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Date:   Wed, 30 Dec 2020 13:58:38 +0100
From:   Florian Westphal <fw@...len.de>
To:     Po-Hsu Lin <po-hsu.lin@...onical.com>
Cc:     netdev@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        shuah@...nel.org, steffen.klassert@...unet.com, fw@...len.de
Subject: Re: [PATCH] selftests: xfrm: fix test return value override issue in
 xfrm_policy.sh

Po-Hsu Lin <po-hsu.lin@...onical.com> wrote:
> When running this xfrm_policy.sh test script, even with some cases
> marked as FAIL, the overall test result will still be PASS:
> 
> $ sudo ./xfrm_policy.sh
> PASS: policy before exception matches
> FAIL: expected ping to .254 to fail (exceptions)
> PASS: direct policy matches (exceptions)
> PASS: policy matches (exceptions)
> FAIL: expected ping to .254 to fail (exceptions and block policies)
> PASS: direct policy matches (exceptions and block policies)
> PASS: policy matches (exceptions and block policies)
> FAIL: expected ping to .254 to fail (exceptions and block policies after hresh changes)
> PASS: direct policy matches (exceptions and block policies after hresh changes)
> PASS: policy matches (exceptions and block policies after hresh changes)
> FAIL: expected ping to .254 to fail (exceptions and block policies after hthresh change in ns3)
> PASS: direct policy matches (exceptions and block policies after hthresh change in ns3)
> PASS: policy matches (exceptions and block policies after hthresh change in ns3)
> FAIL: expected ping to .254 to fail (exceptions and block policies after htresh change to normal)
> PASS: direct policy matches (exceptions and block policies after htresh change to normal)
> PASS: policy matches (exceptions and block policies after htresh change to normal)
> PASS: policies with repeated htresh change
> $ echo $?
> 0
> 
> This is because the $lret in check_xfrm() is not a local variable.

Acked-by: Florian Westphal <fw@...len.de>

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