From: Qianqiang Liu qianqiang.liu@163.com
[ Upstream commit f9417fcfca3c5e30a0b961e7250fab92cfa5d123 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- fs/gfs2/super.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 6678060ed4d2b..d60d53810bc12 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; }