linux-ext4 - Re: [PATCH 01/13] fs/super.c: don't drop ->s_user_ns until we free struct super

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Date: Mon, 5 Feb 2024 13:24:37 +0100
From: Christian Brauner <brauner@...nel.org>
To: Al Viro <viro@...iv.linux.org.uk>
Cc: linux-fsdevel@...r.kernel.org, 
	Linus Torvalds <torvalds@...ux-foundation.org>, linux-ext4@...r.kernel.org, linux-nfs@...r.kernel.org, 
	Miklos Szeredi <miklos@...redi.hu>, linux-cifs@...r.kernel.org
Subject: Re: [PATCH 01/13] fs/super.c: don't drop ->s_user_ns until we free
 struct super_block itself

On Sun, Feb 04, 2024 at 02:17:27AM +0000, Al Viro wrote:
> Avoids fun races in RCU pathwalk...  Same goes for freeing LSM shite
> hanging off super_block's arse.
> 
> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> ---

Hah, I once had the same patch for the userns bit because I was
wondering about that,

Reviewed-by: Christian Brauner <brauner@...nel.org>

(Independent of whether or not this is pretty the s_user_ns should
probably be a separate type so it can't be confused with other
namespaces when checking permissions. Maybe I should respin my series
for that if I find the time.)