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authorAlexander Potapenko2019-07-17 01:27:42 +0200
committerLinus Torvalds2019-07-17 04:23:22 +0200
commit4ab7ace465466d25c12cee9854e7140077e208cb (patch)
treeebd221f79fcff07301b015dc5a8d6895997c724f /lib
parentlib/test_meminit.c: fix -Wmaybe-uninitialized false positive (diff)
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lib/test_meminit.c: minor test fixes
Fix the following issues in test_meminit.c: - |size| in fill_with_garbage_skip() should be signed so that it doesn't overflow if it's not aligned on sizeof(*p); - fill_with_garbage_skip() should actually skip |skip| bytes; - do_kmem_cache_size() should deallocate memory in the RCU case. Link: http://lkml.kernel.org/r/20190626133135.217355-1-glider@google.com Fixes: 7e659650cbda ("lib: introduce test_meminit module") Fixes: 94e8988d91c7 ("lib/test_meminit.c: fix -Wmaybe-uninitialized false positive") Signed-off-by: Alexander Potapenko <glider@google.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/test_meminit.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/test_meminit.c b/lib/test_meminit.c
index 7ae2183ff1f4..62d19f270cad 100644
--- a/lib/test_meminit.c
+++ b/lib/test_meminit.c
@@ -38,15 +38,14 @@ static int __init count_nonzero_bytes(void *ptr, size_t size)
}
/* Fill a buffer with garbage, skipping |skip| first bytes. */
-static void __init fill_with_garbage_skip(void *ptr, size_t size, size_t skip)
+static void __init fill_with_garbage_skip(void *ptr, int size, size_t skip)
{
- unsigned int *p = (unsigned int *)ptr;
+ unsigned int *p = (unsigned int *)((char *)ptr + skip);
int i = 0;
- if (skip) {
- WARN_ON(skip > size);
- p += skip;
- }
+ WARN_ON(skip > size);
+ size -= skip;
+
while (size >= sizeof(*p)) {
p[i] = GARBAGE_INT;
i++;
@@ -227,6 +226,7 @@ static int __init do_kmem_cache_size(size_t size, bool want_ctor,
if (buf_copy)
memcpy(buf_copy, buf, size);
+ kmem_cache_free(c, buf);
/*
* Check that |buf| is intact after kmem_cache_free().
* |want_zero| is false, because we wrote garbage to