78 lines
3.3 KiB
Diff
78 lines
3.3 KiB
Diff
From 7537e6e6e9984d86c0e4282f9dbe3b5872b3b761 Mon Sep 17 00:00:00 2001
|
|
From: Cong Wang <xiyou.wangcong@gmail.com>
|
|
Date: Sat, 16 Aug 2014 12:36:46 -0700
|
|
Subject: [PATCH] nfs: fix kernel warning when removing proc entry
|
|
|
|
I saw the following kernel warning:
|
|
|
|
[ 1852.321222] ------------[ cut here ]------------
|
|
[ 1852.326527] WARNING: CPU: 0 PID: 118 at fs/proc/generic.c:521 remove_proc_entry+0x154/0x16b()
|
|
[ 1852.335630] remove_proc_entry: removing non-empty directory 'fs/nfsfs', leaking at least 'volumes'
|
|
[ 1852.344084] CPU: 0 PID: 118 Comm: kworker/u8:2 Not tainted 3.16.0+ #540
|
|
[ 1852.350036] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
|
|
[ 1852.354992] Workqueue: netns cleanup_net
|
|
[ 1852.358701] 0000000000000000 ffff880116f2fbd0 ffffffff819c03e9 ffff880116f2fc18
|
|
[ 1852.366474] ffff880116f2fc08 ffffffff810744ee ffffffff811e0e6e ffff8800d4e96238
|
|
[ 1852.373507] ffffffff81dbe665 ffff8800d46a5948 0000000000000005 ffff880116f2fc68
|
|
[ 1852.380224] Call Trace:
|
|
[ 1852.381976] [<ffffffff819c03e9>] dump_stack+0x4d/0x66
|
|
[ 1852.385495] [<ffffffff810744ee>] warn_slowpath_common+0x7a/0x93
|
|
[ 1852.389869] [<ffffffff811e0e6e>] ? remove_proc_entry+0x154/0x16b
|
|
[ 1852.393987] [<ffffffff8107457b>] warn_slowpath_fmt+0x4c/0x4e
|
|
[ 1852.397999] [<ffffffff811e0e6e>] remove_proc_entry+0x154/0x16b
|
|
[ 1852.402034] [<ffffffff8129c73d>] nfs_fs_proc_net_exit+0x53/0x56
|
|
[ 1852.406136] [<ffffffff812a103b>] nfs_net_exit+0x12/0x1d
|
|
[ 1852.409774] [<ffffffff81785bc9>] ops_exit_list+0x44/0x55
|
|
[ 1852.413529] [<ffffffff81786389>] cleanup_net+0xee/0x182
|
|
[ 1852.417198] [<ffffffff81088c9e>] process_one_work+0x209/0x40d
|
|
[ 1852.502320] [<ffffffff81088bf7>] ? process_one_work+0x162/0x40d
|
|
[ 1852.587629] [<ffffffff810890c1>] worker_thread+0x1f0/0x2c7
|
|
[ 1852.673291] [<ffffffff81088ed1>] ? process_scheduled_works+0x2f/0x2f
|
|
[ 1852.759470] [<ffffffff8108e079>] kthread+0xc9/0xd1
|
|
[ 1852.843099] [<ffffffff8109427f>] ? finish_task_switch+0x3a/0xce
|
|
[ 1852.926518] [<ffffffff8108dfb0>] ? __kthread_parkme+0x61/0x61
|
|
[ 1853.008565] [<ffffffff819cbeac>] ret_from_fork+0x7c/0xb0
|
|
[ 1853.076477] [<ffffffff8108dfb0>] ? __kthread_parkme+0x61/0x61
|
|
[ 1853.140653] ---[ end trace 69c4c6617f78e32d ]---
|
|
|
|
It looks wrong that we add "/proc/net/nfsfs" in nfs_fs_proc_net_init()
|
|
while remove "/proc/fs/nfsfs" in nfs_fs_proc_net_exit().
|
|
|
|
Bugzilla: 1132368
|
|
Upstream-status: Sent for 3.17-rcX
|
|
|
|
Fixes: commit 65b38851a17 (NFS: Fix /proc/fs/nfsfs/servers and /proc/fs/nfsfs/volumes)
|
|
Cc: Eric W. Biederman <ebiederm@xmission.com>
|
|
Cc: Trond Myklebust <trond.myklebust@primarydata.com>
|
|
Cc: Dan Aloni <dan@kernelim.com>
|
|
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
|
|
---
|
|
fs/nfs/client.c | 4 ++--
|
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
|
|
index 1c5ff6d58385..c117b96c7da9 100644
|
|
--- a/fs/nfs/client.c
|
|
+++ b/fs/nfs/client.c
|
|
@@ -1418,7 +1418,7 @@ int nfs_fs_proc_net_init(struct net *net)
|
|
error_2:
|
|
remove_proc_entry("servers", nn->proc_nfsfs);
|
|
error_1:
|
|
- remove_proc_entry("fs/nfsfs", NULL);
|
|
+ remove_proc_entry("nfsfs", net->proc_net);
|
|
error_0:
|
|
return -ENOMEM;
|
|
}
|
|
@@ -1429,7 +1429,7 @@ void nfs_fs_proc_net_exit(struct net *net)
|
|
|
|
remove_proc_entry("volumes", nn->proc_nfsfs);
|
|
remove_proc_entry("servers", nn->proc_nfsfs);
|
|
- remove_proc_entry("fs/nfsfs", NULL);
|
|
+ remove_proc_entry("nfsfs", net->proc_net);
|
|
}
|
|
|
|
/*
|
|
--
|
|
1.9.3
|
|
|