bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6730/2:b..l
rcu: (detected by 1, t=10503 jiffies, g=18233, q=1912 ncpus=2)
task:syz.1.150 state:R running task stack:25000 pid:6730 tgid:6729 ppid:5836 task_flags:0x20400140 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7090
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:218 [inline]
RIP: 0010:unwind_next_frame+0x23d/0x20a0 arch/x86/kernel/unwind_orc.c:494
Code: 89 74 24 20 89 44 24 18 e8 f0 99 b5 00 48 8b 4c 24 30 48 8b 44 24 28 8b 74 24 20 44 8b 5c 24 18 8d 50 01 8b 0c 8d fc a7 d3 91 <48> b8 00 00 00 00 00 fc ff df 48 8d 3c 95 fc a7 d3 91 49 89 f8 49
RSP: 0018:ffffc9000c066948 EFLAGS: 00000246
RAX: 000000000003ab51 RBX: 0000000000000001 RCX: 00000000000ab630
RDX: 000000000003ab52 RSI: 00000000000a6d52 RDI: ffffffff91e25540
RBP: ffffc9000c066a00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 000000000003ab51 R12: ffffc9000c066a08
R13: ffffc9000c0669b8 R14: ffffc9000c0669ed R15: ffffffff84ab51bc
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xb8/0xd0 mm/kasan/generic.c:548
slab_free_hook mm/slub.c:2341 [inline]
slab_free mm/slub.c:4642 [inline]
kmem_cache_free+0x160/0x4d0 mm/slub.c:4744
mempool_free+0xe7/0x3b0 mm/mempool.c:548
bio_put_percpu_cache block/bio.c:800 [inline]
bio_put+0x355/0x5b0 block/bio.c:819
bio_endio+0x6d2/0x810 block/bio.c:1551
blk_update_request+0x96b/0x1630 block/blk-mq.c:983
blk_mq_end_request+0x5b/0x620 block/blk-mq.c:1145
blk_mq_complete_request block/blk-mq.c:1323 [inline]
blk_mq_complete_request+0x8b/0xb0 block/blk-mq.c:1320
nullb_complete_cmd drivers/block/null_blk/main.c:1402 [inline]
null_handle_cmd drivers/block/null_blk/main.c:1454 [inline]
null_queue_rq+0xb69/0xfd0 drivers/block/null_blk/main.c:1693
null_queue_rqs+0xe9/0x2f0 drivers/block/null_blk/main.c:1707
__blk_mq_flush_plug_list block/blk-mq.c:2825 [inline]
__blk_mq_flush_plug_list+0x9a/0xc0 block/blk-mq.c:2820
blk_mq_flush_plug_list+0x1698/0x1c70 block/blk-mq.c:2904
blk_add_rq_to_plug+0x1ca/0x540 block/blk-mq.c:1384
blk_mq_submit_bio+0x19b4/0x2600 block/blk-mq.c:3156
__submit_bio+0x3cf/0x690 block/blk-core.c:635
__submit_bio_noacct_mq block/blk-core.c:722 [inline]
submit_bio_noacct_nocheck+0x663/0xd30 block/blk-core.c:751
submit_bio_noacct+0x50d/0x1ec0 block/blk-core.c:874
__block_write_full_folio+0x735/0xe00 fs/buffer.c:1937
block_write_full_folio+0x341/0x400 fs/buffer.c:2758
write_cache_pages+0xaf/0x130 mm/page-writeback.c:2613
blkdev_writepages+0xa5/0xf0 block/fops.c:458
do_writepages+0x1b2/0x820 mm/page-writeback.c:2656
filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:376
__filemap_fdatawrite_range+0xb2/0xf0 mm/filemap.c:419
filemap_write_and_wait_range mm/filemap.c:691 [inline]
filemap_write_and_wait_range+0xa3/0x130 mm/filemap.c:682
filemap_write_and_wait include/linux/pagemap.h:68 [inline]
sync_blockdev block/bdev.c:260 [inline]
sync_blockdev block/bdev.c:256 [inline]
bdev_release+0x4d3/0x6d0 block/bdev.c:1126
blkdev_release+0x15/0x20 block/fops.c:660
__fput+0x3ff/0xb70 fs/file_table.c:465
task_work_run+0x14d/0x240 kernel/task_work.c:227
get_signal+0x1d1/0x26d0 kernel/signal.c:2807
arch_do_signal_or_restart+0x8f/0x7a0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x230 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f169798e969
RSP: 002b:00007f1698729038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000400000 RBX: 00007f1697bb5fa0 RCX: 00007f169798e969
RDX: 000000007fffffff RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f1697a10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1697bb5fa0 R15: 00007ffd50ec5e68
rcu: rcu_preempt kthread starved for 289 jiffies! g18233 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:27704 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2046
rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2248
