INFO: task kworker/u8:2:35 blocked for more than 143 seconds.
      Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:2    state:D stack:22720 pid:35    tgid:35    ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe5a/0x5ae0 kernel/sched/core.c:6756
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
 addrconf_dad_work+0xcf/0x14d0 net/ipv6/addrconf.c:4196
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task kworker/u8:15:10292 blocked for more than 143 seconds.
      Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:15   state:D stack:23952 pid:10292 tgid:10292 ppid:2      flags:0x00004000
Workqueue: events_unbound linkwatch_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe5a/0x5ae0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
 __mutex_lock_common kernel/locking/mutex.c:665 [inline]
 __mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
 linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz.0.7658:32450 blocked for more than 143 seconds.
      Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.7658      state:D stack:22576 pid:32450 tgid:32449 ppid:5828   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe5a/0x5ae0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
 __mutex_lock_common kernel/locking/mutex.c:665 [inline]
 __mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
 team_port_change_check drivers/net/team/team_core.c:2949 [inline]
 team_device_event+0x2c7/0x770 drivers/net/team/team_core.c:2972
 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8982
 dev_change_flags+0x10c/0x160 net/core/dev.c:9020
 vlan_device_event+0xdfc/0x2120 net/8021q/vlan.c:468
 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 dev_open net/core/dev.c:1517 [inline]
 dev_open+0x144/0x160 net/core/dev.c:1505
 team_port_add drivers/net/team/team_core.c:1216 [inline]
 team_add_slave+0xacd/0x20e0 drivers/net/team/team_core.c:1975
 do_set_master+0x1bc/0x230 net/core/rtnetlink.c:2911
 do_setlink.constprop.0+0xb60/0x3f70 net/core/rtnetlink.c:3110
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg net/socket.c:726 [inline]
 ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2583
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RSP: 002b:00007ff889ba7038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff888f35fa0 RCX: 00007ff888d7e819
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006
RBP: 00007ff888df175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff888f35fa0 R15: 00007ffeba6c6878
 </TASK>
INFO: task syz.4.7660:32460 blocked for more than 144 seconds.
 <TASK>
Workqueue[ 1856.859040][   T30]  rtnl_lock net/core/rtnetlink.c:79 [inline]
Workqueue[ 1856.859040][   T30]  rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6917
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
RSP: 002b:00007fe9729b2038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
 </TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe5a/0x5ae0 kernel/sched/core.c:6756
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
 rtnl_newlink+0x5d0/0x1c50 net/core/rtnetlink.c:4000
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1e7077e819
RSP: 002b:00007f1e714dd038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1e70935fa0 RCX: 00007f1e7077e819
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 00007f1e707f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1e70935fa0 R15: 00007ffd47587938
 </TASK>
INFO: task syz.1.7668:32480 blocked for more than 145 seconds.
      Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
 __sys_sendmsg+0x16e/0x220 net/socket.c:2669
RIP: 0033:0x7f1e7077e819
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe5a/0x5ae0 kernel/sched/core.c:6756
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
 rtnl_newlink+0x5d0/0x1c50 net/core/rtnetlink.c:4000
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
 <TASK>
 rtnetlink_rcv_msg+0x95b/0xea0 net/core/rtnetlink.c:6911
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3f1137e819
RSP: 002b:00007f3f121d3038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3f11536080 RCX: 00007f3f1137e819
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000004
RBP: 00007f3f113f175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3f11536080 R15: 00007ffd01537c78
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xf0c/0x1240 kernel/hung_task.c:379
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31510 Comm: kworker/u8:3 Not tainted 6.12.0-syzkaller-07749-g28eb75e178d3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:752 [inline]
RIP: 0010:batadv_iv_ogm_schedule_buff+0x575/0x14d0 net/batman-adv/bat_iv_ogm.c:825
Code: e0 48 89 44 24 18 48 8b 44 24 48 48 c1 e8 03 4c 01 e0 48 89 44 24 20 e8 29 74 ab f6 48 8b 44 24 18 80 38 00 0f 85 b6 0d 00 00 <48> 8b 74 24 08 44 89 f0 48 8b 16 48 8d 1c c2 e8 57 fa 90 f6 45 31
RSP: 0018:ffffc90004b1fb60 EFLAGS: 00000246
RAX: ffffed100674e378 RBX: 0000000000000400 RCX: ffffffff8ae2c16c
RDX: ffff88803034a440 RSI: ffffffff8ae2bf47 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000004 R09: 00000000000002e8
R10: 0000000000000400 R11: 000000003eebce57 R12: dffffc0000000000
R13: ffff88806217cd80 R14: 00000000000002e8 R15: ffff888033a71bc0
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a10daab0a8 CR3: 000000000df7e000 CR4: 00000000003526f0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:868 [inline]
 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:861 [inline]
 batadv_iv_send_outstanding_bat_ogm_packet+0x31e/0x8d0 net/batman-adv/bat_iv_ogm.c:1712
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>