From: Christoph Mallon <mallon@cs.uni-saarland.de>
To: git@vger.kernel.org
Subject: Bug in reflog of length 0x2BFF
Date: Mon, 01 Dec 2014 16:15:28 +0100 [thread overview]
Message-ID: <547C8610.8080301@cs.uni-saarland.de> (raw)
[-- Attachment #1: Type: text/plain, Size: 1156 bytes --]
Hi,
I encountered a strange bug concerning the reflog.
I suspect some kind of out-of-bounds access.
The symptom is:
%git rev-parse 'master@{52}'
warning: Log for ref refs/heads/master has gap after Thu, 1 Jan 1970
00:00:01 +0000.
0000000000000000000000000000000000000036
Try the following:
git init gitbug
cd gitbug
git commit --allow-empty -m a
cp ../reflog.bad .git/logs/refs/heads/master
git rev-parse 'master@{52}'
The source of cp is the attached file.
This is from a reflog of stash.
I just replaced all stuff by dummy values.
This does not seem to affect the bug.
Sorry, it must be this long.
Some observations:
* If you change the length of any line starting at line 3, the symptom
vanishes.
(The XXXXX at the line ends are free-form text.)
* Starting at line three, there are 0x2BFF bytes till the end of file.
Is there some dynamically growing buffer, which at some point reaches
the size 0x2C00?
* Changing the length of the first two lines has no effect.
Is the file read backwards?
* It happens at least with git 2.1.2 (amd64) and 2.2.0 (ia32).
* 2.0.2 (amd64) and 2.1.0 (amd64) seem not to have this bug.
Any ideas?
Christoph
[-- Attachment #2: reflog.bad --]
[-- Type: text/plain, Size: 11551 bytes --]
0000000000000000000000000000000000000037 0000000000000000000000000000000000000036 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxx> 0000000001 +0000 X
0000000000000000000000000000000000000036 0000000000000000000000000000000000000035 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxx> 0000000001 +0000 X
0000000000000000000000000000000000000035 0000000000000000000000000000000000000034 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000034 0000000000000000000000000000000000000033 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXX
0000000000000000000000000000000000000033 0000000000000000000000000000000000000032 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000032 0000000000000000000000000000000000000031 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000031 0000000000000000000000000000000000000030 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000030 000000000000000000000000000000000000002f xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000002f 000000000000000000000000000000000000002e xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000002e 000000000000000000000000000000000000002d xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000002d 000000000000000000000000000000000000002c xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000002c 000000000000000000000000000000000000002b xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000002b 000000000000000000000000000000000000002a xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000002a 0000000000000000000000000000000000000029 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000029 0000000000000000000000000000000000000028 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000028 0000000000000000000000000000000000000027 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000027 0000000000000000000000000000000000000026 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000026 0000000000000000000000000000000000000025 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000025 0000000000000000000000000000000000000024 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000024 0000000000000000000000000000000000000023 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000023 0000000000000000000000000000000000000022 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000022 0000000000000000000000000000000000000021 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000021 0000000000000000000000000000000000000020 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000020 000000000000000000000000000000000000001f xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000001f 000000000000000000000000000000000000001e xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000001e 000000000000000000000000000000000000001d xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000001d 000000000000000000000000000000000000001c xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000001c 000000000000000000000000000000000000001b xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000001b 000000000000000000000000000000000000001a xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000001a 0000000000000000000000000000000000000019 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000019 0000000000000000000000000000000000000018 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000018 0000000000000000000000000000000000000017 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000017 0000000000000000000000000000000000000016 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000016 0000000000000000000000000000000000000015 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000015 0000000000000000000000000000000000000014 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000014 0000000000000000000000000000000000000013 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000013 0000000000000000000000000000000000000012 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000012 0000000000000000000000000000000000000011 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000011 0000000000000000000000000000000000000010 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000010 000000000000000000000000000000000000000f xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000000f 000000000000000000000000000000000000000e xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000000e 000000000000000000000000000000000000000d xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000000d 000000000000000000000000000000000000000c xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000000c 000000000000000000000000000000000000000b xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000000b 000000000000000000000000000000000000000a xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
000000000000000000000000000000000000000a 0000000000000000000000000000000000000009 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000009 0000000000000000000000000000000000000008 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000008 0000000000000000000000000000000000000007 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000007 0000000000000000000000000000000000000006 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000006 0000000000000000000000000000000000000005 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000005 0000000000000000000000000000000000000004 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000004 0000000000000000000000000000000000000003 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000003 0000000000000000000000000000000000000002 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
0000000000000000000000000000000000000002 0000000000000000000000000000000000000001 xxxxxxxxxxxxxxxx <xxx@xxxxxxxxxxxxxxxxxxxxx> 0000000001 +0000 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
next reply other threads:[~2014-12-01 15:54 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-01 15:15 Christoph Mallon [this message]
2014-12-01 16:00 ` Bug in reflog of length 0x2BFF Christoph Mallon
2014-12-01 18:53 ` Stefan Beller
2014-12-01 22:30 ` Christoph Mallon
2014-12-01 23:35 ` Jonathan Nieder
2014-12-02 1:39 ` Stefan Beller
2014-12-02 6:13 ` Christoph Mallon
2014-12-04 20:18 ` Junio C Hamano
2014-12-04 20:37 ` Christoph Mallon
2014-12-04 21:58 ` Jeff King
2014-12-04 22:14 ` Junio C Hamano
2014-12-05 1:28 ` [PATCH] for_each_reflog_ent_reverse: fix newlines on block boundaries Jeff King
2014-12-05 1:32 ` [PATCH] for_each_reflog_ent_reverse: turn leftover check into assertion Jeff King
2014-12-05 19:15 ` Junio C Hamano
2014-12-04 22:10 ` Bug in reflog of length 0x2BFF Junio C Hamano
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