Commit e8c9e65816 "qom: Make "info qom-tree" show children sorted" created a memory leak, because I didn't realize object_get_canonical_path_component()'s value needs to be freed.
Reproducer: $ qemu-system-x86_64 -nodefaults -display none -S -monitor stdio QEMU 5.0.50 monitor - type 'help' for more information (qemu) info qom-tree This leaks some 4500 path components, 12-13 characters on average, i.e. roughly 100kBytes depending on the allocator. A couple of hundred "info qom-tree" here, a couple of hundred there, and soon enough we're talking about real memory. Plug the leak. Fixes: e8c9e65816f5dbfe18ad3b2be938d0d8192d459a Signed-off-by: Markus Armbruster <arm...@redhat.com> --- qom/qom-hmp-cmds.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/qom/qom-hmp-cmds.c b/qom/qom-hmp-cmds.c index 9ed8bb1c9f..aaacadacca 100644 --- a/qom/qom-hmp-cmds.c +++ b/qom/qom-hmp-cmds.c @@ -96,8 +96,10 @@ static void print_qom_composition(Monitor *mon, Object *obj, int indent); static int qom_composition_compare(const void *a, const void *b, void *ignore) { - return g_strcmp0(a ? object_get_canonical_path_component(a) : NULL, - b ? object_get_canonical_path_component(b) : NULL); + g_autofree char *ac = object_get_canonical_path_component(a); + g_autofree char *bc = object_get_canonical_path_component(b); + + return g_strcmp0(ac, bc); } static int insert_qom_composition_child(Object *obj, void *opaque) -- 2.26.2