[syzbot] [net?] INFO: task hung in netlink_dump (5)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 43db1e03c086 Merge tag 'for-6.10/dm-fixes-2' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=109e2c31980000
kernel config: https://syzkaller.appspot.com/x/.config?x=3456bae478301dc8
dashboard link: https://syzkaller.appspot.com/bug?extid=7937cbec3c095875f389
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2d56c55ecb57/disk-43db1e03.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/dcec4d04848d/vmlinux-43db1e03.xz
kernel image: https://storage.googleapis.com/syzbot-assets/59fa15daa99c/bzImage-43db1e03.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7937cb...@syzkaller.appspotmail.com

INFO: task dhcpcd:4748 blocked for more than 143 seconds.
Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd state:D
stack:23352 pid:4748 tgid:4748 ppid:4747 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
netlink_dump+0x58c/0xe00 net/netlink/af_netlink.c:2336
__netlink_dump_start+0x6d7/0x9b0 net/netlink/af_netlink.c:2454
netlink_dump_start include/linux/netlink.h:340 [inline]
rtnetlink_dump_start net/core/rtnetlink.c:6524 [inline]
rtnetlink_rcv_msg+0xb40/0xea0 net/core/rtnetlink.c:6591
netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2564
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x47f/0x4e0 net/socket.c:2192
__do_sys_sendto net/socket.c:2204 [inline]
__se_sys_sendto net/socket.c:2200 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200
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: 0033:0x7f3fbe777ad7
RSP: 002b:00007ffc66505068 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007ffc66506190 RCX: 00007f3fbe777ad7
RDX: 0000000000000014 RSI: 00007ffc665060b0 RDI: 0000000000000019
RBP: 00007ffc66506120 R08: 00007ffc66506094 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000012
R13: 00007ffc66506094 R14: 00007ffc665060b0 R15: 0000000000000105
</TASK>
INFO: task udevd:10063 blocked for more than 144 seconds.
Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:25680 pid:10063 tgid:10063 ppid:4534 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
device_lock include/linux/device.h:1009 [inline]
uevent_show+0x188/0x3b0 drivers/base/core.c:2743
dev_attr_show+0x53/0xe0 drivers/base/core.c:2437
sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59
seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230
kernfs_fop_read_iter+0x41a/0x590 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x869/0xbd0 fs/read_write.c:476
ksys_read+0x12f/0x260 fs/read_write.c:619
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: 0033:0x7fa24d716b6a
RSP: 002b:00007ffde3d9d1d8 EFLAGS: 00000246
ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055b4c4e12080 RCX: 00007fa24d716b6a
RDX: 0000000000001000 RSI: 000055b4c4e13960 RDI: 0000000000000008
RBP: 000055b4c4e12080 R08: 0000000000000008 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffde3d9d6b8 R15: 000000000000000a
</TASK>
INFO: task syz-executor:13215 blocked for more than 145 seconds.
Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D
stack:24880 pid:13215 tgid:13215 ppid:1 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3de/0x5f0 kernel/sched/completion.c:116
__flush_work+0x5bd/0xc60 kernel/workqueue.c:4227
flush_all_backlogs net/core/dev.c:6000 [inline]
unregister_netdevice_many_notify+0x12c1/0x19f0 net/core/dev.c:11201
unregister_netdevice_many net/core/dev.c:11277 [inline]
unregister_netdevice_queue+0x307/0x3f0 net/core/dev.c:11156
bpq_device_event+0x76e/0xaf0 drivers/net/hamradio/bpqether.c:552
notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1992
call_netdevice_notifiers_extack net/core/dev.c:2030 [inline]
call_netdevice_notifiers net/core/dev.c:2044 [inline]
unregister_netdevice_many_notify+0x8a1/0x19f0 net/core/dev.c:11219
unregister_netdevice_many net/core/dev.c:11277 [inline]
unregister_netdevice_queue+0x307/0x3f0 net/core/dev.c:11156
unregister_netdevice include/linux/netdevice.h:3119 [inline]
nsim_destroy+0x107/0x6a0 drivers/net/netdevsim/netdev.c:778
__nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1425
nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1437 [inline]
nsim_dev_reload_destroy+0x108/0x4d0 drivers/net/netdevsim/dev.c:1658
nsim_drv_remove+0x52/0x1d0 drivers/net/netdevsim/dev.c:1673
device_remove+0xc8/0x170 drivers/base/dd.c:566
__device_release_driver drivers/base/dd.c:1270 [inline]
device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1293
bus_remove_device+0x22f/0x420 drivers/base/bus.c:574
device_del+0x396/0x9f0 drivers/base/core.c:3868
device_unregister+0x1d/0xc0 drivers/base/core.c:3909
nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline]
del_device_store+0x346/0x4b0 drivers/net/netdevsim/bus.c:226
bus_attr_store+0x76/0xa0 drivers/base/bus.c:170
sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:136
kernfs_fop_write_iter+0x343/0x500 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0x6b6/0x1140 fs/read_write.c:590
ksys_write+0x12f/0x260 fs/read_write.c:643
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: 0033:0x7fef1e17475f
RSP: 002b:00007ffccf96fe80 EFLAGS: 00000293
ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fef1e17475f
RDX: 0000000000000001 RSI: 00007ffccf96fed0 RDI: 0000000000000005
RBP: 00007fef1e1e45a0 R08: 0000000000000000 R09: 00007ffccf96fcd7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffccf96fed0 R14: 00007fef1ee34620 R15: 0000000000000003
</TASK>
INFO: task syz.2.2136:13517 blocked for more than 146 seconds.
Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2136 state:D
stack:28384 pid:13517 tgid:13516 ppid:11206 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
rtnl_lock net/core/rtnetlink.c:79 [inline]
rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2564
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0xab5/0xc90 net/socket.c:2585
___sys_sendmsg+0x135/0x1e0 net/socket.c:2639
__sys_sendmsg+0x117/0x1f0 net/socket.c:2668
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: 0033:0x7f1dbcf75bd9
RSP: 002b:00007f1dbdd0e048 EFLAGS: 00000246
ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f1dbd103f60 RCX: 00007f1dbcf75bd9
RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003
RBP: 00007f1dbcfe4e60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1dbd103f60 R15: 00007ffda3b34608
</TASK>

Showing all locks held in the system:
3 locks held by kworker/0:0/8:
#0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223
#1: ffffc900000d7d80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224
#2: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
1 lock held by khungtaskd/30:
#0:
ffffffff8dbb1620
(
rcu_read_lock
){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
6 locks held by kworker/1:1/51:
3 locks held by kworker/u8:7/2410:
#0:
ffff888029db3148
((wq_completion)ipv6_addrconf
){+.+.}-{0:0}
, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223
#1:
ffffc900095f7d80
((work_completion)(&(&net->ipv6.addr_chk_work)->work)
){+.+.}-{0:0}
, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224
#2:
ffffffff8f74bd28
(rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4733
5 locks held by kworker/u8:8/2423:
2 locks held by kworker/u8:10/4360:
#0: ffff8880b923ebd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:567 [inline]
#0: ffff8880b923ebd8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:552
#1:
ffff8880b9228a08
(
&per_cpu_ptr(group->pcpu, cpu)->seq
){-.-.}-{0:0}
, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988
2 locks held by dhcpcd/4748:
#0:
ffff888023574678 (
nlk_cb_mutex-ROUTE
){+.+.}-{3:3}
, at: __netlink_dump_start+0x154/0x9b0 net/netlink/af_netlink.c:2418
#1:
ffffffff8f74bd28
(
rtnl_mutex
){+.+.}-{3:3}
, at: netlink_dump+0x58c/0xe00 net/netlink/af_netlink.c:2336
2 locks held by getty/4840:
#0:
ffff88802aa330a0
(
&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1:
ffffc90002f062f0 (
&ldata->atomic_read_lock
){+.+.}-{3:3}
, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:6/5142:
#0:
ffff888015481948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3223
#1:
ffffc9000326fd80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3224
#2: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x7d/0x10e0 net/wireless/reg.c:2478
4 locks held by udevd/10063:
#0: ffff888059eb3b08 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff888075355088 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88805a45ad28
(
kn->active
#5
){++++}-{0:0}
, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3:
ffff88801b2ae190
(&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
(&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
8 locks held by syz-executor/13215:
#0:
ffff88802f3d2420
(sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:643
#1:
ffff88806c13c888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x281/0x500 fs/kernfs/file.c:325
#2: ffff8880221123c8 (kn->active#49){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a4/0x500 fs/kernfs/file.c:326
#3:
ffffffff8ed86da8
(
nsim_bus_dev_list_lock
){+.+.}-{3:3}
, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
#4:
ffff88807b20e0e8
(
&dev->mutex
){....}-{3:3}
, at: device_lock include/linux/device.h:1009 [inline]
, at: __device_driver_lock drivers/base/dd.c:1093 [inline]
, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1290
#5: ffff88807b208250 (&devlink->lock_key#29){+.+.}-{3:3}, at: nsim_drv_remove+0x4a/0x1d0 drivers/net/netdevsim/dev.c:1672
#6: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x6f/0x6a0 drivers/net/netdevsim/netdev.c:773
