Commit 56830d6c authored Aug 01, 2018 by Darrick J. Wong

xfs: check da node magic in _node_lookup_int



Before we start processing what we /think/ is a da3 node block, actually
check the magic to make sure that we're looking at a node block.  This
way we won't blow the asserts in _node_hdr_from_disk on corrupted
metadata.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>

parent 611995db

fs/xfs/libxfs/xfs_da_btree.c

+3 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1523,8 +1523,10 @@ xfs_da3_node_lookup_int(
	break;		break;
	}		}

	blk->magic = XFS_DA_NODE_MAGIC;		if (magic != XFS_DA_NODE_MAGIC && magic != XFS_DA3_NODE_MAGIC)
			return -EFSCORRUPTED;

			blk->magic = XFS_DA_NODE_MAGIC;

	/*		/*
	* Search an intermediate node for a match.		* Search an intermediate node for a match.