From: Qianqiang Liu <qianqiang.liu@163.com>
Date: Mon, 21 Oct 2024 20:58:01 +0000 (+0200)
Subject: KMSAN: uninit-value in inode_go_dump (5)
X-Git-Tag: v6.13-rc1~79^2~16
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9417fcfca3c5e30a0b961e7250fab92cfa5d123;p=thirdparty%2Fkernel%2Fstable.git

KMSAN: uninit-value in inode_go_dump (5)

When mounting of a corrupted disk image fails, the error message printed
can reference uninitialized inode fields.  To prevent that from happening,
always initialize those fields.

Reported-by: syzbot+aa0730b0a42646eb1359@syzkaller.appspotmail.com
Signed-off-by: Qianqiang Liu <qianqiang.liu@163.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index e22c1edc32b39..b9cef63c78717 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1537,11 +1537,13 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb)
 	if (!ip)
 		return NULL;
 	ip->i_no_addr = 0;
+	ip->i_no_formal_ino = 0;
 	ip->i_flags = 0;
 	ip->i_gl = NULL;
 	gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
 	memset(&ip->i_res, 0, sizeof(ip->i_res));
 	RB_CLEAR_NODE(&ip->i_res.rs_node);
+	ip->i_diskflags = 0;
 	ip->i_rahead = 0;
 	return &ip->i_inode;
 }