From: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> Cc: Petr Vandrovec <petr@xxxxxxxxxxxxxx> Acked-by: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx> Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx> --- fs/ncpfs/inode.c | 55 ++++++++++++++++++++++++++++++-------------------- fs/ncpfs/ioctl.c | 25 ++++++++++++---------- fs/ncpfs/ncp_fs_sb.h | 6 ++-- init/Kconfig | 1 - 4 files changed, 50 insertions(+), 37 deletions(-) diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c index d7e9fe7..3dd2cfd 100644 --- a/fs/ncpfs/inode.c +++ b/fs/ncpfs/inode.c @@ -331,12 +331,15 @@ static int ncp_show_options(struct seq_file *seq, struct dentry *root) struct ncp_server *server = NCP_SBP(root->d_sb); unsigned int tmp; - if (server->m.uid != 0) - seq_printf(seq, ",uid=%u", server->m.uid); - if (server->m.gid != 0) - seq_printf(seq, ",gid=%u", server->m.gid); - if (server->m.mounted_uid != 0) - seq_printf(seq, ",owner=%u", server->m.mounted_uid); + if (!uid_eq(server->m.uid, GLOBAL_ROOT_UID)) + seq_printf(seq, ",uid=%u", + from_kuid_munged(&init_user_ns, server->m.uid)); + if (!gid_eq(server->m.gid, GLOBAL_ROOT_GID)) + seq_printf(seq, ",gid=%u", + from_kgid_munged(&init_user_ns, server->m.gid)); + if (!uid_eq(server->m.mounted_uid, GLOBAL_ROOT_UID)) + seq_printf(seq, ",owner=%u", + from_kuid_munged(&init_user_ns, server->m.mounted_uid)); tmp = server->m.file_mode & S_IALLUGO; if (tmp != NCP_DEFAULT_FILE_MODE) seq_printf(seq, ",mode=0%o", tmp); @@ -381,13 +384,13 @@ static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options) data->flags = 0; data->int_flags = 0; - data->mounted_uid = 0; + data->mounted_uid = GLOBAL_ROOT_UID; data->wdog_pid = NULL; data->ncp_fd = ~0; data->time_out = NCP_DEFAULT_TIME_OUT; data->retry_count = NCP_DEFAULT_RETRY_COUNT; - data->uid = 0; - data->gid = 0; + data->uid = GLOBAL_ROOT_UID; + data->gid = GLOBAL_ROOT_GID; data->file_mode = NCP_DEFAULT_FILE_MODE; data->dir_mode = NCP_DEFAULT_DIR_MODE; data->info_fd = -1; @@ -399,13 +402,19 @@ static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options) goto err; switch (optval) { case 'u': - data->uid = optint; + data->uid = make_kuid(current_user_ns(), optint); + if (!uid_valid(data->uid)) + goto err; break; case 'g': - data->gid = optint; + data->gid = make_kgid(current_user_ns(), optint); + if (!gid_valid(data->gid)) + goto err; break; case 'o': - data->mounted_uid = optint; + data->mounted_uid = make_kuid(current_user_ns(), optint); + if (!uid_valid(data->mounted_uid)) + goto err; break; case 'm': data->file_mode = optint; @@ -480,13 +489,13 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) data.flags = md->flags; data.int_flags = NCP_IMOUNT_LOGGEDIN_POSSIBLE; - data.mounted_uid = md->mounted_uid; + data.mounted_uid = make_kuid(current_user_ns(), md->mounted_uid); data.wdog_pid = find_get_pid(md->wdog_pid); data.ncp_fd = md->ncp_fd; data.time_out = md->time_out; data.retry_count = md->retry_count; - data.uid = md->uid; - data.gid = md->gid; + data.uid = make_kuid(current_user_ns(), md->uid); + data.gid = make_kgid(current_user_ns(), md->gid); data.file_mode = md->file_mode; data.dir_mode = md->dir_mode; data.info_fd = -1; @@ -499,13 +508,13 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) struct ncp_mount_data_v4* md = (struct ncp_mount_data_v4*)raw_data; data.flags = md->flags; - data.mounted_uid = md->mounted_uid; + data.mounted_uid = make_kuid(current_user_ns(), md->mounted_uid); data.wdog_pid = find_get_pid(md->wdog_pid); data.ncp_fd = md->ncp_fd; data.time_out = md->time_out; data.retry_count = md->retry_count; - data.uid = md->uid; - data.gid = md->gid; + data.uid = make_kuid(current_user_ns(), md->uid); + data.gid = make_kgid(current_user_ns(), md->gid); data.file_mode = md->file_mode; data.dir_mode = md->dir_mode; data.info_fd = -1; @@ -520,6 +529,10 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) goto out; break; } + error = -EINVAL; + if (!uid_valid(data.mounted_uid) || !uid_valid(data.uid) || + !gid_valid(data.gid)) + goto out; error = -EBADF; ncp_filp = fget(data.ncp_fd); if (!ncp_filp) @@ -886,12 +899,10 @@ int ncp_notify_change(struct dentry *dentry, struct iattr *attr) goto out; result = -EPERM; - if (((attr->ia_valid & ATTR_UID) && - (attr->ia_uid != server->m.uid))) + if ((attr->ia_valid & ATTR_UID) && !uid_eq(attr->ia_uid, server->m.uid)) goto out; - if (((attr->ia_valid & ATTR_GID) && - (attr->ia_gid != server->m.gid))) + if ((attr->ia_valid & ATTR_GID) && !gid_eq(attr->ia_gid, server->m.gid)) goto out; if (((attr->ia_valid & ATTR_MODE) && diff --git a/fs/ncpfs/ioctl.c b/fs/ncpfs/ioctl.c index 6958adf..d44318d 100644 --- a/fs/ncpfs/ioctl.c +++ b/fs/ncpfs/ioctl.c @@ -45,7 +45,7 @@ ncp_get_fs_info(struct ncp_server * server, struct inode *inode, return -EINVAL; } /* TODO: info.addr = server->m.serv_addr; */ - SET_UID(info.mounted_uid, server->m.mounted_uid); + SET_UID(info.mounted_uid, from_kuid_munged(current_user_ns(), server->m.mounted_uid)); info.connection = server->connection; info.buffer_size = server->buffer_size; info.volume_number = NCP_FINFO(inode)->volNumber; @@ -69,7 +69,7 @@ ncp_get_fs_info_v2(struct ncp_server * server, struct inode *inode, DPRINTK("info.version invalid: %d\n", info2.version); return -EINVAL; } - info2.mounted_uid = server->m.mounted_uid; + info2.mounted_uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid); info2.connection = server->connection; info2.buffer_size = server->buffer_size; info2.volume_number = NCP_FINFO(inode)->volNumber; @@ -135,7 +135,7 @@ ncp_get_compat_fs_info_v2(struct ncp_server * server, struct inode *inode, DPRINTK("info.version invalid: %d\n", info2.version); return -EINVAL; } - info2.mounted_uid = server->m.mounted_uid; + info2.mounted_uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid); info2.connection = server->connection; info2.buffer_size = server->buffer_size; info2.volume_number = NCP_FINFO(inode)->volNumber; @@ -348,22 +348,25 @@ static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg { u16 uid; - SET_UID(uid, server->m.mounted_uid); + SET_UID(uid, from_kuid_munged(current_user_ns(), server->m.mounted_uid)); if (put_user(uid, (u16 __user *)argp)) return -EFAULT; return 0; } case NCP_IOC_GETMOUNTUID32: - if (put_user(server->m.mounted_uid, - (u32 __user *)argp)) + { + uid_t uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid); + if (put_user(uid, (u32 __user *)argp)) return -EFAULT; return 0; + } case NCP_IOC_GETMOUNTUID64: - if (put_user(server->m.mounted_uid, - (u64 __user *)argp)) + { + uid_t uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid); + if (put_user(uid, (u64 __user *)argp)) return -EFAULT; return 0; - + } case NCP_IOC_GETROOT: { struct ncp_setroot_ioctl sr; @@ -810,7 +813,7 @@ long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct inode *inode = filp->f_dentry->d_inode; struct ncp_server *server = NCP_SERVER(inode); - uid_t uid = current_uid(); + kuid_t uid = current_uid(); int need_drop_write = 0; long ret; @@ -824,7 +827,7 @@ long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } break; } - if (server->m.mounted_uid != uid) { + if (!uid_eq(server->m.mounted_uid, uid)) { switch (cmd) { /* * Only mount owner can issue these ioctls. Information diff --git a/fs/ncpfs/ncp_fs_sb.h b/fs/ncpfs/ncp_fs_sb.h index 54cc0cd..c51b2c5 100644 --- a/fs/ncpfs/ncp_fs_sb.h +++ b/fs/ncpfs/ncp_fs_sb.h @@ -23,15 +23,15 @@ struct ncp_mount_data_kernel { unsigned long flags; /* NCP_MOUNT_* flags */ unsigned int int_flags; /* internal flags */ #define NCP_IMOUNT_LOGGEDIN_POSSIBLE 0x0001 - uid_t mounted_uid; /* Who may umount() this filesystem? */ + kuid_t mounted_uid; /* Who may umount() this filesystem? */ struct pid *wdog_pid; /* Who cares for our watchdog packets? */ unsigned int ncp_fd; /* The socket to the ncp port */ unsigned int time_out; /* How long should I wait after sending a NCP request? */ unsigned int retry_count; /* And how often should I retry? */ unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; - uid_t uid; - gid_t gid; + kuid_t uid; + kgid_t gid; umode_t file_mode; umode_t dir_mode; int info_fd; diff --git a/init/Kconfig b/init/Kconfig index 53b61cd..433e6e0 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -999,7 +999,6 @@ config UIDGID_CONVERTED default y # Filesystems - depends on NCP_FS = n depends on NFSD = n depends on NFS_FS = n depends on OCFS2_FS = n -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html