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Date: Wed, 16 Feb 2011 08:46:22 -0500 (EST)
From: Josh Bressers <>
Cc: "Steven M. Christey" <>
Subject: Re: CVE request - kernel: xfs infoleak

----- Original Message -----
> 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."

Please use CVE-2011-0711.



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