INFO: task kworker/0:6:1911 blocked for more than 123 seconds.
Not tainted 6.12.38-syzkaller-gbf0fb8bb181b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:6 state:D stack:0 pid:1911 tgid:1911 ppid:2 flags:0x00004000
Workqueue: events xfrm_state_gc_task
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_state+0x19/0x40 kernel/sched/completion.c:264
__wait_rcu_gp+0x296/0x2c0 kernel/rcu/update.c:514
synchronize_rcu_normal+0x113/0x160 kernel/rcu/tree.c:4043
synchronize_rcu+0x98/0x2e0 kernel/rcu/tree.c:4121
xfrm_state_gc_task+0xca/0x170 net/xfrm/xfrm_state.c:569
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d2/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
kthread+0x2ca/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
INFO: task syz.0.5405:11214 blocked for more than 125 seconds.
Not tainted 6.12.38-syzkaller-gbf0fb8bb181b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.5405 state:D stack:0 pid:11214 tgid:11214 ppid:470 flags:0x00004004
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+0x1e0/0x250 kernel/task_work.c:240
resume_user_mode_work+0x36/0x50 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+0x64/0xb0 kernel/entry/common.c:218
do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fd314f8eb69
RSP: 002b:00007ffc373d71e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000002ed52 RCX: 00007fd314f8eb69
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd3151b7ba0 R08: 0000000000000001 R09: 00000003373d74df
R10: 00007fd314e00000 R11: 0000000000000246 R12: 00007fd3151b608c
R13: 00007fd3151b6080 R14: ffffffffffffffff R15: 00007ffc373d7300
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.38-syzkaller-gbf0fb8bb181b #0 d02c7cfa86e34ad1734bbfdc1f5f1c3ce9be47fc
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+0x2ca/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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 20 Comm: rcuop/0 Not tainted 6.12.38-syzkaller-gbf0fb8bb181b #0 d02c7cfa86e34ad1734bbfdc1f5f1c3ce9be47fc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x33/0x90 kernel/kcov.c:300
Code: 8b 45 08 65 48 8b 14 25 80 e9 04 00 65 8b 0d ec 1a 7f 7e 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba ec 0b 00 00 00 <74> 52 8b 8a c8 0b 00 00 83 f9 03 75 47 48 8b 8a d0 0b 00 00 44 8b
RSP: 0018:ffffc9000022ffb0 EFLAGS: 00000246
RAX: ffffffff84f544b0 RBX: 000000000000003a RCX: 0000000000000100
RDX: ffff888103660000 RSI: 000000000000003a RDI: 0000000000000000
RBP: ffffc9000022ffb0 R08: ffff888103660000 R09: 0000000000000002
R10: 000000000000dd86 R11: 0000000000000100 R12: dffffc0000000000
R13: 0000000000000010 R14: ffff888172509a00 R15: ffff88811dd69f80
FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd42e84f068 CR3: 000000010aa5c000 CR4: 00000000003526b0
Call Trace:
ipv6_mc_check_exthdrs net/ipv6/mcast_snoop.c:46 [inline]
ipv6_mc_check_mld+0x330/0x2070 net/ipv6/mcast_snoop.c:180
br_multicast_ipv6_rcv net/bridge/br_multicast.c:3949 [inline]
br_multicast_rcv+0x576/0x7af0 net/bridge/br_multicast.c:4033
br_handle_frame_finish+0x5be/0x1720 net/bridge/br_input.c:153
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+0xd0/0x610 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+0x2ca/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: 294079 callbacks suppressed
bridge0: received packet on ªªªªª$ with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on ªªªªª$ with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:7b:09:6b:10:94, vlan:0)
bridge0: received packet on ªªªªª$ with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on ªªªªª$ with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on ªªªªª$ with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on ªªªªª$ with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)