lkml.org 
[lkml]   [2019]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: WARNING: lock held when returning to user space in grab_super
On Thu, Jan 03, 2019 at 01:49:55AM +0900, Tetsuo Handa wrote:
> kernfs_node_dentry() calls lookup_one_len_unlocked() which involves
> memory allocation, and memory allocation fault injection made
> lookup_one_len_unlocked() fail, and thus kernfs_node_dentry() failed.
> What's strange?

So, kernfs_node_dentry() is called on the root kn, which should
trigger "if (!kn->parent) return dentry" in kernfs_node_dentry(), so
it shouldn't reach lookup_on_len_unlocked(). Oh I see. This is the
namespaced mount path, so kn can be non-root. Will fix it.

Thanks.

--
tejun

\
 
 \ /
  Last update: 2019-01-02 17:56    [W:0.036 / U:0.128 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site