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ef054e345e
n the 'radio->hdl.error' error handling, ctrl handler allocated by
v4l2_ctrl_new_std() does not released, and caused memory leak as
follows:
unreferenced object 0xffff888033d54200 (size 256):
comm "i2c-si470x-19", pid 909, jiffies 4294914203 (age 8.072s)
hex dump (first 32 bytes):
e8 69 11 03 80 88 ff ff 00 46 d5 33 80 88 ff ff .i.......F.3....
10 42 d5 33 80 88 ff ff 10 42 d5 33 80 88 ff ff .B.3.....B.3....
backtrace:
[<00000000086bd4ed>] __kmalloc_node+0x1eb/0x360
[<00000000bdb68871>] kvmalloc_node+0x66/0x120
[<00000000fac74e4c>] v4l2_ctrl_new+0x7b9/0x1c60 [videodev]
[<00000000693bf940>] v4l2_ctrl_new_std+0x19b/0x270 [videodev]
[<00000000c0cb91bc>] si470x_i2c_probe+0x2d3/0x9a0 [radio_si470x_i2c]
[<0000000056a6f01f>] i2c_device_probe+0x4d8/0xbe0
Fix the error handling path to avoid memory leak.
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: 8c081b6f9a ("media: radio: Critical v4l2 registration...")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.