hso 3-1:0.0: Failed to find BULK IN ep
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BUG: KASAN: use-after-free in string_nocheck+0x1ee/0x220 lib/vsprintf.c:607
Read of size 1 at addr ffff8881c33b5708 by task kworker/0:2/94

CPU: 0 PID: 94 Comm: kworker/0:2 Not tainted 5.6.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xef/0x16e lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:374
 __kasan_report.cold+0x37/0x77 mm/kasan/report.c:506
 kasan_report+0xe/0x20 mm/kasan/common.c:641
 string_nocheck+0x1ee/0x220 lib/vsprintf.c:607
 string+0xe5/0xf0 lib/vsprintf.c:689
 vsnprintf+0x7d3/0x14f0 lib/vsprintf.c:2574
 vscnprintf+0x29/0x80 lib/vsprintf.c:2677
 vprintk_store+0x40/0x4b0 kernel/printk/printk.c:1917
 vprintk_emit+0xc8/0x3d0 kernel/printk/printk.c:1978
 vprintk_func+0x75/0x113 kernel/printk/printk_safe.c:386
 __warn_printk+0xc6/0xf3 kernel/panic.c:628
 sysfs_remove_group fs/sysfs/group.c:278 [inline]
 sysfs_remove_group+0x155/0x1b0 fs/sysfs/group.c:269
 dpm_sysfs_remove+0x97/0xb0 drivers/base/power/sysfs.c:741
 device_del+0x18b/0xd30 drivers/base/core.c:2654
 device_unregister+0x22/0xc0 drivers/base/core.c:2709
 device_destroy+0x96/0xd0 drivers/base/core.c:3288
 tty_unregister_device+0x7e/0x1a0 drivers/tty/tty_io.c:3190
 hso_serial_tty_unregister drivers/net/usb/hso.c:2232 [inline]
 hso_create_bulk_serial_device drivers/net/usb/hso.c:2678 [inline]
 hso_probe.cold+0x6e/0x14c drivers/net/usb/hso.c:2944
 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2500
 usb_set_configuration+0xece/0x1840 drivers/usb/core/message.c:2025
 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241
 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2500
 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2548
 hub_port_connect drivers/usb/core/hub.c:5195 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5335 [inline]
 port_event drivers/usb/core/hub.c:5481 [inline]
 hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5563
 process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 94:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc mm/kasan/common.c:515 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:488
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2786 [inline]
 slab_alloc mm/slub.c:2794 [inline]
 __kmalloc_track_caller+0xf0/0x330 mm/slub.c:4373
 kstrdup+0x36/0x70 mm/util.c:60
 kstrdup_const+0x53/0x80 mm/util.c:82
 kvasprintf_const+0x108/0x190 lib/kasprintf.c:48
 kobject_set_name_vargs+0x56/0x150 lib/kobject.c:289
 dev_set_name+0xbb/0xf0 drivers/base/core.c:2278
 tty_register_device_attr+0x2ad/0x6f0 drivers/tty/tty_io.c:3137
 hso_serial_common_create+0x113/0x710 drivers/net/usb/hso.c:2266
 hso_create_bulk_serial_device drivers/net/usb/hso.c:2648 [inline]
 hso_probe+0xc93/0x1b7b drivers/net/usb/hso.c:2944
 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2500
 usb_set_configuration+0xece/0x1840 drivers/usb/core/message.c:2025
 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241
 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2500
 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2548
 hub_port_connect drivers/usb/core/hub.c:5195 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5335 [inline]
 port_event drivers/usb/core/hub.c:5481 [inline]
 hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5563
 process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 17:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0x117/0x160 mm/kasan/common.c:476
 slab_free_hook mm/slub.c:1444 [inline]
 slab_free_freelist_hook mm/slub.c:1477 [inline]
 slab_free mm/slub.c:3034 [inline]
 kfree+0xd5/0x300 mm/slub.c:3995
 kfree_const+0x51/0x60 mm/util.c:40
 kobject_cleanup lib/kobject.c:699 [inline]
 kobject_release lib/kobject.c:722 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x280/0x550 lib/kobject.c:739
 put_device drivers/base/core.c:2599 [inline]
 device_unregister+0x34/0xc0 drivers/base/core.c:2710
 device_destroy+0x96/0xd0 drivers/base/core.c:3288
 tty_unregister_device+0x7e/0x1a0 drivers/tty/tty_io.c:3190
 hso_serial_tty_unregister drivers/net/usb/hso.c:2232 [inline]
 hso_create_bulk_serial_device drivers/net/usb/hso.c:2678 [inline]
 hso_probe.cold+0x6e/0x14c drivers/net/usb/hso.c:2944
 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:374
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2500
 usb_set_configuration+0xece/0x1840 drivers/usb/core/message.c:2025
 usb_generic_driver_probe+0x9d/0xe0 drivers/usb/core/generic.c:241
 usb_probe_device+0xd9/0x230 drivers/usb/core/driver.c:272
 really_probe+0x290/0xac0 drivers/base/dd.c:551
 driver_probe_device+0x223/0x350 drivers/base/dd.c:724
 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:831
 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:431
 __device_attach+0x217/0x390 drivers/base/dd.c:897
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0x1459/0x1bf0 drivers/base/core.c:2500
 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2548
 hub_port_connect drivers/usb/core/hub.c:5195 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5335 [inline]
 port_event drivers/usb/core/hub.c:5481 [inline]
 hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5563
 process_one_work+0x94b/0x1620 kernel/workqueue.c:2266
 worker_thread+0x96/0xe20 kernel/workqueue.c:2412
 kthread+0x318/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff8881c33b5708
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 0 bytes inside of
 8-byte region [ffff8881c33b5708, ffff8881c33b5710)
The buggy address belongs to the page:
page:ffffea00070ced40 refcount:1 mapcount:0 mapping:ffff8881da003900 index:0x0
flags: 0x200000000000200(slab)
raw: 0200000000000200 dead000000000100 dead000000000122 ffff8881da003900
raw: 0000000000000000 0000000080aa00aa 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c33b5600: fb fc fc fb fc fc fb fc fc fb fc fc fb fc fc fb
 ffff8881c33b5680: fc fc fb fc fc fb fc fc 00 fc fc fb fc fc 04 fc
>ffff8881c33b5700: fc fb fc fc fb fc fc fb fc fc fb fc fc 00 fc fc
                      ^
 ffff8881c33b5780: 00 fc fc fb fc fc fb fc fc fb fc fc fb fc fc fc
 ffff8881c33b5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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