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[Qemu-devel] [PULL 04/16] block: Check bdrv_getlength() return value in


From: Kevin Wolf
Subject: [Qemu-devel] [PULL 04/16] block: Check bdrv_getlength() return value in bdrv_make_zero()
Date: Wed, 23 Apr 2014 12:04:39 +0200

Signed-off-by: Kevin Wolf <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
---
 block.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/block.c b/block.c
index ec3fa50..da55877 100644
--- a/block.c
+++ b/block.c
@@ -2749,10 +2749,16 @@ int bdrv_write_zeroes(BlockDriverState *bs, int64_t 
sector_num,
  */
 int bdrv_make_zero(BlockDriverState *bs, BdrvRequestFlags flags)
 {
-    int64_t target_size = bdrv_getlength(bs) / BDRV_SECTOR_SIZE;
+    int64_t target_size;
     int64_t ret, nb_sectors, sector_num = 0;
     int n;
 
+    target_size = bdrv_getlength(bs);
+    if (target_size < 0) {
+        return target_size;
+    }
+    target_size /= BDRV_SECTOR_SIZE;
+
     for (;;) {
         nb_sectors = target_size - sector_num;
         if (nb_sectors <= 0) {
-- 
1.8.3.1




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