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procfs: fix a vfsmount longterm reference leak

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kern_mount() doesn't pair with plain mntput()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2011-12-08 23:20:45 -05:00
parent 09d9673d53
commit 905ad269c5
1 changed files with 3 additions and 5 deletions
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8
fs/proc/root.c
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@ -91,20 +91,18 @@ static struct file_system_type proc_fs_type = {
void __init proc_root_init(void)
{
struct vfsmount *mnt;
int err;
proc_init_inodecache();
err = register_filesystem(&proc_fs_type);
if (err)
return;
mnt = kern_mount_data(&proc_fs_type, &init_pid_ns);
if (IS_ERR(mnt)) {
err = pid_ns_prepare_proc(&init_pid_ns);
if (err) {
unregister_filesystem(&proc_fs_type);
return;
}
init_pid_ns.proc_mnt = mnt;
proc_symlink("mounts", NULL, "self/mounts");
proc_net_init();
@ -209,5 +207,5 @@ int pid_ns_prepare_proc(struct pid_namespace *ns)
void pid_ns_release_proc(struct pid_namespace *ns)
{
mntput(ns->proc_mnt);
kern_unmount(ns->proc_mnt);
}