bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9200/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=30141, q=8233 ncpus=2)
task:syz.0.744 state:R running task stack:29000 pid:9200 tgid:9177 ppid:5818 task_flags:0x400040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6908
preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7235
irqentry_exit+0x17b/0x670 kernel/entry/common.c:239
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x64/0x70 kernel/kcov.c:235
Code: 82 70 16 00 00 83 f8 02 75 e6 48 8b 8a 78 16 00 00 8b 92 74 16 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 cd 48 89 01 48 89 34 c1 d7 eb 87 09 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90017c87b80 EFLAGS: 00000283
RAX: 000000000000863e RBX: 0000000000000001 RCX: ffffc9000f373000
RDX: 0000000000080000 RSI: ffffffff82805be8 RDI: ffff8880303b0000
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffea0000e64780
R13: 0000004773b7bd8d R14: 0000000000000000 R15: 0000000007c00294
rcu_read_unlock include/linux/rcupdate.h:879 [inline]
page_ext_put+0x58/0xd0 mm/page_ext.c:579
__reset_page_owner+0x7a/0x190 mm/page_owner.c:312
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0x7e1/0x10d0 mm/page_alloc.c:2978
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree+0x55/0x80 mm/vmalloc.c:3456
snd_dma_free_pages+0xd2/0x140 sound/core/memalloc.c:132
do_free_pages sound/core/pcm_memory.c:88 [inline]
do_free_pages sound/core/pcm_memory.c:83 [inline]
snd_pcm_lib_free_pages+0x172/0x390 sound/core/pcm_memory.c:495
do_hw_free sound/core/pcm_native.c:916 [inline]
snd_pcm_release_substream.part.0+0x2a8/0x340 sound/core/pcm_native.c:2740
snd_pcm_release_substream+0x5b/0x70 sound/core/pcm_native.c:2734
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2401 [inline]
snd_pcm_oss_release_file sound/core/oss/pcm_oss.c:2393 [inline]
snd_pcm_oss_release+0x16f/0x300 sound/core/oss/pcm_oss.c:2580
__fput+0x3ff/0xb40 fs/file_table.c:469
task_work_run+0x150/0x240 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0x100/0x4a0 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
do_syscall_64+0x668/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f376119c799
RSP: 002b:00007f3762023028 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f3761416360 RCX: 00007f376119c799
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000002
RBP: 00007f3761232bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f37614163f8 R14: 00007f3761416360 R15: 00007fffaceeaa88
rcu: rcu_preempt kthread starved for 9788 jiffies! g30141 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:27832 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0xfee/0x6120 kernel/sched/core.c:6908
__schedule_loop kernel/sched/core.c:6990 [inline]
schedule+0xdd/0x390 kernel/sched/core.c:7005
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
kthread+0x370/0x450 kernel/kthread.c:436
ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
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 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:231 [inline]
RIP: 0010:unwind_next_frame+0x297/0x1ea0 arch/x86/kernel/unwind_orc.c:510
Code: 29 48 89 54 24 30 89 4c 24 28 89 74 24 20 44 89 5c 24 18 e8 6b eb bb 00 48 8b 54 24 30 8b 4c 24 28 8b 74 24 20 44 8b 5c 24 18 <89> cf 8b 14 95 88 76 33 92 48 8d 04 7f 48 8d 84 00 78 a7 6e 91 83
RSP: 0018:ffffc90000a08608 EFLAGS: 00000246
RAX: 0000000000000003 RBX: 0000000000000002 RCX: 000000000019b847
RDX: 0000000000086008 RSI: 00000000000a90df RDI: ffffffff9254f6a8
RBP: ffffc90000a086c0 R08: 0000000000000000 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000086007 R12: ffffc90000a086c8
R13: ffffc90000a08678 R14: ffffc90000a086ad R15: ffffffff89600719
FS: 0000000000000000(0000) GS:ffff88812444d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe695dacdec CR3: 0000000066a78000 CR4: 00000000003526f0
Call Trace:
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
kasan_save_free_info+0x3b/0x70 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:253 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2692 [inline]
slab_free mm/slub.c:6143 [inline]
kmem_cache_free+0x124/0x6a0 mm/slub.c:6273
kfree_skbmem+0x19a/0x210 net/core/skbuff.c:1151
__kfree_skb net/core/skbuff.c:1218 [inline]
sk_skb_reason_drop+0x10f/0x1b0 net/core/skbuff.c:1255
kfree_skb_reason include/linux/skbuff.h:1322 [inline]
kfree_skb include/linux/skbuff.h:1331 [inline]
ip6_mc_input+0x832/0xf50 net/ipv6/ip6_input.c:593
dst_input include/net/dst.h:480 [inline]
ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline]
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
ipv6_rcv+0x34c/0x3d0 net/ipv6/ip6_input.c:311
__netif_receive_skb_one_core+0x12d/0x1e0 net/core/dev.c:6164
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6277
process_backlog+0x37a/0x1580 net/core/dev.c:6628
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7692
napi_poll net/core/dev.c:7755 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:7912
handle_softirqs+0x1eb/0x9e0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xef/0x150 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: d8 85 02 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 66 90 0f 00 2d 23 ae 1e 00 fb f4 fc 35 03 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197df0 EFLAGS: 00000242
RAX: 00000000008f3ef1 RBX: ffff88801e6e8000 RCX: ffffffff8b8cdc75
RDX: 0000000000000000 RSI: ffffffff8de7be29 RDI: ffffffff8c1af7a0
RBP: 0000000000000001 R08: 0000000000000001 R09: ffffed10170a6795
R10: ffff8880b8533cab R11: 0000000000000000 R12: ffffed1003cdd000
R13: 0000000000000001 R14: ffffffff90d9b710 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:73 [inline]
default_idle+0x9/0x10 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x35b/0x4b0 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
common_startup_64+0x13e/0x148
net_ratelimit: 15588 callbacks suppressed
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 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 bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)