linux-kernel - [syzbot] memory leak in hdcs_probe

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Date:   Wed, 31 Mar 2021 12:18:15 -0700
From:   syzbot <syzbot+990626a4ef6f043ed4cd@...kaller.appspotmail.com>
To:     hverkuil@...all.nl, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, mchehab@...nel.org,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] memory leak in hdcs_probe_1020

Hello,

syzbot found the following issue on:

HEAD commit:    0f4498ce Merge tag 'for-5.12/dm-fixes-2' of git://git.kern..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17e1514ad00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=49f2683f4e7a4347
dashboard link: https://syzkaller.appspot.com/bug?extid=990626a4ef6f043ed4cd
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=16fb3d9ed00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=117539aad00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+990626a4ef6f043ed4cd@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888110dd9f00 (size 64):
  comm "kworker/0:0", pid 5, jiffies 4294944081 (age 15.000s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 18 00 00 00  ................
    04 00 00 00 60 01 00 00 30 01 00 00 04 00 00 00  ....`...0.......
  backtrace:
    [<ffffffff8424c055>] kmalloc include/linux/slab.h:554 [inline]
    [<ffffffff8424c055>] hdcs_probe_1020 drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c:428 [inline]
    [<ffffffff8424c055>] hdcs_probe_1020.cold+0x39/0x96 drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c:413
    [<ffffffff82fe2db7>] stv06xx_config+0x107/0x190 drivers/media/usb/gspca/stv06xx/stv06xx.c:575
    [<ffffffff842427ca>] gspca_dev_probe2+0x359/0x6c5 drivers/media/usb/gspca/gspca.c:1529
    [<ffffffff84242b78>] gspca_dev_probe.cold+0x42/0x4a drivers/media/usb/gspca/gspca.c:1606
    [<ffffffff82ba7c87>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<ffffffff825f6079>] really_probe+0x159/0x4a0 drivers/base/dd.c:554
    [<ffffffff825f6444>] driver_probe_device+0x84/0x100 drivers/base/dd.c:740
    [<ffffffff825f6b5e>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:846
    [<ffffffff825f2ff7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<ffffffff825f66f2>] __device_attach+0x122/0x250 drivers/base/dd.c:914
    [<ffffffff825f4c96>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<ffffffff825f11e5>] device_add+0x5d5/0xc40 drivers/base/core.c:3242
    [<ffffffff82ba5229>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<ffffffff82bb568c>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<ffffffff82ba73ec>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<ffffffff825f6079>] really_probe+0x159/0x4a0 drivers/base/dd.c:554



---
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