linux-kernel - Re: [syzbot] Re: [syzbot] [f2fs?] WARNING in f2fs_delete

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Message-ID: <67428348.050a0220.1cc393.0027.GAE@google.com>
Date: Sat, 23 Nov 2024 17:37:12 -0800
From: syzbot <syzbot+35a21b6aade7af3c7b3a@...kaller.appspotmail.com>
To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] Re: [syzbot] [f2fs?] WARNING in f2fs_delete_entry

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***

Subject: Re: [syzbot] [f2fs?] WARNING in f2fs_delete_entry
Author: leocstone@...il.com

#syz test

---
 fs/f2fs/inode.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 1ed86df343a5..65f1dc32f173 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -372,6 +372,12 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page)
 		return false;
 	}
 
+	if (inode->i_nlink == 0) {
+		f2fs_warn(sbi, "%s: inode (ino=%lx) has a link count of 0",
+			  __func__, inode->i_ino);
+		return false;
+	}
+
 	return true;
 }
 
-- 
2.43.0