[Qemu-devel] [PATCH 1/3] block: Fix nb_sectors check in bdrv_check_byte_request()

[Kevin Wolf]

nb_sectors is signed, check for negative values.

Signed-off-by: Kevin Wolf <address@hidden>
---
 block.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block.c b/block.c
index 75c3948..8be40bb 100644
--- a/block.c
+++ b/block.c
@@ -2609,7 +2609,7 @@ static int bdrv_check_byte_request(BlockDriverState *bs, 
int64_t offset,
 static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num,
                               int nb_sectors)
 {
-    if (nb_sectors > INT_MAX / BDRV_SECTOR_SIZE) {
+    if (nb_sectors < 0 || nb_sectors > INT_MAX / BDRV_SECTOR_SIZE) {
         return -EIO;
     }
 
-- 
1.8.3.1