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[PATCH] xfs_repair: fix process_bmbt_reclist_int

To: xfs@xxxxxxxxxxx
Subject: [PATCH] xfs_repair: fix process_bmbt_reclist_int
From: Ben Myers <bpm@xxxxxxx>
Date: Tue, 3 Dec 2013 15:57:35 -0600
Delivered-to: xfs@xxxxxxxxxxx
User-agent: Mutt/1.5.20 (2009-06-14)
There is a set checks for corruption in block map btrees in
process_bmbt_reclist_int that we identify but currently do not fix.  It
appears that the author's intent in this function was to set error = 1,
and then only clear it when all of the checks were completed
successfully.  Unfortunately error can be cleared when it is used for
the return value of blkmap_set_ext.  Some kinds of corruption are not
being fixed, including duplicate extents, claiming free blocks, claiming
metadata blocks, and multiply used blocks.

Fix this by shadowing error for blkmap_set_ext.

Signed-off-by: Ben Myers <bpm@xxxxxxx>

---
 repair/dinode.c |    1 +
 1 file changed, 1 insertion(+)

Index: b/repair/dinode.c
===================================================================
--- a/repair/dinode.c   2013-12-03 15:43:59.895287548 -0600
+++ b/repair/dinode.c   2013-12-03 15:44:09.315225645 -0600
@@ -663,6 +663,7 @@ _("inode %" PRIu64 " - extent offset too
                }
 
                if (blkmapp && *blkmapp) {
+                       int error;
                        error = blkmap_set_ext(blkmapp, irec.br_startoff,
                                        irec.br_startblock, irec.br_blockcount);
                        if (error) {

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