[PATCH] xfs: fix integer overflow in xrep_bmap

["Darrick J. Wong" <djwong@kernel.org>]

From: Darrick J. Wong <djwong@kernel.org>

The variable declaration in this function predates the merge of the
nrext64 (aka 64-bit extent counters) feature, which means that the
variable declaration type is insufficient to avoid an integer overflow.
Fix that by redeclaring the variable to be xfs_extnum_t.

Coverity-id: 1630958
Fixes: 8f71bede8efd ("xfs: repair inode fork block mapping data structures")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
 fs/xfs/scrub/bmap_repair.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/scrub/bmap_repair.c b/fs/xfs/scrub/bmap_repair.c
index 49dc38acc66bf..4505f4829d53f 100644
--- a/fs/xfs/scrub/bmap_repair.c
+++ b/fs/xfs/scrub/bmap_repair.c
@@ -801,7 +801,7 @@ xrep_bmap(
 {
 	struct xrep_bmap	*rb;
 	char			*descr;
-	unsigned int		max_bmbt_recs;
+	xfs_extnum_t		max_bmbt_recs;
 	bool			large_extcount;
 	int			error = 0;