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-rw-r--r--block/bochs.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/block/bochs.c b/block/bochs.c
index bac81c42b7..f6a18f2bcb 100644
--- a/block/bochs.c
+++ b/block/bochs.c
@@ -199,7 +199,8 @@ static inline int seek_to_sector(BlockDriverState *bs, int64_t sector_num)
// read in bitmap for current extent
lseek(s->fd, bitmap_offset + (extent_offset / 8), SEEK_SET);
- read(s->fd, &bitmap_entry, 1);
+ if (read(s->fd, &bitmap_entry, 1) != 1)
+ return -1;
if (!((bitmap_entry >> (extent_offset % 8)) & 1))
{