From cf49a6a00c19cabf4006d4f82bef26345043e7b5 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Wed, 5 Jun 2013 14:19:29 +0200
Subject: [PATCH] qemu-io: Handle cvtnum() errors in 'alloc'

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 qemu-io.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/qemu-io.c b/qemu-io.c
index 8a719a881c..b4f56fc59f 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -1596,7 +1596,10 @@ static int alloc_f(int argc, char **argv)
     int ret;
 
     offset = cvtnum(argv[1]);
-    if (offset & 0x1ff) {
+    if (offset < 0) {
+        printf("non-numeric offset argument -- %s\n", argv[1]);
+        return 0;
+    } else if (offset & 0x1ff) {
         printf("offset %" PRId64 " is not sector aligned\n",
                offset);
         return 0;
@@ -1604,6 +1607,10 @@ static int alloc_f(int argc, char **argv)
 
     if (argc == 3) {
         nb_sectors = cvtnum(argv[2]);
+        if (nb_sectors < 0) {
+            printf("non-numeric length argument -- %s\n", argv[2]);
+            return 0;
+        }
     } else {
         nb_sectors = 1;
     }
-- 
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