================================================================== 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 ffff8881d4cf0728 by task kworker/1:2/108 CPU: 1 PID: 108 Comm: kworker/1:2 Not tainted 5.2.0-rc1+ #10 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:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x30b/0x410 kernel/kthread.c:254 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 22: 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:152 [inline] dvb_usb_device_init.cold+0x463/0x11b0 drivers/media/usb/dvb-usb/dvb-usb-init.c:277 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:2268 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 kthread+0x30b/0x410 kernel/kthread.c:254 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 1: 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 blk_mq_exit_sched+0x1e5/0x2c0 block/blk-mq-sched.c:556 elevator_exit+0x6b/0xa0 block/elevator.c:185 blk_exit_queue+0x60/0xe0 block/blk-core.c:295 blk_cleanup_queue+0xe5/0x160 block/blk-core.c:355 __scsi_remove_device+0x102/0x3c0 drivers/scsi/scsi_sysfs.c:1406 scsi_probe_and_add_lun+0x1cff/0x2cd0 drivers/scsi/scsi_scan.c:1178 __scsi_scan_target+0x273/0xc30 drivers/scsi/scsi_scan.c:1562 scsi_scan_channel.part.0+0x126/0x1a0 drivers/scsi/scsi_scan.c:1650 scsi_scan_channel drivers/scsi/scsi_scan.c:1677 [inline] scsi_scan_host_selected+0x2bb/0x3f0 drivers/scsi/scsi_scan.c:1679 do_scsi_scan_host drivers/scsi/scsi_scan.c:1817 [inline] do_scsi_scan_host+0x1e8/0x260 drivers/scsi/scsi_scan.c:1807 scsi_scan_host drivers/scsi/scsi_scan.c:1847 [inline] scsi_scan_host+0x37c/0x440 drivers/scsi/scsi_scan.c:1835 virtscsi_probe+0x9b5/0xbb3 drivers/scsi/virtio_scsi.c:853 virtio_dev_probe+0x463/0x710 drivers/virtio/virtio.c:247 really_probe+0x281/0x660 drivers/base/dd.c:509 driver_probe_device+0x104/0x210 drivers/base/dd.c:670 device_driver_attach+0x108/0x140 drivers/base/dd.c:944 __driver_attach+0xda/0x240 drivers/base/dd.c:1021 bus_for_each_dev+0x14b/0x1d0 drivers/base/bus.c:304 bus_add_driver+0x44e/0x5a0 drivers/base/bus.c:645 driver_register+0x1c4/0x320 drivers/base/driver.c:170 __write_once_size include/linux/compiler.h:221 [inline] INIT_LIST_HEAD include/linux/list.h:28 [inline] init+0xa1/0x115 drivers/char/virtio_console.c:2264 do_one_initcall+0xd7/0x5a4 init/main.c:914 do_initcall_level init/main.c:982 [inline] do_initcalls init/main.c:990 [inline] do_basic_setup init/main.c:1008 [inline] kernel_init_freeable+0x4ae/0x59b init/main.c:1168 kernel_init+0xd/0x1bf init/main.c:1086 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881d4cf0640 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 232 bytes inside of 256-byte region [ffff8881d4cf0640, ffff8881d4cf0740) The buggy address belongs to the page: page:ffffea0007533c00 refcount:1 mapcount:0 mapping:ffff8881dac02e00 index:0x0 flags: 0x200000000000200(slab) raw: 0200000000000200 ffffea000754dc00 0000000900000009 ffff8881dac02e00 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d4cf0600: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff8881d4cf0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8881d4cf0700: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ^ ffff8881d4cf0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881d4cf0800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================