INFO: task kworker/0:0:9 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-g21ed84930c16 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0 state:D stack:0 pid:9 tgid:9 ppid:2 flags:0x00004000
Workqueue: events key_garbage_collector
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
synchronize_rcu_expedited+0x6b0/0x7b0 kernel/rcu/tree_exp.h:991
synchronize_rcu+0x77/0x2e0 kernel/rcu/tree.c:4107
key_garbage_collector+0x88f/0xa00 security/keys/gc.c:297
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d5/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
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
INFO: task kworker/u8:0:12 blocked for more than 124 seconds.
Not tainted 6.12.30-syzkaller-g21ed84930c16 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:0 state:D stack:0 pid:12 tgid:12 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline]
synchronize_rcu_expedited+0x4ee/0x7b0 kernel/rcu/tree_exp.h:976
synchronize_net net/core/dev.c:11364 [inline]
dev_remove_pack+0x37/0x50 net/core/dev.c:659
tipc_detach_loopback+0x93/0x170 net/tipc/bearer.c:818
tipc_exit_net+0x79/0x150 net/tipc/core.c:111
ops_exit_list net/core/net_namespace.c:173 [inline]
cleanup_net+0x6aa/0xc70 net/core/net_namespace.c:642
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d5/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
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
INFO: task kworker/u8:1:13 blocked for more than 125 seconds.
Not tainted 6.12.30-syzkaller-g21ed84930c16 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1 state:D stack:0 pid:13 tgid:13 ppid:2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7928
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:788
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1119
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
rtnl_lock+0x19/0x20 net/core/rtnetlink.c:79
addrconf_verify_work+0x1d/0x50 net/ipv6/addrconf.c:4780
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d5/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
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
INFO: task kworker/u8:2:46 blocked for more than 126 seconds.
Not tainted 6.12.30-syzkaller-g21ed84930c16 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:2 state:D stack:0 pid:46 tgid:46 ppid:2 flags:0x00004000
Workqueue: events_unbound linkwatch_event
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7928
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:788
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1119
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
rtnl_lock+0x19/0x20 net/core/rtnetlink.c:79
linkwatch_event+0x12/0x60 net/core/link_watch.c:285
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d5/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
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
INFO: task syz.1.2600:7873 blocked for more than 126 seconds.
Not tainted 6.12.30-syzkaller-g21ed84930c16 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2600 state:D stack:0 pid:7873 tgid:7873 ppid:6822 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline]
synchronize_rcu_expedited+0x4ee/0x7b0 kernel/rcu/tree_exp.h:976
synchronize_net net/core/dev.c:11364 [inline]
unregister_netdevice_many_notify+0x84f/0x1bd0 net/core/dev.c:11468
unregister_netdevice_many net/core/dev.c:11547 [inline]
unregister_netdevice_queue+0x339/0x380 net/core/dev.c:11421
unregister_netdevice include/linux/netdevice.h:3165 [inline]
__tun_detach+0xca1/0x1460 drivers/net/tun.c:685
tun_detach drivers/net/tun.c:701 [inline]
tun_chr_close+0x93/0x150 drivers/net/tun.c:3517
__fput+0x1fb/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e3/0x250 kernel/task_work.c:240
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x9b4/0x2630 kernel/exit.c:944
do_group_exit+0x22a/0x300 kernel/exit.c:1094
get_signal+0x139d/0x14f0 kernel/signal.c:2934
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: 0033:0x7f6e27bc11e5
RSP: 002b:00007f6e2892ef80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f6e27db5fa0 RCX: 00007f6e27bc11e5
RDX: 00007f6e2892efc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f6e27c10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6e27db5fa0 R15: 00007fff3cc1ae78
INFO: task syz.4.2732:8344 blocked for more than 127 seconds.
Not tainted 6.12.30-syzkaller-g21ed84930c16 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2732 state:D stack:0 pid:8344 tgid:8344 ppid:7678 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7928
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:788
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1119
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
rtnl_lock+0x19/0x20 net/core/rtnetlink.c:79
tun_detach drivers/net/tun.c:698 [inline]
tun_chr_close+0x41/0x150 drivers/net/tun.c:3517
__fput+0x1fb/0xa00 fs/file_table.c:431
____fput+0x20/0x30 fs/file_table.c:459
task_work_run+0x1e3/0x250 kernel/task_work.c:240
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x9b4/0x2630 kernel/exit.c:944
do_group_exit+0x22a/0x300 kernel/exit.c:1094
get_signal+0x139d/0x14f0 kernel/signal.c:2934
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: 0033:0x7f7029bc11e5
RSP: 002b:00007f702aa81f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f7029db5fa0 RCX: 00007f7029bc11e5
RDX: 00007f702aa81fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7029c10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7029db5fa0 R15: 00007ffe85ef0ee8
INFO: task syz-executor:9235 blocked for more than 128 seconds.
