Re: [PATCH 10/13] procfs: make freeing proc_fs_info rcu-delayed

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To: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH 10/13] procfs: make freeing proc_fs_info rcu-delayed
From: Christian Brauner <brauner@xxxxxxxxxx>
Date: Mon, 5 Feb 2024 13:31:02 +0100
Cc: linux-fsdevel@xxxxxxxxxxxxxxx, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, linux-ext4@xxxxxxxxxxxxxxx, linux-nfs@xxxxxxxxxxxxxxx, Miklos Szeredi <miklos@xxxxxxxxxx>, linux-cifs@xxxxxxxxxxxxxxx
In-reply-to: <20240204021739.1157830-10-viro@zeniv.linux.org.uk>
References: <20240204021436.GH2087318@ZenIV> <20240204021739.1157830-1-viro@zeniv.linux.org.uk> <20240204021739.1157830-10-viro@zeniv.linux.org.uk>

On Sun, Feb 04, 2024 at 02:17:36AM +0000, Al Viro wrote:
> makes proc_pid_ns() safe from rcu pathwalk (put_pid_ns()
> is still synchronous, but that's not a problem - it does
> rcu-delay everything that needs to be)
> 
> Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
> ---

Reviewed-by: Christian Brauner <brauner@xxxxxxxxxx>

References:
- [PATCHES] RCU pathwalk race fixes
  - From: Al Viro
- [PATCH 01/13] fs/super.c: don't drop ->s_user_ns until we free struct super_block itself
  - From: Al Viro
- [PATCH 10/13] procfs: make freeing proc_fs_info rcu-delayed
  - From: Al Viro

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