crypto: padlock-sha - Fix stack alignment

[net-next-2.6.git] / drivers / crypto / padlock-sha.c

diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c
index 76cb6b345e7b4a732e99f1c86b8dfc175a64cb52..0af80577dc7bbfd9d80f276765e5afb7d218c067 100644 (file)
--- a/drivers/crypto/padlock-sha.c
+++ b/drivers/crypto/padlock-sha.c
@@ -24,6 +24,12 @@
 #include <asm/i387.h>
 #include "padlock.h"
 
+#ifdef CONFIG_64BIT
+#define STACK_ALIGN 16
+#else
+#define STACK_ALIGN 4
+#endif
+
 struct padlock_sha_desc {
        struct shash_desc fallback;
 };
@@ -64,7 +70,9 @@ static int padlock_sha1_finup(struct shash_desc *desc, const u8 *in,
        /* We can't store directly to *out as it may be unaligned. */
        /* BTW Don't reduce the buffer size below 128 Bytes!
         *     PadLock microcode needs it that big. */
-       char result[128] __attribute__ ((aligned(PADLOCK_ALIGNMENT)));
+       char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
+               ((aligned(STACK_ALIGN)));
+       char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
        struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
        struct sha1_state state;
        unsigned int space;
@@ -128,7 +136,9 @@ static int padlock_sha256_finup(struct shash_desc *desc, const u8 *in,
        /* We can't store directly to *out as it may be unaligned. */
        /* BTW Don't reduce the buffer size below 128 Bytes!
         *     PadLock microcode needs it that big. */
-       char result[128] __attribute__ ((aligned(PADLOCK_ALIGNMENT)));
+       char buf[128 + PADLOCK_ALIGNMENT - STACK_ALIGN] __attribute__
+               ((aligned(STACK_ALIGN)));
+       char *result = PTR_ALIGN(&buf[0], PADLOCK_ALIGNMENT);
        struct padlock_sha_desc *dctx = shash_desc_ctx(desc);
        struct sha256_state state;
        unsigned int space;