[Tarantool-patches] [PATCH] Fix tuple leak in vy_build_recover_stmt

[Alexander V. Tikhonov]

Hi Kirill, I've checked all results in gitlab-ci, and no new degradations
found [1], patch LGTM.

[1] - https://gitlab.com/tarantool/tarantool/-/pipelines/215136994

On Wed, Nov 11, 2020 at 12:38:10PM +0300, Kirill Yukhin wrote:
> Variable `old` which contains tuple reference wasn't
> unrefed at all. Fix this.
> ---
> 
> Branch: https://github.com/tarantool/tarantool/tree/kyukhin/fix-vy-build-recover-leak
> Issue: N/A
> CI: https://gitlab.com/tarantool/tarantool/-/pipelines/212266538
> 
>  src/box/vinyl.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/src/box/vinyl.c b/src/box/vinyl.c
> index 57e2839..0ff1262 100644
> --- a/src/box/vinyl.c
> +++ b/src/box/vinyl.c
> @@ -4020,8 +4020,10 @@ vy_build_recover_stmt(struct vy_lsm *lsm, struct vy_lsm *pk,
>  	if (old_tuple != NULL) {
>  		delete = vy_stmt_new_surrogate_delete(lsm->mem_format,
>  						      old_tuple);
> -		if (delete == NULL)
> +		if (delete == NULL) {
> +			tuple_unref(old_tuple);
>  			return -1;
> +		}
>  	}
>  	enum iproto_type type = vy_stmt_type(mem_stmt);
>  	if (type == IPROTO_REPLACE || type == IPROTO_INSERT) {
> @@ -4045,6 +4047,9 @@ vy_build_recover_stmt(struct vy_lsm *lsm, struct vy_lsm *pk,
>  			goto err;
>  	}
>  
> +	if (old_tuple != NULL)
> +		tuple_unref(old_tuple);
> +
>  	/* Insert DELETE + INSERT into the LSM tree. */
>  	if (delete != NULL) {
>  		int rc = vy_build_insert_stmt(lsm, lsm->mem, delete, lsn);
> @@ -4061,6 +4066,8 @@ vy_build_recover_stmt(struct vy_lsm *lsm, struct vy_lsm *pk,
>  	return 0;
>  
>  err:
> +	if (old_tuple != NULL)
> +		tuple_unref(old_tuple);
>  	if (delete != NULL)
>  		tuple_unref(delete);
>  	return -1;
> -- 
> 2.11.0
>