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-rw-r--r--fs/jfs/jfs_imap.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 6ed2e1d4c..ac42f8ee5 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -2179,6 +2179,9 @@ static int diNewExt(struct inomap * imap, struct iag * iagp, int extno)
/* get the ag and iag numbers for this iag.
*/
agno = BLKTOAG(le64_to_cpu(iagp->agstart), sbi);
+ if (agno >= MAXAG || agno < 0)
+ return -EIO;
+
iagno = le32_to_cpu(iagp->iagnum);
/* check if this is the last free extent within the