INFO: task syz.2.464:7113 blocked for more than 143 seconds.
Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.464 state:D stack:28704 pid:7113 tgid:7112 ppid:2651 flags:0x00000004
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
usblp_open+0x5c/0x450 drivers/usb/class/usblp.c:417
usb_open+0x213/0x2f0 drivers/usb/core/file.c:47
chrdev_open+0x26d/0x6f0 fs/char_dev.c:414
do_dentry_open+0x957/0x1490 fs/open.c:959
vfs_open+0x82/0x3f0 fs/open.c:1089
do_open fs/namei.c:3727 [inline]
path_openat+0x2141/0x2d20 fs/namei.c:3886
do_filp_open+0x1dc/0x430 fs/namei.c:3913
do_sys_openat2+0x17a/0x1e0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1442
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: 0033:0x7f0c30f2c890
RSP: 002b:00007f0c2fba6b70 EFLAGS: 00000293
ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f0c30f2c890
RDX: 0000000000000002 RSI: 00007f0c2fba6c10 RDI: 00000000ffffff9c
RBP: 00007f0c2fba6c10 R08: 0000000000000000 R09: 00007f0c2fba6987
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0c310e5f80 R15: 00007ffd31f4e418
INFO: task syz.1.465:7115 blocked for more than 143 seconds.
Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.465 state:D stack:28464 pid:7115 tgid:7114 ppid:2654 flags:0x00000004
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
usblp_open+0x5c/0x450 drivers/usb/class/usblp.c:417
usb_open+0x213/0x2f0 drivers/usb/core/file.c:47
chrdev_open+0x26d/0x6f0 fs/char_dev.c:414
do_dentry_open+0x957/0x1490 fs/open.c:959
vfs_open+0x82/0x3f0 fs/open.c:1089
do_open fs/namei.c:3727 [inline]
path_openat+0x2141/0x2d20 fs/namei.c:3886
do_filp_open+0x1dc/0x430 fs/namei.c:3913
do_sys_openat2+0x17a/0x1e0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1442
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: 0033:0x7f72d8f5c890
RSP: 002b:00007f72d7bd6b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f72d8f5c890
RDX: 0000000000000002 RSI: 00007f72d7bd6c10 RDI: 00000000ffffff9c
RBP: 00007f72d7bd6c10 R08: 0000000000000000 R09: 00007f72d7bd6987
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f72d9115f80 R15: 00007ffe4263a1a8
INFO: task syz.0.469:7131 blocked for more than 144 seconds.
Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.469 state:D stack:28464 pid:7131 tgid:7129 ppid:2648 flags:0x00000004
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
usblp_open+0x5c/0x450 drivers/usb/class/usblp.c:417
usb_open+0x213/0x2f0 drivers/usb/core/file.c:47
chrdev_open+0x26d/0x6f0 fs/char_dev.c:414
do_dentry_open+0x957/0x1490 fs/open.c:959
vfs_open+0x82/0x3f0 fs/open.c:1089
do_open fs/namei.c:3727 [inline]
path_openat+0x2141/0x2d20 fs/namei.c:3886
do_filp_open+0x1dc/0x430 fs/namei.c:3913
do_sys_openat2+0x17a/0x1e0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1442
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: 0033:0x7f9eccc1c890
RSP: 002b:00007f9ecb875b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f9eccc1c890
RDX: 0000000000000002 RSI: 00007f9ecb875c10 RDI: 00000000ffffff9c
RBP: 00007f9ecb875c10 R08: 0000000000000000 R09: 00007f9ecb875987
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9eccdd6058 R15: 00007ffc2fb90378
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff88ebb660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff88ebb660 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff88ebb660 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626
4 locks held by kworker/u8:6/290:
#0: ffff888100abb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000175fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffffffff8a161d50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbb0 net/core/net_namespace.c:594
#3: ffffffff88ec6cc0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6c0 kernel/rcu/tree.c:4486
2 locks held by getty/2605:
#0: ffff88810aaa50a0 (&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
6 locks held by kworker/1:4/4934:
#0: ffff888106687548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc90004297d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff888109b8d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#2: ffff888109b8d190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5849
#3: ffff88811e6fd190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff88811e6fd190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1004
#4: ffff8881083aa160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff8881083aa160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1004
#5: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x11c/0x550 drivers/usb/core/file.c:134
5 locks held by kworker/0:6/5616:
1 lock held by syz.3.462/7111:
#0: ffffffff89a693e8 (usblp_mutex){+.+.}-{3:3}, at: usblp_release+0x7f/0x310 drivers/usb/class/usblp.c:480
2 locks held by syz.2.464/7113:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
#1: ffffffff89a693e8 (usblp_mutex){+.+.}-{3:3}, at: usblp_open+0x5c/0x450 drivers/usb/class/usblp.c:417
2 locks held by syz.1.465/7115:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
#1: ffffffff89a693e8 (usblp_mutex){+.+.}-{3:3}, at: usblp_open+0x5c/0x450 drivers/usb/class/usblp.c:417
2 locks held by syz.0.469/7131:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
#1: ffffffff89a693e8 (usblp_mutex){+.+.}-{3:3}, at: usblp_open+0x5c/0x450 drivers/usb/class/usblp.c:417
1 lock held by syz.4.489/8334:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.3.473/8984:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.2.476/9120:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.1.492/9175:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.0.494/9228:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.4.499/9852:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.4.499/9860:
#0:
ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.4.499/9901:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.4.499/9916:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.3.503/11496:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.3.503/11498:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.1.497/11637:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.1.497/11646:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.0.518/11823:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.0.518/11828:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.2.519/11826:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
1 lock held by syz.4.537/12345:
#0: ffffffff899b0110 (minor_rwsem){++++}-{3:3}, at: usb_open+0x27/0x2f0 drivers/usb/core/file.c:38
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc7-syzkaller-00152-g68d4209158f4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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+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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111