linux-kernel - Re: [PATCH] SUNRPC: Prevent kernel stack corruption on long values of flush

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Message-ID: <20120718230445.GA6561@umich.edu>
Date:	Wed, 18 Jul 2012 19:04:45 -0400
From:	Jim Rees <rees@...ch.edu>
To:	Sasha Levin <levinsasha928@...il.com>
Cc:	"J. Bruce Fields" <bfields@...ldses.org>,
	Trond.Myklebust@...app.com, davem@...emloft.net, davej@...hat.com,
	linux-nfs@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] SUNRPC: Prevent kernel stack corruption on long values
 of flush

Sasha Levin wrote:

  > Learning from what happened in this specific case, there are actually 2 issues here:
  > 
  >  - Array size was constant and too small, which is solved by the patch above.
  >  - We were blindly trying to sprintf() into that array, this issue may pop back up if someone decides to change the format string forgetting to modify the array declaration.
  > 

The original patch changed the sprintf to snprintf, and that still seems
like a good idea.
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