From: Steve Grubb <sgrubb@redhat.com>
To: linux-audit@redhat.com
Subject: audit user space build problems
Date: Mon, 21 Feb 2022 16:50:22 -0500 [thread overview]
Message-ID: <2126549.NgBsaNRSFp@x2> (raw)
Hello,
Recently, distributions moved to building against gcc-12 for their latest OS
composes. It's been found in at least 2 distributions that the user space
package is failing to build. It's natural to think this is related to gcc-12
since it's the obvious change.
However, the problem is a combination of 2 things:
1) SWIG is making buggy code
2) The kernel changed to using flexible array members
The issue specifically is with struct audit_rules_data. At the bottom, it was
using buf[0]; But on 5.17, it uses buf[]; It turns out that gcc-12 is just
a coincidence and anything using gcc-12 also has the newest kernel.
The options are:
1) Report this as a SWIG bug and wait
2) Rewrite the libaudit python bindings to not use SWIG
3) Ask for buf[0]; to be reinstated in the kernel.
Of these, I think option 2 is the only viable long term option. It will take
some time to write new python bindings that preserve the SWIG api.
A short term fix might be for distros to copy the kernel header into the lib
directory and patch it to restore buf[0];, then change libaudit.c to include
"audit.h" instead of <linux/audit.h>. There may be other approaches.
Just wanted to let everyone know that new builds in distributions are running
into a problem. And a real fix will take a while.
Best,
-Steve
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next reply other threads:[~2022-02-21 21:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-21 21:50 Steve Grubb [this message]
2022-02-24 3:39 ` audit user space build problems Steve Grubb
2022-02-28 15:37 ` Steve Grubb
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