Not tainted 6.12.30-syzkaller-g21ed84930c16 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:9235 tgid:9235 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5947 [inline]
__schedule+0x132b/0x1e00 kernel/sched/core.c:7775
__schedule_loop kernel/sched/core.c:7856 [inline]
schedule+0xc6/0x240 kernel/sched/core.c:7871
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:7928
__mutex_lock_common kernel/locking/mutex.c:692 [inline]
__mutex_lock+0x81e/0x1b50 kernel/locking/mutex.c:788
__mutex_lock_slowpath+0xe/0x20 kernel/locking/mutex.c:1119
mutex_lock+0x102/0x1c0 kernel/locking/mutex.c:270
exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
synchronize_rcu_expedited+0x288/0x7b0 kernel/rcu/tree_exp.h:976
namespace_unlock+0x1ec/0x3d0 fs/namespace.c:1704
drop_collected_mounts fs/namespace.c:2232 [inline]
put_mnt_ns+0xad/0xf0 fs/namespace.c:5578
free_nsproxy+0x52/0x290 kernel/nsproxy.c:193
put_nsproxy include/linux/nsproxy.h:118 [inline]
switch_task_namespaces kernel/nsproxy.c:251 [inline]
exit_task_namespaces+0x99/0xe0 kernel/nsproxy.c:256
do_exit+0x9af/0x2630 kernel/exit.c:943
do_group_exit+0x22a/0x300 kernel/exit.c:1094
get_signal+0x139d/0x14f0 kernel/signal.c:2934
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: 0033:0x7fc30ad9081a
RSP: 002b:00007ffcd8322b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: 0000000000000000 RBX: 00007ffcd8322bf0 RCX: 00007fc30ad9081a
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000558 R09: 0079746972756365
R10: 00007fc30af81a60 R11: 0000000000000206 R12: 00007fc30af81a00
R13: 00007ffcd8322b8c R14: 0000000000000000 R15: 00007fc30af82e40
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g21ed84930c16 #0 fa4558fba7fa11aa57b2c84caea5bf67b39b1b5f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/19/2025
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:229 [inline]
watchdog+0xd8f/0xed0 kernel/hung_task.c:385
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.12.30-syzkaller-g21ed84930c16 #0 fa4558fba7fa11aa57b2c84caea5bf67b39b1b5f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/19/2025
Workqueue: mld mld_query_work
RIP: 0010:update_stack_state+0x207/0x4b0 arch/x86/kernel/unwind_frame.c:229
Code: 75 17 48 8b 8d 78 ff ff ff 4c 39 f9 0f 97 c0 4c 39 f1 0f 96 c1 84 c8 75 6e 49 bd 00 00 00 00 00 fc ff df 48 8b 85 68 ff ff ff <42> 80 3c 28 00 48 8b 9d 58 ff ff ff 74 08 48 89 df e8 23 ae 97 00
RSP: 0018:ffffc90000007418 EFLAGS: 00000297
RAX: 1ffff92000000eb0 RBX: ffffc90000007568 RCX: 1ffff92000000e01
RDX: ffffc900000a7ae8 RSI: 1ffff92000000eae RDI: ffffc900000075c0
RBP: ffffc900000074d8 R08: ffffc90000007630 R09: ffffc90000007628
R10: 000000000000000e R11: ffffffff81740900 R12: ffffc90000007568
R13: dffffc0000000000 R14: ffffc90000008000 R15: ffffc90000000000
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559140335b90 CR3: 00000000072a8000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x4a/0x60 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2413 [inline]
slab_free mm/slub.c:4662 [inline]
kmem_cache_free+0x1c1/0x510 mm/slub.c:4769
kfree_skbmem net/core/skbuff.c:-1 [inline]
__kfree_skb+0x18f/0x210 net/core/skbuff.c:1215
sk_skb_reason_drop+0xd8/0x310 net/core/skbuff.c:1252
kfree_skb_reason include/linux/skbuff.h:1271 [inline]
kfree_skb include/linux/skbuff.h:1280 [inline]
ip6_mc_input+0x4f3/0x670 net/ipv6/ip6_input.c:587
dst_input include/net/dst.h:469 [inline]
ip6_rcv_finish+0x344/0x3c0 net/ipv6/ip6_input.c:79
NF_HOOK include/linux/netfilter.h:317 [inline]
ipv6_rcv+0xed/0x220 net/ipv6/ip6_input.c:309
__netif_receive_skb_one_core net/core/dev.c:5757 [inline]
__netif_receive_skb net/core/dev.c:5870 [inline]
process_backlog+0x44b/0xae0 net/core/dev.c:6202
__napi_poll+0xd0/0x610 net/core/dev.c:6853
napi_poll net/core/dev.c:6922 [inline]
net_rx_action+0x584/0xce0 net/core/dev.c:7044
handle_softirqs+0x1ae/0x630 kernel/softirq.c:603
__do_softirq+0xf/0x16 kernel/softirq.c:641
do_softirq+0xa6/0x100 kernel/softirq.c:485
__local_bh_enable_ip+0x74/0x80 kernel/softirq.c:412
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
_raw_spin_unlock_bh+0x54/0x60 kernel/locking/spinlock.c:210
spin_unlock_bh include/linux/spinlock.h:396 [inline]
mld_query_work+0x951/0x2c10 net/ipv6/mcast.c:1529
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0x7d5/0x1020 kernel/workqueue.c:3319
worker_thread+0xc58/0x1250 kernel/workqueue.c:3400
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: 138949 callbacks suppressed
bridge0: received packet on bridge_slave_0 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:0a:10:d0:6b:8b:c5, 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 bridge_slave_0 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:0a:10:d0:6b:8b:c5, 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: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 bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)