usb 1-1: USB disconnect, device number 78
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BUG: KASAN: use-after-free in dvb_usb_device_exit+0x274/0x280 drivers/media/usb/dvb-usb/dvb-usb-init.c:305
Read of size 8 at addr ffff88814a6b22e8 by task kworker/1:7/12660

CPU: 1 PID: 12660 Comm: kworker/1:7 Not tainted 5.12.0-syzkaller #0
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:79 [inline]
 dump_stack+0x143/0x1db lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:436
 dvb_usb_device_exit+0x274/0x280 drivers/media/usb/dvb-usb/dvb-usb-init.c:305
 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458
 __device_release_driver+0x3bd/0x6f0 drivers/base/dd.c:1181
 device_release_driver_internal drivers/base/dd.c:1212 [inline]
 device_release_driver+0x26/0x40 drivers/base/dd.c:1235
 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533
 device_del+0x502/0xd40 drivers/base/core.c:3507
 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1413
 usb_disconnect.cold+0x27d/0x791 drivers/usb/core/hub.c:2219
 hub_port_connect drivers/usb/core/hub.c:5127 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5416 [inline]
 port_event drivers/usb/core/hub.c:5562 [inline]
 hub_event+0x1c9c/0x4320 drivers/usb/core/hub.c:5644
 process_one_work+0x98d/0x1580 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Allocated by task 11339:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:427 [inline]
 ____kasan_kmalloc mm/kasan/common.c:506 [inline]
 __kasan_kmalloc+0x7a/0x90 mm/kasan/common.c:515
 kmalloc include/linux/slab.h:554 [inline]
 kzalloc include/linux/slab.h:684 [inline]
 uevent_show+0x15c/0x390 drivers/base/core.c:2343
 dev_attr_show+0x4b/0x90 drivers/base/core.c:2050
 sysfs_kf_seq_show+0x1f8/0x400 fs/sysfs/file.c:61
 seq_read_iter+0x4d3/0x1220 fs/seq_file.c:227
 kernfs_fop_read_iter+0x44f/0x5f0 fs/kernfs/file.c:241
 call_read_iter include/linux/fs.h:1971 [inline]
 new_sync_read+0x41e/0x6e0 fs/read_write.c:415
 vfs_read+0x35c/0x570 fs/read_write.c:496
 ksys_read+0x12d/0x250 fs/read_write.c:634
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 2624:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357
 ____kasan_slab_free mm/kasan/common.c:360 [inline]
 ____kasan_slab_free mm/kasan/common.c:325 [inline]
 __kasan_slab_free+0xda/0x110 mm/kasan/common.c:367
 kasan_slab_free include/linux/kasan.h:199 [inline]
 slab_free_hook mm/slub.c:1562 [inline]
 slab_free_freelist_hook+0x6b/0x160 mm/slub.c:1600
 slab_free mm/slub.c:3161 [inline]
 kfree+0xdb/0x3b0 mm/slub.c:4213
 dw2102_probe+0x782/0xb10 drivers/media/usb/dvb-usb/dw2102.c:2470
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 really_probe+0x291/0xf60 drivers/base/dd.c:576
 driver_probe_device+0x298/0x410 drivers/base/dd.c:763
 __device_attach_driver+0x203/0x2c0 drivers/base/dd.c:870
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x228/0x4b0 drivers/base/dd.c:938
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xbe0/0x2100 drivers/base/core.c:3319
 usb_set_configuration+0x113f/0x1910 drivers/usb/core/message.c:2164
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 really_probe+0x291/0xf60 drivers/base/dd.c:576
 driver_probe_device+0x298/0x410 drivers/base/dd.c:763
 __device_attach_driver+0x203/0x2c0 drivers/base/dd.c:870
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:431
 __device_attach+0x228/0x4b0 drivers/base/dd.c:938
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:491
 device_add+0xbe0/0x2100 drivers/base/core.c:3319
 usb_new_device.cold+0x721/0x1058 drivers/usb/core/hub.c:2556
 hub_port_connect drivers/usb/core/hub.c:5276 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5416 [inline]
 port_event drivers/usb/core/hub.c:5562 [inline]
 hub_event+0x2357/0x4320 drivers/usb/core/hub.c:5644
 process_one_work+0x98d/0x1580 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x38c/0x460 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the object at ffff88814a6b2000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 744 bytes inside of
 4096-byte region [ffff88814a6b2000, ffff88814a6b3000)
The buggy address belongs to the page:
page:ffffea000529ac00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14a6b0
head:ffffea000529ac00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x200000000010200(slab|head)
raw: 0200000000010200 0000000000000000 0000000100000001 ffff888100042140
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 28532, ts 545912818791
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x161/0x1c0 mm/page_alloc.c:2302
 prep_new_page mm/page_alloc.c:2311 [inline]
 get_page_from_freelist+0x2440/0x3260 mm/page_alloc.c:3951
 __alloc_pages_nodemask+0x288/0x690 mm/page_alloc.c:5001
 alloc_pages_current+0x18c/0x2a0 mm/mempolicy.c:2277
 alloc_pages include/linux/gfp.h:561 [inline]
 alloc_slab_page mm/slub.c:1638 [inline]
 allocate_slab+0x2c5/0x4c0 mm/slub.c:1778
 new_slab mm/slub.c:1841 [inline]
 new_slab_objects mm/slub.c:2587 [inline]
 ___slab_alloc+0x476/0x7b0 mm/slub.c:2750
 __slab_alloc+0x68/0x80 mm/slub.c:2790
 slab_alloc_node mm/slub.c:2871 [inline]
 slab_alloc mm/slub.c:2915 [inline]
 __kmalloc+0x2b1/0x2d0 mm/slub.c:4051
 kmalloc include/linux/slab.h:559 [inline]
 tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822
 security_inode_getattr+0xcf/0x140 security/security.c:1288
 vfs_getattr fs/stat.c:131 [inline]
 vfs_statx+0x164/0x390 fs/stat.c:199
 vfs_fstatat fs/stat.c:217 [inline]
 vfs_stat include/linux/fs.h:3236 [inline]
 __do_sys_newstat+0x91/0x110 fs/stat.c:359
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1271 [inline]
 __free_pages_ok+0x502/0xdb0 mm/page_alloc.c:1540
 unfreeze_partials+0x16c/0x1b0 mm/slub.c:2368
 put_cpu_partial+0x5b/0x150 mm/slub.c:2404
 qlink_free mm/kasan/quarantine.c:146 [inline]
 qlist_free_all+0x5a/0xc0 mm/kasan/quarantine.c:165
 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272
 __kasan_slab_alloc+0x68/0x70 mm/kasan/common.c:437
 kasan_slab_alloc include/linux/kasan.h:223 [inline]
 slab_post_alloc_hook mm/slab.h:516 [inline]
 slab_alloc_node mm/slub.c:2907 [inline]
 slab_alloc mm/slub.c:2915 [inline]
 __kmalloc_track_caller+0x14c/0x2a0 mm/slub.c:4561
 memdup_user+0x22/0xd0 mm/util.c:173
 raw_alloc_io_data drivers/usb/gadget/legacy/raw_gadget.c:591 [inline]
 raw_alloc_io_data+0x182/0x1c0 drivers/usb/gadget/legacy/raw_gadget.c:577
 raw_ioctl_ep0_write drivers/usb/gadget/legacy/raw_gadget.c:679 [inline]
 raw_ioctl+0x16b9/0x2720 drivers/usb/gadget/legacy/raw_gadget.c:1220
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Memory state around the buggy address:
 ffff88814a6b2180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88814a6b2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88814a6b2280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff88814a6b2300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88814a6b2380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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