From: Joonsoo Kim <js1304@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
kasan-dev@googlegroups.com,
Linux Memory Management List <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [PATCH v2] kasan/quarantine: fix bugs on qlist_move_cache()
Date: Fri, 1 Jul 2016 23:03:13 +0900 [thread overview]
Message-ID: <CAAmzW4PsBLLfcbOEfrtGogEfS7+9_EqOR5-Ho+UTi==8PwipMw@mail.gmail.com> (raw)
In-Reply-To: <1467381332-7282-1-git-send-email-iamjoonsoo.kim@lge.com>
2016-07-01 22:55 GMT+09:00 <js1304@gmail.com>:
> From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
>
> There are two bugs on qlist_move_cache(). One is that qlist's tail
> isn't set properly. curr->next can be NULL since it is singly linked
> list and NULL value on tail is invalid if there is one item on qlist.
> Another one is that if cache is matched, qlist_put() is called and
> it will set curr->next to NULL. It would cause to stop the loop
> prematurely.
>
> These problems come from complicated implementation so I'd like to
> re-implement it completely. Implementation in this patch is really
> simple. Iterate all qlist_nodes and put them to appropriate list.
>
> Unfortunately, I got this bug sometime ago and lose oops message.
> But, the bug looks trivial and no need to attach oops.
>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Please ignore this. It causes build warning. Please see v3.
Sorry for noise.
Thanks.
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next prev parent reply other threads:[~2016-07-01 14:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-01 7:53 [PATCH] kasan/quarantine: fix NULL pointer dereference bug js1304
2016-07-01 8:11 ` Andrey Ryabinin
2016-07-01 10:55 ` Kuthonuzo Luruo
2016-07-01 11:17 ` Andrey Ryabinin
2016-07-01 13:55 ` [PATCH v2] kasan/quarantine: fix bugs on qlist_move_cache() js1304
2016-07-01 14:03 ` Joonsoo Kim [this message]
2016-07-02 8:43 ` kbuild test robot
2016-07-01 13:57 ` [PATCH] kasan/quarantine: fix NULL pointer dereference bug Joonsoo Kim
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