From: David Miller <davem@davemloft.net>
To: nelhage@ksplice.com
Cc: eric.dumazet@gmail.com, robert.olsson@its.uu.se,
andy.shevchenko@gmail.com, netdev@vger.kernel.org,
eugene@redhat.com
Subject: Re: [PATCH] pktgen: Limit how much data we copy onto the stack.
Date: Thu, 28 Oct 2010 11:32:37 -0700 (PDT) [thread overview]
Message-ID: <20101028.113237.193691913.davem@davemloft.net> (raw)
In-Reply-To: <1288279242-22153-1-git-send-email-nelhage@ksplice.com>
From: Nelson Elhage <nelhage@ksplice.com>
Date: Thu, 28 Oct 2010 11:20:42 -0400
> A program that accidentally writes too much data to the pktgen file can overflow
> the kernel stack and oops the machine. This is only triggerable by root, so
> there's no security issue, but it's still an unfortunate bug.
>
> printk() won't print more than 1024 bytes in a single call, anyways, so let's
> just never copy more than that much data. We're on a fairly shallow stack, so
> that should be safe even with CONFIG_4KSTACKS.
>
> Signed-off-by: Nelson Elhage <nelhage@ksplice.com>
Applied, thanks a lot.
prev parent reply other threads:[~2010-10-28 18:32 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-27 19:13 [PATCH] pktgen: Remove a dangerous debug print Nelson Elhage
2010-10-27 19:21 ` David Miller
2010-10-27 19:28 ` Nelson Elhage
2010-10-27 19:30 ` David Miller
2010-10-27 19:41 ` Eric Dumazet
2010-10-27 19:49 ` Nelson Elhage
2010-10-27 20:38 ` Ben Greear
2010-10-27 22:12 ` [patch] fix stack overflow in pktgen_if_write() Dan Carpenter
2010-10-27 22:40 ` Dan Carpenter
2010-10-27 22:43 ` [patch v2] " Dan Carpenter
2010-10-27 23:06 ` Nelson Elhage
2010-10-28 6:05 ` Dan Carpenter
2010-10-28 6:05 ` [patch v3] " Dan Carpenter
2010-10-28 15:22 ` Nelson Elhage
2010-10-28 16:28 ` Dan Carpenter
2010-10-28 16:30 ` Nelson Elhage
2010-10-28 23:11 ` Andi Kleen
2010-11-01 3:47 ` Dan Carpenter
2010-10-28 15:20 ` [PATCH] pktgen: Limit how much data we copy onto the stack Nelson Elhage
2010-10-28 18:32 ` David Miller [this message]
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