[PATCH] xfs_repair: set args.geo in dir2_kill_block

Eric Sandeen
2015-07-23T20:15:00Z

This path in xfs_repair:

dir2_kill_block
libxfs_da_shrink_inode
xfs_dir2_shrink_inode
xfs_dir2_db_to_da

segfaults, because dir2_kill_block() does not initialize
args.geo, and a null geometry winds up in xfs_dir2_db_to_da(),
which dereferences it.

Fix that.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
---

diff --git a/repair/phase6.c b/repair/phase6.c
index de445c6..0c952ed 100644
--- a/repair/phase6.c
+++ b/repair/phase6.c
@@ -1438,6 +1438,7 @@ dir2_kill_block(
args.firstblock = &firstblock;
args.flist = &flist;
args.whichfork = XFS_DATA_FORK;
+ args.geo = mp->m_dir_geo;
if (da_bno >= mp->m_dir_geo->leafblk && da_bno < mp->m_dir_geo->freeblk)
error = -libxfs_da_shrink_inode(&args, da_bno, bp);
else