From: Al Viro <viro@zeniv.linux.org.uk>
To: Christoph Hellwig <hch@lst.de>
Cc: Christian Brauner <brauner@kernel.org>,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Paul Moore <paul@paul-moore.com>,
Stephen Smalley <stephen.smalley.work@gmail.com>,
Eric Paris <eparis@parisplace.org>,
linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org,
selinux@vger.kernel.org
Subject: Re: [PATCH 2/4] devpts: free sb->s_fs_info after shutting down the super block
Date: Thu, 31 Aug 2023 07:31:08 +0100 [thread overview]
Message-ID: <20230831063108.GE3390869@ZenIV> (raw)
In-Reply-To: <20230831053157.256319-3-hch@lst.de>
On Thu, Aug 31, 2023 at 07:31:55AM +0200, Christoph Hellwig wrote:
> sb->s_fs_info can only be safely freed after generic_shutdown_super was
> called and all access to the super_block has stopped.
Similar to ramfs case; nothing in dentry/inode eviction codepaths is
using anything in ->s_fs_info. And references in tty are holding
an active ref to superblock in question, preventing ->kill_sb(), so
nothing from the outside is going to play with e.g. devpts_{new,kill}_index()
under us.
next prev parent reply other threads:[~2023-08-31 6:31 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-31 5:31 sb->s_fs_info freeing fixes Christoph Hellwig
2023-08-31 5:31 ` [PATCH 1/4] ramfs: free sb->s_fs_info after shutting down the super block Christoph Hellwig
2023-08-31 6:25 ` Al Viro
2023-08-31 5:31 ` [PATCH 2/4] devpts: " Christoph Hellwig
2023-08-31 6:31 ` Al Viro [this message]
2023-08-31 5:31 ` [PATCH 3/4] selinuxfs: " Christoph Hellwig
2023-08-31 6:33 ` Al Viro
2023-08-31 5:31 ` [PATCH 4/4] hypfs: " Christoph Hellwig
2023-08-31 6:37 ` Al Viro
2023-08-31 10:20 ` sb->s_fs_info freeing fixes Christian Brauner
2023-08-31 10:29 ` Christian Brauner
2023-08-31 12:36 ` Christoph Hellwig
2023-08-31 13:11 ` Christian Brauner
2023-08-31 14:38 ` Paul Moore
2023-08-31 14:39 ` Christoph Hellwig
2023-08-31 14:49 ` Paul Moore
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