[PATCH] ncpfs: ensure we free wdog_pid on parse_option or fill_inode failure
Eric W. Biederman [Wed, 13 Dec 2006 08:35:13 +0000 (00:35 -0800)]
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>

fs/ncpfs/inode.c

index 861d950..67a90bf 100644 (file)
@@ -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;