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From: Vladislav Shpilevoy via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Serge Petrenko <sergepetrenko@tarantool.org>, gorcunov@gmail.com
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH 2/2] box: fix uninitialized access to version_id in process_subscribe()
Date: Mon, 30 Aug 2021 23:38:59 +0200	[thread overview]
Message-ID: <385ccffc-abee-b0be-4805-addbff4efcd7@tarantool.org> (raw)
In-Reply-To: <8f2f052fe5c362de28a8e6b472c7608902be60a2.1630319507.git.sergepetrenko@tarantool.org>

Hi! Thanks for the patch!

> diff --git a/src/box/box.cc b/src/box/box.cc
> index 2c8113cbb..f98437d05 100644
> --- a/src/box/box.cc
> +++ b/src/box/box.cc
> @@ -2850,8 +2850,8 @@ box_process_subscribe(struct ev_io *io, struct xrow_header *header)
>  	struct tt_uuid replica_uuid = uuid_nil;
>  	struct tt_uuid peer_replicaset_uuid = uuid_nil;
>  	struct vclock replica_clock;
> -	uint32_t replica_version_id;
>  	vclock_create(&replica_clock);
> +	uint32_t replica_version_id = 0;

There seems to be an inconsistency in xrow_decode_subscribe(). It takes
multiple optional parameters, but only some of them are reset to default
values before the body is decoded.

- replicaset_uuid, instance_uuid, vclock, version_id are left untouched
if not found.

- anon, id_filter are nullified in the beginning.

Is there a reason why all the parameters can't be set to defaults / reset
right in xrow_decode_subscribe() before the body is decoded?

  reply	other threads:[~2021-08-30 21:39 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-30 10:33 [Tarantool-patches] [PATCH 0/2] replication: fix uninitialized replica_version_id access Serge Petrenko via Tarantool-patches
2021-08-30 10:33 ` [Tarantool-patches] [PATCH 1/2] box: remove unused variable in process_register() Serge Petrenko via Tarantool-patches
2021-08-30 10:33 ` [Tarantool-patches] [PATCH 2/2] box: fix uninitialized access to version_id in process_subscribe() Serge Petrenko via Tarantool-patches
2021-08-30 21:38   ` Vladislav Shpilevoy via Tarantool-patches [this message]
2021-08-31  9:17     ` Serge Petrenko via Tarantool-patches
2021-09-01 21:35       ` Vladislav Shpilevoy via Tarantool-patches
2021-08-30 14:55 ` [Tarantool-patches] [PATCH 0/2] replication: fix uninitialized replica_version_id access Cyrill Gorcunov via Tarantool-patches

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