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

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Date: Tue, 23 Jan 2024 17:43:25 -0800
From: syzbot <syzbot+ab18fa9c959320611727@...kaller.appspotmail.com>
To: eadavis@...com
Cc: eadavis@...com, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [jfs?] WARNING in dbAdjTree

> please test WARNING in dbAdjTree
>
> #syz test upstream master

"upstream" does not look like a valid git repo address.

>
> 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,
>