bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12310/2:b..l
rcu: (detected by 1, t=10503 jiffies, g=53349, q=1227 ncpus=2)
task:syz.0.1615 state:R running task stack:24312 pid:12310 tgid:12310 ppid:5806 task_flags:0x2040004c flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7256
irqentry_exit+0x36/0x90 kernel/entry/common.c:211
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_release+0x183/0x2f0 kernel/locking/lockdep.c:5893
Code: 0f c1 05 38 9e 0b 12 83 f8 01 0f 85 1d 01 00 00 9c 58 f6 c4 02 0f 85 08 01 00 00 41 f7 c5 00 02 00 00 74 01 fb 48 8b 44 24 10 <65> 48 2b 05 4d 5c 0b 12 0f 85 58 01 00 00 48 83 c4 18 5b 41 5c 41
RSP: 0018:ffffc90003b2eb40 EFLAGS: 00000206
RAX: 6780fc07fcd4e200 RBX: ffffffff8e3c4460 RCX: ffffc90003b2eb4c
RDX: 0000000000000001 RSI: ffffffff8dadd953 RDI: ffffffff8bf1e3c0
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000000383f2 R12: ffffffff816c4914
R13: 0000000000000202 R14: ffff88803381c900 R15: 0000000000000002
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:897 [inline]
class_rcu_destructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0x3f9/0x20a0 arch/x86/kernel/unwind_orc.c:479
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:56
kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:559
slab_free_hook mm/slub.c:2484 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x15e/0x6c0 mm/slub.c:6721
mempool_free+0x102/0x750 mm/mempool.c:576
bio_put_percpu_cache block/bio.c:805 [inline]
bio_put+0x355/0x5b0 block/bio.c:824
bio_endio+0x713/0x860 block/bio.c:1672
blk_update_request+0x93e/0x15f0 block/blk-mq.c:998
blk_mq_end_request+0x4f/0x90 block/blk-mq.c:1160
blk_mq_complete_request block/blk-mq.c:1338 [inline]
blk_mq_complete_request+0x8b/0xb0 block/blk-mq.c:1335
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_list block/blk-mq.c:2837 [inline]
__blk_mq_flush_list+0x9a/0xc0 block/blk-mq.c:2833
blk_mq_dispatch_queue_requests+0x184/0x7b0 block/blk-mq.c:2882
blk_mq_flush_plug_list+0x1f2/0x600 block/blk-mq.c:2970
blk_add_rq_to_plug+0x1ca/0x540 block/blk-mq.c:1399
blk_mq_submit_bio+0x1ecc/0x3380 block/blk-mq.c:3222
__submit_bio+0x3cf/0x690 block/blk-core.c:637
__submit_bio_noacct_mq block/blk-core.c:724 [inline]
submit_bio_noacct_nocheck+0x53d/0xc10 block/blk-core.c:755
submit_bio_noacct+0xbbb/0x1f60 block/blk-core.c:879
__block_write_full_folio+0x735/0xe00 fs/buffer.c:1933
block_write_full_folio+0x341/0x400 fs/buffer.c:2753
blkdev_writepages+0xb8/0x140 block/fops.c:491
do_writepages+0x27a/0x600 mm/page-writeback.c:2604
filemap_fdatawrite_wbc mm/filemap.c:389 [inline]
filemap_fdatawrite_wbc+0x104/0x160 mm/filemap.c:379
__filemap_fdatawrite_range+0xb9/0x100 mm/filemap.c:422
filemap_write_and_wait_range mm/filemap.c:694 [inline]
filemap_write_and_wait_range+0xa3/0x130 mm/filemap.c:685
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:709
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x86f/0x2bf0 kernel/exit.c:966
do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
__do_sys_exit_group kernel/exit.c:1118 [inline]
__se_sys_exit_group kernel/exit.c:1116 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116
x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa702f8eec9
RSP: 002b:00007fffb0b08a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa702f8eec9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffb0b08a9c R08: 0000001db0b08b2f R09: 00000000000927c0
R10: 0000000000043888 R11: 0000000000000246 R12: 0000000000000155
R13: 00000000000927c0 R14: 0000000000087aef R15: 00007fffb0b08af0
rcu: rcu_preempt kthread starved for 216 jiffies! g53349 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:28120 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7026
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 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: 12116 Comm: kworker/u8:5 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:lock_acquire+0x62/0x350 kernel/locking/lockdep.c:5872
Code: 57 0b 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 a2 14 ea 0e 0f 82 74 02 00 00 8b 35 1a 45 ea 0e 85 f6 0f 85 8d 00 00 00 <48> 8b 44 24 30 65 48 2b 05 b9 56 0b 12 0f 85 c7 02 00 00 48 83 c4
RSP: 0018:ffffc90000a07408 EFLAGS: 00000206
RAX: 0000000000000046 RBX: ffffffff8e3c4460 RCX: 000000003812b9d3
