Re: [PATCH 2/2] pstore: fix memory leak when decompress using big_oops_buf
From: Kees Cook
Date: Wed Mar 12 2014 - 23:48:46 EST
On Wed, Mar 12, 2014 at 6:34 AM, Liu Shuo <shuox.liu@xxxxxxxxx> wrote:
> From: Liu ShuoX <shuox.liu@xxxxxxxxx>
>
> After sucessful decompressing, the buffer which pointed by 'buf' will be
> lost as 'buf' is overwrite by 'big_oops_buf' and will never be freed.
> Signed-off-by: Liu ShuoX <shuox.liu@xxxxxxxxx>
Thanks again!
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
-Kees
> ---
> fs/pstore/platform.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
> index 78c3c20..46d269e 100644
> --- a/fs/pstore/platform.c
> +++ b/fs/pstore/platform.c
> @@ -497,6 +497,7 @@ void pstore_get_records(int quiet)
> big_oops_buf_sz);
>
> if (unzipped_len > 0) {
> + kfree(buf);
> buf = big_oops_buf;
> size = unzipped_len;
> compressed = false;
> --
> 1.8.3.2
>
--
Kees Cook
Chrome OS Security
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/