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block: Fix nb_sectors check in bdrv_check_byte_request()
author
Kevin Wolf
<kwolf@redhat.com>
Mon, 14 Apr 2014 12:47:14 +0000
(14:47 +0200)
committer
Kevin Wolf
<kwolf@redhat.com>
Tue, 22 Apr 2014 09:57:02 +0000
(11:57 +0200)
nb_sectors is signed, check for negative values.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
block.c
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diff --git
a/block.c
b/block.c
index
990a754
..
3b7951e
100644
(file)
--- a/
block.c
+++ b/
block.c
@@
-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;
}