From: David Howells <dhowells@redhat.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: dhowells@redhat.com, Sedat Dilek <sedat.dilek@gmail.com>,
"J. R. Okajima" <hooanon05g@gmail.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Robo Bot <apw@canonical.com>, Felix Fietkau <nbd@openwrt.org>,
Neil Brown <neilb@suse.de>, Jordi Pujol <jordipujolp@gmail.com>,
ezk@fsl.cs.sunysb.edu, "mszeredi@suse.cz" <mszeredi@suse.cz>
Subject: Re: Unionmount and overlayfs testsuite
Date: Tue, 03 Jun 2014 11:33:54 +0100 [thread overview]
Message-ID: <10013.1401791634@warthog.procyon.org.uk> (raw)
In-Reply-To: <CAJfpegtobxoMs+RRrPYLFRPOVSfr_uqZs+HJFLRif3svHGyQwA@mail.gmail.com>
Miklos Szeredi <miklos@szeredi.hu> wrote:
> Fix now pushed to overlayfs.v22/overlayfs.current.
I ran my testscript, which leaves a clean set up and mounted overlay fs
behind. I then ran:
for ((i=100; i<=129; i++)); do mv /mnt/a/foo$i /mnt/a/bar$i; done
for ((i=100; i<=129; i++)); do mv /mnt/a/dir$i /mnt/a/dir2$i; done
leading to:
=============================================
[ INFO: possible recursive locking detected ]
3.15.0-rc6-fsdevel+ #382 Tainted: G W
---------------------------------------------
mv/27935 is trying to acquire lock:
(&sb->s_type->i_mutex_key#9){+.+.+.}, at: [<ffffffff8111e555>] vfs_rmdir+0x59/0xe8
but task is already holding lock:
(&sb->s_type->i_mutex_key#9){+.+.+.}, at: [<ffffffff811e12a9>] ovl_clear_empty+0x175/0x1eb
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&sb->s_type->i_mutex_key#9);
lock(&sb->s_type->i_mutex_key#9);
*** DEADLOCK ***
May be due to missing lock nesting notation
5 locks held by mv/27935:
#0: (sb_writers#15){.+.+.+}, at: [<ffffffff8112c06c>] mnt_want_write+0x1c/0x40
#1: (&sb->s_type->i_mutex_key#17/1){+.+.+.}, at: [<ffffffff8111eb96>] do_rmdir+0x9f/0x152
#2: (&sb->s_type->i_mutex_key#17){+.+.+.}, at: [<ffffffff8111e555>] vfs_rmdir+0x59/0xe8
#3: (sb_writers#8){.+.+.+}, at: [<ffffffff8112c06c>] mnt_want_write+0x1c/0x40
#4: (&sb->s_type->i_mutex_key#9){+.+.+.}, at: [<ffffffff811e12a9>] ovl_clear_empty+0x175/0x1eb
stack backtrace:
CPU: 1 PID: 27935 Comm: mv Tainted: G W 3.15.0-rc6-fsdevel+ #382
Hardware name: /DG965RY, BIOS MQ96510J.86A.0816.2006.0716.2308 07/16/2006
0000000000000000 ffff880038ac9af0 ffffffff8148b889 ffffffff81fda190
ffff880038ac9bb0 ffffffff81074b0e 0000000000000002 ffff88003823c890
0000000000000000 ffff880000000000 ffff880000000004 ffff880000000000
Call Trace:
[<ffffffff8148b889>] dump_stack+0x4d/0x66
[<ffffffff81074b0e>] __lock_acquire+0x75a/0x1861
[<ffffffff810762b6>] lock_acquire+0x9c/0x112
[<ffffffff8111e555>] ? vfs_rmdir+0x59/0xe8
[<ffffffff8148e6df>] mutex_lock_nested+0x60/0x2ff
[<ffffffff8111e555>] ? vfs_rmdir+0x59/0xe8
[<ffffffff8111e555>] vfs_rmdir+0x59/0xe8
[<ffffffff811e0fbe>] ovl_cleanup+0x1d/0x40
[<ffffffff811e12b4>] ovl_clear_empty+0x180/0x1eb
[<ffffffff811e1360>] ovl_check_empty_and_clear+0x41/0x5c
[<ffffffff81058fcc>] ? creds_are_invalid+0x18/0x45
[<ffffffff811e1aca>] ovl_do_remove+0x17c/0x35e
[<ffffffff811e1cbd>] ovl_rmdir+0x11/0x13
[<ffffffff8111e584>] vfs_rmdir+0x88/0xe8
[<ffffffff8111ebdd>] do_rmdir+0xe6/0x152
[<ffffffff810af5b4>] ? __audit_syscall_entry+0xa1/0xc3
[<ffffffff8100d737>] ? syscall_trace_enter+0x197/0x1eb
[<ffffffff8111f414>] SyS_unlinkat+0x16/0x29
[<ffffffff814925f4>] tracesys+0xdd/0xe2
next prev parent reply other threads:[~2014-06-03 10:34 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-23 9:43 [PATCH 00/13] overlay filesystem v22 Miklos Szeredi
