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From: Denis Efremov <efremov@linux.com>
To: cocci@systeme.lip6.fr
Subject: [Cocci] Backward compatibility issue
Date: Thu, 11 Feb 2021 15:09:14 +0300	[thread overview]
Message-ID: <0c2a01f3-e48b-fc67-78b4-f061026aec42@linux.com> (raw)

Hi, one of my patterns started to fail tests on latest coccinelle.
I've bisected the commit that introduces "error". It's:
commit db60e916633d2cb3ae31140364783fdf85ed10f4
"make information about SmPL iterator and declarer names available to the C parser"

To reproduce the error:
$ cd linux
$ git checkout 5b01014759991887b1e450c9def01e58c02ab81b
$ wget https://raw.githubusercontent.com/evdenis/cvehound/master/cvehound/cve/CVE-2016-9793.cocci
$ spatch -D detect --cocci-file CVE-2016-9793.cocci net/core/sock.c
# spatch before db60e916633d2cb3ae31140364783fdf85ed10f4 will find the match
net/core/sock.c:718:16-17: ERROR: CVE-2016-9793
net/core/sock.c:754:16-17: ERROR: CVE-2016-9793
...
# spatch >= db60e916633d2cb3ae31140364783fdf85ed10f4 will not match the same code

Thanks,
Denis
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             reply	other threads:[~2021-02-11 12:09 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-11 12:09 Denis Efremov [this message]
2021-02-11 13:46 ` [Cocci] Backward compatibility issue Julia Lawall
2021-02-12 14:04 ` Julia Lawall
2021-02-12 20:18   ` Denis Efremov
2021-02-13  7:46     ` Julia Lawall

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