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authorEric W. Biederman <ebiederm@xmission.com>2012-04-03 14:01:31 -0700
committerEric W. Biederman <ebiederm@xmission.com>2012-09-06 19:02:52 -0700
commit7dc05881b64792e0ea41293e9595cc962a716225 (patch)
treea54ad7a79474118c4a202a106b42c4d8b1e3bbe4 /fs/debugfs
parentc9235f4872e810d43bf1b19b92cdbe0ec282bada (diff)
userns: Convert debugfs to use kuid/kgid where appropriate.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'fs/debugfs')
-rw-r--r--fs/debugfs/inode.c26
1 files changed, 18 insertions, 8 deletions
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 4733eab34a2..36e2b667e82 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -128,8 +128,8 @@ static inline int debugfs_positive(struct dentry *dentry)
}
struct debugfs_mount_opts {
- uid_t uid;
- gid_t gid;
+ kuid_t uid;
+ kgid_t gid;
umode_t mode;
};
@@ -156,6 +156,8 @@ static int debugfs_parse_options(char *data, struct debugfs_mount_opts *opts)
substring_t args[MAX_OPT_ARGS];
int option;
int token;
+ kuid_t uid;
+ kgid_t gid;
char *p;
opts->mode = DEBUGFS_DEFAULT_MODE;
@@ -169,12 +171,18 @@ static int debugfs_parse_options(char *data, struct debugfs_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;
break;
case Opt_gid:
if (match_octal(&args[0], &option))
return -EINVAL;
- opts->gid = option;
+ gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(gid))
+ return -EINVAL;
+ opts->gid = gid;
break;
case Opt_mode:
if (match_octal(&args[0], &option))
@@ -226,10 +234,12 @@ static int debugfs_show_options(struct seq_file *m, struct dentry *root)
struct debugfs_fs_info *fsi = root->d_sb->s_fs_info;
struct debugfs_mount_opts *opts = &fsi->mount_opts;
- if (opts->uid != 0)
- seq_printf(m, ",uid=%u", opts->uid);
- if (opts->gid != 0)
- seq_printf(m, ",gid=%u", opts->gid);
+ if (!uid_eq(opts->uid, GLOBAL_ROOT_UID))
+ seq_printf(m, ",uid=%u",
+ from_kuid_munged(&init_user_ns, opts->uid));
+ if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
+ seq_printf(m, ",gid=%u",
+ from_kgid_munged(&init_user_ns, opts->gid));
if (opts->mode != DEBUGFS_DEFAULT_MODE)
seq_printf(m, ",mode=%o", opts->mode);