patch "tools: iio: iio_generic_buffer: make num_loops signed" added to staging-linus

This is a note to let you know that I've just added the patch titled

tools: iio: iio_generic_buffer: make num_loops signed

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From b119d3bc328e7a9574861ebe0c2110e2776c2de1 Mon Sep 17 00:00:00 2001
From: Martin Kelly <[email protected]>
Date: Fri, 11 Jan 2019 23:13:09 +0000
Subject: tools: iio: iio_generic_buffer: make num_loops signed

Currently, num_loops is unsigned, but it's set by strtoll, which returns a (signed) long long int. This could lead to overflow, and it also makes the check "num_loops < 0" always be false, since num_loops is unsigned. Setting num_loops to -1 to loop forever is almost working because num_loops is getting set to a very high number, but it's technically still incorrect.

Fix this issue by making num_loops signed. This also fixes an error found by Smatch.

---
 tools/iio/iio_generic_buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 3040830d7797..84545666a09c 100644
@@ -330,7 +330,7 @@ static const struct option longopts[] = {
 
 int main(int argc, char **argv)
 {
-	unsigned long long num_loops = 2;
+	long long num_loops = 2;
 	unsigned long timedelay = 1000000;
 	unsigned long buf_len = 128;
 

2.20.1