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Subject[syzbot] memory leak in usb_get_configuration
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Hello,

syzbot found the following issue on:

HEAD commit: 0014404f9c18 Merge branch 'akpm' (patches from Andrew)
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15864216700000
kernel config: https://syzkaller.appspot.com/x/.config?x=3f0a704147ec8e32
dashboard link: https://syzkaller.appspot.com/bug?extid=f0fae482604e6d9a87c9
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13a63dbe700000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10e150a1700000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f0fae482604e6d9a87c9@syzkaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff88810c0289e0 (size 32):
comm "kworker/1:2", pid 139, jiffies 4294947862 (age 15.910s)
hex dump (first 32 bytes):
09 02 12 00 01 00 00 00 00 09 04 00 00 00 d0 bb ................
3a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 :...............
backtrace:
[<ffffffff82c98127>] kmalloc include/linux/slab.h:586 [inline]
[<ffffffff82c98127>] usb_get_configuration+0x1c7/0x1cd0 drivers/usb/core/config.c:919
[<ffffffff82c863f9>] usb_enumerate_device drivers/usb/core/hub.c:2398 [inline]
[<ffffffff82c863f9>] usb_new_device+0x1a9/0x2e0 drivers/usb/core/hub.c:2536
[<ffffffff82c88ea4>] hub_port_connect drivers/usb/core/hub.c:5358 [inline]
[<ffffffff82c88ea4>] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
[<ffffffff82c88ea4>] port_event drivers/usb/core/hub.c:5660 [inline]
[<ffffffff82c88ea4>] hub_event+0x1364/0x21a0 drivers/usb/core/hub.c:5742
[<ffffffff8126a41f>] process_one_work+0x2bf/0x600 kernel/workqueue.c:2307
[<ffffffff8126ad49>] worker_thread+0x59/0x5b0 kernel/workqueue.c:2454
[<ffffffff81274705>] kthread+0x125/0x160 kernel/kthread.c:377
[<ffffffff810021ef>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff88810a600f40 (size 64):
comm "kworker/1:2", pid 139, jiffies 4294947866 (age 15.870s)
hex dump (first 32 bytes):
01 00 00 00 01 00 00 00 09 04 00 00 00 d0 bb 3a ...............:
00 00 00 00 00 00 00 00 f2 89 02 0c 81 88 ff ff ................
backtrace:
[<ffffffff82c9871d>] kmalloc include/linux/slab.h:586 [inline]
[<ffffffff82c9871d>] kzalloc include/linux/slab.h:714 [inline]
[<ffffffff82c9871d>] usb_parse_configuration drivers/usb/core/config.c:772 [inline]
[<ffffffff82c9871d>] usb_get_configuration+0x7bd/0x1cd0 drivers/usb/core/config.c:944
[<ffffffff82c863f9>] usb_enumerate_device drivers/usb/core/hub.c:2398 [inline]
[<ffffffff82c863f9>] usb_new_device+0x1a9/0x2e0 drivers/usb/core/hub.c:2536
[<ffffffff82c88ea4>] hub_port_connect drivers/usb/core/hub.c:5358 [inline]
[<ffffffff82c88ea4>] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
[<ffffffff82c88ea4>] port_event drivers/usb/core/hub.c:5660 [inline]
[<ffffffff82c88ea4>] hub_event+0x1364/0x21a0 drivers/usb/core/hub.c:5742
[<ffffffff8126a41f>] process_one_work+0x2bf/0x600 kernel/workqueue.c:2307
[<ffffffff8126ad49>] worker_thread+0x59/0x5b0 kernel/workqueue.c:2454
[<ffffffff81274705>] kthread+0x125/0x160 kernel/kthread.c:377
[<ffffffff810021ef>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295



---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches

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