bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10387/2:b..l rcu: (detected by 0, t=10502 jiffies, g=33949, q=777 ncpus=2) task:syz.3.1388 state:R running task stack:25600 pid:10387 tgid:10386 ppid:5815 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7078 irqentry_exit+0x36/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:percpu_ref_tryget_many include/linux/percpu-refcount.h:250 [inline] RIP: 0010:percpu_ref_tryget include/linux/percpu-refcount.h:266 [inline] RIP: 0010:css_tryget include/linux/cgroup_refcnt.h:45 [inline] RIP: 0010:css_tryget include/linux/cgroup_refcnt.h:42 [inline] RIP: 0010:get_mem_cgroup_from_mm+0x2b5/0x5f0 mm/memcontrol.c:948 Code: 5a 85 c0 75 2f 48 8d 7b 10 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 b9 02 00 00 48 8b 43 10 a8 03 0f 85 9c 00 00 00 65 48 ff 00 66 af ff ff e9 6d fe ff ff e8 8c 05 7b ff 84 c0 75 c8 e8 d3 90 RSP: 0018:ffffc9000474f4e0 EFLAGS: 00000202 RAX: 0000607f47625a18 RBX: ffff888077bbe000 RCX: 000000004f0434b8 RDX: 0000000000000000 RSI: ffffffff8bd1d2c0 RDI: ffff888077bbe010 RBP: dffffc0000000000 R08: 0000000000000000 R09: fffffbfff2dc9998 R10: ffffffff96e4ccc7 R11: 0000000000000002 R12: ffff88814570d800 R13: ffff88807c667500 R14: ffffed100f8ccfa1 R15: ffffffff820485f7 __mem_cgroup_charge+0x1a/0x280 mm/memcontrol.c:4511 mem_cgroup_charge include/linux/memcontrol.h:646 [inline] folio_prealloc mm/memory.c:1067 [inline] wp_page_copy mm/memory.c:3367 [inline] do_wp_page+0x146c/0x47c0 mm/memory.c:3759 handle_pte_fault mm/memory.c:5817 [inline] __handle_mm_fault+0x1ade/0x2a40 mm/memory.c:5944 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6112 do_user_addr_fault+0x7a3/0x13f0 arch/x86/mm/fault.c:1389 handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x5c/0xc0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__put_user_nocheck_4+0x7/0x20 arch/x86/lib/putuser.S:97 Code: d9 0f 01 cb 89 01 31 c9 0f 01 ca c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 01 cb <89> 01 31 c9 0f 01 ca c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 RSP: 0018:ffffc9000474f9f8 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000020247030 RDX: 0000000000080000 RSI: ffffffff88fecac4 RDI: 0000000000000005 RBP: ffffc9000474fd98 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000020247000 R14: ffffc9000474fddc R15: 0000000000000002 ____sys_recvmsg+0x2ef/0x6b0 net/socket.c:2816 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845 do_recvmmsg+0x2f8/0x740 net/socket.c:2940 __sys_recvmmsg net/socket.c:3014 [inline] __do_sys_recvmmsg net/socket.c:3037 [inline] __se_sys_recvmmsg net/socket.c:3030 [inline] __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3030 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe752f85d19 RSP: 002b:00007fe753d55038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fe753175fa0 RCX: 00007fe752f85d19 RDX: 00000000000f4240 RSI: 0000000020000a80 RDI: 0000000000000007 RBP: 00007fe753001a20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe753175fa0 R15: 00007fff78cceda8 rcu: rcu_preempt kthread starved for 10070 jiffies! g33949 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 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:28352 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6848 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 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: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.13.0-rc2-syzkaller-00130-g150b567e0d57 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline] RIP: 0010:vprintk_emit+0x621/0x6f0 kernel/printk/printk.c:2431 Code: 85 ed 0f 85 81 00 00 00 e8 dc 4f 20 00 9c 41 5c 41 81 e4 00 02 00 00 31 ff 4c 89 e6 e8 38 52 20 00 4d 85 e4 0f 85 8d 00 00 00 ba 4f 20 00 45 31 c9 41 b8 01 00 00 00 31 c9 48 8d 05 00 00 00 RSP: 0018:ffffc90000157068 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 000000000000006f RCX: ffffffff8179b43e RDX: ffff88801d6b8000 RSI: ffffffff8179b448 RDI: 0000000000000007 RBP: 1ffff9200002ae0f R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000200 R14: ffff88801dada440 R15: ffffc90000157150 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557c3895c8 CR3: 000000002a2ce000 CR4: 00000000003526f0 DR0: 0000000000100000 DR1: 0000000000000005 DR2: 0000000000000005 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:86 _printk+0xc8/0x100 kernel/printk/printk.c:2457 br_fdb_update+0x4b4/0x7c0 net/bridge/br_fdb.c:897 br_handle_frame_finish+0xd77/0x1c80 net/bridge/br_input.c:141 br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1198 br_nf_pre_routing_finish_ipv6+0x76a/0xfb0 net/bridge/br_netfilter_ipv6.c:154 NF_HOOK include/linux/netfilter.h:314 [inline] br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:184 br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:536 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:277 [inline] br_handle_frame+0x9eb/0x1490 net/bridge/br_input.c:424 __netif_receive_skb_core.constprop.0+0xa76/0x4470 net/core/dev.c:5566 __netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5670 __netif_receive_skb+0x1d/0x160 net/core/dev.c:5785 process_backlog+0x443/0x15f0 net/core/dev.c:6117 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6883 napi_poll net/core/dev.c:6952 [inline] net_rx_action+0xa94/0x1010 net/core/dev.c:7074 handle_softirqs+0x213/0x8f0 kernel/softirq.c:561 run_ksoftirqd kernel/softirq.c:950 [inline] run_ksoftirqd+0x3a/0x60 kernel/softirq.c:942 smpboot_thread_fn+0x661/0xa30 kernel/smpboot.c:164 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:83:a9:e0:ba:e9, vlan:0)