bridge0: received packet on veth0_to_bridge with own address as source address (addr:8e:c3:4d:30:32:f1, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6356/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=13265, q=3174 ncpus=2)
task:syz.3.115 state:R running task stack:25096 pid:6356 tgid:6354 ppid:5879 task_flags:0x400040 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288
irqentry_exit+0x6f/0x90 kernel/entry/common.c:197
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:182 [inline]
RIP: 0010:percpu_ref_get_many+0x9f/0x140 include/linux/percpu-refcount.h:204
Code: 98 8b e8 14 aa 71 ff 49 bc 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 a4 4c f7 ff 49 8b 07 03 75 62 65 4c 01 30 e8 94 a3 4e 09 85 c0 74 3a e8 5b 81 7a ff
RSP: 0018:ffffc90002e277f0 EFLAGS: 00000246
RAX: 0000607eda05bc40 RBX: ffffffff822bdab9 RCX: d2f27de96d814e00
RDX: 0000000000000000 RSI: ffffffff8be33f60 RDI: ffffffff8be33f20
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff822bdab9
R10: dffffc0000000000 R11: fffffbfff1f474e7 R12: dffffc0000000000
R13: ffffc90002e279c0 R14: 0000000000000001 R15: ffff88814a4f3a00
percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
obj_cgroup_get include/linux/memcontrol.h:772 [inline]
__memcg_slab_post_alloc_hook+0x522/0x7f0 mm/memcontrol.c:3194
memcg_slab_post_alloc_hook mm/slub.c:2221 [inline]
slab_post_alloc_hook mm/slub.c:4201 [inline]
kmem_cache_alloc_bulk_noprof+0x562/0x790 mm/slub.c:5426
__io_alloc_req_refill+0x9d/0x280 io_uring/io_uring.c:1003
io_alloc_req io_uring/io_uring.h:453 [inline]
io_submit_sqes+0xbfd/0x1d30 io_uring/io_uring.c:2385
__do_sys_io_uring_enter io_uring/io_uring.c:3463 [inline]
__se_sys_io_uring_enter+0x2df/0x2b20 io_uring/io_uring.c:3397
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe0b058eec9
RSP: 002b:00007fe0b14da038 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007fe0b07e5fa0 RCX: 00007fe0b058eec9
RDX: 0000000000000000 RSI: 00000000000047bc RDI: 0000000000000004
RBP: 00007fe0b0611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe0b07e6038 R14: 00007fe0b07e5fa0 R15: 00007fe0b090fa28
rcu: rcu_preempt kthread starved for 1154 jiffies! g13265 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:27848 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7058
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+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
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 08/18/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: 53 e8 02 00 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 b3 b9 0d 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c2
RAX: b79ddd5ef2086300 RBX: ffffffff81968488 RCX: b79ddd5ef2086300
RDX: 0000000000000001 RSI: ffffffff8d9ba571 RDI: ffffffff8be33f80
RBP: ffffc90000197f20 R08: ffff8880b8732f9b R09: 1ffff110170e65f3
R10: dffffc0000000000 R11: ffffed10170e65f4 R12: ffffffff8fa3a730
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110039d6b40
FS: 0000000000000000(0000) GS:ffff888125d12000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff37053f19 CR3: 000000007616e000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:757
default_idle_call+0x74/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x1e8/0x510 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
net_ratelimit: 16366 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:8e:c3:4d:30:32:f1, 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:8e:c3:4d:30:32:f1, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:8e:c3:4d:30:32:f1, vlan:0)
net_ratelimit: 20110 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:8e:c3:4d:30:32:f1, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:8e:c3:4d:30:32:f1, 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:8e:c3:4d:30:32:f1, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)