bridge0: received packet on veth0_to_bridge with own address as source address (addr:92:8b:07:1c:13:06, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:92:8b:07:1c:13:06, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6108/1:b.el
rcu: (detected by 0, t=10502 jiffies, g=12201, q=541 ncpus=2)
task:syz.2.88 state:R running task stack:25768 pid:6108 ppid:5772 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
preempt_schedule_notrace+0xdd/0x110 kernel/sched/core.c:6960
preempt_schedule_notrace_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:46
rcu_is_watching+0x7a/0xb0 kernel/rcu/tree.c:701
rcu_read_lock include/linux/rcupdate.h:787 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
percpu_ref_put+0x40/0x100 include/linux/percpu-refcount.h:351
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc_lru+0x111/0x2d0 mm/slub.c:3526
alloc_inode_sb include/linux/fs.h:2946 [inline]
sock_alloc_inode+0x28/0xc0 net/socket.c:308
alloc_inode fs/inode.c:261 [inline]
new_inode_pseudo+0x63/0x1d0 fs/inode.c:1049
sock_alloc net/socket.c:634 [inline]
__sock_create+0x12d/0x940 net/socket.c:1534
sock_create net/socket.c:1626 [inline]
__sys_socketpair+0x1c1/0x550 net/socket.c:1777
__do_sys_socketpair net/socket.c:1830 [inline]
__se_sys_socketpair net/socket.c:1827 [inline]
__x64_sys_socketpair+0x9b/0xb0 net/socket.c:1827
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc1abb9c819
RSP: 002b:00007fc1aca9c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007fc1abe15fa0 RCX: 00007fc1abb9c819
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007fc1abc32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc1abe16038 R14: 00007fc1abe15fa0 R15: 00007ffeb34c6198
rcu: rcu_preempt kthread starved for 1540 jiffies! g12201 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:27656 pid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 6112 Comm: syz.3.90 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:lock_is_held_type+0x152/0x190 kernel/locking/lockdep.c:5830
Code: 00 75 46 41 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e <41> 5f 5d c3 0f 0b 48 c7 c7 e0 c9 ca 8a e8 3c 12 00 00 65 c7 05 99
RSP: 0018:ffffc90000007248 EFLAGS: 00000286
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 190071c5c4422500
RDX: ffff88807b6d8000 RSI: ffffffff8acadb60 RDI: ffffffff8b1c8de0
RBP: 0000000000000001 R08: ffffc900000074e0 R09: ffffc900000074f0
R10: ffffc90000007340 R11: fffff52000000e6a R12: 1ffff1100bdbfb8c
R13: dffffc0000000000 R14: ffff88805ee8a800 R15: ffff88807b6d8b08
FS: 00007f622e60b6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056136a7c3a38 CR3: 000000001c79d000 CR4: 00000000003506f0
Call Trace:
__find_rr_leaf+0x354/0x760 net/ipv6/route.c:835
find_rr_leaf net/ipv6/route.c:891 [inline]
rt6_select net/ipv6/route.c:935 [inline]
fib6_table_lookup+0x3b5/0xa80 net/ipv6/route.c:2232
ip6_pol_route+0x239/0x1230 net/ipv6/route.c:2268
pol_lookup_func include/net/ip6_fib.h:641 [inline]
fib6_rule_lookup+0x20c/0x570 net/ipv6/fib6_rules.c:116
ip6_route_input_lookup net/ipv6/route.c:2337 [inline]
ip6_route_input+0x732/0xa50 net/ipv6/route.c:2633
ip6_rcv_finish+0x143/0x230 net/ipv6/ip6_input.c:77
NF_HOOK+0x32d/0x3b0 include/linux/netfilter.h:304
__netif_receive_skb_one_core net/core/dev.c:5634 [inline]
__netif_receive_skb+0xcc/0x290 net/core/dev.c:5748
process_backlog+0x391/0x6f0 net/core/dev.c:6076
__napi_poll+0xc0/0x460 net/core/dev.c:6638
napi_poll net/core/dev.c:6705 [inline]
net_rx_action+0x616/0xc40 net/core/dev.c:6841
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 5b b9 cc f6 65 8b 05 cc e6 73 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000bb1f180 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: 190071c5c4422500
RDX: dffffc0000000000 RSI: ffffffff8acac9e0 RDI: 0000000000000001
RBP: ffffc9000bb1f208 R08: ffffffff911c452f R09: 1ffffffff22388a5
R10: dffffc0000000000 R11: fffffbfff22388a6 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8880305294c0 R15: 1ffff92001763e30
finish_task_switch+0x436/0x8f0 kernel/sched/core.c:5285
context_switch kernel/sched/core.c:5384 [inline]
__schedule+0x155b/0x45a0 kernel/sched/core.c:6700
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
unwind_next_frame+0x200f/0x2970 arch/x86/kernel/unwind_orc.c:672
__unwind_start+0x66a/0x7e0 arch/x86/kernel/unwind_orc.c:760
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xf8/0x190 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
save_stack+0x125/0x230 mm/page_owner.c:128
__reset_page_owner+0x4e/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1181 [inline]
free_unref_page_prepare+0x7b2/0x8c0 mm/page_alloc.c:2365
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2458
discard_slab mm/slub.c:2127 [inline]
__unfreeze_partials+0x1cf/0x210 mm/slub.c:2667
put_cpu_partial+0x17c/0x250 mm/slub.c:2743
__slab_free+0x319/0x400 mm/slub.c:3700
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4b0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x11a/0x2d0 mm/slub.c:3519
sk_prot_alloc+0x57/0x210 net/core/sock.c:2090
sk_alloc+0x3a/0x360 net/core/sock.c:2152
unix_create1+0xb0/0x790 net/unix/af_unix.c:-1
unix_create+0x154/0x1f0 net/unix/af_unix.c:1084
__sock_create+0x4a6/0x940 net/socket.c:1570
sock_create net/socket.c:1626 [inline]
__sys_socketpair+0x236/0x550 net/socket.c:1781
__do_sys_socketpair net/socket.c:1830 [inline]
__se_sys_socketpair net/socket.c:1827 [inline]
__x64_sys_socketpair+0x9b/0xb0 net/socket.c:1827
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f622d79c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f622e60b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f622da15fa0 RCX: 00007f622d79c819
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f622d832c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f622da16038 R14: 00007f622da15fa0 R15: 00007fff5be91838
bridge0: received packet on veth0_to_bridge with own address as source address (addr:92:8b:07:1c:13:06, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
net_ratelimit: 23 callbacks suppressed
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)