From: Erik Faye-Lund <kusmabite@gmail.com>
To: Antoine Pelisse <apelisse@gmail.com>
Cc: "Wataru Noguchi" <wnoguchi.0727@gmail.com>,
"René Scharfe" <l.s.r@web.de>,
"Johannes Schindelin" <Johannes.Schindelin@gmx.de>,
git <git@vger.kernel.org>, msysGit <msysgit@googlegroups.com>
Subject: Re: [PATCH] mingw-multibyte: fix memory acces violation and path length limits.
Date: Thu, 3 Oct 2013 19:36:48 +0200 [thread overview]
Message-ID: <CABPQNSaqjKPGAQ4EKBSk+bQP2WMksc6M0YQxSkB91UrnFF28xQ@mail.gmail.com> (raw)
In-Reply-To: <CALWbr2zDi6XjMCRimUHu2=1qrA_=3ATq+50KBa1aNoBf4X_L9g@mail.gmail.com>
On Thu, Oct 3, 2013 at 7:25 PM, Antoine Pelisse <apelisse@gmail.com> wrote:
> I've not followed the thread so much but, in that
> entry.c::checkout_entry,() we do:
>
> memcpy(path, state->base_dir, len);
> strcpy(path + len, ce->name);
>
> which can of course result in memory violation if PATH is not long enough.
>
...aaand you're spot on. The following patch illustrates it:
$ /git/git-clone.exe mingw-checkout-crash.git
Cloning into 'mingw-checkout-crash'...
done.
fatal: argh, this won't work!
warning: Clone succeeded, but checkout failed.
You can inspect what was checked out with 'git status'
and retry the checkout with 'git checkout -f HEAD'
---
diff --git a/entry.c b/entry.c
index acc892f..505638e 100644
--- a/entry.c
+++ b/entry.c
@@ -244,6 +244,9 @@ int checkout_entry(struct cache_entry *ce,
if (topath)
return write_entry(ce, topath, state, 1);
+ if (len > PATH_MAX || len + strlen(ce->name) > PATH_MAX)
+ die("argh, this won't work!");
+
memcpy(path, state->base_dir, len);
strcpy(path + len, ce->name);
len += ce_namelen(ce);
> On Thu, Oct 3, 2013 at 12:26 AM, Wataru Noguchi <wnoguchi.0727@gmail.com> wrote:
>> Hi,
>>
>> At last, I foundfollowing Makefile optimization suppression works fine in my
>> case.
>>
>> CFLAGS = -g -O2 -fno-inline-small-functions -Wall
>>
>> Following optimization option cause crash,
>>
>> -finline-small-functions
> --
> To unsubscribe from this list: send the line "unsubscribe git" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
--
*** Please reply-to-all at all times ***
*** (do not pretend to know who is subscribed and who is not) ***
*** Please avoid top-posting. ***
The msysGit Wiki is here: https://github.com/msysgit/msysgit/wiki - Github accounts are free.
You received this message because you are subscribed to the Google
Groups "msysGit" group.
To post to this group, send email to msysgit@googlegroups.com
To unsubscribe from this group, send email to
msysgit+unsubscribe@googlegroups.com
For more options, and view previous threads, visit this group at
http://groups.google.com/group/msysgit?hl=en_US?hl=en
---
You received this message because you are subscribed to the Google Groups "msysGit" group.
To unsubscribe from this group and stop receiving emails from it, send an email to msysgit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
next prev parent reply other threads:[~2013-10-03 17:37 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-28 21:17 [PATCH] mingw-multibyte: fix memory acces violation and path length limits Wataru Noguchi
2013-09-28 23:18 ` Johannes Schindelin
2013-09-29 2:56 ` Wataru Noguchi
2013-09-29 11:01 ` [msysGit] " Stefan Beller
2013-10-01 13:37 ` Wataru Noguchi
2013-09-30 17:00 ` René Scharfe
2013-09-30 21:02 ` Erik Faye-Lund
2013-10-01 13:35 ` Wataru Noguchi
2013-10-02 22:26 ` Wataru Noguchi
2013-10-03 17:25 ` Antoine Pelisse
2013-10-03 17:36 ` Erik Faye-Lund [this message]
2013-10-05 11:39 ` Wataru Noguchi
2013-10-19 10:52 ` [PATCH] Prevent buffer overflows when path is too big Antoine Pelisse
2013-10-20 5:47 ` Torsten Bögershausen
2013-10-20 6:05 ` [msysGit] " Ondřej Bílka
2013-10-20 6:27 ` Torsten Bögershausen
2013-10-20 7:39 ` [msysGit] " Ondřej Bílka
2013-10-20 10:33 ` Duy Nguyen
2013-10-20 17:57 ` Antoine Pelisse
2013-10-21 1:31 ` Duy Nguyen
2013-10-21 19:02 ` Johannes Sixt
2013-10-21 19:07 ` Erik Faye-Lund
2013-10-21 19:14 ` Jeff King
2013-10-21 19:32 ` Jeff King
2013-10-23 12:55 ` [PATCH 1/2] entry.c: convert checkout_entry to use strbuf Nguyễn Thái Ngọc Duy
2013-10-23 12:55 ` [PATCH 2/2] entry.c: convert write_entry " Nguyễn Thái Ngọc Duy
2013-10-23 17:52 ` Junio C Hamano
2013-10-24 1:23 ` Duy Nguyen
2013-10-24 19:49 ` Junio C Hamano
2013-10-24 23:47 ` Duy Nguyen
2013-10-23 12:58 ` [PATCH 1/2] entry.c: convert checkout_entry " Antoine Pelisse
2013-10-23 13:04 ` Duy Nguyen
2013-10-23 13:06 ` Antoine Pelisse
2013-10-23 17:29 ` Jeff King
2013-10-23 17:34 ` Erik Faye-Lund
2013-10-23 17:52 ` Jeff King
2013-10-23 18:09 ` Junio C Hamano
2013-10-23 18:10 ` Jeff King
2013-10-24 1:55 ` [PATCH v2] " Nguyễn Thái Ngọc Duy
2013-10-23 12:55 ` [PATCH] Prevent buffer overflows when path is too big Duy Nguyen
2013-11-26 18:39 ` [PATCH] Prevent buffer overflows when path is too long Antoine Pelisse
2013-11-26 19:50 ` Junio C Hamano
2013-11-29 12:12 ` Antoine Pelisse
2013-12-14 11:31 ` Antoine Pelisse
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=CABPQNSaqjKPGAQ4EKBSk+bQP2WMksc6M0YQxSkB91UrnFF28xQ@mail.gmail.com \
--to=kusmabite@gmail.com \
--cc=Johannes.Schindelin@gmx.de \
--cc=apelisse@gmail.com \
--cc=git@vger.kernel.org \
--cc=l.s.r@web.de \
--cc=msysgit@googlegroups.com \
--cc=wnoguchi.0727@gmail.com \
/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).