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153
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 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data+0x11/0x90 kernel/kcov.c:246
Code: b1 09 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 49 89 f8 49 89 f1 65 48 8b 15 67 c6 e8 11 <65> 8b 05 78 c6 e8 11 a9 00 01 ff 00 74 1d f6 c4 01 74 67 a9 00 00
RSP: 0018:ffffc90000a07c58 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000046 RCX: ffffffff89447951
RDX: ffff88801dadda00 RSI: 00000000000005ee RDI: 0000000000000004
RBP: ffff888039384dc0 R08: 0000000000000004 R09: 00000000000005ee
R10: 0000000000000046 R11: 0000000000005bc7 R12: 00000000000005ee
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888039384e74
FS: 0000000000000000(0000) GS:ffff888124ae9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f649483ff18 CR3: 00000000697f2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__is_skb_forwardable include/linux/netdevice.h:4249 [inline]
is_skb_forwardable+0x101/0x210 net/core/dev.c:2360
br_dev_queue_push_xmit+0x9e/0x8a0 net/bridge/br_forward.c:36
br_nf_dev_queue_xmit+0x6f3/0x2cb0 net/bridge/br_netfilter_hooks.c:923
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
br_nf_post_routing+0x8e7/0x1190 net/bridge/br_netfilter_hooks.c:969
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
nf_hook+0x45e/0x780 include/linux/netfilter.h:269
NF_HOOK include/linux/netfilter.h:312 [inline]
br_forward_finish+0xcd/0x130 net/bridge/br_forward.c:66
br_nf_hook_thresh+0x301/0x410 net/bridge/br_netfilter_hooks.c:1170
br_nf_forward_finish+0x66a/0xba0 net/bridge/br_netfilter_hooks.c:665
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
br_nf_forward_ip.part.0+0x609/0x810 net/bridge/br_netfilter_hooks.c:719
br_nf_forward_ip net/bridge/br_netfilter_hooks.c:679 [inline]
br_nf_forward+0xf0f/0x1be0 net/bridge/br_netfilter_hooks.c:776
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626
nf_hook+0x45e/0x780 include/linux/netfilter.h:269
NF_HOOK include/linux/netfilter.h:312 [inline]
__br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
br_flood+0x39c/0x650 net/bridge/br_forward.c:249
br_handle_frame_finish+0xe8e/0x1c20 net/bridge/br_input.c:220
br_nf_hook_thresh+0x301/0x410 net/bridge/br_netfilter_hooks.c:1170
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+0x3cd/0x8c0 net/bridge/br_netfilter_ipv6.c:184
br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:282 [inline]
br_handle_frame+0xad5/0x14a0 net/bridge/br_input.c:433
__netif_receive_skb_core.constprop.0+0xa23/0x4a00 net/core/dev.c:5773
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:5885
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6000
process_backlog+0x442/0x15e0 net/core/dev.c:6352
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:7324
napi_poll net/core/dev.c:7388 [inline]
net_rx_action+0xa97/0x1010 net/core/dev.c:7510
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:81
Code: 06 65 02 e9 83 fc 02 00 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 c3 6e 20 00 fb f4 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197df8 EFLAGS: 000002c2
RAX: 0000000000202915 RBX: 0000000000000001 RCX: ffffffff8b6983e9
RDX: 0000000000000000 RSI: ffffffff8dbdcd2f RDI: ffffffff8bf47460
RBP: ffffed1003b5bb40 R08: 0000000000000001 R09: ffffed10170a65bd
R10: ffff8880b8532deb R11: 0000000000000000 R12: 0000000000000001
R13: ffff88801dadda00 R14: ffffffff90851f10 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:748
default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x391/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x148
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
net_ratelimit: 13546 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:2e:25:4a:f4:48:8b, vlan:0)