GNU bug report logs -
#24210
diff3 in diffutils 3.4 is broken
Previous Next
To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 24210 in the body.
You can then email your comments to 24210 AT debbugs.gnu.org in the normal way.
Toggle the display of automated, internal messages from the tracker.
Report forwarded
to
bug-diffutils <at> gnu.org:
bug#24210; Package
diffutils.
(Fri, 12 Aug 2016 14:23:01 GMT)
Full text and
rfc822 format available.
Acknowledgement sent
to
Bastian Beischer <bastian.beischer <at> rwth-aachen.de>:
New bug report received and forwarded. Copy sent to
bug-diffutils <at> gnu.org.
(Fri, 12 Aug 2016 14:23:02 GMT)
Full text and
rfc822 format available.
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
Hello,
Please try to run diff3 from diffutils 3.4 as follows:
echo a > a.txt
echo b > b.txt
echo c > c.txt
diff3 a.txt b.txt c.txt
Expected output (with diff3 from diffutils 3.3):
====
1:1c
a
2:1c
b
3:1c
c
Actual output (with diff3 from diffutils 3.4):
====3
1:1c
2:1c
a
3:1c
c
There was only one commit in src/diff3.c between 3.3 and 3.4:
http://git.savannah.gnu.org/cgit/diffutils.git/commit/src?id=3b74a905c5460e7979c53273ac90345860d001a7
Reverting this commit fixes the issue.
Best
Bastian
--
Bastian Beischer
RWTH Aachen University of Technology
@RWTH Aachen
Office: 28 C 203
Phone: +49-241-80-27205
E-mail: beischer <at> physik.rwth-aachen.de
Address: I. Physikalisches Institut B, Sommerfeldstr. 14, D-52074 Aachen
@CERN
Office: Bdg 32-4-B12
Phone: +41-22-76-75750
E-mail: bastian.beischer <at> cern.ch
Address: CERN, CH-1211 Geneve 23
Information forwarded
to
bug-diffutils <at> gnu.org:
bug#24210; Package
diffutils.
(Fri, 12 Aug 2016 16:36:01 GMT)
Full text and
rfc822 format available.
Message #8 received at 24210 <at> debbugs.gnu.org (full text, mbox):
On Fri, Aug 12, 2016 at 7:22 AM, Bastian Beischer
<bastian.beischer <at> rwth-aachen.de> wrote:
> Hello,
>
> Please try to run diff3 from diffutils 3.4 as follows:
>
> echo a > a.txt
> echo b > b.txt
> echo c > c.txt
> diff3 a.txt b.txt c.txt
>
> Expected output (with diff3 from diffutils 3.3):
>
> ====
> 1:1c
> a
> 2:1c
> b
> 3:1c
> c
>
> Actual output (with diff3 from diffutils 3.4):
>
> ====3
> 1:1c
> 2:1c
> a
> 3:1c
> c
>
> There was only one commit in src/diff3.c between 3.3 and 3.4:
>
> http://git.savannah.gnu.org/cgit/diffutils.git/commit/src?id=3b74a905c5460e7979c53273ac90345860d001a7
>
> Reverting this commit fixes the issue.
Yikes.
Thank you for the report.
I confirm that that patch is erroneous, and will prepare a complete
fix (adding your test and a NEWS entry) shortly.
Looks like diffutils-3.5 will have to be released pretty soon.
Information forwarded
to
bug-diffutils <at> gnu.org:
bug#24210; Package
diffutils.
(Sun, 14 Aug 2016 05:16:02 GMT)
Full text and
rfc822 format available.
Message #11 received at 24210 <at> debbugs.gnu.org (full text, mbox):
[Message part 1 (text/plain, inline)]
On Fri, Aug 12, 2016 at 9:35 AM, Jim Meyering <jim <at> meyering.net> wrote:
> On Fri, Aug 12, 2016 at 7:22 AM, Bastian Beischer
> <bastian.beischer <at> rwth-aachen.de> wrote:
>> Hello,
>>
>> Please try to run diff3 from diffutils 3.4 as follows:
>>
>> echo a > a.txt
>> echo b > b.txt
>> echo c > c.txt
>> diff3 a.txt b.txt c.txt
...
>> There was only one commit in src/diff3.c between 3.3 and 3.4:
>>
>> http://git.savannah.gnu.org/cgit/diffutils.git/commit/src?id=3b74a905c5460e7979c53273ac90345860d001a7
>>
>> Reverting this commit fixes the issue.
>
> Yikes.
> Thank you for the report.
> I confirm that that patch is erroneous, and will prepare a complete
> fix (adding your test and a NEWS entry) shortly.
> Looks like diffutils-3.5 will have to be released pretty soon.
I've reverted that, added your test case and updated NEWS with a
commit in your name. Please review that first commit, in the attached.
diff3: fix heap use-after-free; add minimal diff3 test coverage
I have also made two other changes:
maint: require that commit messages be of a certain form
diff3: fix leaks, for real
The first of those enforces some modicum of sanity on commit log
messages, and might have prevented the offending commit. This is
largely copied from what I did for coreutils.
The final change actually does plug diff3's leaks. The minimal test
cases did not exercise the code to handle multiple diff blocks, so I
added one that does. One can argue that explicitly freeing some of
those buffers is not required, so I have made it so that nearly all of
the code added by this fix can be compiled out.
