qom: Plug memory leak in "info qom-tree"
Commite8c9e65816
"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:e8c9e65816
Signed-off-by: Markus Armbruster <armbru@redhat.com> Reported-by: Reviewed-by: Li Qiang <liq3ea@gmail.com> [sent same patch] Message-Id: <20200714160202.3121879-3-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
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@ -96,8 +96,10 @@ static void print_qom_composition(Monitor *mon, Object *obj, int indent);
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static int qom_composition_compare(const void *a, const void *b, void *ignore)
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static int qom_composition_compare(const void *a, const void *b, void *ignore)
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{
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{
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return g_strcmp0(a ? object_get_canonical_path_component(a) : NULL,
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g_autofree char *ac = object_get_canonical_path_component(a);
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b ? object_get_canonical_path_component(b) : NULL);
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g_autofree char *bc = object_get_canonical_path_component(b);
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return g_strcmp0(ac, bc);
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}
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}
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static int insert_qom_composition_child(Object *obj, void *opaque)
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static int insert_qom_composition_child(Object *obj, void *opaque)
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