From: "Theodore Ts'o" <tytso@mit.edu>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Chen Feng <puck.chen@hisilicon.com>,
zhaoyukun@huawei.com, arnd@arndb.de,
linux-kernel@vger.kernel.org, suzhuangluan@hisilicon.com,
dan.zhao@hisilicon.com
Subject: Re: [PATCH RFC] random: fix syzkaller fuzzer test int overflow
Date: Tue, 24 Oct 2017 06:25:28 -0400 [thread overview]
Message-ID: <20171024102528.7oywdwjriesoh3mk@thunk.org> (raw)
In-Reply-To: <20171024090927.GA20625@kroah.com>
On Tue, Oct 24, 2017 at 11:09:27AM +0200, Greg KH wrote:
> On Tue, Oct 24, 2017 at 03:44:17PM +0800, Chen Feng wrote:
> > [pid:11940,cpu6,syz-executor][flp_ioctl]cmd[0x1]
> > Restart is not permit
> > =================================================================
> > UBSAN: Undefined behaviour in
> > kernel/linux-4.4/drivers/char/random.c:676:19
> > signed integer overflow:
> > 2147483645 + 268435455 cannot be represented in type 'int'
> > CPU: 4 PID: 11941 Comm: syz-executor Not tainted 4.4.76+ #2
>
> Does this also happen on 4.14-rc6?
No. It was fixed in 4.8, by commit 86a574de4590: "random: strengthen
input validation for RNDADDTOENTCNT".
- Ted
next prev parent reply other threads:[~2017-10-24 10:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-24 7:44 Chen Feng
2017-10-24 9:09 ` Greg KH
2017-10-24 9:24 ` Chen Feng
2017-10-24 9:57 ` Greg KH
2017-10-24 10:25 ` Theodore Ts'o [this message]
2017-10-25 6:30 ` Chen Feng
2017-10-25 6:56 ` Greg KH
2017-10-25 7:08 ` Chen Feng
2017-10-25 8:49 ` Theodore Ts'o
2017-10-26 8:25 ` Chen Feng
2017-10-26 15:04 ` Theodore Ts'o
2017-10-28 3:22 ` Chen Feng
2017-10-29 18:25 ` Theodore Ts'o
2017-10-30 7:39 ` Greg KH
2017-10-30 9:11 ` Theodore Ts'o
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