[PATCH] ncpfs: ensure we free wdog_pid on parse_option or fill_inode failure

This took a little refactoring but now errors are handled cleanly.  When
this code used pid_t values this wasn't necessary because you can't
leak a pid_t.

Thanks to Peter Vandrovec for spotting this.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Peter Vandrovec <vandrove@vc.cvut.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 8 deletions

diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index 861d950ac99..67a90bf795d 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -327,6 +327,7 @@ static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options)
         char *optarg;
         unsigned long optint;
         int version = 0;
+        int ret;
 
         data->flags = 0;
         data->int_flags = 0;
@@ -343,8 +344,9 @@ static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options)
         data->mounted_vol[0] = 0;
         
         while ((optval = ncp_getopt("ncpfs", &options, ncp_opts, NULL, &optarg, &optint)) != 0) {
-                if (optval < 0)
-                        return optval;
+                ret = optval;
+                if (ret < 0)
+                        goto err;
                 switch (optval) {
                         case 'u':
                                 data->uid = optint;
@@ -380,18 +382,21 @@ static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options)
                                 data->info_fd = optint;
                                 break;
                         case 'v':
-                                if (optint < NCP_MOUNT_VERSION_V4) {
-                                        return -ECHRNG;
-                                }
-                                if (optint > NCP_MOUNT_VERSION_V5) {
-                                        return -ECHRNG;
-                                }
+                                ret = -ECHRNG;
+                                if (optint < NCP_MOUNT_VERSION_V4)
+                                        goto err;
+                                if (optint > NCP_MOUNT_VERSION_V5)
+                                        goto err;
                                 version = optint;
                                 break;
                         
                 }
         }
         return 0;
+err:
+        put_pid(data->wdog_pid);
+        data->wdog_pid = NULL;
+        return ret;
 }
 
 static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
@@ -409,6 +414,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
 #endif
         struct ncp_entry_info finfo;
 
+        data.wdog_pid = NULL;
         server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
         if (!server)
                 return -ENOMEM;
@@ -679,6 +685,7 @@ out_fput:
          */
         fput(ncp_filp);
 out:
+        put_pid(data.wdog_pid);
         sb->s_fs_info = NULL;
         kfree(server);
         return error;