================================================================== 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 ffff8881cd8549a8 by task kworker/1:3/2736 CPU: 1 PID: 2736 Comm: kworker/1:3 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 2736: 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 21: 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 dvb_free_device drivers/media/dvb-core/dvbdev.c:574 [inline] dvb_free_device drivers/media/dvb-core/dvbdev.c:569 [inline] dvb_unregister_device+0x3f/0x60 drivers/media/dvb-core/dvbdev.c:583 dvb_dmxdev_release+0x1c9/0x640 drivers/media/dvb-core/dmxdev.c:1460 dvb_usb_adapter_dvb_exit+0xea/0x1b0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:225 dvb_usb_adapter_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:114 [inline] dvb_usb_exit+0xcd/0x250 drivers/media/usb/dvb-usb/dvb-usb-init.c:129 dvb_usb_device_exit+0x9f/0xc0 drivers/media/usb/dvb-usb/dvb-usb-init.c:292 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:423 __device_release_driver drivers/base/dd.c:1081 [inline] device_release_driver_internal+0x404/0x4c0 drivers/base/dd.c:1112 bus_remove_device+0x2dc/0x4a0 drivers/base/bus.c:556 device_del+0x460/0xb80 drivers/base/core.c:2274 usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237 usb_disconnect+0x284/0x830 drivers/usb/core/hub.c:2197 hub_port_connect drivers/usb/core/hub.c:4940 [inline] hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] port_event drivers/usb/core/hub.c:5350 [inline] hub_event+0x1409/0x3590 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 The buggy address belongs to the object at ffff8881cd8548c0 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 232 bytes inside of 256-byte region [ffff8881cd8548c0, ffff8881cd8549c0) The buggy address belongs to the page: page:ffffea0007361500 refcount:1 mapcount:0 mapping:ffff8881dac02e00 index:0x0 flags: 0x200000000000200(slab) raw: 0200000000000200 ffffea0007255a00 0000000a0000000a ffff8881dac02e00 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cd854880: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff8881cd854900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881cd854980: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881cd854a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881cd854a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================