dvb-usb: schedule remote query interval to 100 msecs.
dvb-usb: Technisat SkyStar USB HD (DVB-S/S2) successfully initialized and connected.
==================================================================
BUG: KASAN: slab-out-of-bounds in technisat_usb2_get_ir drivers/media/usb/dvb-usb/technisat-usb2.c:664 [inline]
BUG: KASAN: slab-out-of-bounds in technisat_usb2_rc_query+0x5f5/0x650 drivers/media/usb/dvb-usb/technisat-usb2.c:679
Read of size 1 at addr ffff8881cffd9728 by task kworker/0:2/107

CPU: 0 PID: 107 Comm: kworker/0:2 Not tainted 5.2.0-rc6+ #13
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events dvb_usb_read_remote_control
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 print_address_description+0x67/0x231 mm/kasan/report.c:188
 __kasan_report.cold+0x1a/0x32 mm/kasan/report.c:317
 kasan_report+0xe/0x20 mm/kasan/common.c:614
 technisat_usb2_get_ir drivers/media/usb/dvb-usb/technisat-usb2.c:664 [inline]
 technisat_usb2_rc_query+0x5f5/0x650 drivers/media/usb/dvb-usb/technisat-usb2.c:679
 dvb_usb_read_remote_control+0xdb/0x1b0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261
 process_one_work+0x905/0x1570 kernel/workqueue.c:2269
 worker_thread+0x96/0xe20 kernel/workqueue.c:2415
 kthread+0x30b/0x410 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 107:
 save_stack+0x1b/0x80 mm/kasan/common.c:71
 set_track mm/kasan/common.c:79 [inline]
 __kasan_kmalloc mm/kasan/common.c:489 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:462
 dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:149 [inline]
 dvb_usb_device_init.cold+0x463/0x11b0 drivers/media/usb/dvb-usb/dvb-usb-init.c:274
 technisat_usb2_probe+0x7d/0x2c0 drivers/media/usb/dvb-usb/technisat-usb2.c:763
 usb_probe_interface+0x305/0x7a0 drivers/usb/core/driver.c:361
 really_probe+0x281/0x660 drivers/base/dd.c:509
 driver_probe_device+0x104/0x210 drivers/base/dd.c:670
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
 bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
 __device_attach+0x217/0x360 drivers/base/dd.c:843
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
 device_add+0xae6/0x16f0 drivers/base/core.c:2111
 usb_set_configuration+0xdf6/0x1670 drivers/usb/core/message.c:2023
 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210
 usb_probe_device+0x99/0x100 drivers/usb/core/driver.c:266
 really_probe+0x281/0x660 drivers/base/dd.c:509
 driver_probe_device+0x104/0x210 drivers/base/dd.c:670
 __device_attach_driver+0x1c2/0x220 drivers/base/dd.c:777
 bus_for_each_drv+0x15c/0x1e0 drivers/base/bus.c:454
 __device_attach+0x217/0x360 drivers/base/dd.c:843
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:514
 device_add+0xae6/0x16f0 drivers/base/core.c:2111
 usb_new_device.cold+0x8c1/0x1016 drivers/usb/core/hub.c:2534
 hub_port_connect drivers/usb/core/hub.c:5089 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
 port_event drivers/usb/core/hub.c:5350 [inline]
 hub_event+0x1ada/0x3590 drivers/usb/core/hub.c:5432
 process_one_work+0x905/0x1570 kernel/workqueue.c:2269
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417
 kthread+0x30b/0x410 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 3632:
 save_stack+0x1b/0x80 mm/kasan/common.c:71
 set_track mm/kasan/common.c:79 [inline]
 __kasan_slab_free+0x130/0x180 mm/kasan/common.c:451
 slab_free_hook mm/slub.c:1421 [inline]
 slab_free_freelist_hook mm/slub.c:1448 [inline]
 slab_free mm/slub.c:2994 [inline]
 kfree+0xd7/0x280 mm/slub.c:3949
 full_proxy_release+0x1ee/0x2e0 fs/debugfs/file.c:242
 __fput+0x2d7/0x790 fs/file_table.c:280
 task_work_run+0x13f/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:185 [inline]
 exit_to_usermode_loop+0x1c5/0x1f0 arch/x86/entry/common.c:168
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
 do_syscall_64+0x43f/0x560 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8881cffd9640
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 232 bytes inside of
 256-byte region [ffff8881cffd9640, ffff8881cffd9740)
The buggy address belongs to the page:
page:ffffea00073ff640 refcount:1 mapcount:0 mapping:ffff8881dac02e00 index:0xffff8881cffd9140
flags: 0x200000000000200(slab)
raw: 0200000000000200 ffffea00072e5480 0000000600000006 ffff8881dac02e00
raw: ffff8881cffd9140 00000000800c000a 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881cffd9600: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff8881cffd9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881cffd9700: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff8881cffd9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881cffd9800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================