From 1de241268d7b6bea05d64f9269bf9aa90be49ff1 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 13 Dec 2006 00:35:13 -0800 Subject: [PATCH] [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 Cc: Peter Vandrovec Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ncpfs/inode.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c index 861d950ac99a..67a90bf795d5 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 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) */ fput(ncp_filp); out: + put_pid(data.wdog_pid); sb->s_fs_info = NULL; kfree(server); return error; -- GitLab