cpia2: Control message failed, err val = -19 cpia2: Message: request = 0x1, start = 0xA9 cpia2: Message: count = 1, register[0] = 0x0 cpia2: Unexpected error: -19 ================================================================== BUG: KASAN: use-after-free in cpia2_usb_disconnect+0x1a9/0x1c0 drivers/media/usb/cpia2/cpia2_usb.c:907 Read of size 8 at addr ffff8880a09f0a58 by task kworker/0:1/12 CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.1.0-rc4-319354-g9a33b36 #3 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+0xe8/0x16e lib/dump_stack.c:113 print_address_description+0x6c/0x236 mm/kasan/report.c:187 kasan_report.cold+0x1a/0x3c mm/kasan/report.c:317 cpia2_usb_disconnect+0x1a9/0x1c0 drivers/media/usb/cpia2/cpia2_usb.c:907 usb_unbind_interface+0x1c9/0x980 drivers/usb/core/driver.c:423 __device_release_driver drivers/base/dd.c:1082 [inline] device_release_driver_internal+0x436/0x4f0 drivers/base/dd.c:1113 bus_remove_device+0x302/0x5c0 drivers/base/bus.c:556 device_del+0x467/0xb90 drivers/base/core.c:2269 usb_disable_device+0x242/0x790 drivers/usb/core/message.c:1235 usb_disconnect+0x298/0x870 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+0xcd2/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7b0/0xe20 kernel/workqueue.c:2417 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Allocated by task 12: set_track mm/kasan/common.c:87 [inline] __kasan_kmalloc mm/kasan/common.c:497 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:470 kmalloc include/linux/slab.h:547 [inline] kzalloc include/linux/slab.h:742 [inline] cpia2_init_camera_struct+0x45/0x110 drivers/media/usb/cpia2/cpia2_core.c:2185 cpia2_usb_probe.cold+0x37/0x45a drivers/media/usb/cpia2/cpia2_usb.c:842 usb_probe_interface+0x31d/0x820 drivers/usb/core/driver.c:361 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_set_configuration+0xdf7/0x1740 drivers/usb/core/message.c:2021 generic_probe+0xa2/0xda drivers/usb/core/generic.c:210 usb_probe_device+0xc0/0x150 drivers/usb/core/driver.c:266 really_probe+0x2da/0xb10 drivers/base/dd.c:509 driver_probe_device+0x21d/0x350 drivers/base/dd.c:671 __device_attach_driver+0x1d8/0x290 drivers/base/dd.c:778 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:454 __device_attach+0x223/0x3a0 drivers/base/dd.c:844 bus_probe_device+0x1f1/0x2a0 drivers/base/bus.c:514 device_add+0xad2/0x16e0 drivers/base/core.c:2106 usb_new_device.cold+0x537/0xccf 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+0x138e/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 worker_thread+0x9b/0xe20 kernel/workqueue.c:2415 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Freed by task 12: set_track mm/kasan/common.c:87 [inline] __kasan_slab_free+0x130/0x180 mm/kasan/common.c:459 slab_free_hook mm/slub.c:1429 [inline] slab_free_freelist_hook+0x5e/0x140 mm/slub.c:1456 slab_free mm/slub.c:3003 [inline] kfree+0xce/0x290 mm/slub.c:3958 v4l2_device_release drivers/media/v4l2-core/v4l2-device.c:67 [inline] kref_put include/linux/kref.h:67 [inline] v4l2_device_put+0x7e/0xa0 drivers/media/v4l2-core/v4l2-device.c:72 cpia2_usb_disconnect+0x7e/0x1c0 drivers/media/usb/cpia2/cpia2_usb.c:905 usb_unbind_interface+0x1c9/0x980 drivers/usb/core/driver.c:423 __device_release_driver drivers/base/dd.c:1082 [inline] device_release_driver_internal+0x436/0x4f0 drivers/base/dd.c:1113 bus_remove_device+0x302/0x5c0 drivers/base/bus.c:556 device_del+0x467/0xb90 drivers/base/core.c:2269 usb_disable_device+0x242/0x790 drivers/usb/core/message.c:1235 usb_disconnect+0x298/0x870 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+0xcd2/0x3b00 drivers/usb/core/hub.c:5432 process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 process_scheduled_works kernel/workqueue.c:2331 [inline] worker_thread+0x7b0/0xe20 kernel/workqueue.c:2417 kthread+0x313/0x420 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8880a09f0000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2648 bytes inside of 4096-byte region [ffff8880a09f0000, ffff8880a09f1000) The buggy address belongs to the page: page:ffffea0002827c00 count:1 mapcount:0 mapping:ffff88812c3f4600 index:0x0 compound_mapcount: 0 flags: 0xfff00000010200(slab|head) raw: 00fff00000010200 dead000000000100 dead000000000200 ffff88812c3f4600 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a09f0900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a09f0980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880a09f0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880a09f0a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880a09f0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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