linux-kernel - Re: [PATCH 2/2] kunit: ubsan integration

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Date:   Thu, 3 Sep 2020 08:38:25 -0400
From:   Qian Cai <cai@....pw>
To:     skhan@...uxfoundation.org, sfr@...b.auug.org.au
Cc:     brendanhiggins@...gle.com, urielguajardo@...gle.com,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kunit-dev@...glegroups.com, linux-next@...r.kernel.org
Subject: Re: [PATCH 2/2] kunit: ubsan integration

On Wed, Sep 02, 2020 at 08:52:24AM -0400, Qian Cai wrote:
> On Thu, Aug 06, 2020 at 05:43:26PM +0000, Uriel Guajardo wrote:
> > Integrates UBSAN into the KUnit testing framework. It fails KUnit tests
> > whenever it reports undefined behavior.
> > 
> > Signed-off-by: Uriel Guajardo <urielguajardo@...gle.com>
> 
> It looks like this patch had been merged into linux-next but the "[PATCH 1/2]
> kunit: support failure from dynamic analysis tools" did not. Hence, it caused a
> compiling failure.
> 
> lib/ubsan.c: In function ‘ubsan_prologue’:
> lib/ubsan.c:141:2: error: implicit declaration of function ‘kunit_fail_current_test’; did you mean ‘kunit_init_test’? [-Werror=implicit-function-declaration]
>   kunit_fail_current_test();
>   ^~~~~~~~~~~~~~~~~~~~~~~
>   kunit_init_test
> cc1: some warnings being treated as errors

Stephen, Shuah, can you revert this commit or pick up its dependency as well?

https://lore.kernel.org/linux-kselftest/20200813205722.1384108-1-urielguajardojr@gmail.com/

Still seeing this on today's linux-next build.

> 
> > ---
> >  lib/ubsan.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/lib/ubsan.c b/lib/ubsan.c
> > index cb9af3f6b77e..1460e2c828c8 100644
> > --- a/lib/ubsan.c
> > +++ b/lib/ubsan.c
> > @@ -14,6 +14,7 @@
> >  #include <linux/types.h>
> >  #include <linux/sched.h>
> >  #include <linux/uaccess.h>
> > +#include <kunit/test.h>
> >  
> >  #include "ubsan.h"
> >  
> > @@ -137,6 +138,7 @@ static void ubsan_prologue(struct source_location *loc, const char *reason)
> >  {
> >  	current->in_ubsan++;
> >  
> > +	kunit_fail_current_test();
> >  	pr_err("========================================"
> >  		"========================================\n");
> >  	pr_err("UBSAN: %s in %s:%d:%d\n", reason, loc->file_name,
> > -- 
> > 2.28.0.163.g6104cc2f0b6-goog
> >