Re: [PATCH] secret: Check length of value in secret object

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On Tue, Jan 14, 2025 at 03:06:09PM +0100, Adam Julis wrote:
> Ensure that the value in the secret object is validated not only for NULL
> but also for its size. An empty value may not always be NULL, if it has
> been manually deleted from the .base64 file.

This sounds a bit wierd - can you explain in more detail what the bug
scenario is ?

> Signed-off-by: Adam Julis <ajulis@xxxxxxxxxx>
> ---
>  src/conf/virsecretobj.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/src/conf/virsecretobj.c b/src/conf/virsecretobj.c
> index 455798d414..3cb1ec2b4b 100644
> --- a/src/conf/virsecretobj.c
> +++ b/src/conf/virsecretobj.c
> @@ -719,7 +719,7 @@ virSecretObjGetValue(virSecretObj *obj)
>      virSecretDef *def = obj->def;
>      unsigned char *ret = NULL;
>  
> -    if (!obj->value) {
> +    if (!obj->value || (obj->value_size < 1 )) {

My gut feeling is that if there is a bug, then it lies in whatever
code created the non-NULL obj->value PTR, while setting value_size == 0

IOW, fix the place that created the bad data originally, rather than
the place were we access it.


With regards,
Daniel
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