BUILD: quic: fix potential NULL dereference on xprt_quic

A warning is triggered by gcc9 on this code path, which is the compiler
version used by ubuntu20.04 on the github CI.

This is linked to github issue #1445.

diff --git a/src/quic_sock.c b/src/quic_sock.c
index a574de0..38a8aab 100644 (file)
--- a/src/quic_sock.c
+++ b/src/quic_sock.c
@@ -191,9 +191,9 @@ void quic_sock_fd_iocb(int fd)
                return;
 
        rxbuf = MT_LIST_POP(&l->rx.rxbuf_list, typeof(rxbuf), mt_list);
-       buf = &rxbuf->buf;
-       if (!buf)
+       if (!rxbuf)
                goto out;
+       buf = &rxbuf->buf;
 
        params = &l->bind_conf->quic_params;
        max_sz = params->max_udp_payload_size;