bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:a6:b4:2e:ba:49, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P24491/1:b..l.. P24496/1:b..l..
rcu: (detected by 0, t=10513 jiffies, g=128585, q=2494 ncpus=2)
task:syz-executor state:R running task stack:28168 pid:24496 tgid:24496 ppid:22970 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__preempt_count_add arch/x86/include/asm/preempt.h:98 [inline]
RIP: 0010:rcu_is_watching+0x9/0xb0 kernel/rcu/tree.c:752
Code: 7d 03 eb cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 53 <65> 48 ff 05 2f 9c 12 13 e8 2a 60 55 0a 89 c3 83 f8 08 73 66 49 bf
RSP: 0018:ffffc90008a87760 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90008a87838 RCX: ffff8880790e8000
RDX: ffffffff922d4200 RSI: 0000000000000000 RDI: ffffc90008a87830
RBP: 1ffffffff245a801 R08: ffffc90008a87f48 R09: 0000000000000000
R10: ffffc90008a87878 R11: ffffffff81b3a880 R12: ffffc90008a80000
R13: ffffffff817879cf R14: ffffc90008a87828 R15: 00007ffc129fc108
rcu_read_unlock include/linux/rcupdate.h:878 [inline]
class_rcu_destructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0x1b66/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2954
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
__do_kmalloc_node mm/slub.c:5530 [inline]
__kmalloc_node_track_caller_noprof+0x446/0x720 mm/slub.c:5662
kmemdup_noprof+0x2b/0x70 mm/util.c:138
kmemdup_noprof include/linux/fortify-string.h:713 [inline]
shmem_symlink+0x19f/0x4d0 mm/shmem.c:4280
vfs_symlink+0x18e/0x330 fs/namei.c:5806
filename_symlinkat+0x1cd/0x410 fs/namei.c:5831
__do_sys_symlinkat fs/namei.c:5851 [inline]
__se_sys_symlinkat+0x4e/0x2b0 fs/namei.c:5846
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb0e6b9e617
RSP: 002b:00007ffc129fc108 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb0e6b9e617
RDX: 00007fb0e6c37b33 RSI: 00000000ffffff9c RDI: 00007ffc129fc1a0
RBP: 00007ffc129fc14c R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000001d
R13: 00000000000927c0 R14: 00000000000a32af R15: 00007ffc129fc1a0
task:syz.3.4448 state:R running task stack:25480 pid:24491 tgid:24491 ppid:20113 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 20 99 5e 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 22 f3 1b 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 3f ac 61 0a cc 48 8d 3d a7 90 fc
RSP: 0000:ffffc90004f2f520 EFLAGS: 00000292
RAX: ad56148cbbd21e00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000a37e816d RSI: ffffffff8e92d57d RDI: ffffffff8c8e8c80
RBP: ffff8880367b9f40 R08: ffffffff817879cf R09: 0000000000000000
R10: ffffc90004f2f658 R11: ffffffff81b3a880 R12: ffffffff8ff5a320
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1403 [inline]
__free_frozen_pages+0xc97/0xd90 mm/page_alloc.c:2954
__slab_free+0x269/0x2c0 mm/slub.c:5926
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4720 [inline]
slab_alloc_node mm/slub.c:5033 [inline]
kmem_cache_alloc_noprof+0x2b4/0x600 mm/slub.c:5047
anon_vma_alloc mm/rmap.c:94 [inline]
__anon_vma_prepare+0x109/0x4a0 mm/rmap.c:201
__vmf_anon_prepare mm/memory.c:4024 [inline]
vmf_anon_prepare mm/internal.h:574 [inline]
do_anonymous_page mm/memory.c:5547 [inline]
do_pte_missing+0x2f81/0x3570 mm/memory.c:4761
handle_pte_fault mm/memory.c:6627 [inline]
__handle_mm_fault mm/memory.c:6776 [inline]
handle_mm_fault+0x1a53/0x3750 mm/memory.c:6943
do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f715b95c704
RSP: 002b:00007ffc13b3c880 EFLAGS: 00010246
RAX: 00007f715c81c000 RBX: 00007f715c83c6c0 RCX: 00007f715b99f357
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f715c83c6c0
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000021000 R11: 0000000000000206 R12: 00007ffc13b3c9d0
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
