netdev - Re: [PATCH net] tools: bpf_jit_disasm: fix segfault on disabled debugging log output

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Message-Id: <20150527.002421.933751602719615067.davem@davemloft.net>
Date:	Wed, 27 May 2015 00:24:21 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	daniel@...earbox.net
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net] tools: bpf_jit_disasm: fix segfault on disabled
 debugging log output

From: Daniel Borkmann <daniel@...earbox.net>
Date: Mon, 25 May 2015 14:08:03 +0200

> With recent debugging, I noticed that bpf_jit_disasm segfaults when
> there's no debugging output from the JIT compiler to the kernel log.
> 
> Reason is that when regexec(3) doesn't match on anything, start/end
> offsets are not being filled out and contain some uninitialized garbage
> from stack. Thus, we need zero out offsets first.
> 
> Signed-off-by: Daniel Borkmann <daniel@...earbox.net>

Applied, thanks Daniel.
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