tree 4cd8fc342c9f407f83efdcf2b01a71a5501b6f54
parent 2600698345bce436c8e91f3d6734f23444e277b3
author Richard Purdie <richard.purdie@linuxfoundation.org> 1442619093 -0700
committer chrmhoffmann <chrmhoffmann@gmail.com> 1586074916 +0200

HID: core: Avoid uninitialized buffer access

commit 79b568b9d0c7c5d81932f4486d50b38efdd6da6d upstream.

hid_connect adds various strings to the buffer but they're all
conditional. You can find circumstances where nothing would be written
to it but the kernel will still print the supposedly empty buffer with
printk. This leads to corruption on the console/in the logs.

Ensure buf is initialized to an empty string.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
[dvhart: Initialize string to "" rather than assign buf[0] = NULL;]
Cc: Jiri Kosina <jikos@kernel.org>
Cc: linux-input@vger.kernel.org
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Zefan Li <lizefan@huawei.com>