[PATCH 6.1 084/137] jfs: Fix sanity check in dbMount

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6.1-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dave Kleikamp <dave.kleikamp@xxxxxxxxxx>

[ Upstream commit 67373ca8404fe57eb1bb4b57f314cff77ce54932 ]

MAXAG is a legitimate value for bmp->db_numag

Fixes: e63866a47556 ("jfs: fix out-of-bounds in dbNextAG() and diAlloc()")

Signed-off-by: Dave Kleikamp <dave.kleikamp@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 fs/jfs/jfs_dmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index 384aa6dfdb95e..a6b1d748df16b 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -187,7 +187,7 @@ int dbMount(struct inode *ipbmap)
 	}
 
 	bmp->db_numag = le32_to_cpu(dbmp_le->dn_numag);
-	if (!bmp->db_numag || bmp->db_numag >= MAXAG) {
+	if (!bmp->db_numag || bmp->db_numag > MAXAG) {
 		err = -EINVAL;
 		goto err_release_metapage;
 	}
-- 
2.43.0







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