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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-02-07 16:22:56 -0800 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-05-15 14:59:26 -0700 |
| commit | f04c6ce2cfaff4b982a6c8ad37e07c14379c111c (patch) | |
| tree | f942286f4d8af718236b73f91cc053e92c424266 /fs/devpts | |
| parent | ebc887b278944fc478ab31a4be8ba0cae5fe4f48 (diff) | |
| download | lwn-f04c6ce2cfaff4b982a6c8ad37e07c14379c111c.tar.gz lwn-f04c6ce2cfaff4b982a6c8ad37e07c14379c111c.zip | |
userns: Convert devpts to use kuid/kgid where appropriate
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'fs/devpts')
| -rw-r--r-- | fs/devpts/inode.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c index 10f5e0b484db..979c1e309c73 100644 --- a/fs/devpts/inode.c +++ b/fs/devpts/inode.c @@ -98,8 +98,8 @@ static struct vfsmount *devpts_mnt; struct pts_mount_opts { int setuid; int setgid; - uid_t uid; - gid_t gid; + kuid_t uid; + kgid_t gid; umode_t mode; umode_t ptmxmode; int newinstance; @@ -158,11 +158,13 @@ static inline struct super_block *pts_sb_from_inode(struct inode *inode) static int parse_mount_options(char *data, int op, struct pts_mount_opts *opts) { char *p; + kuid_t uid; + kgid_t gid; opts->setuid = 0; opts->setgid = 0; - opts->uid = 0; - opts->gid = 0; + opts->uid = GLOBAL_ROOT_UID; + opts->gid = GLOBAL_ROOT_GID; opts->mode = DEVPTS_DEFAULT_MODE; opts->ptmxmode = DEVPTS_DEFAULT_PTMX_MODE; opts->max = NR_UNIX98_PTY_MAX; @@ -184,13 +186,19 @@ static int parse_mount_options(char *data, int op, struct pts_mount_opts *opts) case Opt_uid: if (match_int(&args[0], &option)) return -EINVAL; - opts->uid = option; + uid = make_kuid(current_user_ns(), option); + if (!uid_valid(uid)) + return -EINVAL; + opts->uid = uid; opts->setuid = 1; break; case Opt_gid: if (match_int(&args[0], &option)) return -EINVAL; - opts->gid = option; + gid = make_kgid(current_user_ns(), option); + if (!gid_valid(gid)) + return -EINVAL; + opts->gid = gid; opts->setgid = 1; break; case Opt_mode: @@ -315,9 +323,9 @@ static int devpts_show_options(struct seq_file *seq, struct dentry *root) struct pts_mount_opts *opts = &fsi->mount_opts; if (opts->setuid) - seq_printf(seq, ",uid=%u", opts->uid); + seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, opts->uid)); if (opts->setgid) - seq_printf(seq, ",gid=%u", opts->gid); + seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, opts->gid)); seq_printf(seq, ",mode=%03o", opts->mode); #ifdef CONFIG_DEVPTS_MULTIPLE_INSTANCES seq_printf(seq, ",ptmxmode=%03o", opts->ptmxmode); |