linux-kernel - Re: [syzbot] [jfs?] WARNING in dbAdjTree

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Date: Wed, 24 Jan 2024 09:45:04 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+ab18fa9c959320611727@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [jfs?] WARNING in dbAdjTree

please test WARNING in dbAdjTree

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index 8eec84c651bf..bed14d5169f8 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -2294,6 +2294,7 @@ static int dbFreeBits(struct bmap * bmp, struct dmap * dp, s64 blkno,
 	 */
 	dbitno = blkno & (BPERDMAP - 1);
 	word = dbitno >> L2DBWORD;
+	printk("dbitno: %d, blkno: %ld, word: %d, %s\n", dbitno, blkno, word, __func__);
 
 	/* block range better be within the dmap.
 	 */
@@ -2875,8 +2876,9 @@ static void dbAdjTree(dmtree_t *tp, int leafno, int newval, bool is_ctl)
 	/* pick up the index of the leaf for this leafno.
 	 */
 	lp = leafno + le32_to_cpu(tp->dmt_leafidx);
+	printk("lp: %d, leafno: %d, tp: %p, %s\n", lp, leafno, tp,  __func__);
 
-	if (WARN_ON_ONCE(lp >= size || lp < 0))
+	if (lp >= size || lp < 0)
 		return;
 
 	/* is the current value the same as the old value ?  if so,