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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>
This commit is contained in:
Aneesh Kumar K.V 2013-02-05 11:27:45 +05:30 committed by Anthony Liguori
parent ddcb73b778
commit facf98ad98
1 changed files with 4 additions and 0 deletions
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4
util/iov.c
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@ -304,6 +304,10 @@ void qemu_iovec_concat_iov(QEMUIOVector *dst,
{
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) {