INFO: task udevd:5859 blocked for more than 143 seconds.
Not tainted 6.15.0-rc2-syzkaller-00682-gcd7276ecac9c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D
stack:26696 pid:5859 tgid:5859 ppid:5210 task_flags:0x400140 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
__mutex_lock_common kernel/locking/mutex.c:678 [inline]
__mutex_lock+0x805/0x10c0 kernel/locking/mutex.c:746
device_lock include/linux/device.h:922 [inline]
uevent_show+0x17d/0x340 drivers/base/core.c:2730
dev_attr_show+0x55/0xc0 drivers/base/core.c:2424
sysfs_kf_seq_show+0x32b/0x4a0 fs/sysfs/file.c:65
seq_read_iter+0x461/0xda0 fs/seq_file.c:230
new_sync_read fs/read_write.c:489 [inline]
vfs_read+0x9a0/0xb90 fs/read_write.c:570
ksys_read+0x19d/0x2d0 fs/read_write.c:713
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1e9fb16b6a
RSP: 002b:00007ffec3c5e318 EFLAGS: 00000246
ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000056213805d730 RCX: 00007f1e9fb16b6a
RDX: 0000000000001000 RSI: 000056213808c200 RDI: 0000000000000008
RBP: 000056213805d730 R08: 0000000000000008 R09: 0000000000000200
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffec3c5e7f8 R15: 000000000000000a
</TASK>
INFO: task khidpd_04570009:5864 blocked for more than 143 seconds.
Not tainted 6.15.0-rc2-syzkaller-00682-gcd7276ecac9c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khidpd_04570009 state:D stack:26688 pid:5864 tgid:5864 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_timeout+0xb1/0x2b0 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+0x32f/0x600 kernel/sched/completion.c:148
__flush_work+0xa48/0xc60 kernel/workqueue.c:4244
__cancel_work_sync+0xbc/0x110 kernel/workqueue.c:4364
hidp_session_remove+0x64/0x260 net/bluetooth/hidp/core.c:1169
l2cap_unregister_user+0x19c/0x1c0 net/bluetooth/l2cap_core.c:1733
hidp_session_thread+0x450/0x490 net/bluetooth/hidp/core.c:1304
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
INFO: task syz-executor581:5870 blocked for more than 144 seconds.
Not tainted 6.15.0-rc2-syzkaller-00682-gcd7276ecac9c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor581 state:D stack:27048 pid:5870 tgid:5870 ppid:5857 task_flags:0x400140 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1b88/0x5240 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0x163/0x360 kernel/sched/core.c:6860
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917
__mutex_lock_common kernel/locking/mutex.c:678 [inline]
__mutex_lock+0x805/0x10c0 kernel/locking/mutex.c:746
l2cap_chan_connect+0x102/0xea0 net/bluetooth/l2cap_core.c:6955
l2cap_sock_connect+0x622/0x950 net/bluetooth/l2cap_sock.c:256
__sys_connect_file net/socket.c:2038 [inline]
__sys_connect+0x28c/0x2d0 net/socket.c:2057
__do_sys_connect net/socket.c:2063 [inline]
__se_sys_connect net/socket.c:2060 [inline]
__x64_sys_connect+0x7a/0x90 net/socket.c:2060
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f500ee6e0c9
RSP: 002b:00007ffd69163238 EFLAGS: 00000246
ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f500ee6e0c9
RDX: 000000000000000e RSI: 0000200000000080 RDI: 0000000000000004
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000555500000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd69163280
R13: 00007ffd69163290 R14: 0000000000028a5f R15: 00007ffd69163250
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0:
ffffffff8ed3df20 (
rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 kernel/locking/lockdep.c:6764
3 locks held by kworker/1:2/2153:
5 locks held by kworker/u8:8/3494:
#0: ffff8880b8739b18 (&rq->__lock){-.-.}-{2:2}
, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:605
#1:
ffff8880b8723b08
(
&per_cpu_ptr(group->pcpu, cpu)->seq
){-.-.}-{0:0}
, at: psi_task_switch+0x41f/0x7a0 kernel/sched/psi.c:987
#2:
ffff8880b8725558
(
&base->lock){-.-.}-{2:2}, at: static_key_disable+0x12/0x20 kernel/jump_label.c:247
#3: ffffffff9a98c8b8 (&obj_hash[i].lock){-.-.}-{2:2}
, at: debug_object_activate+0x190/0x5c0 lib/debugobjects.c:818
#4:
ffffffff8ebea1c8
(
text_mutex
){+.+.}-{4:4}
, at: arch_jump_label_transform_apply+0x17/0x30 arch/x86/kernel/jump_label.c:145
