================================================================== BUG: KASAN: use-after-free in __mutex_lock_common /kernel/locking/mutex.c:1010 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x11a8/0x12b0 /kernel/locking/mutex.c:1073 Read of size 8 at addr ffff8881c7cdcbf0 by task v4l_id/4667 CPU: 0 PID: 4667 Comm: v4l_id Not tainted 5.2.0-rc6+ #15 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 __mutex_lock_common /kernel/locking/mutex.c:1010 [inline] __mutex_lock+0x11a8/0x12b0 /kernel/locking/mutex.c:1073 __video_do_ioctl+0x5c7/0xb30 /drivers/media/v4l2-core/v4l2-ioctl.c:2839 video_usercopy+0x446/0xee0 /drivers/media/v4l2-core/v4l2-ioctl.c:3053 v4l2_ioctl+0x147/0x1a0 /drivers/media/v4l2-core/v4l2-dev.c:360 vfs_ioctl /fs/ioctl.c:46 [inline] file_ioctl /fs/ioctl.c:509 [inline] do_vfs_ioctl+0xcda/0x12e0 /fs/ioctl.c:696 ksys_ioctl+0x9b/0xc0 /fs/ioctl.c:713 __do_sys_ioctl /fs/ioctl.c:720 [inline] __se_sys_ioctl /fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x6f/0xb0 /fs/ioctl.c:718 do_syscall_64+0xb7/0x560 /arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f43c0164347 Code: 90 90 90 48 8b 05 f1 fa 2a 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 90 90 90 90 90 90 90 90 90 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 fa 2a 00 31 d2 48 29 c2 64 RSP: 002b:00007ffe70f9b5c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f43c0164347 RDX: 00007ffe70f9b5d0 RSI: 0000000080685600 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000400884 R13: 00007ffe70f9b720 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 2850: 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 slab_post_alloc_hook /mm/slab.h:437 [inline] slab_alloc_node /mm/slub.c:2748 [inline] __kmalloc_node_track_caller+0xee/0x370 /mm/slub.c:4363 alloc_dr /drivers/base/devres.c:103 [inline] devm_kmalloc+0x87/0x190 /drivers/base/devres.c:815 devm_kzalloc /./include/linux/device.h:679 [inline] usb_raremono_probe+0x2f/0x231 /drivers/media/radio/radio-raremono.c:298 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+0x6a4/0xe61 /drivers/usb/core/hub.c:2536 hub_port_connect /drivers/usb/core/hub.c:5098 [inline] hub_port_connect_change /drivers/usb/core/hub.c:5213 [inline] port_event /drivers/usb/core/hub.c:5359 [inline] hub_event+0x1abd/0x3550 /drivers/usb/core/hub.c:5441 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 Freed by task 2850: 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 release_nodes+0x4a1/0x910 /drivers/base/devres.c:508 devres_release_all+0x74/0xc3 /drivers/base/devres.c:529 __device_release_driver /drivers/base/dd.c:1085 [inline] device_release_driver_internal+0x21b/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:2199 hub_port_connect /drivers/usb/core/hub.c:4949 [inline] hub_port_connect_change /drivers/usb/core/hub.c:5213 [inline] port_event /drivers/usb/core/hub.c:5359 [inline] hub_event+0x13bd/0x3550 /drivers/usb/core/hub.c:5441 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 ffff8881c7cdc400 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2032 bytes inside of 4096-byte region [ffff8881c7cdc400, ffff8881c7cdd400) The buggy address belongs to the page: page:ffffea00071f3600 refcount:1 mapcount:0 mapping:ffff8881dac02600 index:0x0 compound_mapcount: 0 flags: 0x200000000010200(slab|head) raw: 0200000000010200 ffffea0006ba1c00 0000000200000002 ffff8881dac02600 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c7cdca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881c7cdcb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881c7cdcb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881c7cdcc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881c7cdcc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================