提交 3e423945 编写于 作者: L Linus Torvalds

devpts: return NULL pts 'priv' entry for non-devpts nodes

In commit 8ead9dd5 ("devpts: more pty driver interface cleanups") I
made devpts_get_priv() just return the dentry->fs_data directly.  And
because I thought it wouldn't happen, I added a warning if you ever saw
a pts node that wasn't on devpts.

And no, that warning never triggered under any actual real use, but you
can trigger it by creating nonsensical pts nodes by hand.

So just revert the warning, and make devpts_get_priv() return NULL for
that case like it used to.
Reported-by: NDmitry Vyukov <dvyukov@google.com>
Cc: stable@vger.kernel.org # 4.6+
Cc: Eric W Biederman" <ebiederm@xmission.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 0141af18
......@@ -585,7 +585,8 @@ struct dentry *devpts_pty_new(struct pts_fs_info *fsi, int index, void *priv)
*/
void *devpts_get_priv(struct dentry *dentry)
{
WARN_ON_ONCE(dentry->d_sb->s_magic != DEVPTS_SUPER_MAGIC);
if (dentry->d_sb->s_magic != DEVPTS_SUPER_MAGIC)
return NULL;
return dentry->d_fsdata;
}
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册