INFO: task syz-executor.4:12132 blocked for more than 143 seconds.
Not tainted 5.19.0-rc7-syzkaller-00158-gd5e22360e907 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28712 pid:12132 ppid: 11667 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x93f/0x2630 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747
sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396
usb_open+0x204/0x2e0 drivers/usb/core/file.c:48
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x49c/0x10b0 fs/open.c:848
do_open fs/namei.c:3520 [inline]
path_openat+0x1c71/0x2910 fs/namei.c:3653
do_filp_open+0x1aa/0x400 fs/namei.c:3680
do_sys_openat2+0x16d/0x4c0 fs/open.c:1278
do_sys_open fs/open.c:1294 [inline]
__do_sys_openat fs/open.c:1310 [inline]
__se_sys_openat fs/open.c:1305 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1305
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5999b56124
RSP: 002b:00007f5999318ca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5999cb5f60 RCX: 00007f5999b56124
RDX: 0000000000000002 RSI: 00007f5999318d40 RDI: 00000000ffffff9c
RBP: 00007f5999318d40 R08: 0000000000000000 R09: 000000000000000f
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffc8300deef R14: 00007f5999319300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff87a95140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
6 locks held by kworker/0:2/1144:
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90002dcfda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f2a9190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f2a9190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5681
#3: ffff88810fa12190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff88810fa12190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:964
#4: ffff88811a2eb118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff88811a2eb118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:964
#5: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x19d/0x7e0 drivers/usb/core/file.c:156
2 locks held by getty/1240:
#0: ffff8881108c1098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900000432e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
6 locks held by kworker/0:4/4050:
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90001a7fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f469190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f469190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5681
#3: ffff88811be24190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff88811be24190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:964
#4: ffff888109c37118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff888109c37118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:964
#5: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x19d/0x7e0 drivers/usb/core/file.c:156
6 locks held by kworker/0:5/4061:
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888109cc0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc9000257fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
#2: ffff88810f411190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#2: ffff88810f411190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5681
#3: ffff88811218d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#3: ffff88811218d190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:964
#4: ffff888109bd6118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
#4: ffff888109bd6118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:964
#5: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline]
#5: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x19d/0x7e0 drivers/usb/core/file.c:156
2 locks held by syz-executor.3/11785:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
#1: ffff888136ef88d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396
2 locks held by syz-executor.4/12132:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
#1: ffff888136ef88d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396
1 lock held by syz-executor.5/12178:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
3 locks held by udevd/12141:
#0: ffff88811654a488 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:197 [inline]
#0: ffff88811654a488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x6e0 fs/kernfs/file.c:236
#1: ffff88810950da00 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:198 [inline]
#1: ffff88810950da00 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x6e0 fs/kernfs/file.c:236
#2: ffff88811be24190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline]
#2: ffff88811be24190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
3 locks held by udevd/12157:
#0: ffff88810facb088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:197 [inline]
#0: ffff88810facb088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x6e0 fs/kernfs/file.c:236
#1: ffff888119def748 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:198 [inline]
#1: ffff888119def748 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x6e0 fs/kernfs/file.c:236
#2: ffff88811218d190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline]
#2: ffff88811218d190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
1 lock held by syz-executor.4/13083:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
1 lock held by syz-executor.4/13084:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
1 lock held by syz-executor.3/13098:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
1 lock held by syz-executor.5/14017:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
1 lock held by syz-executor.4/14030:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
1 lock held by syz-executor.4/14031:
#0: ffffffff88419d50 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.19.0-rc7-syzkaller-00158-gd5e22360e907 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2ef/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1306 Comm: syz-executor.2 Not tainted 5.19.0-rc7-syzkaller-00158-gd5e22360e907 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x20 kernel/kcov.c:297
Code: 84 00 00 00 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 bc fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 9e fe ff ff 66 66 2e 0f 1f 84 00 00
RSP: 0018:ffffc9000114fef8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff815857d2
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 000000000000003d
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000555556d83400(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc293e38110 CR3: 0000000134430000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_user_exit.constprop.0+0x162/0x220 include/trace/events/context_tracking.h:48
__context_tracking_exit+0xbd/0xe0 kernel/context_tracking.c:161
user_exit_irqoff include/linux/context_tracking.h:47 [inline]
__enter_from_user_mode kernel/entry/common.c:24 [inline]
syscall_enter_from_user_mode+0x4c/0x70 kernel/entry/common.c:106
do_syscall_64+0x16/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f408ec49666
Code: 1f 44 00 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24
RSP: 002b:00007ffe6ad10698 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000000003f9 RCX: 00007f408ec49666
RDX: 0000000040000001 RSI: 00007ffe6ad106fc RDI: 00000000ffffffff
RBP: 00007ffe6ad106fc R08: 00000000000003f2 R09: 00007ffe6add9080
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000032
R13: 00000000000f6822 R14: 0000000000000000 R15: 00007ffe6ad10760