INFO: task udevd:8969 blocked for more than 143 seconds.
Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:26352 pid:8969 tgid:8969 ppid:2546 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xcda/0x2f80 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
__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: 0033:0x7f69207f6b6a
RSP: 002b:00007ffe4a675f38 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055b30de4e890 RCX: 00007f69207f6b6a
RDX: 0000000000001000 RSI: 000055b30de48660 RDI: 0000000000000008
RBP: 000055b30de4e890 R08: 0000000000000008 R09: 0000000000000004
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000003fff R14: 00007ffe4a676418 R15: 000000000000000a
Showing all locks held in the system:
5 locks held by kworker/0:1/9:
#0:
ffff888104ac2d48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000009fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff888108f23190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff888108f23190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849
#3: ffff88810fab3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff88810fab3190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1004
#4: ffff88811eacd160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff88811eacd160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1004
1 lock held by khungtaskd/30:
#0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff88cb68a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620
2 locks held by getty/2604:
#0:
ffff8881136e90a0
(
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
4 locks held by udevd/4892:
#0: ffff8881176759e0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff888109b7d888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88811d518968 (kn->active#3){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff88810fab3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff88810fab3190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
6 locks held by kworker/0:3/4926:
4 locks held by udevd/4929:
#0: ffff88810c749540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff88811bda4888 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88810efc24b8 (kn->active#3){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff88811b65f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff88811b65f190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
5 locks held by kworker/0:5/4960:
5 locks held by kworker/1:5/4995:
4 locks held by udevd/8969:
#0: ffff888115cdad58 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff8881175dac88 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff888119b73698 (kn->active#3){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff888119316190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff888119316190 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
2 locks held by syz.3.2423/12936:
#0:
ffffffff897a2f70
(
minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
#1: ffffffff8985ddc8 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x640 drivers/usb/class/cdc-wdm.c:715
2 locks held by syz.4.2425/12941:
#0: ffffffff897a2f70 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
#1: ffffffff8985ddc8 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x640 drivers/usb/class/cdc-wdm.c:715
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
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+0xf4e/0x1280 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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 12940 Comm: syz.2.2426 Not tainted 6.11.0-rc1-syzkaller-00033-g25f51b76f90f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:memchr+0x36/0x80 lib/string.c:791
Code: 00 00 00 fc ff df 53 48 83 ec 18 eb 26 48 8d 5f 01 48 89 f8 48 89 f9 48 c1 e8 03 83 e1 07 0f b6 04 28 38 c8 7f 04 84 c0 75 29 <40> 3a 73 ff 74 15 48 89 df 48 39 d7 75 d5 48 83 c4 18 31 c0 5b 5d
RSP: 0018:ffffc9000fa87818 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8de06676 RCX: 0000000000000005
RDX: ffffffff8de066a5 RSI: 000000000000000a RDI: ffffffff8de06675
RBP: dffffc0000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 000000007fffffff R11: 00000000002b3f58 R12: 0000000000000017
R13: 0000000000000800 R14: 0000000000000000 R15: ffffffff8de06660
FS: 00007f1e7cf876c0(0000) GS:ffff8881f6200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e7e5c1000 CR3: 000000011d3ac000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
memchr include/linux/fortify-string.h:727 [inline]
record_print_text+0x16b/0x400 kernel/printk/printk.c:1414
printk_get_next_message+0x2a6/0x670 kernel/printk/printk.c:2910
console_emit_next_record kernel/printk/printk.c:2950 [inline]
console_flush_all+0x3b2/0xd70 kernel/printk/printk.c:3049
console_unlock+0xae/0x290 kernel/printk/printk.c:3118
vprintk_emit kernel/printk/printk.c:2348 [inline]
vprintk_emit+0x11a/0x5a0 kernel/printk/printk.c:2303
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:45
_printk+0xc8/0x100 kernel/printk/printk.c:2373
usb_gadget_register_driver_owner+0x1c6/0x2f0 drivers/usb/gadget/udc/core.c:1711
raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:595 [inline]
raw_ioctl+0x1737/0x2b90 drivers/usb/gadget/legacy/raw_gadget.c:1306
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl fs/ioctl.c:893 [inline]
__x64_sys_ioctl+0x193/0x220 fs/ioctl.c:893
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: 0033:0x7f1e7e3075fb
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f1e7cf84f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f1e7e3075fb
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 00007f1e7cf85fe0 R08: 0000000000000000 R09: 00322e6364755f79
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1e7cf84fb0 R14: 0000000020000bc0 R15: 00007f1e7e5c0b88