bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5188/1:b..l P6578/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=18933, q=815 ncpus=2)
task:syz.2.185       state:R  running task     stack:26088 pid:6578  tgid:6577  ppid:5847   task_flags:0x40054c flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 preempt_schedule_common+0x83/0xd0 kernel/sched/core.c:7113
 preempt_schedule+0xae/0xc0 kernel/sched/core.c:7137
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3f/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 zap_pte_range mm/memory.c:1885 [inline]
 zap_pmd_range mm/memory.c:1947 [inline]
 zap_pud_range mm/memory.c:1976 [inline]
 zap_p4d_range mm/memory.c:1997 [inline]
 unmap_page_range+0x3a7f/0x4370 mm/memory.c:2018
 unmap_single_vma mm/memory.c:2061 [inline]
 unmap_vmas+0x399/0x580 mm/memory.c:2105
 exit_mmap+0x240/0xb40 mm/mmap.c:1280
 __mmput+0x118/0x430 kernel/fork.c:1133
 exit_mm+0x1da/0x2c0 kernel/exit.c:583
 do_exit+0x648/0x2300 kernel/exit.c:955
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1108
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7eb538f749
RSP: 002b:00007f7eb62a4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: 0000000000000003 RBX: 00007f7eb55e5fa0 RCX: 00007f7eb538f749
RDX: 000000000000007a RSI: 0000000000000084 RDI: 0000000000000004
RBP: 00007f7eb5413f91 R08: 0000200000000040 R09: 0000000000000000
R10: 0000200000000340 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7eb55e6038 R14: 00007f7eb55e5fa0 R15: 00007f7eb570fa28
 </TASK>
task:klogd           state:R  running task     stack:24584 pid:5188  tgid:5188  ppid:1      task_flags:0x400100 flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256
 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:unwind_next_frame+0x116b/0x2390 arch/x86/kernel/unwind_orc.c:-1
Code: 4c 89 ef e8 57 b3 b2 00 48 8b 14 24 4d 89 65 00 41 0f b6 04 2f 84 c0 0f 85 f9 0f 00 00 c6 03 00 4c 8b 64 24 10 4c 8b 7c 24 28 <48> 8b 44 24 40 0f b6 04 28 84 c0 0f 85 8a 0d 00 00 41 0f b6 04 2f
RSP: 0018:ffffc90003037298 EFLAGS: 00000246
RAX: ffffc900030373b8 RBX: ffffc900030373a0 RCX: 0000000000000000
RDX: ffffffff90b0e5be RSI: 0000000000000000 RDI: ffffc900030373c8
RBP: dffffc0000000000 R08: ffffc900030373c7 R09: 0000000000000000
R10: ffffc900030373b8 R11: fffff52000606e79 R12: ffffc90003037f48
R13: ffffc900030373b8 R14: ffffc90003037368 R15: 1ffffffff2161cb7
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 save_stack+0xf5/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:311
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2901
 __slab_free+0x2e7/0x390 mm/slub.c:5970
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4978 [inline]
 slab_alloc_node mm/slub.c:5288 [inline]
 kmem_cache_alloc_node_noprof+0x433/0x710 mm/slub.c:5340
 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660
 alloc_skb include/linux/skbuff.h:1383 [inline]
 alloc_skb_with_frags+0xca/0x890 net/core/skbuff.c:6671
 sock_alloc_send_pskb+0x84d/0x980 net/core/sock.c:2965
 unix_dgram_sendmsg+0x461/0x1850 net/unix/af_unix.c:2144
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 __sys_sendto+0x3bd/0x520 net/socket.c:2244
 __do_sys_sendto net/socket.c:2251 [inline]
 __se_sys_sendto net/socket.c:2247 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2247
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5f26e98407
RSP: 002b:00007ffdf1dc0d80 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f5f26d48c80 RCX: 00007f5f26e98407
RDX: 00000000000000a1 RSI: 00007ffdf1dc0ec0 RDI: 0000000000000003
RBP: 00007ffdf1dc12f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffdf1dc1308
R13: 00007ffdf1dc0ec0 R14: 0000000000000086 R15: 00007ffdf1dc0ec0
 </TASK>
rcu: rcu_preempt kthread starved for 10413 jiffies! g18933 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:27288 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x0/0x90 kernel/kcov.c:313
Code: 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 14 25 08 30 6f 92 65 8b 0d 88 ae
RSP: 0018:ffffc90000a08118 EFLAGS: 00000293
RAX: ffffffff89fd0def RBX: ffff88805736b4c8 RCX: 0000000000000100
RDX: ffff88801ce9dac0 RSI: 00000000fffffffd RDI: 00000000fffffffd
RBP: 1ffff1100ae6d699 R08: ffffc90000a08420 R09: ffffc90000a08430
R10: ffffc90000a08280 R11: fffff52000141052 R12: dffffc0000000000
R13: 0000000000000003 R14: 1ffff1100ae6d69b R15: 00000000fffffffd
FS:  0000000000000000(0000) GS:ffff88812622d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0c0ef0eccc CR3: 000000002fe80000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 find_match+0x1d2/0xc90 net/ipv6/route.c:789
 __find_rr_leaf+0x23a/0x6d0 net/ipv6/route.c:868
 find_rr_leaf net/ipv6/route.c:889 [inline]
 rt6_select net/ipv6/route.c:933 [inline]
 fib6_table_lookup+0x39f/0xa80 net/ipv6/route.c:2233
 ip6_pol_route+0x222/0x1180 net/ipv6/route.c:2269
 pol_lookup_func include/net/ip6_fib.h:617 [inline]
 fib6_rule_lookup+0x52f/0x6f0 net/ipv6/fib6_rules.c:120
 ip6_route_input_lookup net/ipv6/route.c:2338 [inline]
 ip6_route_input+0x6de/0xad0 net/ipv6/route.c:2641
 ip6_rcv_finish+0x141/0x2e0 net/ipv6/ip6_input.c:77
 NF_HOOK+0x30c/0x3a0 include/linux/netfilter.h:318
 __netif_receive_skb_one_core net/core/dev.c:6079 [inline]
 __netif_receive_skb+0xd3/0x380 net/core/dev.c:6192
 process_backlog+0x60e/0x14f0 net/core/dev.c:6544
 __napi_poll+0xc7/0x360 net/core/dev.c:7594
 napi_poll net/core/dev.c:7657 [inline]
 net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784
 handle_softirqs+0x286/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 a1 1f 00 f3 0f 1e fa fb f4 <e9> 08 e7 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: d8a9c3775125c300 RBX: ffffffff8196d6e7 RCX: d8a9c3775125c300
RDX: 0000000000000001 RSI: ffffffff8d70fa6b RDI: ffffffff8bbf0560
RBP: ffffc90000197f10 R08: ffff8880b8932f9b R09: 1ffff110171265f3
R10: dffffc0000000000 R11: ffffed10171265f4 R12: ffffffff8f7cf270
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110039d3b58
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:190 [inline]
 do_idle+0x1e7/0x510 kernel/sched/idle.c:330
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
 common_startup_64+0x13e/0x147
 </TASK>
net_ratelimit: 13041 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:72:30:60:d9:7c:b4, vlan:0)