#7: ffffffff8da555d0 (cpu_hotplug_lock){++++}-{0:0}, at: flush_all_backlogs net/core/dev.c:5984 [inline]
#7: ffffffff8da555d0 (cpu_hotplug_lock){++++}-{0:0}, at: unregister_netdevice_many_notify+0x531/0x19f0 net/core/dev.c:11201
8 locks held by syz.1.2133/13507:
1 lock held by syz.2.2136/13517:
#0: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz.4.2137/13520:
#0:
ffffffff8f74bd28
(
rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz.4.2137/13521:
#0:
ffffffff8f74bd28
(
rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13523:
#0:
ffffffff8f74bd28
(
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13527:
#0:
ffffffff8f74bd28
(
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13530:
#0:
ffffffff8f74bd28
(
rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13533:
#0: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13536:
#0: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13539:
#0:
ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13542:
#0:
ffffffff8f74bd28
(
rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13545:
#0:
ffffffff8f74bd28
(rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
(rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13548:
#0:
ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13551:
#0:
ffffffff8f74bd28
(
rtnl_mutex
){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13554:
#0:
ffffffff8f74bd28
(rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
(rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13557:
#0:
ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13560:
#0: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f74bd28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13563:
#0:
ffffffff8f74bd28
(
rtnl_mutex
){+.+.}-{3:3}
, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6632

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
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+0xf86/0x1240 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:
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
NMI backtrace for cpu 1
CPU: 1 PID: 13507 Comm: syz.1.2133 Not tainted 6.10.0-rc7-syzkaller-00141-g43db1e03c086 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:number+0x172/0xb80 lib/vsprintf.c:473
Code: e0 b4 f6 8b 44 24 70 31 ff 89 44 24 08 c1 f8 08 89 44 24 18 0f bf 44 24 76 89 44 24 30 44 89 f8 83 e0 20 88 44 24 36 44 89 f8 <83> e0 02 89 c5 89 c6 88 44 24 1f e8 1e db b4 f6 40 84 ed 0f 85 8f
RSP: 0018:ffffc90000a17978 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc90000a17d51 RCX: ffffffff8ad9043a
RDX: ffff888024ebbc00 RSI: ffffffff8ad9046b RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 00000000001c1748 R12: ffffffff8b2d8445
R13: 000000000000000a R14: ffffc90080a17d4f R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556f0c3808 CR3: 000000000d97a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
vsnprintf+0x92a/0x1880 lib/vsprintf.c:2890
sprintf+0xcd/0x110 lib/vsprintf.c:3028
print_time kernel/printk/printk.c:1330 [inline]
info_print_prefix+0x25c/0x350 kernel/printk/printk.c:1356
record_print_text+0x141/0x400 kernel/printk/printk.c:1405
printk_get_next_message+0x2a6/0x670 kernel/printk/printk.c:2840
console_emit_next_record kernel/printk/printk.c:2880 [inline]
console_flush_all+0x3b2/0xd70 kernel/printk/printk.c:2979
console_unlock+0xae/0x290 kernel/printk/printk.c:3048
vprintk_emit kernel/printk/printk.c:2348 [inline]
vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2303
dev_vprintk_emit drivers/base/core.c:4909 [inline]
dev_printk_emit+0xfb/0x140 drivers/base/core.c:4920
__dev_printk+0xf5/0x270 drivers/base/core.c:4932
_dev_err+0xe5/0x120 drivers/base/core.c:4975
urb_irq_callback+0x454/0x700 drivers/input/misc/yealink.c:416
__usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
dummy_timer+0x17f6/0x3900 drivers/usb/gadget/udc/dummy_hcd.c:1987
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1815
