Re: [PATCH] mm/kasan: Print frame description for stack bugs

From: Andrew Morton
Date: Tue May 21 2019 - 22:13:40 EST


On Sun, 19 May 2019 04:48:21 +0800 kbuild test robot <lkp@xxxxxxxxx> wrote:

> Hi Marco,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on linus/master]
> [also build test WARNING on v5.1 next-20190517]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/Marco-Elver/mm-kasan-Print-frame-description-for-stack-bugs/20190519-040214
> config: xtensa-allyesconfig (attached as .config)
> compiler: xtensa-linux-gcc (GCC) 8.1.0
> reproduce:
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # save the attached .config to linux build tree
> GCC_VERSION=8.1.0 make.cross ARCH=xtensa
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@xxxxxxxxx>
>

This, I assume?

--- a/mm/kasan/report.c~mm-kasan-print-frame-description-for-stack-bugs-fix
+++ a/mm/kasan/report.c
@@ -230,7 +230,7 @@ static void print_decoded_frame_descr(co
return;

pr_err("\n");
- pr_err("this frame has %zu %s:\n", num_objects,
+ pr_err("this frame has %lu %s:\n", num_objects,
num_objects == 1 ? "object" : "objects");

while (num_objects--) {
@@ -257,7 +257,7 @@ static void print_decoded_frame_descr(co
strreplace(token, ':', '\0');

/* Finally, print object information. */
- pr_err(" [%zu, %zu) '%s'", offset, offset + size, token);
+ pr_err(" [%lu, %lu) '%s'", offset, offset + size, token);
}
}

_