From 7d973359427394a00d1d8778b352b67c9ff486d6 Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Sat, 24 Jan 2015 21:33:30 +0100
Subject: [PATCH] disk/AFsplitter: check argument validity before doing any
 allocs.

This avoids possible memory leaks.

Found by: Coverity scan.
---
 grub-core/disk/AFSplitter.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/grub-core/disk/AFSplitter.c b/grub-core/disk/AFSplitter.c
index 7e1bd5748..f5a8ddc61 100644
--- a/grub-core/disk/AFSplitter.c
+++ b/grub-core/disk/AFSplitter.c
@@ -72,13 +72,13 @@ AF_merge (const gcry_md_spec_t * hash, grub_uint8_t * src, grub_uint8_t * dst,
   grub_size_t i;
   grub_uint8_t *bufblock;
 
+  if (hash->mdlen > GRUB_CRYPTO_MAX_MDLEN || hash->mdlen == 0)
+    return GPG_ERR_INV_ARG;
+
   bufblock = grub_zalloc (blocksize);
   if (bufblock == NULL)
     return GPG_ERR_OUT_OF_MEMORY;
 
-  if (hash->mdlen > GRUB_CRYPTO_MAX_MDLEN || hash->mdlen == 0)
-    return GPG_ERR_INV_ARG;
-
   grub_memset (bufblock, 0, blocksize);
   for (i = 0; i < blocknumbers - 1; i++)
     {