usb 4-1: USB disconnect, device number 56
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BUG: KASAN: slab-out-of-bounds in __mutex_lock_common kernel/locking/mutex.c:625 [inline]
BUG: KASAN: slab-out-of-bounds in __mutex_lock+0x15ca/0x1bd0 kernel/locking/mutex.c:821
Read of size 8 at addr ffff8881208bc560 by task kworker/0:6/5513

CPU: 0 UID: 0 PID: 5513 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x13d/0x4b0 mm/kasan/report.c:482
 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595
 __mutex_lock_common kernel/locking/mutex.c:625 [inline]
 __mutex_lock+0x15ca/0x1bd0 kernel/locking/mutex.c:821
 usbatm_usb_disconnect+0x70/0x7e0 drivers/usb/atm/usbatm.c:1221
 uea_disconnect+0x279/0x2b0 drivers/usb/atm/ueagle-atm.c:2605
 usb_unbind_interface+0x1dd/0x9e0 drivers/usb/core/driver.c:461
 device_remove drivers/base/dd.c:618 [inline]
 device_remove+0x12a/0x180 drivers/base/dd.c:610
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
 bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
 device_del+0x376/0x9b0 drivers/base/core.c:3961
 usb_disable_device+0x367/0x810 drivers/usb/core/message.c:1478
 usb_disconnect+0x2e2/0x9a0 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1d0c/0x4af0 drivers/usb/core/hub.c:5953
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 5229:
 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57
 kasan_save_track+0x14/0x30 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x35e/0x670 mm/slub.c:5515
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 dev_pm_qos_expose_flags+0x96/0x310 drivers/base/power/qos.c:783
 usb_hub_create_port_device+0x9a2/0xe60 drivers/usb/core/port.c:830
 hub_configure drivers/usb/core/hub.c:1734 [inline]
 hub_probe.cold+0x2974/0x2ecf drivers/usb/core/hub.c:2001
 usb_probe_interface+0x386/0x9b0 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x64/0x160 drivers/base/bus.c:620
 device_add+0x121d/0x1970 drivers/base/core.c:3772
 usb_set_configuration+0xd97/0x1c60 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0xa1/0xe0 drivers/usb/core/generic.c:250
 usb_probe_device+0xef/0x400 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
 __device_attach_driver+0x1df/0x320 drivers/base/dd.c:1026
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:500
 __device_attach+0x1e4/0x4d0 drivers/base/dd.c:1098
 device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x64/0x160 drivers/base/bus.c:620
 device_add+0x121d/0x1970 drivers/base/core.c:3772
 usb_new_device.cold+0x685/0x115c drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x314d/0x4af0 drivers/usb/core/hub.c:5953
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x69a/0xc80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff8881208bc500
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 24 bytes to the right of
 allocated 72-byte region [ffff8881208bc500, ffff8881208bc548)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1208bc
flags: 0x200000000000000(node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000000 ffff888100041280 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800200020 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2886, tgid 2886 (run-parts), ts 19269719493, free_ts 19266866843
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859
 prep_new_page mm/page_alloc.c:1867 [inline]
 get_page_from_freelist+0xf25/0x3400 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x28f/0x2b90 mm/page_alloc.c:5304
 alloc_slab_page mm/slub.c:3294 [inline]
 allocate_slab mm/slub.c:3408 [inline]
 new_slab+0xa2/0x670 mm/slub.c:3454
 refill_objects+0xe3/0x410 mm/slub.c:7338
 refill_sheaf mm/slub.c:2832 [inline]
 __pcs_replace_empty_main+0x376/0x680 mm/slub.c:4703
 alloc_from_pcs mm/slub.c:4801 [inline]
 slab_alloc_node mm/slub.c:4933 [inline]
 __do_kmalloc_node mm/slub.c:5361 [inline]
 __kmalloc_noprof+0x60d/0x7c0 mm/slub.c:5387
 _kmalloc_noprof include/linux/slab.h:973 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 ext4_find_extent+0x21b/0xa30 fs/ext4/extents.c:918
 ext4_ext_map_blocks+0x215/0x59a0 fs/ext4/extents.c:4286
 ext4_map_query_blocks+0x113/0x930 fs/ext4/inode.c:568
 ext4_map_blocks+0x3b4/0xd30 fs/ext4/inode.c:786
 ext4_getblk+0x5f8/0x740 fs/ext4/inode.c:992
 ext4_bread+0x2c/0x190 fs/ext4/inode.c:1055
 __ext4_read_dirblock+0x12e/0xc30 fs/ext4/namei.c:144
 htree_dirblock_to_tree+0x158/0xad0 fs/ext4/namei.c:1051
 ext4_htree_fill_tree+0x38f/0xd30 fs/ext4/namei.c:1188
page last free pid 2886 tgid 2886 stack trace:
 create_dummy_stack mm/page_owner.c:103 [inline]
 register_dummy_stack+0x74/0xb0 mm/page_owner.c:109
 init_page_owner+0x42/0x660 mm/page_owner.c:127
 invoke_init_callbacks mm/page_ext.c:152 [inline]
 page_ext_init+0x968/0x9e0 mm/page_ext.c:490
 mm_core_init+0x23c/0x290 mm/mm_init.c:2741

Memory state around the buggy address:
 ffff8881208bc400: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8881208bc480: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
>ffff8881208bc500: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
                                                       ^
 ffff8881208bc580: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8881208bc600: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
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