linux-kernel - memory leak in hdcs_probe

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Date:   Fri, 26 Feb 2021 06:47:20 -0800
From:   syzbot <syzbot+e7f4c64a4248a0340c37@...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: memory leak in hdcs_probe_1x00

Hello,

syzbot found the following issue on:

HEAD commit:    2c87f7a3 Merge tag 'pwm/for-5.12-rc1' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16400946d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3dfc598676a6f0b5
dashboard link: https://syzkaller.appspot.com/bug?extid=e7f4c64a4248a0340c37
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=123a6632d00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1689a292d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e7f4c64a4248a0340c37@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff8881100c0300 (size 64):
  comm "kworker/0:3", pid 3861, jiffies 4294943205 (age 14.560s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 08 00 00 00  ................
    08 00 00 00 68 01 00 00 28 01 00 00 04 00 00 00  ....h...(.......
  backtrace:
    [<000000004eb4188f>] kmalloc include/linux/slab.h:554 [inline]
    [<000000004eb4188f>] hdcs_probe_1x00 drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c:371 [inline]
    [<000000004eb4188f>] hdcs_probe_1x00.cold+0x39/0xc1 drivers/media/usb/gspca/stv06xx/stv06xx_hdcs.c:356
    [<0000000031bd6da6>] stv06xx_config+0xdf/0x190 drivers/media/usb/gspca/stv06xx/stv06xx.c:571
    [<000000007be62196>] gspca_dev_probe2+0x359/0x6c5 drivers/media/usb/gspca/gspca.c:1529
    [<00000000afeef2a3>] gspca_dev_probe.cold+0x42/0x4a drivers/media/usb/gspca/gspca.c:1606
    [<000000006d63a9d3>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
    [<000000004f1fef67>] really_probe+0x159/0x4a0 drivers/base/dd.c:554
    [<00000000ced991e0>] driver_probe_device+0x84/0x100 drivers/base/dd.c:740
    [<000000001687c39d>] __device_attach_driver+0xee/0x110 drivers/base/dd.c:846
    [<0000000046da487b>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:431
    [<00000000df1d85bd>] __device_attach+0x122/0x250 drivers/base/dd.c:914
    [<00000000fa336975>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:491
    [<000000002214a827>] device_add+0x5d5/0xc40 drivers/base/core.c:3242
    [<00000000782f72d5>] usb_set_configuration+0x9d9/0xb90 drivers/usb/core/message.c:2164
    [<000000000815ea76>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
    [<0000000028850013>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
    [<000000004f1fef67>] really_probe+0x159/0x4a0 drivers/base/dd.c:554



---
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