linux-kernel - Re: [PATCH] arm64: bpf: fix mod-by-zero case

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Date:	Fri, 6 Nov 2015 17:00:16 +0000
From:	Catalin Marinas <catalin.marinas@....com>
To:	Zi Shen Lim <zlim.lnx@...il.com>
Cc:	Alexei Starovoitov <ast@...mgrid.com>,
	Yang Shi <yang.shi@...aro.org>, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org, Xi Wang <xi.wang@...il.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] arm64: bpf: fix mod-by-zero case

On Wed, Nov 04, 2015 at 08:43:59PM -0800, Zi Shen Lim wrote:
> Turns out in the case of modulo by zero in a BPF program:
> 	A = A % X;  (X == 0)
> the expected behavior is to terminate with return value 0.
> 
> The bug in JIT is exposed by a new test case [1].
> 
> [1] https://lkml.org/lkml/2015/11/4/499
> 
> Signed-off-by: Zi Shen Lim <zlim.lnx@...il.com>
> Reported-by: Yang Shi <yang.shi@...aro.org>
> Reported-by: Xi Wang <xi.wang@...il.com>
> CC: Alexei Starovoitov <ast@...mgrid.com>
> CC: Catalin Marinas <catalin.marinas@....com>
> Fixes: e54bcde3d69d ("arm64: eBPF JIT compiler")
> Cc: <stable@...r.kernel.org> # 3.18+
> ---
> This patch applies on top of "arm64: bpf: fix fiv-by-zero case" [2].

Both patches applied. Thanks.

-- 
Catalin
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