lkml.org 
[lkml]   [2017]   [Nov]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: general protection fault in __list_del_entry_valid (2)
On Tue 21-11-17 15:05:00, Michal Hocko wrote:
> [Cc Al and Dave - email thread starts http://lkml.kernel.org/r/001a113f996099503a055e793dd3@google.com]
[...]
> Something like the totally untested and possibly wrong
> ---
> diff --git a/fs/super.c b/fs/super.c
> index 994db21f59bf..1eb850413fdf 100644
> --- a/fs/super.c
> +++ b/fs/super.c
> @@ -506,6 +506,11 @@ struct super_block *sget_userns(struct file_system_type *type,
> s = alloc_super(type, (flags & ~SB_SUBMOUNT), user_ns);
> if (!s)
> return ERR_PTR(-ENOMEM);
> + if (register_shrinker(&s->s_shrink)) {
> + up_write(&s->s_umount);
> + destroy_super(s);
> + return ERR_PTR(-ENOMEM);
> + }
> goto retry;
> }
>
> @@ -522,7 +527,6 @@ struct super_block *sget_userns(struct file_system_type *type,
> hlist_add_head(&s->s_instances, &type->fs_supers);
> spin_unlock(&sb_lock);
> get_filesystem(type);
> - register_shrinker(&s->s_shrink);
> return s;
> }

This is not complete. I thought we would unregister the shrinker
somewher in destroy_super path but this is not the case. I will send
another patch along with other shrinkers registration fixes in a
separate thread.

--
Michal Hocko
SUSE Labs

\
 
 \ /
  Last update: 2017-11-23 12:27    [W:0.040 / U:32.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site