On Wed, 19 May 2021 at 05:29, Yao Haidong yaohaidong369@gmail.com wrote:
Miklos Szeredi miklos@szeredi.hu 于2021年5月18日周二 下午9:41写道：
On Tue, 18 May 2021 at 14:21, Haidong Yao yaohaidong369@gmail.com wrote:
From: Haidong Yao haidong.yao@unisoc.com
[...]
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c index 4d53d3b7e5fe..d9bc658f22ee 100644 --- a/fs/overlayfs/file.c +++ b/fs/overlayfs/file.c @@ -60,7 +60,7 @@ static struct file *ovl_open_realfile(const struct file *file, realfile = open_with_fake_path(&file->f_path, flags, realinode, current_cred()); }
revert_creds(old_cred);
ovl_revert_creds(inode->i_sb, old_cred);Upstream kernel doesn't have ovl_revert_creds().
Hi Miklos:
Sorry, Sometimes，old_cred is NULL. Do you think this is a problem? Can I add ovl_revert_creds()? or You have a better way?
old_cred can't be NULL on upstream (Linus) kernel.
From the taint flags I can see that this is some weird setup. Please
contact the distro that is providing the kerne/modules about this issue. It's not anything the upstream kernel maintainers can help with.
Thanks, Miklos