linux-kernel - Re: Today's 'master' leaves .idx/.pack in 0400

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <alpine.LFD.0.98.0704221431430.28339@xanadu.home>
Date:	Sun, 22 Apr 2007 14:34:09 -0400 (EDT)
From:	Nicolas Pitre <nico@....org>
To:	Junio C Hamano <junkio@....net>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	git@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Today's 'master' leaves .idx/.pack in 0400

On Sun, 22 Apr 2007, Junio C Hamano wrote:

> Nicolas Pitre <nico@....org> writes:
> 
> > On Sun, 22 Apr 2007, Junio C Hamano wrote:
> >
> >> With recent glibc, mkstemp() creates 0400 file.  Updated
> >> pack-objects uses it in pack/idx writing without fixing this,
> >> hence this problem.
> >
> > Oops.  I guess I'm guilty for this.  I didn't bother looking at the 
> > permission on the pack for git-pack-objects since git-repack seemed to 
> > take care of that.  But it only _remove_ write permissions.
> 
> Ok, then probably we can change the 0444 in my "quickfix" patch
> to 0644.  That should also let the 5300 test pass.

Well, actually there is no point making pack files writable.  If they're 
modified, they get corrupted.

Here's the fix I wanted to propose:

diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index c72e07a..85c6e6e 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -1786,11 +1786,13 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 		if (rename(pack_tmp_name, tmpname))
 			die("unable to rename temporary pack file: %s",
 			    strerror(errno));
+		chmod(tmpname, 0444);
 		snprintf(tmpname, sizeof(tmpname), "%s-%s.idx",
 			 base_name, sha1_to_hex(object_list_sha1));
 		if (rename(idx_tmp_name, tmpname))
 			die("unable to rename temporary index file: %s",
 			    strerror(errno));
+		chmod(tmpname, 0444);
 		puts(sha1_to_hex(object_list_sha1));
 	}
 	if (progress)


Nicolas

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/