From: Vladimir Sementsov-Ogievskiy Date: Mon, 25 Sep 2023 19:40:32 +0000 (+0300) Subject: libvhost-user.c: add assertion to vu_message_read_default X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a6f4d2ec42f3feb6c399f5760a2567ca78897bd7;p=qemu.git libvhost-user.c: add assertion to vu_message_read_default Explain Coverity that we are not going to overflow vmsg->fds. Signed-off-by: Vladimir Sementsov-Ogievskiy Message-Id: <20230925194040.68592-5-vsementsov@yandex-team.ru> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvhost-user/libvhost-user.c index 0469a50101..49b57c7ef4 100644 --- a/subprojects/libvhost-user/libvhost-user.c +++ b/subprojects/libvhost-user/libvhost-user.c @@ -322,6 +322,7 @@ vu_message_read_default(VuDev *dev, int conn_fd, VhostUserMsg *vmsg) if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { fd_size = cmsg->cmsg_len - CMSG_LEN(0); vmsg->fd_num = fd_size / sizeof(int); + assert(fd_size < VHOST_MEMORY_BASELINE_NREGIONS); memcpy(vmsg->fds, CMSG_DATA(cmsg), fd_size); break; }