From: Matthew Wilcox <willy@infradead.org>
To: Thiago Rafael Becker <thiago.becker@gmail.com>
Cc: viro@zeniv.linux.org.uk, schwidefsky@de.ibm.com,
bfields@fieldses.org, neilb@suse.com, linux-nfs@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5] kernel: make groups_sort calling a responsibility group_info allocators
Date: Mon, 11 Dec 2017 07:24:18 -0800 [thread overview]
Message-ID: <20171211152418.GA10521@bombadil.infradead.org> (raw)
In-Reply-To: <20171211151420.18655-1-thiago.becker@gmail.com>
On Mon, Dec 11, 2017 at 01:14:20PM -0200, Thiago Rafael Becker wrote:
> In testing, we found that nfsd threads may call set_groups in parallel for
> the same entry cached in auth.unix.gid, racing in the call of groups_sort,
> corrupting the groups for that entry and leading to permission denials for
> the client.
>
> This patch:
> - Make groups_sort globally visible.
> - Move the call to groups_sort to the modifiers of group_info
> - Remove the call to groups_sort from set_groups
>
> Signed-off-by: Thiago Rafael Becker <thiago.becker@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
next prev parent reply other threads:[~2017-12-11 15:24 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-30 13:04 [PATCH 0/3, V2] Move groups_sort outisde of set_groups Thiago Rafael Becker
2017-11-30 13:04 ` [PATCH 1/3, V2] kernel: make groups_sort globally visible Thiago Rafael Becker
2017-11-30 13:04 ` [PATCH 2/3, V2] kernel: Move groups_sort to the caller of set_groups Thiago Rafael Becker
2017-12-03 12:56 ` kbuild test robot
2017-12-04 1:42 ` NeilBrown
2017-12-04 15:39 ` Thiago Rafael Becker
2017-12-04 15:47 ` J. Bruce Fields
2017-12-04 19:00 ` Thiago Rafael Becker
2017-12-04 20:11 ` NeilBrown
2017-12-05 21:28 ` Matthew Wilcox
2017-12-05 22:05 ` NeilBrown
2017-12-05 23:03 ` Thiago Rafael Becker
2017-12-05 23:23 ` Matthew Wilcox
2017-12-19 16:30 ` J. Bruce Fields
2017-12-19 20:14 ` NeilBrown
2017-11-30 13:04 ` [PATCH 3/3, V2] kernel: set_groups doesn't call groups_sort anymore Thiago Rafael Becker
2017-12-05 14:05 ` [PATCH 0/3 v3] Move groups_sort outisde of set_groups Thiago Rafael Becker
2017-12-05 14:05 ` [PATCH 1/3 v3] kernel: make groups_sort globally visible Thiago Rafael Becker
2017-12-05 14:05 ` [PATCH 2/3 v3] kernel: Move groups_sort to the caller of set_groups Thiago Rafael Becker
2017-12-05 18:55 ` [PATCH 2/3] " Thiago Rafael Becker
2017-12-05 22:08 ` NeilBrown
2017-12-05 18:57 ` [PATCH 2/3 v3] " Thiago Rafael Becker
2017-12-05 14:05 ` [PATCH 3/3 v3] kernel: set_groups doesn't call groups_sort anymore Thiago Rafael Becker
2017-12-06 19:27 ` [PATCH 0/3 v3] Move groups_sort outisde of set_groups J. Bruce Fields
2017-12-11 13:28 ` [PATCH v4] kernel: make groups_sort calling a responsibility group_info allocators Thiago Rafael Becker
2017-12-11 14:27 ` Matthew Wilcox
2017-12-11 15:14 ` [PATCH v5] " Thiago Rafael Becker
2017-12-11 15:24 ` Matthew Wilcox [this message]
2017-12-11 16:18 ` J. Bruce Fields
2017-12-11 21:43 ` NeilBrown
2018-01-02 14:54 ` David Howells
2018-01-02 21:01 ` [PATCH] Documentation: security/credentials.rst: explain need to sort group_list NeilBrown
2018-01-02 21:04 ` Matthew Wilcox
2018-01-06 18:09 ` Jonathan Corbet
2018-01-06 20:20 ` Matthew Wilcox
2018-01-06 22:36 ` Randy Dunlap
2018-01-08 16:36 ` Jonathan Corbet
2018-01-07 23:39 ` NeilBrown
2018-01-08 16:40 ` Jonathan Corbet
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