lkl: explicitly uses asan mem* functions when kasan is enabled

tavip · tavip · commit d95ef31f9abe · 2026-05-10T04:25:25.000Z
Otherwise host memcpy can be used and bypasses kasan
interceptors. Unclear why the tests are passing in CI most of the time
without this fix. They do fail reliably on my local environment.

Signed-off-by: Octavian Purdila &lt;tavip@google.com&gt;
diff --git a/arch/lkl/include/asm/string.h b/arch/lkl/include/asm/string.h
@@ -51,9 +51,16 @@ static inline void *__memmove(void *dest, const void *src, size_t count)
 
 #else /* __SANITIZE_ADDRESS__ */
 
-#undef memcpy
+void *__asan_memset(void *addr, int c, ssize_t len);
+void *__asan_memmove(void *dest, const void *src, ssize_t len);
+void *__asan_memcpy(void *dest, const void *src, ssize_t len);
+
 #undef memset
+#define memset(s, c, n) __asan_memset(s, c, n)
 #undef memmove
+#define memmove(dst, src, len) __asan_memmove(dst, src, len)
+#undef memcpy
+#define memcpy(dst, src, len) __asan_memcpy(dst, src, len)
 
 #endif /* __SANITIZE_ADDRESS__ */
 
