Messages in this thread Patch in this message | | | From | Darren Hart <> | Subject | [PATCH] hid-core: Avoid uninitialized buffer access | Date | Fri, 18 Sep 2015 16:31:33 -0700 |
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From: Richard Purdie <richard.purdie@linuxfoundation.org>
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 Cc: stable@vger.kernel.org Signed-off-by: Darren Hart <dvhart@linux.intel.com> --- drivers/hid/hid-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 70a11ac..c0fbf4e 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1611,7 +1611,7 @@ int hid_connect(struct hid_device *hdev, unsigned int connect_mask) "Multi-Axis Controller" }; const char *type, *bus; - char buf[64]; + char buf[64] = ""; unsigned int i; int len; int ret; -- 2.1.4
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