Messages in this thread Patch in this message | | | Date | Mon, 27 Feb 2006 14:32:37 -0800 | From | Chris Wright <> | Subject | [patch 37/39] [PATCH] XFS ftruncate() bug could expose stale data (CVE-2006-0554) |
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-stable review patch. If anyone has any objections, please let us know. ------------------
This is CVE-2006-0554 and SGI bug 942658. With certain types of ftruncate() activity on 2.6 kernels, XFS can end up exposing stale data off disk to a user, putting extents where holes should be.
Signed-off-by: Chris Wright <chrisw@sous-sol.org> ---
fs/xfs/linux-2.6/xfs_aops.c | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.15.4.orig/fs/xfs/linux-2.6/xfs_aops.c +++ linux-2.6.15.4/fs/xfs/linux-2.6/xfs_aops.c @@ -385,7 +385,7 @@ xfs_probe_unmapped_cluster( /* First sum forwards in this page */ do { - if (buffer_mapped(bh)) + if (buffer_mapped(bh) || !buffer_uptodate(bh)) break; total += bh->b_size; } while ((bh = bh->b_this_page) != head); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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