From: Qian Cai <cai@lca.pw>
To: Walter Wu <walter-zh.wu@mediatek.com>
Cc: Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
kasan-dev <kasan-dev@googlegroups.com>,
Linux-MM <linux-mm@kvack.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-mediatek@lists.infradead.org,
wsd_upstream <wsd_upstream@mediatek.com>
Subject: Re: [PATCH] kasan: fix the missing underflow in memmove and memcpy with CONFIG_KASAN_GENERIC=y
Date: Tue, 8 Oct 2019 05:47:30 -0400 [thread overview]
Message-ID: <B53A3CC0-CEA6-4E1C-BC38-19315D949F38@lca.pw> (raw)
In-Reply-To: <1570515358.4686.97.camel@mtksdccf07>
> On Oct 8, 2019, at 2:16 AM, Walter Wu <walter-zh.wu@mediatek.com> wrote:
>
> It is an undefined behavior to pass a negative numbers to
> memset()/memcpy()/memmove(), so need to be detected by KASAN.
Why can’t this be detected by UBSAN?
WARNING: multiple messages have this Message-ID (diff)
From: Qian Cai <cai@lca.pw>
To: Walter Wu <walter-zh.wu@mediatek.com>
Cc: wsd_upstream <wsd_upstream@mediatek.com>,
linux-mediatek@lists.infradead.org,
LKML <linux-kernel@vger.kernel.org>,
kasan-dev <kasan-dev@googlegroups.com>,
Linux-MM <linux-mm@kvack.org>,
Alexander Potapenko <glider@google.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [PATCH] kasan: fix the missing underflow in memmove and memcpy with CONFIG_KASAN_GENERIC=y
Date: Tue, 8 Oct 2019 05:47:30 -0400 [thread overview]
Message-ID: <B53A3CC0-CEA6-4E1C-BC38-19315D949F38@lca.pw> (raw)
In-Reply-To: <1570515358.4686.97.camel@mtksdccf07>
> On Oct 8, 2019, at 2:16 AM, Walter Wu <walter-zh.wu@mediatek.com> wrote:
>
> It is an undefined behavior to pass a negative numbers to
> memset()/memcpy()/memmove(), so need to be detected by KASAN.
Why can’t this be detected by UBSAN?
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next prev parent reply other threads:[~2019-10-08 9:47 UTC|newest]
Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-27 3:43 [PATCH] kasan: fix the missing underflow in memmove and memcpy with CONFIG_KASAN_GENERIC=y Walter Wu
2019-09-27 3:43 ` Walter Wu
2019-09-27 3:43 ` Walter Wu
2019-09-27 13:07 ` Dmitry Vyukov
2019-09-27 13:07 ` Dmitry Vyukov
2019-09-27 13:07 ` Dmitry Vyukov
2019-09-27 14:22 ` Walter Wu
2019-09-27 14:22 ` Walter Wu
2019-09-27 14:22 ` Walter Wu
2019-09-27 19:41 ` Dmitry Vyukov
2019-09-27 19:41 ` Dmitry Vyukov
2019-09-27 19:41 ` Dmitry Vyukov
2019-09-30 4:36 ` Walter Wu
2019-09-30 4:36 ` Walter Wu
2019-09-30 8:57 ` Marc Gonzalez
2019-09-30 8:57 ` Marc Gonzalez
2019-10-01 2:36 ` Walter Wu
2019-10-01 2:36 ` Walter Wu
2019-10-01 3:01 ` Dmitry Vyukov
2019-10-01 3:01 ` Dmitry Vyukov
2019-10-01 3:18 ` Walter Wu
2019-10-01 3:18 ` Walter Wu
2019-10-02 12:15 ` Walter Wu
2019-10-02 12:15 ` Walter Wu
2019-10-02 12:15 ` Walter Wu
2019-10-02 13:57 ` Dmitry Vyukov
2019-10-02 13:57 ` Dmitry Vyukov
2019-10-02 13:57 ` Dmitry Vyukov
2019-10-03 2:17 ` Walter Wu
2019-10-03 2:17 ` Walter Wu
2019-10-03 6:26 ` Dmitry Vyukov
2019-10-03 6:26 ` Dmitry Vyukov
2019-10-03 6:26 ` Dmitry Vyukov
