Hello, syzbot found the following issue on: HEAD commit: e3ee0e74 usb: common: usb-conn-gpio: Register charger git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=175a3e0c900000 kernel config: https://syzkaller.appspot.com/x/.config?x=fb6677a3d4f11788 dashboard link: https://syzkaller.appspot.com/bug?extid=aafdc32825a345214a76 compiler: gcc (GCC) 10.1.0-syz 20200507 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+aafdc32825a345214a76@xxxxxxxxxxxxxxxxxxxxxxxxx usb 1-1: USB disconnect, device number 72 ================================================================== BUG: KASAN: slab-out-of-bounds in usb_destroy_configuration+0x636/0x6d0 drivers/usb/core/config.c:834 Read of size 8 at addr ffff8881c7e3c758 by task kworker/1:7/3434 CPU: 1 PID: 3434 Comm: kworker/1:7 Not tainted 5.8.0-rc7-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:77 [inline] dump_stack+0xf6/0x16e lib/dump_stack.c:118 print_address_description.constprop.0+0x1a/0x210 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x37/0x7c mm/kasan/report.c:530 usb_destroy_configuration+0x636/0x6d0 drivers/usb/core/config.c:834 usb_release_dev+0x3e/0x100 drivers/usb/core/usb.c:417 device_release+0x71/0x200 drivers/base/core.c:1579 kobject_cleanup lib/kobject.c:693 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x245/0x540 lib/kobject.c:739 put_device+0x1b/0x30 drivers/base/core.c:2799 hub_port_connect drivers/usb/core/hub.c:5059 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x1c93/0x4390 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x392/0x470 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Allocated by task 13775: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc2/0xd0 mm/kasan/common.c:494 kmalloc include/linux/slab.h:560 [inline] kzalloc include/linux/slab.h:669 [inline] usb_get_configuration+0x186/0x3a50 drivers/usb/core/config.c:887 usb_enumerate_device drivers/usb/core/hub.c:2387 [inline] usb_new_device+0x42c/0x7a0 drivers/usb/core/hub.c:2523 hub_port_connect drivers/usb/core/hub.c:5208 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x2361/0x4390 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x392/0x470 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Freed by task 3070: save_stack+0x1b/0x40 mm/kasan/common.c:48 set_track mm/kasan/common.c:56 [inline] kasan_set_free_info mm/kasan/common.c:316 [inline] __kasan_slab_free+0x116/0x160 mm/kasan/common.c:455 slab_free_hook mm/slub.c:1474 [inline] slab_free_freelist_hook+0x53/0x140 mm/slub.c:1507 slab_free mm/slub.c:3072 [inline] kfree+0xbc/0x2c0 mm/slub.c:4052 kfree_const+0x51/0x60 mm/util.c:40 kobject_cleanup lib/kobject.c:699 [inline] kobject_release lib/kobject.c:722 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x26f/0x540 lib/kobject.c:739 put_device drivers/base/core.c:2799 [inline] device_unregister+0x34/0xc0 drivers/base/core.c:2910 usb_remove_ep_devs+0x3e/0x80 drivers/usb/core/endpoint.c:215 remove_intf_ep_devs drivers/usb/core/message.c:1120 [inline] usb_disable_device+0x335/0x930 drivers/usb/core/message.c:1244 usb_disconnect.cold+0x27d/0x780 drivers/usb/core/hub.c:2217 hub_port_connect drivers/usb/core/hub.c:5059 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x1c93/0x4390 drivers/usb/core/hub.c:5576 process_one_work+0x94c/0x15f0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x392/0x470 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 The buggy address belongs to the object at ffff8881c7e3c750 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of 8-byte region [ffff8881c7e3c750, ffff8881c7e3c758) The buggy address belongs to the page: page:ffffea00071f8f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8881c7e3c7b0 flags: 0x200000000000200(slab) raw: 0200000000000200 ffffea00071ffac0 0000000b0000000b ffff8881da003900 raw: ffff8881c7e3c7b0 0000000080aa00a8 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881c7e3c600: 00 fc fc 00 fc fc fb fc fc fb fc fc 00 fc fc fb ffff8881c7e3c680: fc fc fb fc fc fb fc fc fb fc fc fb fc fc fb fc >ffff8881c7e3c700: fc fb fc fc 00 fc fc fb fc fc 00 fc fc fb fc fc ^ ffff8881c7e3c780: 00 fc fc fb fc fc fb fc fc 00 fc fc fb fc fc 00 ffff8881c7e3c800: fc fc 00 fc fc fb fc fc fb fc fc 00 fc fc 00 fc ================================================================== --- This report is generated by a bot. 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