This fixes a possible read beyond the end of the temporary buffers used for
comparing data in the old and the new backing file.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
qemu-img.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/qemu-img.c b/qemu-img.c
index 250d892..258dc62 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -1225,7 +1225,7 @@ static int img_rebase(int argc, char **argv)
int pnum;
if (compare_sectors(buf_old + written * 512,
- buf_new + written * 512, n, &pnum))
+ buf_new + written * 512, n - written, &pnum))
{
ret = bdrv_write(bs, sector + written,
buf_old + written * 512, pnum);
--
1.6.6
