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block: Fix nb_sectors check in bdrv_check_byte_request() 

nb_sectors is signed, check for negative values.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2014-04-14 14:47:14 +02:00
parent 2d03b49c3f
commit 54db38a479
1 changed files with 1 additions and 1 deletions
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block.c
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@ -2601,7 +2601,7 @@ 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;
}