Extracting prog: 7m49.489671528s
Minimizing prog: 31m1.022352332s
Simplifying prog options: 12m23.155516365s
Extracting C: 5m15.214173245s
Simplifying C: 0s
extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
detailed listing:
executing program 0:
r0 = openat$uhid(0xffffffffffffff9c, &(0x7f0000002340), 0x802, 0x0)
write$UHID_CREATE2(r0, &(0x7f0000000200)=ANY=[@ANYBLOB="0b00000073797a310000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101f000000008000040000060000000200"], 0x1118)
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
detailed listing:
executing program 0:
r0 = openat$uhid(0xffffffffffffff9c, &(0x7f0000002340), 0x802, 0x0)
write$UHID_CREATE2(r0, &(0x7f0000000200)=ANY=[@ANYBLOB="0b00000073797a310000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101f000000008000040000060000000200"], 0x1118)
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
detailed listing:
executing program 0:
r0 = openat$uhid(0xffffffffffffff9c, &(0x7f0000002340), 0x802, 0x0)
write$UHID_CREATE2(r0, &(0x7f0000000200)=ANY=[@ANYBLOB="0b00000073797a310000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101f000000008000040000060000000200"], 0x1118)
program crashed: INFO: task hung in uevent_show
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid
detailed listing:
executing program 0:
openat$uhid(0xffffffffffffff9c, &(0x7f0000002340), 0x802, 0x0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): write$UHID_CREATE2
detailed listing:
executing program 0:
write$UHID_CREATE2(0xffffffffffffffff, &(0x7f0000000200)=ANY=[@ANYBLOB="0b00000073797a310000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101f000000008000040000060000000200"], 0x1118)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
detailed listing:
executing program 0:
r0 = openat$uhid(0xffffffffffffff9c, 0x0, 0x802, 0x0)
write$UHID_CREATE2(r0, &(0x7f0000000200)=ANY=[@ANYBLOB="0b00000073797a310000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101f000000008000040000060000000200"], 0x1118)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
detailed listing:
executing program 0:
r0 = openat$uhid(0xffffffffffffff9c, &(0x7f0000002340), 0x802, 0x0)
write$UHID_CREATE2(r0, 0x0, 0x1118)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
detailed listing:
executing program 0:
r0 = openat$uhid(0xffffffffffffff9c, &(0x7f0000002340), 0x802, 0x0)
write$UHID_CREATE2(r0, &(0x7f0000000200)=ANY=[@ANYBLOB], 0x1118)
program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
detailed listing:
executing program 0:
r0 = openat$uhid(0xffffffffffffff9c, &(0x7f0000002340), 0x802, 0x0)
write$UHID_CREATE2(r0, &(0x7f0000000200)=ANY=[@ANYBLOB="0b00000073797a310000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101f000000008000040000060000000200"], 0x1118)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$uhid-write$UHID_CREATE2
detailed listing:
executing program 0:
r0 = openat$uhid(0xffffffffffffff9c, &(0x7f0000002340), 0x802, 0x0)
write$UHID_CREATE2(r0, &(0x7f0000000200)=ANY=[@ANYBLOB="0b00000073797a310000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000073797a3100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000101f000000008000040000060000000200"], 0x1118)
program crashed: INFO: task hung in uhid_char_release
a never seen crash title: INFO: task hung in uhid_char_release, ignore
reproducing took 56m28.881730134s
repro crashed as (corrupted=false):
INFO: task udevd:5846 blocked for more than 143 seconds.
Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D
stack:24504 pid:5846 tgid:5846 ppid:5195 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 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+0x7e7/0xee0 kernel/locking/mutex.c:735
device_lock include/linux/device.h:1014 [inline]
uevent_show+0x17d/0x340 drivers/base/core.c:2729
dev_attr_show+0x55/0xc0 drivers/base/core.c:2423
sysfs_kf_seq_show+0x331/0x4c0 fs/sysfs/file.c:59
seq_read_iter+0x43f/0xd70 fs/seq_file.c:230
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x991/0xb70 fs/read_write.c:565
ksys_read+0x18f/0x2b0 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf0c916b6a
RSP: 002b:00007ffe46efd5f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000561400e29580 RCX: 00007faf0c916b6a
RDX: 0000000000001000 RSI: 0000561400e04620 RDI: 0000000000000008
RBP: 0000561400e29580 R08: 0000000000000008 R09: 0000000000000008
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffe46efdad8 R15: 000000000000000a
</TASK>
INFO: task syz.3.19:6073 blocked for more than 144 seconds.
Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.19 state:D
stack:25952 pid:6073 tgid:6073 ppid:5930 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
__flush_work+0xa47/0xc60 kernel/workqueue.c:4235
__cancel_work_sync+0xbc/0x110 kernel/workqueue.c:4355
uhid_dev_destroy drivers/hid/uhid.c:584 [inline]
uhid_char_release+0xac/0x600 drivers/hid/uhid.c:662
__fput+0x23c/0xa50 fs/file_table.c:450
task_work_run+0x24f/0x310 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb5c985d29
RSP: 002b:00007ffd6bef9b68 EFLAGS: 00000246
ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000015796 RCX: 00007fdb5c985d29
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fdb5cb77ba0 R08: 0000000000000001 R09: 00007ffd6bef9e5f
R10: 00007fdb5c800000 R11: 0000000000000246 R12: 00000000000157d3
R13: 00007fdb5cb75fa0 R14: 0000000000000032 R15: ffffffffffffffff
</TASK>
Showing all locks held in the system:
5 locks held by kworker/u8:0/11:
4 locks held by kworker/u8:1/12:
#0: ffff88801baeb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801baeb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1:
ffffc90000117d00
(
net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2:
ffffffff8fc94550
(pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x16a/0xd50 net/core/net_namespace.c:602
#3:
ffffffff8fca0a08
(
rtnl_mutex
){+.+.}-{4:4}
, at: default_device_exit_batch+0xe9/0xaa0 net/core/dev.c:12061
1 lock held by khungtaskd/30:
#0:
ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:2/35:
#0:
ffff88801ac89148
(
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1:
ffffc90000ab7d00
(
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2:
ffffffff8fca0a08
(
rtnl_mutex
){+.+.}-{4:4}
, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281
3 locks held by kworker/1:1/52:
3 locks held by kworker/u8:4/72:
3 locks held by kworker/0:2/973:
5 locks held by kworker/u8:6/1112:
3 locks held by kworker/u8:9/3442:
#0:
ffff88814c6c0948
(
(wq_completion)ipv6_addrconf
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc9000cd17d00 ((work_completion)(&(&ifa->dad_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffffffff8fca0a08
(
rtnl_mutex
){+.+.}-{4:4}
, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4215
5 locks held by kworker/1:2/4995:
4 locks held by udevd/5195:
#0:
ffff8880352242f0 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1: ffff888034bbdc88 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff88802ed4af08 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff888032deda20 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff888032deda20 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2729
2 locks held by getty/5578:
#0: ffff88814ca1d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
8 locks held by kworker/1:3/5845:
4 locks held by udevd/5846:
#0:
ffff888033869b08
(
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1: ffff888062363488 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff888022b55698 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff888028279a20 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff888028279a20 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2729
3 locks held by kworker/1:4/5899:
5 locks held by kworker/u9:3/5932:
#0: ffff88805c792948 ((wq_completion)hci9){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88805c792948 ((wq_completion)hci9){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc90003a37d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90003a37d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffff8880715e4d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331
#3: ffff8880715e4078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1e4/0x11f0 net/bluetooth/hci_sync.c:5584
#4: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#4: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
2 locks held by syz-executor/6326:
#0:
ffffffff8f516de0
(
&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4011
2 locks held by syz-executor/6341:
#0: ffffffff90189360 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff90189360 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff90189360 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4011
2 locks held by syz-executor/6346:
#0: ffffffff901a60d0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff901a60d0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff901a60d0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4011
2 locks held by syz-executor/6367:
#0: ffffffff8fc94550 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x20e/0x720 net/ipv4/ip_tunnel.c:1159
2 locks held by syz-executor/6370:
#0: ffffffff8fc94550 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x20e/0x720 net/ipv4/ip_tunnel.c:1159
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 5845 Comm: kworker/1:3 Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events uhid_device_add_worker
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:409
Code: 70 0e 57 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 f1 e6 ba fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc9000406ec78 EFLAGS: 00000002
RAX: 1ffffffff34d7c00 RBX: ffffffff9a6be580 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff85486556 R09: 1ffff110049e3046
R10: dffffc0000000000 R11: ffffffff85486510 R12: dffffc0000000000
R13: ffffffff9a3b8f70 R14: 00000000000003fd R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f956b8a7d60 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
serial_in drivers/tty/serial/8250/8250.h:137 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline]
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2088 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3335 [inline]
serial8250_console_write+0x1373/0x1ed0 drivers/tty/serial/8250/8250_port.c:3413
console_emit_next_record kernel/printk/printk.c:3122 [inline]
console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3210
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432
dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4935
dev_printk_emit+0xdd/0x120 drivers/base/core.c:4946
_dev_warn+0x122/0x170 drivers/base/core.c:5002
hid_parser_main+0x71f/0xaa0 drivers/hid/hid-core.c:660
hid_open_report+0xbd8/0x1580 drivers/hid/hid-core.c:1322
hid_parse include/linux/hid.h:1123 [inline]
hid_generic_probe+0x3d/0x90 drivers/hid/hid-generic.c:66
__hid_device_probe drivers/hid/hid-core.c:2718 [inline]
hid_device_probe+0x3bf/0x710 drivers/hid/hid-core.c:2755
really_probe+0x2b8/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:459
__device_attach+0x333/0x520 drivers/base/dd.c:1030
bus_probe_device+0x189/0x260 drivers/base/bus.c:534
device_add+0x856/0xbf0 drivers/base/core.c:3665
hid_add_device+0x3b6/0x520 drivers/hid/hid-core.c:2901
uhid_device_add_worker+0x44/0xf0 drivers/hid/uhid.c:73
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
final repro crashed as (corrupted=false):
INFO: task udevd:5846 blocked for more than 143 seconds.
Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D
stack:24504 pid:5846 tgid:5846 ppid:5195 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 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+0x7e7/0xee0 kernel/locking/mutex.c:735
device_lock include/linux/device.h:1014 [inline]
uevent_show+0x17d/0x340 drivers/base/core.c:2729
dev_attr_show+0x55/0xc0 drivers/base/core.c:2423
sysfs_kf_seq_show+0x331/0x4c0 fs/sysfs/file.c:59
seq_read_iter+0x43f/0xd70 fs/seq_file.c:230
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0x991/0xb70 fs/read_write.c:565
ksys_read+0x18f/0x2b0 fs/read_write.c:708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faf0c916b6a
RSP: 002b:00007ffe46efd5f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000561400e29580 RCX: 00007faf0c916b6a
RDX: 0000000000001000 RSI: 0000561400e04620 RDI: 0000000000000008
RBP: 0000561400e29580 R08: 0000000000000008 R09: 0000000000000008
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffe46efdad8 R15: 000000000000000a
</TASK>
INFO: task syz.3.19:6073 blocked for more than 144 seconds.
Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.19 state:D
stack:25952 pid:6073 tgid:6073 ppid:5930 flags:0x00000004
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0x17fb/0x4be0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6848
schedule_timeout+0xb0/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
__flush_work+0xa47/0xc60 kernel/workqueue.c:4235
__cancel_work_sync+0xbc/0x110 kernel/workqueue.c:4355
uhid_dev_destroy drivers/hid/uhid.c:584 [inline]
uhid_char_release+0xac/0x600 drivers/hid/uhid.c:662
__fput+0x23c/0xa50 fs/file_table.c:450
task_work_run+0x24f/0x310 kernel/task_work.c:239
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdb5c985d29
RSP: 002b:00007ffd6bef9b68 EFLAGS: 00000246
ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000015796 RCX: 00007fdb5c985d29
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fdb5cb77ba0 R08: 0000000000000001 R09: 00007ffd6bef9e5f
R10: 00007fdb5c800000 R11: 0000000000000246 R12: 00000000000157d3
R13: 00007fdb5cb75fa0 R14: 0000000000000032 R15: ffffffffffffffff
</TASK>
Showing all locks held in the system:
5 locks held by kworker/u8:0/11:
4 locks held by kworker/u8:1/12:
#0: ffff88801baeb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801baeb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1:
ffffc90000117d00
(
net_cleanup_work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2:
ffffffff8fc94550
(pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x16a/0xd50 net/core/net_namespace.c:602
#3:
ffffffff8fca0a08
(
rtnl_mutex
){+.+.}-{4:4}
, at: default_device_exit_batch+0xe9/0xaa0 net/core/dev.c:12061
1 lock held by khungtaskd/30:
#0:
ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}
, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:2/35:
#0:
ffff88801ac89148
(
(wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1:
ffffc90000ab7d00
(
(linkwatch_work).work
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2:
ffffffff8fca0a08
(
rtnl_mutex
){+.+.}-{4:4}
, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281
3 locks held by kworker/1:1/52:
3 locks held by kworker/u8:4/72:
3 locks held by kworker/0:2/973:
5 locks held by kworker/u8:6/1112:
3 locks held by kworker/u8:9/3442:
#0:
ffff88814c6c0948
(
(wq_completion)ipv6_addrconf
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3204 [inline]
, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc9000cd17d00 ((work_completion)(&(&ifa->dad_work)->work)
){+.+.}-{0:0}
, at: process_one_work kernel/workqueue.c:3205 [inline]
, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffffffff8fca0a08
(
rtnl_mutex
){+.+.}-{4:4}
, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4215
5 locks held by kworker/1:2/4995:
4 locks held by udevd/5195:
#0:
ffff8880352242f0 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1: ffff888034bbdc88 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff88802ed4af08 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff888032deda20 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff888032deda20 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2729
2 locks held by getty/5578:
#0: ffff88814ca1d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
8 locks held by kworker/1:3/5845:
4 locks held by udevd/5846:
#0:
ffff888033869b08
(
&p->lock
){+.+.}-{4:4}
, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1: ffff888062363488 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff888022b55698 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff888028279a20 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff888028279a20 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2729
3 locks held by kworker/1:4/5899:
5 locks held by kworker/u9:3/5932:
#0: ffff88805c792948 ((wq_completion)hci9){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88805c792948 ((wq_completion)hci9){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310
#1: ffffc90003a37d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90003a37d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310
#2: ffff8880715e4d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331
#3: ffff8880715e4078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1e4/0x11f0 net/bluetooth/hci_sync.c:5584
#4: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#4: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:976
2 locks held by syz-executor/6326:
#0:
ffffffff8f516de0
(
&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4011
2 locks held by syz-executor/6341:
#0: ffffffff90189360 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff90189360 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff90189360 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4011
2 locks held by syz-executor/6346:
#0: ffffffff901a60d0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff901a60d0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff901a60d0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xce2/0x2210 net/core/rtnetlink.c:4011
2 locks held by syz-executor/6367:
#0: ffffffff8fc94550 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x20e/0x720 net/ipv4/ip_tunnel.c:1159
2 locks held by syz-executor/6370:
#0: ffffffff8fc94550 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x328/0x570 net/core/net_namespace.c:512
#1: ffffffff8fca0a08 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x20e/0x720 net/ipv4/ip_tunnel.c:1159
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 5845 Comm: kworker/1:3 Not tainted 6.13.0-rc6-syzkaller-00038-g09a0fa92e5b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events uhid_device_add_worker
RIP: 0010:io_serial_in+0x76/0xb0 drivers/tty/serial/8250/8250_port.c:409
Code: 70 0e 57 fc 89 e9 41 d3 e6 48 83 c3 40 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 f1 e6 ba fc 44 03 33 44 89 f2 ec <0f> b6 c0 5b 41 5e 41 5f 5d c3 cc cc cc cc 89 e9 80 e1 07 38 c1 7c
RSP: 0018:ffffc9000406ec78 EFLAGS: 00000002
RAX: 1ffffffff34d7c00 RBX: ffffffff9a6be580 RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000000 R08: ffffffff85486556 R09: 1ffff110049e3046
R10: dffffc0000000000 R11: ffffffff85486510 R12: dffffc0000000000
R13: ffffffff9a3b8f70 R14: 00000000000003fd R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f956b8a7d60 CR3: 000000000e736000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
serial_in drivers/tty/serial/8250/8250.h:137 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline]
wait_for_lsr drivers/tty/serial/8250/8250_port.c:2088 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3335 [inline]
serial8250_console_write+0x1373/0x1ed0 drivers/tty/serial/8250/8250_port.c:3413
console_emit_next_record kernel/printk/printk.c:3122 [inline]
console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3210
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432
dev_vprintk_emit+0x2ae/0x330 drivers/base/core.c:4935
dev_printk_emit+0xdd/0x120 drivers/base/core.c:4946
_dev_warn+0x122/0x170 drivers/base/core.c:5002
hid_parser_main+0x71f/0xaa0 drivers/hid/hid-core.c:660
hid_open_report+0xbd8/0x1580 drivers/hid/hid-core.c:1322
hid_parse include/linux/hid.h:1123 [inline]
hid_generic_probe+0x3d/0x90 drivers/hid/hid-generic.c:66
__hid_device_probe drivers/hid/hid-core.c:2718 [inline]
hid_device_probe+0x3bf/0x710 drivers/hid/hid-core.c:2755
really_probe+0x2b8/0xad0 drivers/base/dd.c:658
__driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
driver_probe_device+0x50/0x430 drivers/base/dd.c:830
__device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:459
__device_attach+0x333/0x520 drivers/base/dd.c:1030
bus_probe_device+0x189/0x260 drivers/base/bus.c:534
device_add+0x856/0xbf0 drivers/base/core.c:3665
hid_add_device+0x3b6/0x520 drivers/hid/hid-core.c:2901
uhid_device_add_worker+0x44/0xf0 drivers/hid/uhid.c:73
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>