bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:7e:93:48:38:d6, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=19085, q=720 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294971138-4294960635), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10504 jiffies! g19085 f0x2 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: CPU: 1 UID: 0 PID: 5207 Comm: udevd Not tainted 6.13.0-rc2-syzkaller-00131-g429fde2d81bc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data kernel/kcov.c:246 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x2d/0x90 kernel/kcov.c:314 Code: fa 4c 8b 04 24 65 48 8b 14 25 00 d6 03 00 65 8b 05 70 73 64 7e 25 00 01 ff 00 74 10 3d 00 01 00 00 75 5b 83 ba 1c 16 00 00 00 <74> 52 8b 82 f8 15 00 00 83 f8 03 75 47 48 8b 8a 00 16 00 00 44 8b RSP: 0018:ffffc90000a181d8 EFLAGS: 00000246 RAX: 0000000000000100 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88807d8eda00 RSI: 0000000000000000 RDI: 0000000000000006 RBP: ffffc90000a18318 R08: ffffffff8a9bce86 R09: 0000000000000000 R10: ffffc90000a18260 R11: fffff52000143052 R12: ffff88804fee2500 R13: 0000000000000000 R14: 1ffff92000143048 R15: 0000000000000000 FS: 00007f19df4c1c80(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556dc2c808 CR3: 000000007cdec000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: br_nf_hook_thresh+0xb6/0x590 net/bridge/br_netfilter_hooks.c:1169 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:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__phys_addr+0x4b/0x170 arch/x86/mm/physaddr.c:28 Code: 52 00 4c 89 f3 48 81 eb 00 00 00 80 0f 83 94 00 00 00 48 b8 00 00 00 00 80 77 00 00 49 01 c6 4c 89 f7 48 89 de e8 c5 30 52 00 <49> 39 de 0f 87 00 01 00 00 48 c7 c0 21 4e 19 90 48 c1 e8 03 48 b9 RSP: 0018:ffffc90003aaf750 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880cfee8dc0 RCX: ffff88807d8eda00 RDX: 0000000000000000 RSI: ffff8880cfee8dc0 RDI: 000000004fee8dc0 RBP: 0000000000000000 R08: ffffffff814d2fdb R09: ffffffff8205d03f R10: dffffc0000000000 R11: fffffbfff2853f17 R12: ffff88804fee8dc0 R13: ffffea0000000000 R14: 000000004fee8dc0 R15: 0000000000000000 virt_to_folio include/linux/mm.h:1294 [inline] virt_to_slab mm/slab.h:211 [inline] qlink_to_cache mm/kasan/quarantine.c:131 [inline] qlist_free_all+0x3d/0x140 mm/kasan/quarantine.c:176 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_noprof+0x1d9/0x380 mm/slub.c:4160 vma_lock_alloc kernel/fork.c:446 [inline] vm_area_dup+0x61/0x290 kernel/fork.c:499 dup_mmap kernel/fork.c:697 [inline] dup_mm kernel/fork.c:1695 [inline] copy_mm+0xc1d/0x1f90 kernel/fork.c:1744 copy_process+0x1845/0x3d50 kernel/fork.c:2395 kernel_clone+0x226/0x8e0 kernel/fork.c:2807 __do_sys_clone kernel/fork.c:2950 [inline] __se_sys_clone kernel/fork.c:2934 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2934 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: 0033:0x7f19df0fca12 Code: 41 5d 41 5e 41 5f c3 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 10 48 8b 15 e7 43 0f 00 f7 d8 64 89 02 48 83 RSP: 002b:00007fffc37dc988 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 000055d8b56a9c01 RCX: 00007f19df0fca12 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000005 R08: 0000000000000000 R09: 000055d8b568b910 R10: 00007f19df4c1f50 R11: 0000000000000246 R12: 000055d8b5692620 R13: 0000000000000000 R14: 0000000000000000 R15: 000055d8b568b910 net_ratelimit: 19591 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:7e:93:48:38:d6, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:7e:93:48:38:d6, 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:26:7e:93:48:38:d6, 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:26:7e:93:48:38:d6, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:7e:93:48:38:d6, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:26:7e:93:48:38:d6, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)