From: Jeff King <peff@peff.net>
To: demerphq <demerphq@gmail.com>
Cc: Git <git@vger.kernel.org>, "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: Re: Bug: git branch --unset-upstream command can nuke config when disk is full.
Date: Wed, 13 Sep 2017 10:51:54 -0400 [thread overview]
Message-ID: <20170913145154.423zqe6antzccclk@sigill.intra.peff.net> (raw)
In-Reply-To: <CANgJU+WHr2-FjAUUKQ8pUkniczcxrr11dTo_zBeXdTi_su2oUA@mail.gmail.com>
On Wed, Sep 13, 2017 at 04:49:45PM +0200, demerphq wrote:
> On 13 September 2017 at 16:17, Jeff King <peff@peff.net> wrote:
> > You're welcome to read over the function to double-check, but I just
> > looked it over and couldn't find any unchecked writes.
>
> I can look, but I doubt I would notice something you did not.
>
> On the other hand the strace output does show that this is a case
> where the writes failed, but we still renamed the empty config.lock
> file into place:
>
>
> write(3, "[core]\n\tsharedRepository = true\n"..., 288) = -1 ENOSPC
> (No space left on device)
> write(3, " merge = refs/heads/yves/"..., 51) = -1 ENOSPC (No
> space left on device)
> munmap(0x7f48d9b8c000, 363) = 0
> close(3) = 0
> rename("/usr/local/git_tree/main/.git/config.lock",
> "/usr/local/git_tree/main/.git/config") = 0
Hmph. That is very disturbing. But with that information I should be
able to track down the culprit. Thanks for digging.
> I freed up space and things worked, so I somehow doubt the filesystem
> is at fault. When I then filled up the disk and retried the error was
> repeatable.
Yeah, agreed. This really does look like a bug.
-Peff
next prev parent reply other threads:[~2017-09-13 14:51 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-13 11:59 Bug: git branch --unset-upstream command can nuke config when disk is full demerphq
2017-09-13 12:34 ` Jeff King
2017-09-13 13:38 ` demerphq
2017-09-13 14:17 ` Jeff King
2017-09-13 14:49 ` demerphq
2017-09-13 14:51 ` Jeff King [this message]
2017-09-13 15:18 ` demerphq
2017-09-13 15:22 ` Jeff King
2017-09-13 15:49 ` demerphq
2017-09-13 17:08 ` [PATCH 0/7] config.c may fail to notice some write() failures Jeff King
2017-09-13 17:11 ` [PATCH 1/7] config: avoid "write_in_full(fd, buf, len) < len" pattern Jeff King
2017-09-13 17:47 ` Jonathan Nieder
2017-09-13 17:53 ` Jeff King
2017-09-13 17:59 ` Jonathan Nieder
2017-09-13 18:11 ` Jeff King
2017-09-13 18:15 ` [PATCH v2] " Jeff King
2017-09-13 18:24 ` Jonathan Nieder
2017-09-13 18:58 ` Jeff King
2017-09-13 19:18 ` Jonathan Nieder
2017-09-13 19:49 ` Jonathan Nieder
2017-09-13 22:43 ` Ramsay Jones
2017-09-13 23:31 ` Ramsay Jones
2017-09-15 0:37 ` Jeff King
2017-09-15 15:15 ` Ramsay Jones
2017-09-13 21:33 ` Junio C Hamano
2017-09-13 17:11 ` [PATCH 2/7] get-tar-commit-id: check write_in_full() return against 0 Jeff King
2017-09-13 17:53 ` Jonathan Nieder
2017-09-13 18:02 ` Jeff King
2017-09-13 18:37 ` Jeff King
2017-09-13 21:09 ` Jonathan Nieder
2017-09-15 0:40 ` Jeff King
2017-09-13 17:16 ` [PATCH 3/7] avoid "write_in_full(fd, buf, len) != len" pattern Jeff King
2017-09-13 21:14 ` Jonathan Nieder
2017-09-15 0:42 ` Jeff King
2017-09-13 17:16 ` [PATCH 4/7] convert less-trivial versions of "write_in_full() != len" Jeff King
2017-09-13 21:16 ` Jonathan Nieder
2017-09-13 17:17 ` [PATCH 5/7] pkt-line: check write_in_full() errors against "< 0" Jeff King
2017-09-13 21:17 ` Jonathan Nieder
2017-09-13 17:17 ` [PATCH 6/7] notes-merge: use ssize_t for write_in_full() return value Jeff King
2017-09-13 21:20 ` Jonathan Nieder
2017-09-15 0:43 ` Jeff King
2017-09-13 17:17 ` [PATCH 7/7] config: flip return value of store_write_*() Jeff King
2017-09-13 21:25 ` Jonathan Nieder
2017-09-15 0:46 ` Jeff King
2017-09-13 18:47 ` [PATCH 8/7] read_pack_header: handle signed/unsigned comparison in read result Jeff King
2017-09-13 19:11 ` Jonathan Nieder
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: http://vger.kernel.org/majordomo-info.html
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170913145154.423zqe6antzccclk@sigill.intra.peff.net \
--to=peff@peff.net \
--cc=avarab@gmail.com \
--cc=demerphq@gmail.com \
--cc=git@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://80x24.org/mirrors/git.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).