linux-kernel - Re: [PATCH] fs: drop peer group ids under namespace lock

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Message-Id: <20230331-angler-enjoyer-820f825d7646@brauner>
Date:   Fri, 31 Mar 2023 12:36:06 +0200
From:   Christian Brauner <brauner@...nel.org>
To:     linux-fsdevel@...r.kernel.org
Cc:     Christian Brauner <brauner@...nel.org>,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk,
        syzbot+8ac3859139c685c4f597@...kaller.appspotmail.com,
        stable@...r.kernel.org
Subject: Re: [PATCH] fs: drop peer group ids under namespace lock


On Thu, 30 Mar 2023 09:13:16 +0200, Christian Brauner wrote:
> When cleaning up peer group ids in the failure path we need to make sure
> to hold on to the namespace lock. Otherwise another thread might just
> turn the mount from a shared into a non-shared mount concurrently.
> 
> 

Ok, syzbot is happy with this as well so let's get this fixed and backported,

tree: git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping.git
branch: vfs.misc.fixes
[1/1] fs: drop peer group ids under namespace lock
      commit: cb2239c198ad9fbd5aced22cf93e45562da781eb