From: Dave Kleikamp <dave.kleikamp@oracle.com>
Date: Fri, 13 Nov 2020 20:58:46 +0000 (-0600)
Subject: jfs: Fix array index bounds check in dbAdjTree
X-Git-Tag: v4.14.213~25
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=4a0809752ef23cd4be99b0cd8f7586c8ed7bd433;p=users%2Fdwmw2%2Flinux.git

jfs: Fix array index bounds check in dbAdjTree

commit c61b3e4839007668360ed8b87d7da96d2e59fc6c upstream.

Bounds checking tools can flag a bug in dbAdjTree() for an array index
out of bounds in dmt_stree. Since dmt_stree can refer to the stree in
both structures dmaptree and dmapctl, use the larger array to eliminate
the false positive.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Reported-by: butt3rflyh4ck <butterflyhuangxx@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/jfs/jfs_dmap.h b/fs/jfs/jfs_dmap.h
index 562b9a7e4311f..f502a15c6c987 100644
--- a/fs/jfs/jfs_dmap.h
+++ b/fs/jfs/jfs_dmap.h
@@ -196,7 +196,7 @@ typedef union dmtree {
 #define	dmt_leafidx	t1.leafidx
 #define	dmt_height	t1.height
 #define	dmt_budmin	t1.budmin
-#define	dmt_stree	t1.stree
+#define	dmt_stree	t2.stree
 
 /*
  *	on-disk aggregate disk allocation map descriptor.