INFO: task dhcpcd:148 blocked for more than 122 seconds.
Not tainted 6.12.30-syzkaller-g5bbd30a60b96 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd state:D stack:0 pid:148 tgid:148 ppid:147 flags:0x00000000
Call Trace:
<TASK>
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 net/core/rtnetlink.c:79 [inline]
rtnl_dumpit+0xa1/0x240 net/core/rtnetlink.c:6537
netlink_dump+0x5e1/0xeb0 net/netlink/af_netlink.c:2312
netlink_recvmsg+0x677/0xdf0 net/netlink/af_netlink.c:1968
sock_recvmsg_nosec net/socket.c:1052 [inline]
sock_recvmsg+0x219/0x270 net/socket.c:1074
____sys_recvmsg+0x1ca/0x460 net/socket.c:2829
___sys_recvmsg+0x1b6/0x510 net/socket.c:2871
__sys_recvmsg net/socket.c:2901 [inline]
__do_sys_recvmsg net/socket.c:2911 [inline]
__se_sys_recvmsg net/socket.c:2908 [inline]
__x64_sys_recvmsg+0x1e8/0x2c0 net/socket.c:2908
x64_sys_call+0xdb5/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:48
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7ff31063a407
RSP: 002b:00007ffd273bc0c0 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007ff3105b0740 RCX: 00007ff31063a407
RDX: 0000000000000000 RSI: 00007ffd273bc150 RDI: 0000000000000016
RBP: 00007ffd273bc134 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000b44
R13: 00007ffd273bc140 R14: 00007ffd273bc230 R15: 0000000000000000
</TASK>
INFO: task kworker/u8:6:3122 blocked for more than 123 seconds.
Not tainted 6.12.30-syzkaller-g5bbd30a60b96 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:6 state:D stack:0 pid:3122 tgid:3122 ppid:2 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
<TASK>
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
</TASK>
INFO: task kworker/u8:10:3127 blocked for more than 125 seconds.
Not tainted 6.12.30-syzkaller-g5bbd30a60b96 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:10 state:D stack:0 pid:3127 tgid:3127 ppid:2 flags:0x00004000
Workqueue: events_unbound linkwatch_event
Call Trace:
<TASK>
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
</TASK>
INFO: task syz-executor:8409 blocked for more than 125 seconds.
Not tainted 6.12.30-syzkaller-g5bbd30a60b96 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:8409 tgid:8409 ppid:1 flags:0x00000004
Call Trace:
<TASK>
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 net/core/rtnetlink.c:79 [inline]
rtnetlink_rcv_msg+0x75f/0xa00 net/core/rtnetlink.c:6675
netlink_rcv_skb+0x22e/0x4a0 net/netlink/af_netlink.c:2537
rtnetlink_rcv+0x20/0x30 net/core/rtnetlink.c:6696
netlink_unicast_kernel net/netlink/af_netlink.c:1316 [inline]
netlink_unicast+0x8c6/0xa60 net/netlink/af_netlink.c:1342
netlink_sendmsg+0x7f0/0xaf0 net/netlink/af_netlink.c:1886
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x66d/0x6f0 net/socket.c:2217
__do_sys_sendto net/socket.c:2229 [inline]
__se_sys_sendto net/socket.c:2225 [inline]
__x64_sys_sendto+0xe9/0x100 net/socket.c:2225
x64_sys_call+0x2c2c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:45
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f784c990763
RSP: 002b:00007ffef90f4878 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f784d6e4620 RCX: 00007f784c990763
RDX: 0000000000000028 RSI: 00007f784d6e4670 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007ffef90f4894 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f784d6e4670 R15: 0000000000000000
</TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g5bbd30a60b96 #0 3d6f2d36d380480240f813e82e2a5ca54e02272f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
__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
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 46 Comm: kworker/u8:2 Not tainted 6.12.30-syzkaller-g5bbd30a60b96 #0 3d6f2d36d380480240f813e82e2a5ca54e02272f
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
RIP: 0010:stack_trace_consume_entry+0x11c/0x2a0 kernel/stacktrace.c:93
Code: 89 f8 48 c1 e8 03 80 3c 10 00 74 1e 4c 89 ff 49 89 d6 4d 89 c4 4c 89 cb e8 71 9a 67 00 49 89 d9 4d 89 e0 4c 89 f2 48 8b 75 c0 <49> 89 37 41 8b 18 41 0f b6 44 15 00 84 c0 0f 85 42 01 00 00 41 3b
RSP: 0018:ffffc90000006f50 EFLAGS: 00000246
RAX: 1ffff92000000e36 RBX: 1ffff92000000e0e RCX: 0000000000006f00
RDX: dffffc0000000000 RSI: ffffffff846a72c2 RDI: ffffc90000007060
RBP: ffffc90000006f98 R08: ffffc90000007070 R09: ffffc90000007068
R10: 000000000000001a R11: ffffffff81740900 R12: ffffc9000000706c
R13: 1ffff92000000e0d R14: ffffc900000070e0 R15: ffffc900000071b0
FS: 0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055629d7b3b98 CR3: 000000010b74e000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
arch_stack_walk+0x12a/0x170 arch/x86/kernel/stacktrace.c:27
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]
netif_receive_skb_internal net/core/dev.c:5956 [inline]
netif_receive_skb+0x147/0x7b0 net/core/dev.c:6015
br_netif_receive_skb net/bridge/br_input.c:30 [inline]
NF_HOOK include/linux/netfilter.h:317 [inline]
br_pass_frame_up+0x126/0x1c0 net/bridge/br_input.c:70
br_handle_frame_finish+0x12d9/0x1720 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+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: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
</IRQ>
<TASK>
__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]
addrconf_ifdown+0x608/0x1940 net/ipv6/addrconf.c:3956
addrconf_notify+0x17a/0xea0 net/ipv6/addrconf.c:-1
notifier_call_chain+0x10e/0x2c0 kernel/notifier.c:93
raw_notifier_call_chain+0x31/0x40 kernel/notifier.c:461
call_netdevice_notifiers_info net/core/dev.c:2067 [inline]
call_netdevice_notifiers_extack net/core/dev.c:2105 [inline]
call_netdevice_notifiers net/core/dev.c:2119 [inline]
unregister_netdevice_many_notify+0xe32/0x1bd0 net/core/dev.c:11485
unregister_netdevice_many net/core/dev.c:11547 [inline]
default_device_exit_batch+0x810/0x8a0 net/core/dev.c:12030
ops_exit_list net/core/net_namespace.c:178 [inline]
cleanup_net+0x731/0xc70 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
</TASK>
net_ratelimit: 94038 callbacks suppressed
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:f2:e6:76:cd:62:9b, 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 bridge_slave_0 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:1b, 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 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 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:aa:aa:aa:aa:aa:0c, vlan:0)