kunit: ubsan integration

Integrates UBSAN into the KUnit testing framework. It fails KUnit tests
whenever it reports undefined behavior.

When CONFIG_KUNIT=n, nothing is printed or even formatted, so this has
no behavioral impact outside of tests.

kunit_fail_current_test() effectively does a pr_err() as well, so
there's some slight duplication, but it also ensures an error is
recorded in the debugfs entry for the running KUnit test.

Print a shorter version of the message to make it less spammy.

Co-developed-by: Daniel Latypov <dlatypov@google.com>
Signed-off-by: Daniel Latypov <dlatypov@google.com>
Signed-off-by: Uriel Guajardo <urielguajardo@google.com>
Reviewed-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

diff --git a/lib/ubsan.c b/lib/ubsan.c
index 26229973049d364ea84e25e1d304f67a6cb56b44..bdc380ff5d5c712db353f43102e9563594b44a6b 100644 (file)
--- 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-bug.h>
 
 #include "ubsan.h"
 
@@ -141,6 +142,8 @@ static void ubsan_prologue(struct source_location *loc, const char *reason)
                "========================================\n");
        pr_err("UBSAN: %s in %s:%d:%d\n", reason, loc->file_name,
                loc->line & LINE_MASK, loc->column & COLUMN_MASK);
+
+       kunit_fail_current_test("%s in %s", reason, loc->file_name);
 }
 
 static void ubsan_epilogue(void)