bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5828/1:b..l rcu: (detected by 0, t=10503 jiffies, g=26445, q=731 ncpus=2) task:syz-executor state:R running task stack:19952 pid:5828 tgid:5828 ppid:1 flags:0x00004006 Call Trace: <TASK> 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:stack_trace_consume_entry+0x111/0x280 kernel/stacktrace.c:93 Code: 8d 1c c3 48 89 d8 48 c1 e8 03 80 3c 10 00 74 1a 4d 89 cf 48 89 df 49 89 d6 49 89 f5 e8 e8 22 7f 00 4d 89 f9 4c 89 ee 4c 89 f2 <48> 89 33 41 8b 19 41 0f b6 04 14 84 c0 0f 85 34 01 00 00 3b 5d 00 RSP: 0018:ffffc900039574d0 EFLAGS: 00000246 RAX: 1ffff9200072aedf RBX: ffffc900039576f8 RCX: ffffffff9179f000 RDX: dffffc0000000000 RSI: ffffffff821d02cc RDI: ffffc9000395760c RBP: ffffc90003957608 R08: 0000000000000003 R09: ffffc90003957610 R10: ffffc90003957570 R11: ffffffff818b36f0 R12: 1ffff9200072aec1 R13: 1ffff9200072aec1 R14: 0000000000000004 R15: 1ffff9200072aec2 arch_stack_walk+0x10e/0x150 arch/x86/kernel/stacktrace.c:27 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+0xdef/0x1130 mm/page_alloc.c:2657 vfree+0x186/0x2e0 mm/vmalloc.c:3382 kcov_put kernel/kcov.c:439 [inline] kcov_close+0x28/0x50 kernel/kcov.c:535 __fput+0x23c/0xa50 fs/file_table.c:450 task_work_run+0x24f/0x310 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 get_signal+0x16b2/0x1750 kernel/signal.c:3017 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff411381c5a RSP: 002b:00007fff85631b38 EFLAGS: 00000216 ORIG_RAX: 0000000000000037 RAX: 0000000000000000 RBX: 00007fff85631bc0 RCX: 00007ff411381c5a RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007fff85631b5c R09: 00007fff85631f77 R10: 00007fff85631bc0 R11: 0000000000000216 R12: 00007ff411517e40 R13: 00007fff85631b5c R14: 0000000000000000 R15: 00007ff41151a000 </TASK> rcu: rcu_preempt kthread starved for 1811 jiffies! g26445 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: <TASK> 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 </TASK> 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: 5997 Comm: kworker/u8:13 Not tainted 6.13.0-rc1-syzkaller-00371-g65fb414c93f4 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_unbound nsim_dev_trap_report_work RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline] RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline] RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline] RIP: 0010:has_expired net/bridge/br_fdb.c:72 [inline] RIP: 0010:fdb_to_nud+0xee/0x220 net/bridge/br_fdb.c:83 Code: f7 48 83 e5 02 0f 85 13 01 00 00 48 89 df be 08 00 00 00 e8 84 4a 71 f7 43 80 3c 2c 00 74 08 48 89 df e8 05 48 71 f7 48 8b 1b <48> 89 de 48 83 e6 10 31 ff e8 04 65 06 f7 48 83 e3 10 0f 85 e3 00 RSP: 0018:ffffc90000a17e08 EFLAGS: 00000246 RAX: 0000000000000101 RBX: 0000000000000200 RCX: ffffffff8a9911dc RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888020f824a8 RBP: 0000000000000000 R08: ffff888020f824af R09: 1ffff110041f0495 R10: dffffc0000000000 R11: ffffed10041f0496 R12: 1ffff110041f0495 R13: dffffc0000000000 R14: ffff888035964d80 R15: ffff888020f82480 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe69ce3d68 CR3: 0000000064db8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <IRQ> fdb_fill_info+0x30a/0xe50 net/bridge/br_fdb.c:111 fdb_notify+0xc8/0x170 net/bridge/br_fdb.c:192 br_fdb_update+0x55d/0x740 net/bridge/br_fdb.c:934 br_handle_frame_finish+0x739/0x1fe0 net/bridge/br_input.c:141 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: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:6883 napi_poll net/core/dev.c:6952 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:7074 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 </IRQ> <TASK> __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 spin_unlock_bh include/linux/spinlock.h:396 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:820 [inline] nsim_dev_trap_report_work+0x7c4/0xb50 drivers/net/netdevsim/dev.c:851 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 </TASK> 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:e6:90:2d:15:5a:fa, vlan:0) net_ratelimit: 3182 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:e6:90:2d:15:5a:fa, 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:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, 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:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, vlan:0) net_ratelimit: 4361 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:e6:90:2d:15:5a:fa, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, 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:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e6:90:2d:15:5a:fa, vlan:0)