[diff3-leak-fix.diff (text/plain, attachment)]
Information forwarded
to
bug-diffutils <at> gnu.org:
bug#24210; Package
diffutils.
(Mon, 15 Aug 2016 00:15:02 GMT)
Full text and
rfc822 format available.
Message #14 received at 24210 <at> debbugs.gnu.org (full text, mbox):
On Sat, Aug 13, 2016 at 10:14 PM, Jim Meyering <jim <at> meyering.net> wrote:
> On Fri, Aug 12, 2016 at 9:35 AM, Jim Meyering <jim <at> meyering.net> wrote:
>> On Fri, Aug 12, 2016 at 7:22 AM, Bastian Beischer
>> <bastian.beischer <at> rwth-aachen.de> wrote:
>>> Hello,
>>>
>>> Please try to run diff3 from diffutils 3.4 as follows:
>>>
>>> echo a > a.txt
>>> echo b > b.txt
>>> echo c > c.txt
>>> diff3 a.txt b.txt c.txt
> ...
>>> There was only one commit in src/diff3.c between 3.3 and 3.4:
>>>
>>> http://git.savannah.gnu.org/cgit/diffutils.git/commit/src?id=3b74a905c5460e7979c53273ac90345860d001a7
>>>
>>> Reverting this commit fixes the issue.
>>
>> Yikes.
>> Thank you for the report.
>> I confirm that that patch is erroneous, and will prepare a complete
>> fix (adding your test and a NEWS entry) shortly.
>> Looks like diffutils-3.5 will have to be released pretty soon.
>
> I've reverted that, added your test case and updated NEWS with a
> commit in your name. Please review that first commit, in the attached.
...
Normally I would be more patient in waiting for your review, but I'm
in a hurry to make diffutils-3.5, so have just pushed those, and am
now preparing a pre-release snapshot.
Information forwarded
to
bug-diffutils <at> gnu.org:
bug#24210; Package
diffutils.
(Mon, 15 Aug 2016 05:55:02 GMT)
Full text and
rfc822 format available.
Message #17 received at 24210 <at> debbugs.gnu.org (full text, mbox):
[Message part 1 (text/plain, inline)]
Hey Jim,
The patches look fine to me, although I don't know the source of diff3 well
enough to be a good reviewer. I've tested the patches a bit and everything
seems to be OK. Thanks for fixing this issue.
Cheers
Bastian
Am 15.08.2016 02:14 schrieb "Jim Meyering" <jim <at> meyering.net>:
> On Sat, Aug 13, 2016 at 10:14 PM, Jim Meyering <jim <at> meyering.net> wrote:
> > On Fri, Aug 12, 2016 at 9:35 AM, Jim Meyering <jim <at> meyering.net> wrote:
> >> On Fri, Aug 12, 2016 at 7:22 AM, Bastian Beischer
> >> <bastian.beischer <at> rwth-aachen.de> wrote:
> >>> Hello,
> >>>
> >>> Please try to run diff3 from diffutils 3.4 as follows:
> >>>
> >>> echo a > a.txt
> >>> echo b > b.txt
> >>> echo c > c.txt
> >>> diff3 a.txt b.txt c.txt
> > ...
> >>> There was only one commit in src/diff3.c between 3.3 and 3.4:
> >>>
> >>> http://git.savannah.gnu.org/cgit/diffutils.git/commit/src?id=
> 3b74a905c5460e7979c53273ac90345860d001a7
> >>>
> >>> Reverting this commit fixes the issue.
> >>
> >> Yikes.
> >> Thank you for the report.
> >> I confirm that that patch is erroneous, and will prepare a complete
> >> fix (adding your test and a NEWS entry) shortly.
> >> Looks like diffutils-3.5 will have to be released pretty soon.
> >
> > I've reverted that, added your test case and updated NEWS with a
> > commit in your name. Please review that first commit, in the attached.
> ...
> Normally I would be more patient in waiting for your review, but I'm
> in a hurry to make diffutils-3.5, so have just pushed those, and am
> now preparing a pre-release snapshot.
>
[Message part 2 (text/html, inline)]
Reply sent
to
Jim Meyering <jim <at> meyering.net>:
You have taken responsibility.
(Mon, 15 Aug 2016 13:57:02 GMT)
Full text and
rfc822 format available.
Notification sent
to
Bastian Beischer <bastian.beischer <at> rwth-aachen.de>:
bug acknowledged by developer.
(Mon, 15 Aug 2016 13:57:02 GMT)
Full text and
rfc822 format available.
Message #22 received at 24210-done <at> debbugs.gnu.org (full text, mbox):
On Sun, Aug 14, 2016 at 10:54 PM, Bastian Beischer
<bastian.beischer <at> rwth-aachen.de> wrote:
> The patches look fine to me, although I don't know the source of diff3 well
> enough to be a good reviewer. I've tested the patches a bit and everything
> seems to be OK. Thanks for fixing this issue.
Thanks for testing.
bug archived.
Request was from
Debbugs Internal Request <help-debbugs <at> gnu.org>
to
internal_control <at> debbugs.gnu.org.
(Tue, 13 Sep 2016 11:24:03 GMT)
Full text and
rfc822 format available.
This bug report was last modified 8 years and 215 days ago.
Previous Next
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson.