Commit a37f7b12 authored Jun 03, 2018 by Darrick J. Wong

xfs: xfs_alloc_get_rec should return EFSCORRUPTED for obvious bnobt corruption



Return -EFSCORRUPTED when the bnobt/cntbt return obviously corrupt
values, rather than letting them bounce around in the internal code.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

parent b3986010

fs/xfs/libxfs/xfs_alloc.c

+8 −4

Original line number	Diff line number	Diff line
		@@ -231,10 +231,14 @@ xfs_alloc_get_rec(
		int error;

		error = xfs_btree_get_rec(cur, &rec, stat);
		if (!error && *stat == 1) {
		if (error \|\| !(*stat))
		return error;
		if (rec->alloc.ar_blockcount == 0)
		return -EFSCORRUPTED;

		*bno = be32_to_cpu(rec->alloc.ar_startblock);
		*len = be32_to_cpu(rec->alloc.ar_blockcount);
		}

		return error;
		}