linux-kernel - [PATCH] reiserfs: fix uninit-value in reiserfs_new

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Message-ID: <tencent_897491761D662E3D7336B297BA37064A7C09@qq.com>
Date: Sun, 31 Dec 2023 09:04:04 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+6450929faa7a97cd42d1@...kaller.appspotmail.com
Cc: brauner@...nel.org,
	damien.lemoal@...nsource.wdc.com,
	edward.shishkin@...il.com,
	glider@...gle.com,
	jack@...e.cz,
	jlayton@...nel.org,
	linuszeng@...cent.com,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	reiserfs-devel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com,
	willy@...radead.org
Subject: [PATCH] reiserfs: fix uninit-value in reiserfs_new_inode

Before creating a new inode, it is necessary to initialize the "new packing
locality" tag of the dir.

Signed-off-by: Edward Adam Davis <eadavis@...com>
---
 fs/reiserfs/namei.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 994d6e6995ab..3a824fb170d5 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -638,6 +638,10 @@ static int reiserfs_create(struct mnt_idmap *idmap, struct inode *dir,
 	if (retval)
 		return retval;
 
+#ifdef DISPLACE_NEW_PACKING_LOCALITIES
+	REISERFS_I(dir)->new_packing_locality = 0;
+#endif
+
 	if (!(inode = new_inode(dir->i_sb))) {
 		return -ENOMEM;
 	}
-- 
2.43.0