2014-05-23 9:43 ` [PATCH 01/13] vfs: add i_op->dentry_open() Miklos Szeredi
2014-05-23 9:43 ` [PATCH 02/13] vfs: export do_splice_direct() to modules Miklos Szeredi
2014-05-23 9:43 ` [PATCH 03/13] vfs: export __inode_permission() " Miklos Szeredi
2014-05-23 9:43 ` [PATCH 04/13] vfs: introduce clone_private_mount() Miklos Szeredi
2014-05-23 9:43 ` [PATCH 05/13] vfs: export check_sticky() Miklos Szeredi
2014-05-23 9:43 ` [PATCH 06/13] vfs: add whiteout support Miklos Szeredi
2014-05-24 8:29 ` Tetsuo Handa
2014-05-23 9:43 ` [PATCH 07/13] vfs: add RENAME_WHITEOUT Miklos Szeredi
2014-05-24 8:02 ` Azat Khuzhin
2014-05-23 9:43 ` [PATCH 08/13] overlay filesystem Miklos Szeredi
2014-05-23 9:43 ` [PATCH 09/13] overlayfs: add statfs support Miklos Szeredi
2014-05-23 9:43 ` [PATCH 10/13] overlayfs: implement show_options Miklos Szeredi
2014-05-23 9:43 ` [PATCH 11/13] overlay: overlay filesystem documentation Miklos Szeredi
2014-05-23 9:43 ` [PATCH 12/13] fs: limit filesystem stacking depth Miklos Szeredi
2014-05-23 9:43 ` [PATCH 13/13] vfs: dcache: Export d_ancestor to modules Miklos Szeredi
2014-05-26 1:56 ` [PATCH 00/13] overlay filesystem v22 J. R. Okajima
2014-05-28 16:06 ` Miklos Szeredi
2014-05-29 10:26 ` David Howells
2014-05-29 11:26 ` Miklos Szeredi
2014-05-29 10:54 ` Kernel errors with " David Howells
2014-05-29 11:16 ` David Howells
2014-05-29 11:28 ` David Howells
2014-05-29 12:07 ` Miklos Szeredi
2014-05-29 16:06 ` Miklos Szeredi
2014-05-29 16:10 ` Sedat Dilek
2014-05-29 16:23 ` More kernel " David Howells
2014-05-29 16:36 ` Miklos Szeredi
2014-05-29 16:44 ` David Howells
2014-05-29 16:48 ` Unionmount and overlayfs testsuite David Howells
2014-05-29 17:11 ` Sedat Dilek
2014-05-29 17:15 ` David Howells
2014-05-29 17:19 ` Sedat Dilek
2014-05-29 17:24 ` David Howells
2014-05-29 17:36 ` Sedat Dilek
2014-05-29 17:41 ` David Howells
2014-05-29 17:44 ` Sedat Dilek
2014-05-29 18:22 ` David Howells
2014-05-29 18:44 ` Sedat Dilek
2014-05-29 18:53 ` Sedat Dilek
2014-05-29 19:20 ` David Howells
2014-05-29 19:24 ` Sedat Dilek
2014-05-29 19:25 ` David Howells
2014-05-29 19:28 ` Sedat Dilek
2014-05-29 19:35 ` David Howells
2014-05-29 20:00 ` Sedat Dilek
2014-05-29 20:59 ` David Howells
2014-05-30 4:15 ` Sedat Dilek
2014-05-30 4:29 ` Sedat Dilek
2014-05-30 7:54 ` David Howells
2014-05-29 17:35 ` Sedat Dilek
2014-05-29 17:50 ` David Howells
2014-05-29 17:58 ` Sedat Dilek
2014-05-29 18:23 ` Dave Jones
2014-05-29 18:27 ` David Howells
2014-05-29 17:17 ` David Howells
2014-05-29 23:21 ` Dave Chinner
2014-05-30 3:35 ` J. R. Okajima
2014-05-30 4:44 ` J. R. Okajima
2014-05-30 8:49 ` David Howells
2014-05-30 9:15 ` J. R. Okajima
2014-06-03 8:08 ` Sedat Dilek
2014-06-03 9:00 ` David Howells
2014-06-03 9:12 ` Miklos Szeredi
2014-06-03 9:18 ` Sedat Dilek
2014-06-03 9:26 ` Sedat Dilek
2014-06-03 9:39 ` Sedat Dilek
2014-06-03 9:42 ` Miklos Szeredi
2014-06-03 10:15 ` Sedat Dilek
2014-06-03 10:21 ` Sedat Dilek
2014-06-03 10:55 ` Sedat Dilek
2014-06-03 10:33 ` David Howells [this message]
2014-06-03 13:21 ` Miklos Szeredi
2014-06-03 14:26 ` Sedat Dilek
2014-06-03 15:30 ` David Howells
2014-06-03 15:53 ` Miklos Szeredi
2014-06-05 22:16 ` David Howells
2014-06-24 16:46 ` Overlayfs rename bug David Howells
2014-07-08 9:29 ` Miklos Szeredi
2014-07-08 9:56 ` David Howells
2014-07-09 14:14 ` Miklos Szeredi
2014-05-30 9:14 ` Unionmount and overlayfs testsuite David Howells
2014-05-29 17:29 ` Kernel errors with overlay filesystem v22 David Howells
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