diff options
Diffstat (limited to 'kernel/kcsan/test.c')
| -rw-r--r-- | kernel/kcsan/test.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/kcsan/test.c b/kernel/kcsan/test.c index cc6000239dc0..d26a052d3383 100644 --- a/kernel/kcsan/test.c +++ b/kernel/kcsan/test.c @@ -92,6 +92,16 @@ static bool test_matching_access(void) return false; if (WARN_ON(matching_access(9, 1, 10, 1))) return false; + + /* + * An access of size 0 could match another access, as demonstrated here. + * Rather than add more comparisons to 'matching_access()', which would + * end up in the fast-path for *all* checks, check_access() simply + * returns for all accesses of size 0. + */ + if (WARN_ON(!matching_access(8, 8, 12, 0))) + return false; + return true; } |