RDX: 0000000000000000 RSI: ffffffff8dadd953 RDI: ffffffff8bf1e3c0
RBP: 0000000000000002 R08: e9efff99835e4d1c R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888124ad9000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9a55fb12f8 CR3: 000000007376e000 CR4: 00000000003526f0
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:867 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
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:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
__kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587
kasan_save_free_info mm/kasan/kasan.h:406 [inline]
poison_slab_object mm/kasan/common.c:252 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284
kasan_slab_free include/linux/kasan.h:234 [inline]
slab_free_hook mm/slub.c:2523 [inline]
slab_free mm/slub.c:6611 [inline]
kmem_cache_free+0x2d4/0x6c0 mm/slub.c:6721
__skb_ext_put+0x102/0x2c0 net/core/skbuff.c:7160
skb_ext_put include/linux/skbuff.h:4944 [inline]
skb_ext_put include/linux/skbuff.h:4941 [inline]
skb_release_head_state+0x1c2/0x290 net/core/skbuff.c:1144
skb_release_all net/core/skbuff.c:1150 [inline]
__kfree_skb net/core/skbuff.c:1166 [inline]
consume_skb net/core/skbuff.c:1398 [inline]
consume_skb+0x85/0x100 net/core/skbuff.c:1392
dummy_xmit+0x154/0x1c0 drivers/net/dummy.c:65
__netdev_start_xmit include/linux/netdevice.h:5248 [inline]
netdev_start_xmit include/linux/netdevice.h:5257 [inline]
xmit_one net/core/dev.c:3845 [inline]
dev_hard_start_xmit+0x97/0x740 net/core/dev.c:3861
__dev_queue_xmit+0xa46/0x4490 net/core/dev.c:4763
dev_queue_xmit include/linux/netdevice.h:3365 [inline]
br_dev_queue_push_xmit+0x272/0x8a0 net/bridge/br_forward.c:53
br_nf_dev_queue_xmit+0x6e0/0x2b20 net/bridge/br_netfilter_hooks.c:920
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
br_nf_post_routing+0x8e7/0x1190 net/bridge/br_netfilter_hooks.c:966
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xbe/0x200 net/netfilter/core.c:623
nf_hook+0x45e/0x780 include/linux/netfilter.h:273
NF_HOOK include/linux/netfilter.h:316 [inline]
br_forward_finish+0xcd/0x130 net/bridge/br_forward.c:66
br_nf_hook_thresh+0x307/0x410 net/bridge/br_netfilter_hooks.c:1167
br_nf_forward_finish+0x66a/0xba0 net/bridge/br_netfilter_hooks.c:662
NF_HOOK include/linux/netfilter.h:318 [inline]
NF_HOOK include/linux/netfilter.h:312 [inline]
br_nf_forward_ip.part.0+0x609/0x810 net/bridge/br_netfilter_hooks.c:716
br_nf_forward_ip net/bridge/br_netfilter_hooks.c:676 [inline]
br_nf_forward+0xf0f/0x1be0 net/bridge/br_netfilter_hooks.c:773
nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
nf_hook_slow+0xbe/0x200 net/netfilter/core.c:623
nf_hook+0x45e/0x780 include/linux/netfilter.h:273
NF_HOOK include/linux/netfilter.h:316 [inline]
__br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver+0xf1/0x180 net/bridge/br_forward.c:191
br_flood+0x17c/0x650 net/bridge/br_forward.c:238
br_handle_frame_finish+0x10e6/0x1ec0 net/bridge/br_input.c:229
br_nf_hook_thresh+0x307/0x410 net/bridge/br_netfilter_hooks.c:1167
br_nf_pre_routing_finish_ipv6+0x76a/0xfc0 net/bridge/br_netfilter_ipv6.c:154
NF_HOOK include/linux/netfilter.h:318 [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:158 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0xad8/0x14b0 net/bridge/br_input.c:442
__netif_receive_skb_core.constprop.0+0xa25/0x4bd0 net/core/dev.c:5966
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6077
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6192
process_backlog+0x439/0x15e0 net/core/dev.c:6544
__napi_poll.constprop.0+0xba/0x550 net/core/dev.c:7594
napi_poll net/core/dev.c:7657 [inline]
net_rx_action+0x97f/0xef0 net/core/dev.c:7784
handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
do_softirq kernel/softirq.c:523 [inline]
do_softirq+0xb2/0xf0 kernel/softirq.c:510
__local_bh_enable_ip+0x100/0x120 kernel/softirq.c:450
spin_unlock_bh include/linux/spinlock.h:396 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:835 [inline]
nsim_dev_trap_report_work+0x8b5/0xcf0 drivers/net/netdevsim/dev.c:866
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
net_ratelimit: 2 callbacks suppressed
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
net_ratelimit: 6 callbacks suppressed
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:5e:b7:0e:11:4d:36, vlan:0)