sunrpc: fix error path in module_init

register_rpc_pipefs() needs to clean up rpc_inode_cache
by kmem_cache_destroy() on register_filesystem() failure.

init_sunrpc() needs to unregister rpc_pipe_fs by unregister_rpc_pipefs()
when rpc_init_mempool() returns error.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 12 insertions, 3 deletions

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index ad39b47e05bc..a2f1893bde53 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -845,6 +845,8 @@ init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
 
 int register_rpc_pipefs(void)
 {
+        int err;
+
         rpc_inode_cachep = kmem_cache_create("rpc_inode_cache",
                                 sizeof(struct rpc_inode),
                                 0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
@@ -852,7 +854,12 @@ int register_rpc_pipefs(void)
                                 init_once, NULL);
         if (!rpc_inode_cachep)
                 return -ENOMEM;
-        register_filesystem(&rpc_pipe_fs_type);
+        err = register_filesystem(&rpc_pipe_fs_type);
+        if (err) {
+                kmem_cache_destroy(rpc_inode_cachep);
+                return err;
+        }
+
         return 0;
 }
 
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 43ecf62f12ef..0d35bc796d00 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -146,9 +146,11 @@ init_sunrpc(void)
         int err = register_rpc_pipefs();
         if (err)
                 goto out;
-        err = rpc_init_mempool() != 0;
-        if (err)
+        err = rpc_init_mempool();
+        if (err) {
+                unregister_rpc_pipefs();
                 goto out;
+        }
 #ifdef RPC_DEBUG
         rpc_register_sysctl();
 #endif