linux-ext4 - Re: Commit c1a1e7fc24d6 causes segfault in ext2fs_new

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Fri, 30 Mar 2012 14:19:36 +0100
From:	"Richard W.M. Jones" <rjones@...hat.com>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	Sami Liedes <sami.liedes@....fi>
Subject: Re: Commit c1a1e7fc24d6 causes segfault in ext2fs_new_inode

On Fri, Mar 30, 2012 at 01:57:26PM +0100, Richard W.M. Jones wrote:
> [I'm tracking this issue here:
> https://bugzilla.redhat.com/show_bug.cgi?id=808421]

A bit of further investigation:

I'm currently not passing EXT2_FLAG_64BITS when opening the
filesystem.  Passing this flag fixes the issue, so I'm going to do
that (are there any downsides?)

It seems like a non-64-bit-compatible bitmap was being created, and
that doesn't have the bitmap->bitmap_ops field initialized because
gen_bitmap.c doesn't use this field.  Somehow, though, we end up
calling a function in gen_bitmap64.c which requires that this field be
defined.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html