Merge branch 'master' of vparabola:abslibre

1 files changed, 143 insertions, 0 deletions

diff --git a/kernels/linux-libre-grsec/0002-sunrpc-replace-sunrpc_net-gssd_running-flag-with-a-m.patch b/kernels/linux-libre-grsec/0002-sunrpc-replace-sunrpc_net-gssd_running-flag-with-a-m.patch
new file mode 100644
index 000000000..19e04da5d
--- /dev/null
+++ b/kernels/linux-libre-grsec/0002-sunrpc-replace-sunrpc_net-gssd_running-flag-with-a-m.patch
@@ -0,0 +1,143 @@
+From 89f842435c630f8426f414e6030bc2ffea0d6f81 Mon Sep 17 00:00:00 2001
+From: Jeff Layton <jlayton@redhat.com>
+Date: Thu, 14 Nov 2013 07:25:18 -0500
+Subject: [PATCH 2/6] sunrpc: replace sunrpc_net->gssd_running flag with a more
+ reliable check
+
+Now that we have a more reliable method to tell if gssd is running, we
+can replace the sn->gssd_running flag with a function that will query to
+see if it's up and running.
+
+There's also no need to attempt an upcall that we know will fail, so
+just return -EACCES if gssd isn't running. Finally, fix the warn_gss()
+message not to claim that that the upcall timed out since we don't
+necesarily perform one now when gssd isn't running, and remove the
+extraneous newline from the message.
+
+Signed-off-by: Jeff Layton <jlayton@redhat.com>
+Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
+---
+ include/linux/sunrpc/rpc_pipe_fs.h |  2 ++
+ net/sunrpc/auth_gss/auth_gss.c     | 17 +++++++----------
+ net/sunrpc/netns.h                 |  2 --
+ net/sunrpc/rpc_pipe.c              | 14 ++++++++++----
+ 4 files changed, 19 insertions(+), 16 deletions(-)
+
+diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
+index 85f1342..7f490be 100644
+--- a/include/linux/sunrpc/rpc_pipe_fs.h
++++ b/include/linux/sunrpc/rpc_pipe_fs.h
+@@ -131,5 +131,7 @@ extern int rpc_unlink(struct dentry *);
+ extern int register_rpc_pipefs(void);
+ extern void unregister_rpc_pipefs(void);
+ 
++extern bool gssd_running(struct net *net);
++
+ #endif
+ #endif
+diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
+index 42fdfc6..0a2aee0 100644
+--- a/net/sunrpc/auth_gss/auth_gss.c
++++ b/net/sunrpc/auth_gss/auth_gss.c
+@@ -536,8 +536,7 @@ static void warn_gssd(void)
+ 	unsigned long now = jiffies;
+ 
+ 	if (time_after(now, ratelimit)) {
+-		printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
+-				"Please check user daemon is running.\n");
++		pr_warn("RPC: AUTH_GSS upcall failed. Please check user daemon is running.\n");
+ 		ratelimit = now + 15*HZ;
+ 	}
+ }
+@@ -600,7 +599,6 @@ gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
+ 	struct rpc_pipe *pipe;
+ 	struct rpc_cred *cred = &gss_cred->gc_base;
+ 	struct gss_upcall_msg *gss_msg;
+-	unsigned long timeout;
+ 	DEFINE_WAIT(wait);
+ 	int err;
+ 
+@@ -608,17 +606,16 @@ gss_create_upcall(struct gss_auth *gss_auth, struct gss_cred *gss_cred)
+ 		__func__, from_kuid(&init_user_ns, cred->cr_uid));
+ retry:
+ 	err = 0;
+-	/* Default timeout is 15s unless we know that gssd is not running */
+-	timeout = 15 * HZ;
+-	if (!sn->gssd_running)
+-		timeout = HZ >> 2;
++	/* if gssd is down, just skip upcalling altogether */
++	if (!gssd_running(net)) {
++		warn_gssd();
++		return -EACCES;
++	}
+ 	gss_msg = gss_setup_upcall(gss_auth, cred);
+ 	if (PTR_ERR(gss_msg) == -EAGAIN) {
+ 		err = wait_event_interruptible_timeout(pipe_version_waitqueue,
+-				sn->pipe_version >= 0, timeout);
++				sn->pipe_version >= 0, 15 * HZ);
+ 		if (sn->pipe_version < 0) {
+-			if (err == 0)
+-				sn->gssd_running = 0;
+ 			warn_gssd();
+ 			err = -EACCES;
+ 		}
+diff --git a/net/sunrpc/netns.h b/net/sunrpc/netns.h
+index 8a8e841..94e506f 100644
+--- a/net/sunrpc/netns.h
++++ b/net/sunrpc/netns.h
+@@ -33,8 +33,6 @@ struct sunrpc_net {
+ 	int pipe_version;
+ 	atomic_t pipe_users;
+ 	struct proc_dir_entry *use_gssp_proc;
+-
+-	unsigned int gssd_running;
+ };
+ 
+ extern int sunrpc_net_id;
+diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
+index c23458b..5cd7ad1 100644
+--- a/net/sunrpc/rpc_pipe.c
++++ b/net/sunrpc/rpc_pipe.c
+@@ -216,14 +216,11 @@ rpc_destroy_inode(struct inode *inode)
+ static int
+ rpc_pipe_open(struct inode *inode, struct file *filp)
+ {
+-	struct net *net = inode->i_sb->s_fs_info;
+-	struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
+ 	struct rpc_pipe *pipe;
+ 	int first_open;
+ 	int res = -ENXIO;
+ 
+ 	mutex_lock(&inode->i_mutex);
+-	sn->gssd_running = 1;
+ 	pipe = RPC_I(inode)->pipe;
+ 	if (pipe == NULL)
+ 		goto out;
+@@ -1222,7 +1219,6 @@ int rpc_pipefs_init_net(struct net *net)
+ 		return PTR_ERR(sn->gssd_dummy);
+ 
+ 	mutex_init(&sn->pipefs_sb_lock);
+-	sn->gssd_running = 1;
+ 	sn->pipe_version = -1;
+ 	return 0;
+ }
+@@ -1376,6 +1372,16 @@ err_depopulate:
+ 	return err;
+ }
+ 
++bool
++gssd_running(struct net *net)
++{
++	struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
++	struct rpc_pipe *pipe = sn->gssd_dummy;
++
++	return pipe->nreaders || pipe->nwriters;
++}
++EXPORT_SYMBOL_GPL(gssd_running);
++
+ static struct dentry *
+ rpc_mount(struct file_system_type *fs_type,
+ 		int flags, const char *dev_name, void *data)
+-- 
+1.8.5.3
+