fortify: Detect struct member overflows in memcpy() at compile-time

[sfrench/cifs-2.6.git] / lib / string_helpers.c

diff --git a/lib/string_helpers.c b/lib/string_helpers.c
index 90f9f1b7afecd5bedd909dde28522cf20fa84d35..4f877e9551d5b7116b5e1f028c1eab4d19516c5f 100644 (file)
--- a/lib/string_helpers.c
+++ b/lib/string_helpers.c
@@ -968,6 +968,12 @@ void memcpy_and_pad(void *dest, size_t dest_len, const void *src, size_t count,
 EXPORT_SYMBOL(memcpy_and_pad);
 
 #ifdef CONFIG_FORTIFY_SOURCE
+/* These are placeholders for fortify compile-time warnings. */
+void __read_overflow2_field(size_t avail, size_t wanted) { }
+EXPORT_SYMBOL(__read_overflow2_field);
+void __write_overflow_field(size_t avail, size_t wanted) { }
+EXPORT_SYMBOL(__write_overflow_field);
+
 void fortify_panic(const char *name)
 {
        pr_emerg("detected buffer overflow in %s\n", name);