From: Jiri Slaby <jirislaby@kernel.org>
To: Yang Yingliang <yangyingliang@huawei.com>, b.zolnierkie@samsung.com
Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
linux-kernel@vger.kernel.org, 张云海 <zhangyunhai@nsfocus.com>
Subject: Re: [PATCH] vgacon: Fix an out-of-bounds in vgacon_scrollback_update()
Date: Fri, 31 Jul 2020 06:56:14 +0200 [thread overview]
Message-ID: <42bd14e3-ae2f-0c14-5d42-e3e7aeb11c78@kernel.org> (raw)
In-Reply-To: <3df26fed-5ade-df26-6417-380401b9650b@huawei.com>
Hi,
On 31. 07. 20, 5:23, Yang Yingliang wrote:
> void execute_one(void)
> {
> intptr_t res = 0;
> res = syz_open_dev(0xc, 4, 1);
open(/dev/tty1)
> if (res != -1)
> r[0] = res;
> *(uint16_t*)0x20000000 = 0xc;
> *(uint16_t*)0x20000002 = 0x373;
> *(uint16_t*)0x20000004 = 0x1442;
> syscall(__NR_ioctl, r[0], 0x5609ul, 0x20000000ul);
VT_RESIZE(12, 883)
> memcpy((void*)0x20003500, "\x7f\x45\x4c\x46\x00\x00\x00...
> syscall(__NR_write, r[0], 0x20003500ul, 0x381ul);
Write 381 bytes of some ELF to the tty.
OK, that's it. Thanks.
--
js
prev parent reply other threads:[~2020-07-31 4:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-13 10:57 Yang Yingliang
2020-07-30 11:04 ` Jiri Slaby
2020-07-30 13:24 ` Yang Yingliang
2020-07-30 13:38 ` Jiri Slaby
[not found] ` <3df26fed-5ade-df26-6417-380401b9650b@huawei.com>
2020-07-31 4:56 ` Jiri Slaby [this message]
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