@@ -133,8 +133,18 @@ int inet_listen_opts(QemuOpts *opts, int port_offset, Error **errp)
ai.ai_family = PF_INET6;
/* lookup */
- if (port_offset)
- snprintf(port, sizeof(port), "%d", atoi(port) + port_offset);
+ if (port_offset) {
+ int baseport;
+ if (parse_uint_full(port, &baseport, 10) < 0) {
+ error_setg(errp, "can't convert to a number: %s", port);
+ return -1;
+ }
+ if (baseport < 0 || baseport + port_offset > 65535) {
+ error_setg(errp, "port %s out of range", port);
+ return -1;
+ }
+ snprintf(port, sizeof(port), "%d", baseport + port_offset);
+ }
rc = getaddrinfo(strlen(addr) ? addr : NULL, port, &ai, &res);
if (rc != 0) {
error_setg(errp, "address resolution failed for %s:%s: %s", addr, port,
Don't use atoi() function which doesn't detect errors, switch to strtol and error out on failures. Also add a range check while being at it. [ v2: use parse_uint_full instead of strtol ] Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> --- util/qemu-sockets.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-)