Your message dated Thu, 03 Nov 2011 22:19:16 +0000
with message-id <[email protected]>
and subject line Bug#644646: fixed in dietlibc 0.33~cvs20110918-5
has caused the Debian Bug report #644646,
regarding Accepted dietlibc 0.33~cvs20110918-4 (source all amd64)
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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644646: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=644646
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--- Begin Message ---
Source: dietlibc
Version: 0.33~cvs20110918-3
Severity: important
Hector Oron dixit:
> dietlibc (0.33~cvs20110918-4) unstable; urgency=low
> .
> * d/rules: disable tc523086.c test on ARM (segfaults on armhf)
We’re talking about the following test programme:
http://anonscm.debian.org/gitweb/?p=collab-maint/dietlibc.git;a=blob;f=debian/test/tc523086.c;h=d160eb1fa977b816d1880fbcea0bcd59bdc09890;hb=7e687dbd3ae266d0bd678aea1be273cd341b7dd6
Could you please try to find out exactly _why_ (or at least _where_)
this segfaults, as I’m not in the possession of access to an armhf
box – as far as I can see, the programme is valid C, and if this
segfaults on armhf, dietlibc is as broken there as on hppa and
should indeed FTBFS due to failing this test. (Please do also try
whether this segfaults with eglibc.)
Is the segfault in strstr?
Analysis:
13 if ((buf = malloc(32)) == NULL)
14 return (255);
Let’s assume the malloc base is 0x1000. Then buf can be anything
from 0x1000 to 0x101F (0x1020 would behave the same as 0x1000).
15 /* align */
16 s = (void *)((((ptrdiff_t)buf + 15) & ~15) + 12);
This assigns s a value of (depending on buf):
0x1000 → 0x100C (buf from 0x1000 to 0x101F) → 0x13 bytes available
0x1001 → 0x101C (buf from 0x1001 to 0x1020) → 0x04 bytes available
0x1010 → 0x101C (buf from 0x1010 to 0x102F) → 0x13 bytes available
0x101E → 0x102C (buf from 0x101E to 0x103D) → 0x11 bytes available
0x101F → 0x102C (buf from 0x101F to 0x103E) → 0x12 bytes available
17 s[0] = 'a';
18 s[1] = '\0';
This writes to *s and *(s+1); as the minimum available is 4 bytes, this
will be fine.
19
20 cp = strstr(Heuhaufen, s);
Heuhaufen is a constant string, so the only variable here is s,
which consists of the string "a" (NUL-terminated, 2 bytes long).
I fail to see where this can segfault, other than in the dietlibc
code (in which case the package RIGHTFULLY FTBFS), or in compiler-
generated code (unlikely).
Therefore I am raising Severity.
bye,
//mirabilos
--
Solange man keine schmutzigen Tricks macht, und ich meine *wirklich*
schmutzige Tricks, wie bei einer doppelt verketteten Liste beide
Pointer XORen und in nur einem Word speichern, funktioniert Boehm ganz
hervorragend. -- Andreas Bogk über boehm-gc in d.a.s.r
--- End Message ---
--- Begin Message ---
Source: dietlibc
Source-Version: 0.33~cvs20110918-5
We believe that the bug you reported is fixed in the latest version of
dietlibc, which is due to be installed in the Debian FTP archive:
dietlibc-doc_0.33~cvs20110918-5_all.deb
to main/d/dietlibc/dietlibc-doc_0.33~cvs20110918-5_all.deb
dietlibc_0.33~cvs20110918-5.debian.tar.gz
to main/d/dietlibc/dietlibc_0.33~cvs20110918-5.debian.tar.gz
dietlibc_0.33~cvs20110918-5.dsc
to main/d/dietlibc/dietlibc_0.33~cvs20110918-5.dsc
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Thorsten Glaser <[email protected]> (supplier of updated dietlibc package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA384
Format: 1.8
Date: Thu, 03 Nov 2011 21:33:39 +0000
Source: dietlibc
Binary: dietlibc-dev dietlibc-doc
Architecture: source all
Version: 0.33~cvs20110918-5
Distribution: experimental
Urgency: low
Maintainer: Hector Oron <[email protected]>
Changed-By: Thorsten Glaser <[email protected]>
Description:
dietlibc-dev - diet libc - a libc optimized for small size
dietlibc-doc - diet libc documentation - a libc optimized for small size
Closes: 644646
Changes:
dietlibc (0.33~cvs20110918-5) experimental; urgency=low
.
* Remove more mentions of the gone dynamic linking support
* quilt refresh all patches
* Pass -fno-stack-protector from diet to gcc when dietlibc is
compiled without SSP support because otherwise programs will
segfault, as dietlibc does not set up the registers needed
* Re-enable tc523086, as I believe the testcase is right, and
if an armhf buildd fails, the buildd is bad (Closes: #644646)
* Fix all lintian warnings except CVS in orig.tar.gz
- debian/copyright Format URI, fix format (spurious newline)
- add comment to d/patches/0014-sparc_v9-does-not-imply-arch64
- remove the .comment section when stripping binaries
* Honour DEB_BUILD_OPTIONS=nostrip as well
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