qemu/iovec: Don't assert if sbytes is zero
Since these values can possibly be sent from guest (for hw/9pfs), do a sanity check
on them. A 9p write request with 0 bytes caused qemu to abort without this patch
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/util/iov.c b/util/iov.c
index c0f5c56..fbe675d 100644
--- a/util/iov.c
+++ b/util/iov.c
@@ -304,6 +304,10 @@
{
int i;
size_t done;
+
+ if (!sbytes) {
+ return;
+ }
assert(dst->nalloc != -1);
for (i = 0, done = 0; done < sbytes && i < src_cnt; i++) {
if (soffset < src_iov[i].iov_len) {