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authorPravin B Shelar <pshelar@nicira.com>2012-03-23 15:02:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-23 16:58:42 -0700
commit1b26c9b334044cff6d1d2698f2be41bc7d9a0864 (patch)
tree533eb56100209cd0d8ec2c1f3d354af1695226f9 /fs/proc
parentbda7bad62bc4c4e0783348e8db51abe094153c56 (diff)
downloadop-kernel-dev-1b26c9b334044cff6d1d2698f2be41bc7d9a0864.zip
op-kernel-dev-1b26c9b334044cff6d1d2698f2be41bc7d9a0864.tar.gz
proc-ns: use d_set_d_op() API to set dentry ops in proc_ns_instantiate().
The namespace cleanup path leaks a dentry which holds a reference count on a network namespace. Keeping that network namespace from being freed when the last user goes away. Leaving things like vlan devices in the leaked network namespace. If you use ip netns add for much real work this problem becomes apparent pretty quickly. It light testing the problem hides because frequently you simply don't notice the leak. Use d_set_d_op() so that DCACHE_OP_* flags are set correctly. This issue exists back to 3.0. Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Reported-by: Justin Pettit <jpettit@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: Jesse Gross <jesse@nicira.com> Cc: David Miller <davem@davemloft.net> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/namespaces.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 27da860..3551f1f 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -53,7 +53,7 @@ static struct dentry *proc_ns_instantiate(struct inode *dir,
ei->ns_ops = ns_ops;
ei->ns = ns;
- dentry->d_op = &pid_dentry_operations;
+ d_set_d_op(dentry, &pid_dentry_operations);
d_add(dentry, inode);
/* Close the race of the process dying before we return the dentry */
if (pid_revalidate(dentry, NULL))
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