This is a note to let you know that I've just added the patch titled tools: iio: iio_utils: fix digit calculation to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tools-iio-iio_utils-fix-digit-calculation.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 72b2aa38191bcba28389b0e20bf6b4f15017ff2b Mon Sep 17 00:00:00 2001 From: Matti Vaittinen <mazziesaccount@xxxxxxxxx> Date: Thu, 13 Oct 2022 15:04:04 +0300 Subject: tools: iio: iio_utils: fix digit calculation From: Matti Vaittinen <mazziesaccount@xxxxxxxxx> commit 72b2aa38191bcba28389b0e20bf6b4f15017ff2b upstream. The iio_utils uses a digit calculation in order to know length of the file name containing a buffer number. The digit calculation does not work for number 0. This leads to allocation of one character too small buffer for the file-name when file name contains value '0'. (Eg. buffer0). Fix digit calculation by returning one digit to be present for number '0'. Fixes: 096f9b862e60 ("tools:iio:iio_utils: implement digit calculation") Signed-off-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx> Link: https://lore.kernel.org/r/Y0f+tKCz+ZAIoroQ@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Cc: <Stable@xxxxxxxxxxxxxxx> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/iio/iio_utils.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/tools/iio/iio_utils.c +++ b/tools/iio/iio_utils.c @@ -543,6 +543,10 @@ static int calc_digits(int num) { int count = 0; + /* It takes a digit to represent zero */ + if (!num) + return 1; + while (num != 0) { num /= 10; count++; Patches currently in stable-queue which might be from mazziesaccount@xxxxxxxxx are queue-5.4/tools-iio-iio_utils-fix-digit-calculation.patch