linux-kernel - Re: [syzbot] [reiserfs?] KMSAN: uninit-value in reiserfs_new

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Message-ID: <tencent_A1836F2960A3B98451B765576926CA937305@qq.com>
Date: Sun, 31 Dec 2023 08:24:36 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+6450929faa7a97cd42d1@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [reiserfs?] KMSAN: uninit-value in reiserfs_new_inode (2)

please test uninit-value in reiserfs_new_inode

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 861deac3b092

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;
 	}