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>

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index ad39b47..a2f1893 100644 (file)
--- 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 43ecf62..0d35bc7 100644 (file)
--- 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