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:memset_orig+0x3a/0xb0 arch/x86/lib/memset_64.S:69
Code: 01 01 01 01 01 48 0f af c1 41 89 f9 41 83 e1 07 75 70 48 89 d1 48 c1 e9 06 74 35 0f 1f 44 00 00 48 ff c9 48 89 07 48 89 47 08 <48> 89 47 10 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89
RSP: 0018:ffffc90000a18968 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 0000000000000280 RCX: 0000000000000005
RDX: 0000000000000280 RSI: 0000000000000000 RDI: ffff88806eec0400
RBP: ffffc90000a189c0 R08: 0000000000000007 R09: 0000000000000000
R10: ffff88806eec0300 R11: 0000000000000006 R12: 0000000000082820
R13: 00000000ffffffff R14: 0000000000000001 R15: ffff8880192a5a00
slab_post_alloc_hook mm/slub.c:3943 [inline]
slab_alloc_node mm/slub.c:4002 [inline]
kmem_cache_alloc_node_noprof+0x16e/0x310 mm/slub.c:4045
kmalloc_reserve+0x18b/0x2c0 net/core/skbuff.c:575
__alloc_skb+0x164/0x380 net/core/skbuff.c:666
skb_copy+0x17a/0x340 net/core/skbuff.c:2124
mac80211_hwsim_tx_frame_no_nl.isra.0+0xb97/0x1310 drivers/net/wireless/virtual/mac80211_hwsim.c:1857
mac80211_hwsim_tx_frame+0x1eb/0x2a0 drivers/net/wireless/virtual/mac80211_hwsim.c:2206
__mac80211_hwsim_beacon_tx drivers/net/wireless/virtual/mac80211_hwsim.c:2223 [inline]
mac80211_hwsim_beacon_tx+0x592/0xa00 drivers/net/wireless/virtual/mac80211_hwsim.c:2306
__iterate_interfaces+0x2d2/0x580 net/mac80211/util.c:772
ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 net/mac80211/util.c:808
mac80211_hwsim_beacon+0x105/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2336
__run_hrtimer kernel/time/hrtimer.c:1689 [inline]
__hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1753
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1770
handle_softirqs+0x216/0x8f0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x1f2/0x560 kernel/locking/lockdep.c:5722
Code: c1 05 da ac 96 7e 83 f8 01 0f 85 ea 02 00 00 9c 58 f6 c4 02 0f 85 d5 02 00 00 48 85 ed 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc9000353f548 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920006a7eab RCX: 00000000092c356c
RDX: 0000000000000001 RSI: ffffffff8b2cb200 RDI: ffffffff8b903940
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff284d858
R10: ffffffff9426c2c7 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8dbb1620 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
__lruvec_stat_mod_folio+0xb4/0x260 mm/memcontrol.c:1061
__folio_remove_rmap mm/rmap.c:1556 [inline]
folio_remove_rmap_ptes+0x363/0x400 mm/rmap.c:1595
zap_present_folio_ptes mm/memory.c:1505 [inline]
zap_present_ptes mm/memory.c:1564 [inline]
zap_pte_range mm/memory.c:1606 [inline]
zap_pmd_range mm/memory.c:1724 [inline]
zap_pud_range mm/memory.c:1753 [inline]
zap_p4d_range mm/memory.c:1774 [inline]
unmap_page_range+0x1a0b/0x3f20 mm/memory.c:1795
unmap_single_vma+0x194/0x2b0 mm/memory.c:1841
unmap_vmas+0x22f/0x490 mm/memory.c:1885
exit_mmap+0x1b8/0xb20 mm/mmap.c:3341
__mmput+0x12a/0x4d0 kernel/fork.c:1346
mmput+0x62/0x70 kernel/fork.c:1368
exit_mm kernel/exit.c:567 [inline]
do_exit+0x9b7/0x2ba0 kernel/exit.c:863
do_group_exit+0xd3/0x2a0 kernel/exit.c:1025
get_signal+0x2616/0x2710 kernel/signal.c:2909
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
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+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5e31d75bd9
Code: Unable to access opcode bytes at 0x7f5e31d75baf.
RSP: 002b:00007ffda528d268 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00007f5e31d75bd9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f5e31f03f68
RBP: 0000000000000c03 R08: 0000000000000008 R09: 00000004a528d58f
R10: 00007f5e31c00000 R11: 0000000000000246 R12: 00007f5e31f03f6c
R13: 0000000000000000 R14: 00007f5e31f03f60 R15: 00007f5e31f03f60
</TASK>
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71
yealink 5-1:36.0: urb_irq_callback - urb status -71
yealink 5-1:36.0: unexpected response 0
yealink 5-1:36.0: urb_ctl_callback - urb status -71


---
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