svn commit: r264422 - head/sys/kern

[Konstantin Belousov]

On Sun, Apr 13, 2014 at 09:23:16PM +0000, Christian Brueffer wrote:
> Author: brueffer
> Date: Sun Apr 13 21:23:15 2014
> New Revision: 264422
> URL: http://svnweb.freebsd.org/changeset/base/264422
> 
> Log:
>   Free buf after usage.
>   
>   CID:		1199377
>   Found with:	Coverity Prevent(tm)
>   MFC after:	1 week
> 
> Modified:
>   head/sys/kern/imgact_elf.c
> 
> Modified: head/sys/kern/imgact_elf.c
> ==============================================================================
> --- head/sys/kern/imgact_elf.c	Sun Apr 13 21:13:33 2014	(r264421)
> +++ head/sys/kern/imgact_elf.c	Sun Apr 13 21:23:15 2014	(r264422)
> @@ -1746,8 +1746,10 @@ __elfN(note_threadmd)(void *arg, struct 
>  	size = 0;
>  	__elfN(dump_thread)(td, buf, &size);
>  	KASSERT(*sizep == size, ("invalid size"));
> -	if (size != 0 && sb != NULL)
> +	if (size != 0 && sb != NULL) {
>  		sbuf_bcat(sb, buf, size);
> +		free(buf, M_TEMP);
> +	}
>  	*sizep = size;
>  }
>  
Why conditioning free() on size != 0 ?
IMO free(buf) must be done always, since buf is initialized for the case
when malloc() is not called.
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