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Re: [Qemu-devel] [PATCH 2/2] block/qapi: fix unbounded stack for dump_qd
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH 2/2] block/qapi: fix unbounded stack for dump_qdict |
Date: |
Wed, 9 Mar 2016 15:16:47 -0700 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
On 03/08/2016 10:56 PM, Peter Xu wrote:
> Using heap instead of stack for better safety.
>
> Signed-off-by: Peter Xu <address@hidden>
> ---
> block/qapi.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Reviewed-by: Eric Blake <address@hidden>
>
> diff --git a/block/qapi.c b/block/qapi.c
> index c4c2115..b798e35 100644
> --- a/block/qapi.c
> +++ b/block/qapi.c
> @@ -636,9 +636,8 @@ static void dump_qdict(fprintf_function func_fprintf,
> void *f, int indentation,
> for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
> QType type = qobject_type(entry->value);
> bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
> - char key[strlen(entry->key) + 1];
> + char *key = g_malloc(strlen(entry->key) + 1);
> int i;
> -
> /* replace dashes with spaces in key (variable) names */
> for (i = 0; entry->key[i]; i++) {
> key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
> @@ -650,6 +649,7 @@ static void dump_qdict(fprintf_function func_fprintf,
> void *f, int indentation,
> if (!composite) {
> func_fprintf(f, "\n");
> }
> + g_free(key);
> }
> }
>
>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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[Qemu-devel] [PATCH 2/2] block/qapi: fix unbounded stack for dump_qdict, Peter Xu, 2016/03/09
Re: [Qemu-devel] [PATCH 0/2] block/qapi: trivial fixes, Markus Armbruster, 2016/03/22