bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12817/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=67129, q=2065 ncpus=2)
task:syz.5.1464 state:R running task stack:24216 pid:12817 tgid:12802 ppid:8514 task_flags:0x400140 flags:0x00024006
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_release+0x2b5/0x3e0 kernel/locking/lockdep.c:5896
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 cb aa fe 10 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90005a3ef50 EFLAGS: 00000206
RAX: 52dd1c79f4982300 RBX: 0000000000000202 RCX: 52dd1c79f4982300
RDX: 0000000000000002 RSI: ffffffff8db6f3d2 RDI: ffffffff8be28b40
RBP: ffff8880327ee540 R08: ffff88801dc4398f R09: 1ffff11003b88731
R10: dffffc0000000000 R11: ffffed1003b88732 R12: 0000000000000002
R13: 0000000000000002 R14: ffffffff8e13eda0 R15: ffff8880327eda00
rcu_lock_release include/linux/rcupdate.h:341 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
__page_table_check_zero+0x406/0x530 mm/page_table_check.c:145
page_table_check_free include/linux/page_table_check.h:43 [inline]
free_pages_prepare mm/page_alloc.c:1249 [inline]
__free_frozen_pages+0xc84/0xe70 mm/page_alloc.c:2706
__slab_free+0x326/0x400 mm/slub.c:4554
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4249
__alloc_skb+0x112/0x2d0 net/core/skbuff.c:660
alloc_skb include/linux/skbuff.h:1336 [inline]
alloc_skb_with_frags+0xca/0x890 net/core/skbuff.c:6665
sock_alloc_send_pskb+0x857/0x990 net/core/sock.c:2999
unix_dgram_sendmsg+0x4f6/0x1870 net/unix/af_unix.c:2072
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x219/0x270 net/socket.c:727
sock_write_iter+0x258/0x330 net/socket.c:1131
io_write+0xb33/0x1700 io_uring/rw.c:1160
__io_issue_sqe+0x17e/0x4b0 io_uring/io_uring.c:1738
io_issue_sqe+0x165/0xfd0 io_uring/io_uring.c:1761
io_queue_sqe io_uring/io_uring.c:1968 [inline]
io_req_task_submit+0x10b/0x1c0 io_uring/io_uring.c:1380
io_poll_task_func+0xc08/0xff0 io_uring/poll.c:-1
io_handle_tw_list+0x1f5/0x4c0 io_uring/io_uring.c:1067
tctx_task_work_run+0x99/0x370 io_uring/io_uring.c:1132
tctx_task_work+0x3f/0x90 io_uring/io_uring.c:1150
task_work_run+0x1d1/0x260 kernel/task_work.c:227
get_signal+0x11ed/0x1340 kernel/signal.c:2807
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efeb558e929
RSP: 002b:00007efeb63a9038 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000001000 RBX: 00007efeb57b6240 RCX: 00007efeb558e929
RDX: 0000000000003e80 RSI: 00000000000047ba RDI: 000000000000000e
RBP: 00007efeb5610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007efeb57b6240 R15: 00007efeb58dfa28
rcu: rcu_preempt kthread starved for 3417 jiffies! g67129 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:27224 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6785
preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108
irqentry_exit+0x6f/0x90 kernel/entry/common.c:307
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 3b bd fe 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000157988 EFLAGS: 00000206
RAX: 65cc21be39364a00 RBX: 0000000000000000 RCX: 65cc21be39364a00
RDX: 0000000000000001 RSI: ffffffff8db6f3d2 RDI: ffffffff8be28b40
RBP: ffffffff8b678291 R08: 0000000000000000 R09: ffffffff8b678291
R10: dffffc0000000000 R11: fffffbfff1f4221f R12: 0000000000000000
R13: ffffffff8dfface0 R14: 0000000000000001 R15: 0000000000000246
sched_submit_work kernel/sched/core.c:6819 [inline]
schedule+0xb1/0x360 kernel/sched/core.c:6877
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3f9/0x770 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 6.16.0-rc2-syzkaller-00269-g11313e2f7812 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 3b bd fe 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90000a07b38 EFLAGS: 00000206
RAX: c278231bcac5d000 RBX: 0000000000000000 RCX: c278231bcac5d000
RDX: 0000000000000000 RSI: ffffffff8db6f3d2 RDI: ffffffff8be28b40
RBP: ffffffff81729af5 R08: 0000000000000000 R09: ffffffff81729af5
R10: ffffc90000a07cf8 R11: ffffffff81acf690 R12: 0000000000000002
R13: ffffffff8e13eda0 R14: 0000000000000000 R15: 0000000000000246
FS: 0000000000000000(0000) GS:ffff888125d51000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e3cc178168 CR3: 0000000057f0a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000004144
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204
skb_clone+0x212/0x3a0 net/core/skbuff.c:2050
deliver_clone net/bridge/br_forward.c:125 [inline]
maybe_deliver+0x98/0x160 net/bridge/br_forward.c:190
br_flood+0x31a/0x6a0 net/bridge/br_forward.c:237
br_handle_frame_finish+0x14b4/0x19b0 net/bridge/br_input.c:221
br_nf_hook_thresh+0x3c6/0x4a0 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x948/0xd00 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:317 [inline]
br_nf_pre_routing_ipv6+0x37e/0x6b0 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:157 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:283 [inline]
br_handle_frame+0x982/0x14c0 net/bridge/br_input.c:434
__netif_receive_skb_core+0x10de/0x4180 net/core/dev.c:5863
__netif_receive_skb_one_core net/core/dev.c:5975 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6090
process_backlog+0x60e/0x14f0 net/core/dev.c:6442
__napi_poll+0xc7/0x480 net/core/dev.c:7414
napi_poll net/core/dev.c:7478 [inline]
net_rx_action+0x707/0xe30 net/core/dev.c:7605
handle_softirqs+0x286/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc 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 23 c6 21 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: 000002c6
RAX: c278231bcac5d000 RBX: ffffffff81975d58 RCX: c278231bcac5d000
RDX: 0000000000000001 RSI: ffffffff8d9826ab RDI: ffffffff8be28b40
RBP: ffffc90000197f20 R08: ffff8880b8732f5b R09: 1ffff110170e65eb
R10: dffffc0000000000 R11: ffffed10170e65ec R12: ffffffff8fa110f0
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003a57b40
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:749
default_idle_call+0x74/0xb0 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1e8/0x510 kernel/sched/idle.c:325
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:423
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x147
bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:d6:ef:fa:aa:18:85, vlan:0)