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Date: Mon, 8 Jan 2018 23:52:27 +0100
From: Thomas Klausner <tk@HIDDEN>
To: 29940 <at> debbugs.gnu.org
Subject: Re: bug#29940: Acknowledgement (guile-2.2.3 does not work pax
mprotect)
Message-ID: <20180108225227.3rhewyjmictlldnm@danbala>
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<sfid-+20180102-101108-+008.55-1@HIDDEN>
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Jörg Sonnenberger just committed the attached patch to pkgsrc, which
fixes the problem for me as well, with the commit message:
"Use correct mmap permissions for later PROT_WRITE mprotect."
Thomas
--axuchxmhdxj2z7d6
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="patch-libguile_loader.c"
$NetBSD: patch-libguile_loader.c,v 1.1 2018/01/08 22:37:08 joerg Exp $
--- libguile/loader.c.orig 2018-01-08 16:21:04.790894906 +0000
+++ libguile/loader.c
@@ -484,7 +484,7 @@ map_file_contents (int fd, size_t len, i
char *data;
#ifdef HAVE_SYS_MMAN_H
- data = mmap (NULL, len, PROT_READ, MAP_PRIVATE, fd, 0);
+ data = mmap (NULL, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
if (data == MAP_FAILED)
SCM_SYSERROR;
*is_read_only = 1;
--axuchxmhdxj2z7d6--
bug-guile@HIDDEN:bug#29940; Package guile.
Full text available.Received: (at 29940) by debbugs.gnu.org; 8 Jan 2018 10:42:26 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jan 08 05:42:26 2018 Received: from localhost ([127.0.0.1]:40233 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1eYUss-0000SB-9K for submit <at> debbugs.gnu.org; Mon, 08 Jan 2018 05:42:26 -0500 Received: from danbala.ifoer.tuwien.ac.at ([128.130.168.114]:52191) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <wiz@HIDDEN>) id 1eYUsq-0000S1-89 for 29940 <at> debbugs.gnu.org; Mon, 08 Jan 2018 05:42:25 -0500 Received: by danbala.ifoer.tuwien.ac.at (Postfix, from userid 116) id 02B5BA5AC; Mon, 8 Jan 2018 11:42:23 +0100 (CET) Date: Mon, 8 Jan 2018 11:42:22 +0100 From: Thomas Klausner <tk@HIDDEN> To: 29940 <at> debbugs.gnu.org Subject: Re: bug#29940: Acknowledgement (guile-2.2.3 does not work pax mprotect) Message-ID: <20180108104222.a5g7fnjbvqspesmm@danbala> References: <20180102091028.wbspwmhiepdrxwsr@danbala> <sfid-+20180102-101108-+008.55-1@HIDDEN> <handler.29940.B.151488425022993.ack <at> debbugs.gnu.org> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="csephjqpp7japrig" Content-Disposition: inline In-Reply-To: <handler.29940.B.151488425022993.ack <at> debbugs.gnu.org> X-Spam-Score: 0.2 (/) X-Debbugs-Envelope-To: 29940 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: 0.2 (/) --csephjqpp7japrig Content-Type: text/plain; charset=us-ascii Content-Disposition: inline The attached patch is a workaround: we can mark the guile binary to not use the PAX mprotect feature using paxctl +m. On Linux, paxctl has different flags, so I wrapped it in an "if", and it uses knowledge of libtool internals, so it is not a good idea to integrate this patch as-is. Better would be of course to make guile work with PAX mprotect. Thomas --csephjqpp7japrig Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="patch-libguile_Makefile.in" $NetBSD: patch-libguile_Makefile.in,v 1.1 2018/01/08 10:39:45 wiz Exp $ Fix build on NetBSD>=8. --- libguile/Makefile.in.orig 2017-11-06 09:12:56.000000000 +0000 +++ libguile/Makefile.in @@ -2444,6 +2444,8 @@ clean-noinstPROGRAMS: guile$(EXEEXT): $(guile_OBJECTS) $(guile_DEPENDENCIES) $(EXTRA_guile_DEPENDENCIES) @rm -f guile$(EXEEXT) $(AM_V_CCLD)$(guile_LINK) $(guile_OBJECTS) $(guile_LDADD) $(LIBS) + if [ `uname -s` = "NetBSD" ]; then paxctl +m .libs/guile$(EXEEXT); fi + install-binSCRIPTS: $(bin_SCRIPTS) @$(NORMAL_INSTALL) @list='$(bin_SCRIPTS)'; test -n "$(bindir)" || list=; \ --csephjqpp7japrig--
bug-guile@HIDDEN:bug#29940; Package guile.
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From: Thomas Klausner <tk@HIDDEN>
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Subject: guile-2.2.3 does not work pax mprotect
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Hi!
guile-2.2.3 does not compile on NetBSD 8 and NetBSD-current.
During build, it writes stuff like this for basically every file:
gmake[2]: Entering directory '/scratch/lang/guile22/work/guile-2.2.3/bootstrap'
BOOTSTRAP GUILEC ice-9/eval.go
;;; WARNING: loading compiled file /scratch/lang/guile22/work/guile-2.2.3/prebuilt/64-bit-little-endian/ice-9/eval.go failed:
;;; Throw to key system-error with args ("load-thunk-from-memory" "~A" ("Permission denied") (13))
wrote `ice-9/eval.go'
When I turn off PaX mprotect, the build succeeds.
PaX mprotect is a security feature that forbids memory pages that are
writable and executable, and some memory protection changes that would
allow this. Other programs/libraries (e.g. libffi) needed to be fixed
for this.
Can you please fix this in guile-2.2.x?
(guile-2.0.14 builds fine on such a system.)
Thanks,
Thomas
Thomas Klausner <tk@HIDDEN>:bug-guile@HIDDEN.
Full text available.bug-guile@HIDDEN:bug#29940; Package guile.
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