INFO: task syz.0.5593:16806 blocked for more than 126 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.5593 state:D stack:0 pid:16806 tgid:16806 ppid:15708 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5945 [inline]
__schedule+0x1322/0x1df0 kernel/sched/core.c:7791
__schedule_loop kernel/sched/core.c:7872 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7887
schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x359/0x630 kernel/sched/completion.c:127
wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
rcu_barrier+0x415/0x530 kernel/rcu/tree.c:4657
kvm_mmu_uninit_tdp_mmu+0x1df/0x210 arch/x86/kvm/mmu/tdp_mmu.c:51
kvm_mmu_uninit_vm+0x27/0x60 arch/x86/kvm/mmu/mmu.c:6572
kvm_arch_destroy_vm+0x383/0x410 arch/x86/kvm/x86.c:12898
kvm_destroy_vm virt/kvm/kvm_main.c:1355 [inline]
kvm_put_kvm+0xb04/0x12b0 virt/kvm/kvm_main.c:1391
kvm_vm_release+0x47/0x70 virt/kvm/kvm_main.c:1414
__fput+0x1fb/0xa00 fs/file_table.c:429
____fput+0x20/0x30 fs/file_table.c:457
task_work_run+0x1e3/0x250 kernel/task_work.c:240
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x9bc/0x2630 kernel/exit.c:953
do_group_exit+0x22a/0x300 kernel/exit.c:1095
get_signal+0x139d/0x14f0 kernel/signal.c:2933
arch_do_signal_or_restart+0x96/0x720 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:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f969798ebe9
RSP: 002b:00007fff06059158 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 0000000000057674 RCX: 00007f969798ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9697bc5fac
RBP: 0000000000000bea R08: 7fffffffffffffff R09: 0000000b0605944f
R10: 00007fff06059250 R11: 0000000000000246 R12: 00007f9697bc5fac
R13: 00007fff06059250 R14: 000000000005825e R15: 00007fff06059270
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 6e508aa732f414f9d300b832ff15c50b3cf7cfdc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:423
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 20 Comm: rcuop/0 Not tainted syzkaller #0 6e508aa732f414f9d300b832ff15c50b3cf7cfdc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:update_stack_state+0x3ae/0x4b0 arch/x86/kernel/unwind_frame.c:252
Code: 00 00 00 00 48 83 45 d0 08 eb 0c 48 83 e8 80 48 89 45 d0 4c 8b 6d c0 48 8b 45 90 42 80 3c 20 00 74 08 4c 89 ef e8 a2 e3 97 00 <65> 48 8b 04 25 00 eb 04 00 49 39 45 00 74 0e 48 8b 7d d0 e8 1a fc
RSP: 0018:ffffc9000022f558 EFLAGS: 00000246
RAX: 1ffff92000045eda RBX: ffffc9000022f6a8 RCX: ffffc9000022fa01
RDX: ffffc9000022f9f0 RSI: 1ffff92000045ed6 RDI: ffffc9000022f700
RBP: ffffc9000022f618 R08: ffffc9000022f770 R09: ffffc9000022f768
R10: 0000000000000000 R11: ffffffff81744330 R12: dffffc0000000000
R13: ffffc9000022f6d0 R14: ffffc9000022f700 R15: 1ffff92000045edd
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555569877350 CR3: 000000010b3ce000 CR4: 00000000003526b0
Call Trace:
unwind_next_frame+0x3c2/0x750 arch/x86/kernel/unwind_frame.c:315
arch_stack_walk+0x139/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9d/0xe0 kernel/stacktrace.c:122
save_stack+0xf8/0x1f0 mm/page_owner.c:174
__set_page_owner+0x8e/0x5d0 mm/page_owner.c:338
set_page_owner include/linux/page_owner.h:35 [inline]
post_alloc_hook+0x3b9/0x3f0 mm/page_alloc.c:1826
prep_new_page+0x1c/0x120 mm/page_alloc.c:1834
get_page_from_freelist+0x48ce/0x4960 mm/page_alloc.c:3914
__alloc_pages_noprof+0x31f/0x7b0 mm/page_alloc.c:5258
alloc_slab_page+0x6b/0x1f0 mm/slub.c:-1
allocate_slab+0x69/0x440 mm/slub.c:2660
new_slab mm/slub.c:2714 [inline]
___slab_alloc+0x59a/0x8b0 mm/slub.c:3902
__slab_alloc mm/slub.c:3992 [inline]
__slab_alloc_node mm/slub.c:4045 [inline]
slab_alloc_node mm/slub.c:4206 [inline]
kmem_cache_alloc_noprof+0x202/0x3a0 mm/slub.c:4227
skb_clone+0x229/0x460 net/core/skbuff.c:2082
dev_queue_xmit_nit+0x1ad/0xae0 net/core/dev.c:2386
xmit_one net/core/dev.c:3655 [inline]
dev_hard_start_xmit+0x187/0x770 net/core/dev.c:3678
__dev_queue_xmit+0x19cc/0x3790 net/core/dev.c:4514
dev_queue_xmit include/linux/netdevice.h:3141 [inline]
br_dev_queue_push_xmit+0x553/0x6d0 net/bridge/br_forward.c:53
NF_HOOK include/linux/netfilter.h:317 [inline]
br_forward_finish net/bridge/br_forward.c:66 [inline]
NF_HOOK include/linux/netfilter.h:317 [inline]
__br_forward+0x25c/0x390 net/bridge/br_forward.c:115
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver net/bridge/br_forward.c:190 [inline]
br_flood+0x50e/0x730 net/bridge/br_forward.c:236
br_handle_frame_finish+0x12bb/0x1720 net/bridge/br_input.c:215
nf_hook_bridge_pre net/bridge/br_input.c:301 [inline]
br_handle_frame+0x5a6/0xba0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xf48/0x3940 net/core/dev.c:5651
__netif_receive_skb_one_core net/core/dev.c:5755 [inline]
__netif_receive_skb net/core/dev.c:5870 [inline]
process_backlog+0x3e5/0xae0 net/core/dev.c:6206
__napi_poll+0xd3/0x610 net/core/dev.c:6857
napi_poll net/core/dev.c:6926 [inline]
net_rx_action+0x584/0xce0 net/core/dev.c:7048
handle_softirqs+0x1ab/0x630 kernel/softirq.c:621
__do_softirq+0xf/0x16 kernel/softirq.c:659
do_softirq+0xa6/0x100 kernel/softirq.c:503
__local_bh_enable_ip+0x74/0x80 kernel/softirq.c:430
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_do_batch+0x5c6/0xd20 kernel/rcu/tree.c:2594
nocb_cb_wait kernel/rcu/tree_nocb.h:923 [inline]
rcu_nocb_cb_kthread+0x4dc/0xac0 kernel/rcu/tree_nocb.h:957
kthread+0x2c7/0x370 kernel/kthread.c:389
ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
net_ratelimit: 103329 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:da:2a:11:b3:56:46, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)