rcu: rcu_preempt kthread starved for 699 jiffies! g128585 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:26752 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 62 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:228 [inline]
RIP: 0010:unwind_next_frame+0x201/0x2550 arch/x86/kernel/unwind_orc.c:510
Code: 39 f8 0f 86 6c 04 00 00 44 89 f8 4c 8d 2c 85 f8 4b e8 92 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 4c 89 e3 0f 85 66 1d 00 00 <45> 8b 6d 00 44 89 f8 ff c0 4c 8d 24 85 f8 4b e8 92 4c 89 e0 48 c1
RSP: 0018:ffffc90000a076c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 8000000000000100
RDX: 00000000000b06bb RSI: ffffffff8c8e8c60 RDI: ffffffff8c8e8c20
RBP: ffffffff89d0bf5c R08: ffffffff817879cf R09: 0000000000000000
R10: ffffc90000a077b8 R11: ffffffff81b3a880 R12: dffffc0000000000
R13: ffffffff930b8ef4 R14: ffffc90000a07768 R15: 000000000008d0bf
FS: 0000000000000000(0000) GS:ffff88812371f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f715c85dd58 CR3: 000000000fd48000 CR4: 00000000003526f0
Call Trace:
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
poison_slab_object mm/kasan/common.c:264 [inline]
__kasan_slab_free+0x5c/0x80 mm/kasan/common.c:296
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:2780 [inline]
slab_free mm/slub.c:6630 [inline]
kmem_cache_free+0x182/0x650 mm/slub.c:6757
skb_ext_del include/linux/skbuff.h:5128 [inline]
nf_bridge_info_free net/bridge/br_netfilter_hooks.c:158 [inline]
br_nf_dev_queue_xmit+0x4f6/0x25c0 net/bridge/br_netfilter_hooks.c:857
NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:325
br_nf_post_routing+0xa51/0xee0 net/bridge/br_netfilter_hooks.c:965
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:323
br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:80
br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1166 [inline]
br_nf_forward_finish+0xa76/0xea0 net/bridge/br_netfilter_hooks.c:668
NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:325
br_nf_forward_ip+0x7e7/0xa30 net/bridge/br_netfilter_hooks.c:722
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:323
__br_forward+0x41e/0x5d0 net/bridge/br_forward.c:130
br_flood+0x402/0x650 net/bridge/br_forward.c:352
br_handle_frame_finish+0x11fc/0x1ae0 net/bridge/br_input.c:231
br_nf_hook_thresh+0x3dd/0x4c0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x90c/0xc40 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:325 [inline]
br_nf_pre_routing_ipv6+0x382/0x6f0 net/bridge/br_netfilter_ipv6.c:183
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:293 [inline]
br_handle_frame+0x1329/0x1600 net/bridge/br_input.c:453
__netif_receive_skb_core+0x989/0x30f0 net/core/dev.c:6312
__netif_receive_skb_one_core net/core/dev.c:6431 [inline]
__netif_receive_skb net/core/dev.c:6546 [inline]
process_backlog+0x727/0x18b0 net/core/dev.c:6897
__napi_poll+0xaa/0x330 net/core/dev.c:7977
napi_poll net/core/dev.c:8040 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8197
handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
do_softirq+0x77/0xd0 kernel/softirq.c:569
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:816 [inline]
nsim_dev_trap_report_work+0x7a4/0xb30 drivers/net/netdevsim/dev.c:847
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
net_ratelimit: 18268 callbacks suppressed
bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:a6:b4:2e:ba:49, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:a6:b4:2e:ba:49, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:a6:b4:2e:ba:49, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:a6:b4:2e:ba:49, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:a6:b4:2e:ba:49, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:a6:b4:2e:ba:49, vlan:0)
net_ratelimit: 24046 callbacks suppressed
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:9a:a6:b4:2e:ba:49, vlan:0)