2 locks held by getty/5590:
#0:
ffff88814d0b60a0
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1:
ffffc900030062f0
(
&ldata->atomic_read_lock
){+.+.}-{4:4}
, at: n_tty_read+0x5bb/0x1700 drivers/tty/n_tty.c:2222
4 locks held by udevd/5859:
#0:
ffff8880292922f0 (&p->lock){+.+.}-{4:4}
, at: seq_read_iter+0xb4/0xda0 fs/seq_file.c:182
#1:
ffff8880319d2c88
(
&of->mutex
#2
){+.+.}-{4:4}
, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2:
ffff88803417a5a8 (kn->active#5){.+.+}-{0:0}
, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3:
ffff88807d41da20
(
&dev->mutex
){....}-{4:4}
, at: device_lock include/linux/device.h:922 [inline]
, at: uevent_show+0x17d/0x340 drivers/base/core.c:2730
2 locks held by khidpd_04570009/5864:
#0:
ffff88807e638078
(
&hdev->lock){+.+.}-{4:4}, at: l2cap_unregister_user+0x6a/0x1c0 net/bluetooth/l2cap_core.c:1727
#1: ffffffff9028e210 (hidp_session_sem){++++}-{4:4}, at: hidp_session_remove+0x2d/0x260 net/bluetooth/hidp/core.c:1165
1 lock held by syz-executor581/5870:
#0: ffff88807e638078 (&hdev->lock){+.+.}-{4:4}, at: l2cap_chan_connect+0x102/0xea0 net/bluetooth/l2cap_core.c:6955
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller-00682-gcd7276ecac9c #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x4ab/0x4e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:437
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2153 Comm: kworker/1:2 Not tainted 6.15.0-rc2-syzkaller-00682-gcd7276ecac9c #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events hidp_session_dev_work
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:86 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x94/0x2a0 mm/kasan/generic.c:189
Code: 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd 41 80 3b 00 0f 85 d6 01 00 00 49 ff c3 48 ff c5 75 ee <e9> 1e 01 00 00 45 89 dc 41 83 e4 07 0f 84 b5 00 00 00 41 80 3b 00
RSP: 0018:ffffc900050ae888 EFLAGS: 00000256
RAX: ffffffff81a31001 RBX: 1ffffffff34ed34c RCX: ffffffff81a310f3
RDX: 0000000000000000 RSI: 000000000000003d RDI: ffffffff9a769a60
RBP: 0000000000000000 R08: ffffffff9a769a9c R09: 1ffffffff34ed353
R10: dffffc0000000000 R11: fffffbfff34ed354 R12: 000000000000003d
R13: dffffc0000000000 R14: dffffc0000000001 R15: fffffbfff34ed354
FS: 0000000000000000(0000) GS:ffff8881250a8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557b08e690 CR3: 0000000032a28000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105
copy_data kernel/printk/printk_ringbuffer.c:1851 [inline]
prb_read kernel/printk/printk_ringbuffer.c:1936 [inline]
_prb_read_valid+0x753/0xbb0 kernel/printk/printk_ringbuffer.c:2113
prb_read_valid+0xab/0xf0 kernel/printk/printk_ringbuffer.c:2185
printk_get_next_message+0x1f5/0x8b0 kernel/printk/printk.c:3005
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x56b/0xec0 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0x151/0x3b0 kernel/printk/printk.c:3325
vprintk_emit+0x761/0xa40 kernel/printk/printk.c:2450
dev_vprintk_emit+0x358/0x420 drivers/base/core.c:4891
dev_printk_emit+0xdf/0x130 drivers/base/core.c:4902
_dev_warn+0x12d/0x180 drivers/base/core.c:4958
hid_parser_main+0x896/0xc40 drivers/hid/hid-core.c:-1
hid_open_report+0xbda/0x1590 drivers/hid/hid-core.c:1328
hid_parse include/linux/hid.h:1126 [inline]
mt_probe+0x522/0xbd0 drivers/hid/hid-multitouch.c:1822
__hid_device_probe drivers/hid/hid-core.c:2717 [inline]
hid_device_probe+0x3bf/0x710 drivers/hid/hid-core.c:2754
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x2b9/0xad0 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+0x258/0x2e0 drivers/base/bus.c:462
__device_attach+0x341/0x530 drivers/base/dd.c:1030
bus_probe_device+0x189/0x260 drivers/base/bus.c:537
device_add+0x856/0xbf0 drivers/base/core.c:3666
hid_add_device+0x3b6/0x520 drivers/hid/hid-core.c:2900
hidp_session_dev_add net/bluetooth/hidp/core.c:856 [inline]
hidp_session_dev_work+0x46/0x160 net/bluetooth/hidp/core.c:895
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
kthread+0x7b7/0x940 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.240 msecs