Date: Tue, 01 Mar 2011 17:07:43 +0800 From: Eugene Teo <eugene@...hat.com> To: oss-security@...ts.openwall.com CC: "Steven M. Christey" <coley@...us.mitre.org> Subject: Re: CVE request - kernel: xfs infoleak On 02/16/2011 04:41 PM, Eugene Teo wrote: > From Dan R0s3nbug5, "The FSGEOMETRY_V1 ioctl (and its compat > equivalent) calls out to xfs_fs_geometry() with a version number of 3. > This code path does not fill in the logsunit member of the passed > xfs_fsop_geom_t, leading to the leaking of four bytes of uninitialized > stack data to potentially unprivileged callers. Since all other members > are filled in all code paths and there are no padding bytes in this > structure, it's safe to avoid an expensive memset() in favor of just > clearing this one field." > > https://patchwork.kernel.org/patch/555461/ > https://bugzilla.redhat.com/show_bug.cgi?id=677260 There's an issue with the patch, here's the fix to the fix: http://www.spinics.net/lists/xfs/msg03801.html Eugene -- Eugene Teo / Red Hat Security Response Team
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