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[04/12] libvhost-user.c: add assertion to vu_message_read_default

Message ID 20230925194040.68592-5-vsementsov@yandex-team.ru
State New
Headers show
Series coverity fixes | expand

Commit Message

Vladimir Sementsov-Ogievskiy Sept. 25, 2023, 7:40 p.m. UTC 
Explain Coverity that we are not going to overflow vmsg->fds.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
---
 subprojects/libvhost-user/libvhost-user.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

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;
         }