linux-kernel - Re: Syzbot test for fs: ocfs2: fix kernel BUG in ocfs2_find_victim

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Message-ID: <692b4403.a70a0220.2ea503.009f.GAE@google.com>
Date: Sat, 29 Nov 2025 11:05:39 -0800
From: syzbot <syzbot@...kaller.appspotmail.com>
To: activprithvi@...il.com
Cc: activprithvi@...il.com, jlbec@...lplan.org, joseph.qi@...ux.alibaba.com, 
	linux-kernel@...r.kernel.org, mark@...heh.com, ocfs2-devel@...ts.linux.dev, 
	syzkaller-bugs@...glegroups.com
Subject: Re: Syzbot test for fs: ocfs2: fix kernel BUG in ocfs2_find_victim_chain

> #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 939f15e640f193616691d3bcde0089760e75b0d3

I see the command but can't find the corresponding bug.
Please resend the email to syzbot+HASH@...kaller.appspotmail.com address
that is the sender of the bug report (also present in the Reported-by tag).

>
> Signed-off-by: Prithvi Tambewagh <activprithvi@...il.com>
> ---
>  fs/ocfs2/suballoc.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
> index 6ac4dcd54588..c7eb6efc00b4 100644
> --- a/fs/ocfs2/suballoc.c
> +++ b/fs/ocfs2/suballoc.c
> @@ -1993,6 +1993,13 @@ static int ocfs2_claim_suballoc_bits(struct ocfs2_alloc_context *ac,
>  
>  	cl = (struct ocfs2_chain_list *) &fe->id2.i_chain;
>  
> +	if( le16_to_cpu(cl->cl_next_free_rec) == 0) {
> +		status = ocfs2_error(ac->ac_inode->i_sb,
> +				     "Chain allocator dinode %llu has 0 chains\n",
> +				     (unsigned long long)le64_to_cpu(fe->i_blkno));
> +		goto bail;
> +	}
> +
>  	victim = ocfs2_find_victim_chain(cl);
>  	ac->ac_chain = victim;
>  
>
> base-commit: 939f15e640f193616691d3bcde0089760e75b0d3
> -- 
> 2.34.1
>
> -- 
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