linux-kernel - Re: [syzbot] [ocfs2?] KMSAN: uninit-value in from

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Message-ID: <tencent_8006C812E1C657C99D2EF6EECB4C9E67CA06@qq.com>
Date: Sun, 22 Sep 2024 09:52:21 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+6c55f725d1bdc8c52058@...kaller.appspotmail.com
Cc: 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] [ocfs2?] KMSAN: uninit-value in from_kuid (2)

use vfsuid and vfsgid to replace

#syz test

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index ccc57038a977..beb4f241bdeb 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1129,8 +1129,8 @@ int ocfs2_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 			    (unsigned long long)OCFS2_I(inode)->ip_blkno,
 			    dentry->d_name.len, dentry->d_name.name,
 			    attr->ia_valid, attr->ia_mode,
-			    from_kuid(&init_user_ns, attr->ia_uid),
-			    from_kgid(&init_user_ns, attr->ia_gid));
+			    from_kuid(&init_user_ns, attr->ia_vfsuid),
+			    from_kgid(&init_user_ns, attr->ia_vfsgid));
 
 	/* ensuring we don't even attempt to truncate a symlink */
 	if (S_ISLNK(inode->i_mode))