From: John Szakmeister <john@szakmeister.net>
To: Dennis Kaarsemaker <dennis@kaarsemaker.net>
Cc: git@vger.kernel.org
Subject: Re: "git fsck" not detecting garbage at the end of blob object files...
Date: Fri, 13 Jan 2017 04:16:29 -0500 [thread overview]
Message-ID: <CAEBDL5WKsMT7XHdX1gAWW3-WaJo7p7R60uogWZEuBCYGsu+s5Q@mail.gmail.com> (raw)
In-Reply-To: <1483825623.31837.9.camel@kaarsemaker.net>
On Sat, Jan 7, 2017 at 4:47 PM, Dennis Kaarsemaker
<dennis@kaarsemaker.net> wrote:
> On Sat, 2017-01-07 at 07:50 -0500, John Szakmeister wrote:
>> I was perusing StackOverflow this morning and ran across this
>> question: http://stackoverflow.com/questions/41521143/git-fsck-full-only-checking-directories/
>>
>> It was a simple question about why "checking objects" was not
>> appearing, but in it was another issue. The user purposefully
>> corrupted a blob object file to see if `git fsck` would catch it by
>> tacking extra data on at the end. `git fsck` happily said everything
>> was okay, but when I played with things locally I found out that `git
>> gc` does not like that extra garbage. I'm not sure what the trade-off
>> needs to be here, but my expectation is that if `git fsck` says
>> everything is okay, then all operations using that object (file)
>> should work too.
>>
>> Is that unreasonable? What would be the impact of fixing this issue?
>
> If you do this with a commit object or tree object, fsck does complain.
> I think it's sensible to do so for blob objects as well.
Also very good information. Thanks Dennis!
-John
prev parent reply other threads:[~2017-01-13 9:16 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-07 12:50 "git fsck" not detecting garbage at the end of blob object files John Szakmeister
2017-01-07 21:47 ` Dennis Kaarsemaker
2017-01-08 5:26 ` Jeff King
2017-01-13 9:15 ` John Szakmeister
2017-01-13 17:52 ` [PATCH 0/6] loose-object fsck fixes/tightening Jeff King
2017-01-13 17:54 ` [PATCH 1/6] t1450: refactor loose-object removal Jeff King
2017-01-13 17:54 ` [PATCH 2/6] sha1_file: fix error message for alternate objects Jeff King
2017-01-13 17:55 ` [PATCH 3/6] t1450: test fsck of packed objects Jeff King
2017-01-13 17:58 ` [PATCH 4/6] sha1_file: add read_loose_object() function Jeff King
2017-01-13 17:59 ` [PATCH 5/6] fsck: parse loose object paths directly Jeff King
2018-10-30 20:03 ` Infinite loop regression in git-fsck in v2.12.0 Ævar Arnfjörð Bjarmason
2018-10-30 21:35 ` Jeff King
2018-10-30 22:28 ` Junio C Hamano
2018-10-30 22:56 ` Jeff King
2018-10-30 23:12 ` Jeff King
2018-10-30 23:18 ` [PATCH 1/3] t1450: check large blob in trailing-garbage test Jeff King
2018-10-30 23:23 ` [PATCH 2/3] check_stream_sha1(): handle input underflow Jeff King
2018-10-31 4:23 ` Junio C Hamano
2018-10-31 4:30 ` Jeff King
2018-10-31 4:44 ` Junio C Hamano
2018-10-31 5:03 ` Jeff King
2018-10-31 5:13 ` Jeff King
2018-10-31 5:31 ` Junio C Hamano
2018-10-30 23:23 ` [PATCH 3/3] cat-file: handle streaming failures consistently Jeff King
2018-10-31 12:42 ` [PATCH 0/3] Add a GIT_TEST_FSCK test mode Ævar Arnfjörð Bjarmason
2018-10-31 12:42 ` [PATCH 1/3] tests: add a "env-bool" helper to test-tool Ævar Arnfjörð Bjarmason
2018-10-31 12:42 ` [PATCH 2/3] tests: mark those tests where "git fsck" fails at the end Ævar Arnfjörð Bjarmason
2018-11-01 3:37 ` Junio C Hamano
2018-10-31 12:42 ` [PATCH 3/3] tests: add a special test setup that runs "git fsck" before exiting Ævar Arnfjörð Bjarmason
2018-10-31 13:33 ` [PATCH 3/3] cat-file: handle streaming failures consistently Torsten Bögershausen
2018-10-31 14:23 ` Junio C Hamano
2018-10-31 14:37 ` Jeff King
2018-10-31 17:38 ` Eric Sunshine
2018-10-31 20:29 ` Jeff King
2018-10-30 21:56 ` Infinite loop regression in git-fsck in v2.12.0 Ævar Arnfjörð Bjarmason
2018-10-30 23:08 ` Jeff King
2017-01-13 18:00 ` [PATCH 6/6] fsck: detect trailing garbage in all object types Jeff King
2017-01-19 11:18 ` [PATCH 0/6] loose-object fsck fixes/tightening John Szakmeister
2017-01-13 9:16 ` John Szakmeister [this message]
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