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vl: fix leak of qdict_crumple return value 

Coverity reports that qemu_parse_config_group is returning without
unrefing the "crumpled" dictionary in case its top level item is a
list.  But actually the contract with qemu_record_config_group is
the same as for qemu_parse_config_group itself: if those function
need to stash the dictionary they get, they have to take a reference
themselves (currently this is never the case for either function).
Therefore, just add an unconditional qobject_unref(crumpled) to
qemu_parse_config_group.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-07-05 19:17:38 +02:00
parent 533883fd7e
commit 838e37007c
1 changed files with 9 additions and 4 deletions
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13
softmmu/vl.c
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@ -2193,12 +2193,17 @@ static void qemu_parse_config_group(const char *group, QDict *qdict,
if (!crumpled) {
return;
}
if (qobject_type(crumpled) != QTYPE_QDICT) {
assert(qobject_type(crumpled) == QTYPE_QLIST);
switch (qobject_type(crumpled)) {
case QTYPE_QDICT:
qemu_record_config_group(group, qobject_to(QDict, crumpled), false, errp);
break;
case QTYPE_QLIST:
error_setg(errp, "Lists cannot be at top level of a configuration section");
return;
break;
default:
g_assert_not_reached();
}
qemu_record_config_group(group, qobject_to(QDict, crumpled), false, errp);
qobject_unref(crumpled);
}
static void qemu_read_default_config_file(Error **errp)