BUG/MINOR: h3: Crash when h3 trace verbosity is "minimal"
This was due to a missing check in h3_trace() about the first argument
presence (connection) and h3_parse_settings_frm() which calls TRACE_LEAVE()
without any argument. Then this argument was dereferenced.
Must be backported to 2.6
diff --git a/src/h3.c b/src/h3.c
index 53372c5..28656fc 100644
--- a/src/h3.c
+++ b/src/h3.c
@@ -1248,6 +1248,9 @@
const struct qcc *qcc = conn ? conn->ctx : NULL;
const struct qcs *qcs = a2;
+ if (!qcc)
+ return;
+
if (src->verbosity > H3_VERB_CLEAN) {
chunk_appendf(&trace_buf, " : qcc=%p(F)", qcc);