From: Andrew W Elble <aweits@rit.edu>
To: Jeff Layton <jlayton@poochiereds.net>
Cc: Oleg Drokin <green@linuxhacker.ru>,
"J. Bruce Fields" <bfields@fieldses.org>,
linux-nfs@vger.kernel.org,
"<linux-kernel@vger.kernel.org> Mailing List"
<linux-kernel@vger.kernel.org>
Subject: Re: Files leak from nfsd in 4.7.1-rc1 (and more?)
Date: Thu, 09 Jun 2016 08:13:18 -0400 [thread overview]
Message-ID: <m2a8iuy2zl.fsf@discipline.rit.edu> (raw)
In-Reply-To: <1465383501.27742.19.camel@poochiereds.net> (Jeff Layton's message of "Wed, 08 Jun 2016 06:58:21 -0400")
> But...suppose we have two racing OPEN calls. They're both in
> nfs4_get_vfs_file. One opens the file and succeeds and the other fails
> and ends up in out_put_access. At that point, you could end up
> clobbering the successful update to st_access_bmap from the other task,
> and we'd end up not putting the file access references in
> release_all_access.
Pondering further (with an assumption about the workload), isn't this
path also likely to involve a lease break in progress on that file?
Thanks,
Andy
--
Andrew W. Elble
aweits@discipline.rit.edu
Infrastructure Engineer, Communications Technical Lead
Rochester Institute of Technology
PGP: BFAD 8461 4CCF DC95 DA2C B0EB 965B 082E 863E C912
prev parent reply other threads:[~2016-06-09 12:20 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 15:37 Files leak from nfsd in 4.7.1-rc1 (and more?) Oleg Drokin
2016-06-07 17:10 ` Jeff Layton
2016-06-07 17:30 ` Oleg Drokin
2016-06-07 20:04 ` Jeff Layton
2016-06-07 23:39 ` Oleg Drokin
2016-06-08 0:03 ` Jeff Layton
2016-06-08 0:46 ` Oleg Drokin
2016-06-08 2:22 ` Oleg Drokin
2016-06-08 3:55 ` Oleg Drokin
2016-06-08 10:58 ` Jeff Layton
2016-06-08 14:44 ` Oleg Drokin
2016-06-08 16:10 ` Oleg Drokin
2016-06-08 17:22 ` Jeff Layton
2016-06-08 17:37 ` Oleg Drokin
2016-06-09 2:55 ` [PATCH] nfsd: Always lock state exclusively Oleg Drokin
2016-06-09 10:13 ` Jeff Layton
2016-06-09 21:01 ` [PATCH] nfsd: Close a race between access checking/setting in nfs4_get_vfs_file Oleg Drokin
2016-06-10 4:18 ` Oleg Drokin
2016-06-10 10:50 ` Jeff Layton
2016-06-10 20:55 ` J . Bruce Fields
2016-06-11 15:41 ` Oleg Drokin
2016-06-12 1:33 ` Jeff Layton
2016-06-12 2:06 ` Oleg Drokin
2016-06-12 2:50 ` Jeff Layton
2016-06-12 3:15 ` Oleg Drokin
2016-06-12 13:13 ` Jeff Layton
2016-06-13 1:26 ` [PATCH v2] nfsd: Always lock state exclusively Oleg Drokin
2016-06-14 15:38 ` J . Bruce Fields
2016-06-14 15:53 ` Oleg Drokin
2016-06-14 18:50 ` J . Bruce Fields
2016-06-14 22:52 ` Jeff Layton
2016-06-14 22:54 ` Oleg Drokin
2016-06-14 22:57 ` Jeff Layton
2016-06-15 3:28 ` [PATCH 0/3] nfsd state handling fixes Oleg Drokin
2016-06-15 3:28 ` [PATCH 1/3] nfsd: Always lock state exclusively Oleg Drokin
2016-06-15 3:28 ` [PATCH 2/3] nfsd: Extend the mutex holding region around in nfsd4_process_open2() Oleg Drokin
2016-06-15 3:28 ` [PATCH 3/3] nfsd: Make init_open_stateid() a bit more whole Oleg Drokin
2016-06-16 1:54 ` [PATCH 0/3] nfsd state handling fixes Oleg Drokin
2016-06-16 2:07 ` J . Bruce Fields
2016-06-14 15:46 ` [PATCH v2] nfsd: Always lock state exclusively J . Bruce Fields
2016-06-14 15:56 ` Oleg Drokin
2016-06-14 18:46 ` J . Bruce Fields
2016-06-15 2:19 ` Oleg Drokin
2016-06-15 13:31 ` J . Bruce Fields
2016-06-09 12:13 ` Andrew W Elble [this message]
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