INFO: task syz.2.359:1477 blocked for more than 132 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.359 state:D stack:0 pid:1477 tgid:1477 ppid:291 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5996 [inline]
__schedule+0x134f/0x1ea0 kernel/sched/core.c:7843
__schedule_loop kernel/sched/core.c:7924 [inline]
schedule+0xc5/0x240 kernel/sched/core.c:7939
schedule_timeout+0xc7/0x3b0 kernel/time/timer.c:2596
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common+0x369/0x650 kernel/sched/completion.c:127
wait_for_completion+0x1c/0x40 kernel/sched/completion.c:148
rcu_barrier+0x415/0x540 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+0x398/0x420 arch/x86/kvm/x86.c:12961
kvm_destroy_vm virt/kvm/kvm_main.c:1355 [inline]
kvm_put_kvm+0xb04/0x12c0 virt/kvm/kvm_main.c:1392
kvm_vm_release+0x47/0x70 virt/kvm/kvm_main.c:1415
__fput+0x1fb/0xa00 fs/file_table.c:429
____fput+0x20/0x30 fs/file_table.c:457
task_work_run+0x1e5/0x260 kernel/task_work.c:246
resume_user_mode_work+0x35/0x50 include/linux/resume_user_mode.h:50
exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x63/0xb0 kernel/entry/common.c:218
do_syscall_64+0x63/0xf0 arch/x86/entry/common.c:84
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fa386d9bf79
RSP: 002b:00007ffdd9d43638 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffdd9d43720 RCX: 00007fa386d9bf79
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 0000000000017a98 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2df20000 R11: 0000000000000246 R12: 00007ffdd9d43760
R13: 00007fa387015fac R14: 0000000000018094 R15: 00007fa387015fa0
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 c4f3ed2acd38b8d794b4bc7267d0c0cbf9bd6dea
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2ba/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+0xdad/0xf00 kernel/hung_task.c:423
kthread+0x2c9/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
net_ratelimit: 119245 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:ca:2c:09:cd:45:8f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 33 Comm: rcuop/1 Not tainted syzkaller #0 c4f3ed2acd38b8d794b4bc7267d0c0cbf9bd6dea
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:stack_trace_consume_entry+0x41/0x2a0 kernel/stacktrace.c:86
Code: 00 00 00 00 00 fc ff df 4c 8d 47 10 4c 89 c3 48 c1 eb 03 0f b6 04 13 84 c0 0f 85 14 01 00 00 44 8b 57 10 4c 8d 4f 08 4d 89 cd <49> c1 ed 03 41 0f b6 44 15 00 84 c0 0f 85 2d 01 00 00 45 3b 11 73
RSP: 0018:ffffc90000006c10 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff92000000da6 RCX: 1ffff92000000d00
RDX: dffffc0000000000 RSI: ffffffff8175cb6a RDI: ffffc90000006d20
RBP: ffffc90000006c58 R08: ffffc90000006d30 R09: ffffc90000006d28
R10: 0000000000000000 R11: ffffffff8175cbd0 R12: ffff88810367a600
R13: ffffc90000006d28 R14: ffffffff8175cbd0 R15: ffffc90000006c68
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fecf4748700 CR3: 000000010c370000 CR4: 00000000003526b0
Call Trace:
arch_stack_walk+0x12c/0x170 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:49 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:565
unpoison_slab_object mm/kasan/common.c:321 [inline]
__kasan_slab_alloc+0x73/0x90 mm/kasan/common.c:347
kasan_slab_alloc include/linux/kasan.h:251 [inline]
slab_post_alloc_hook mm/slub.c:4202 [inline]
slab_alloc_node mm/slub.c:4251 [inline]
kmem_cache_alloc_noprof+0x1bf/0x410 mm/slub.c:4260
dst_alloc+0x13c/0x250 net/core/dst.c:89
rt_dst_alloc net/ipv4/route.c:1647 [inline]
ip_route_input_slow net/ipv4/route.c:2385 [inline]
ip_route_input_rcu+0x1a0e/0x2700 net/ipv4/route.c:2499
ip_route_input_noref+0xd4/0x150 net/ipv4/route.c:2510
arp_process+0x908/0x1790 net/ipv4/arp.c:840
NF_HOOK+0x17e/0x1e0 include/linux/netfilter.h:317
arp_rcv+0x2f8/0x490 net/ipv4/arp.c:991
__netif_receive_skb_one_core net/core/dev.c:5763 [inline]
__netif_receive_skb net/core/dev.c:5876 [inline]
netif_receive_skb_internal net/core/dev.c:5962 [inline]
netif_receive_skb+0x22a/0x7b0 net/core/dev.c:6021
br_netif_receive_skb net/bridge/br_input.c:30 [inline]
NF_HOOK include/linux/netfilter.h:317 [inline]
br_pass_frame_up+0x126/0x1b0 net/bridge/br_input.c:70
br_handle_frame_finish+0x1317/0x1760 net/bridge/br_input.c:221
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+0xfae/0x3ab0 net/core/dev.c:5657
__netif_receive_skb_one_core net/core/dev.c:5761 [inline]
__netif_receive_skb net/core/dev.c:5876 [inline]
process_backlog+0x3e5/0xad0 net/core/dev.c:6212
__napi_poll+0xd3/0x610 net/core/dev.c:6863
napi_poll net/core/dev.c:6932 [inline]
net_rx_action+0x5ea/0xd80 net/core/dev.c:7054
handle_softirqs+0x1aa/0x630 kernel/softirq.c:621
__do_softirq+0xf/0x16 kernel/softirq.c:659
do_softirq+0xb8/0x110 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+0x5d9/0xd40 kernel/rcu/tree.c:2594
nocb_cb_wait kernel/rcu/tree_nocb.h:923 [inline]
rcu_nocb_cb_kthread+0x524/0xb30 kernel/rcu/tree_nocb.h:957
kthread+0x2c9/0x370 kernel/kthread.c:389
ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
net_ratelimit: 113810 callbacks suppressed
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:00:00:00:00:67:5f, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:00:00:00:00:67:5f, vlan:0)