2019-10-03 9:38 ` Walter Wu
2019-10-03 9:38 ` Walter Wu
2019-10-03 9:38 ` Walter Wu
2019-10-03 13:51 ` Walter Wu
2019-10-03 13:51 ` Walter Wu
2019-10-03 13:51 ` Walter Wu
2019-10-03 14:53 ` Dmitry Vyukov
2019-10-03 14:53 ` Dmitry Vyukov
2019-10-03 14:53 ` Dmitry Vyukov
2019-10-04 4:42 ` Walter Wu
2019-10-04 4:42 ` Walter Wu
2019-10-04 4:42 ` Walter Wu
2019-10-04 8:02 ` Walter Wu
2019-10-04 8:02 ` Walter Wu
2019-10-04 8:02 ` Walter Wu
2019-10-04 9:18 ` Dmitry Vyukov
2019-10-04 9:18 ` Dmitry Vyukov
2019-10-04 9:18 ` Dmitry Vyukov
2019-10-04 9:44 ` Walter Wu
2019-10-04 9:44 ` Walter Wu
2019-10-04 9:44 ` Walter Wu
2019-10-04 9:54 ` Dmitry Vyukov
2019-10-04 9:54 ` Dmitry Vyukov
2019-10-04 9:54 ` Dmitry Vyukov
2019-10-04 9:54 ` Dmitry Vyukov
2019-10-04 12:05 ` Walter Wu
2019-10-04 12:05 ` Walter Wu
2019-10-04 12:05 ` Walter Wu
2019-10-04 13:52 ` Dmitry Vyukov
2019-10-04 13:52 ` Dmitry Vyukov
2019-10-04 13:52 ` Dmitry Vyukov
2019-10-07 3:22 ` Walter Wu
2019-10-07 3:22 ` Walter Wu
2019-10-07 3:22 ` Walter Wu
2019-10-07 7:29 ` Dmitry Vyukov
2019-10-07 7:29 ` Dmitry Vyukov
2019-10-07 7:29 ` Dmitry Vyukov
2019-10-07 8:18 ` Walter Wu
2019-10-07 8:18 ` Walter Wu
2019-10-07 8:18 ` Walter Wu
2019-10-07 8:24 ` Dmitry Vyukov
2019-10-07 8:24 ` Dmitry Vyukov
2019-10-07 8:24 ` Dmitry Vyukov
2019-10-07 8:24 ` Dmitry Vyukov
2019-10-07 8:51 ` Walter Wu
2019-10-07 8:51 ` Walter Wu
2019-10-07 8:51 ` Walter Wu
2019-10-07 8:54 ` Dmitry Vyukov
2019-10-07 8:54 ` Dmitry Vyukov
2019-10-07 8:54 ` Dmitry Vyukov
2019-10-07 9:03 ` Walter Wu
2019-10-07 9:03 ` Walter Wu
2019-10-07 9:03 ` Walter Wu
2019-10-07 9:10 ` Dmitry Vyukov
2019-10-07 9:10 ` Dmitry Vyukov
2019-10-07 9:10 ` Dmitry Vyukov
2019-10-07 9:10 ` Dmitry Vyukov
2019-10-07 9:28 ` Walter Wu
2019-10-07 9:28 ` Walter Wu
2019-10-07 9:28 ` Walter Wu
2019-10-07 9:50 ` Walter Wu
2019-10-07 9:50 ` Walter Wu
2019-10-07 9:50 ` Walter Wu
2019-10-07 10:51 ` Dmitry Vyukov
2019-10-07 10:51 ` Dmitry Vyukov
2019-10-07 10:51 ` Dmitry Vyukov
2019-10-07 12:03 ` Walter Wu
2019-10-07 12:03 ` Walter Wu
2019-10-07 12:03 ` Walter Wu
2019-10-07 12:19 ` Dmitry Vyukov
2019-10-07 12:19 ` Dmitry Vyukov
2019-10-07 12:19 ` Dmitry Vyukov
2019-10-07 12:32 ` Walter Wu
2019-10-07 12:32 ` Walter Wu
2019-10-07 12:32 ` Walter Wu
2019-10-07 13:33 ` Dmitry Vyukov
2019-10-07 13:33 ` Dmitry Vyukov
2019-10-07 13:33 ` Dmitry Vyukov
2019-10-08 6:15 ` Walter Wu
2019-10-08 6:15 ` Walter Wu
2019-10-08 6:15 ` Walter Wu
2019-10-08 9:47 ` Qian Cai [this message]
2019-10-08 9:47 ` Qian Cai
2019-10-08 11:02 ` Walter Wu
2019-10-08 11:02 ` Walter Wu
2019-10-08 11:02 ` Walter Wu
2019-10-08 11:42 ` Qian Cai
2019-10-08 11:42 ` Qian Cai
2019-10-08 12:07 ` Walter Wu
2019-10-08 12:07 ` Walter Wu
2019-10-08 12:07 ` Walter Wu
2019-10-08 12:11 ` Dmitry Vyukov
2019-10-08 12:11 ` Dmitry Vyukov
2019-10-08 12:11 ` Dmitry Vyukov
2019-10-08 12:11 ` Dmitry Vyukov
2019-10-14 2:19 ` Walter Wu
2019-10-14 2:19 ` Walter Wu
2019-10-14 2:19 ` Walter Wu
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