 R14: ffff8880b853bf90 R15: ffffffff9ab360c0 FS: 0000000000000000(0000) GS:ffff888124ae1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a7d1fa0a38 CR3: 000000000e182000 CR4: 00000000003526f0 Call Trace: __napi_poll.constprop.0+0xba/0x550 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x97f/0xef0 net/core/dev.c:7784 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622 do_softirq kernel/softirq.c:523 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:510 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:450 spin_unlock_bh include/linux/spinlock.h:396 [inline] rxrpc_peer_keepalive_dispatch net/rxrpc/peer_event.c:295 [inline] rxrpc_peer_keepalive_worker+0xa54/0xef0 net/rxrpc/peer_event.c:341 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] rescuer_thread+0x620/0xea0 kernel/workqueue.c:3523 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 net_ratelimit: 10112 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:9e:5c:0e:df:fd, 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 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) 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 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) 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) bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:9e:5c:0e:df:fd, vlan:0) net_ratelimit: 8780 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:56:9e:5c:0e:df:fd, 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 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) 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 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:56:9e:5c:0e:df:fd, 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 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)