linux-kernel - Re: [PATCH 3/7] regmap: Add a mutex to guard the sync operation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20110928125249.GH3279@opensource.wolfsonmicro.com>
Date:	Wed, 28 Sep 2011 13:52:50 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>
Cc:	linux-kernel@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>
Subject: Re: [PATCH 3/7] regmap: Add a mutex to guard the sync operation

On Wed, Sep 28, 2011 at 11:43:43AM +0100, Dimitris Papastamos wrote:

> +	mutex_lock(&map->sync_lock);
>  	dev_dbg(map->dev, "Syncing %s cache\n",
>  		map->cache_ops->name);
>  	name = map->cache_ops->name;
> @@ -254,6 +257,7 @@ int regcache_sync(struct regmap *map)
>  	}
>  out:
>  	trace_regcache_sync(map->dev, name, "stop");
> +	mutex_unlock(&map->sync_lock);

Shouldn't we either be taking the regmap lock when doing the sync or
otherwise guarding against something other than a cache sync?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/