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-rw-r--r--fs/fuse/dev.c4
-rw-r--r--fs/fuse/dir.c20
-rw-r--r--fs/fuse/fuse_i.h4
-rw-r--r--fs/fuse/inode.c23
4 files changed, 28 insertions, 23 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 8c23fa7..c163353 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -92,8 +92,8 @@ static void __fuse_put_request(struct fuse_req *req)
static void fuse_req_init_context(struct fuse_req *req)
{
- req->in.h.uid = current_fsuid();
- req->in.h.gid = current_fsgid();
+ req->in.h.uid = from_kuid_munged(&init_user_ns, current_fsuid());
+ req->in.h.gid = from_kgid_munged(&init_user_ns, current_fsgid());
req->in.h.pid = current->pid;
}
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 324bc08..b7c09f9 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -818,8 +818,8 @@ static void fuse_fillattr(struct inode *inode, struct fuse_attr *attr,
stat->ino = attr->ino;
stat->mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
stat->nlink = attr->nlink;
- stat->uid = attr->uid;
- stat->gid = attr->gid;
+ stat->uid = make_kuid(&init_user_ns, attr->uid);
+ stat->gid = make_kgid(&init_user_ns, attr->gid);
stat->rdev = inode->i_rdev;
stat->atime.tv_sec = attr->atime;
stat->atime.tv_nsec = attr->atimensec;
@@ -1007,12 +1007,12 @@ int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
rcu_read_lock();
ret = 0;
cred = __task_cred(task);
- if (cred->euid == fc->user_id &&
- cred->suid == fc->user_id &&
- cred->uid == fc->user_id &&
- cred->egid == fc->group_id &&
- cred->sgid == fc->group_id &&
- cred->gid == fc->group_id)
+ if (uid_eq(cred->euid, fc->user_id) &&
+ uid_eq(cred->suid, fc->user_id) &&
+ uid_eq(cred->uid, fc->user_id) &&
+ gid_eq(cred->egid, fc->group_id) &&
+ gid_eq(cred->sgid, fc->group_id) &&
+ gid_eq(cred->gid, fc->group_id))
ret = 1;
rcu_read_unlock();
@@ -1306,9 +1306,9 @@ static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
if (ivalid & ATTR_MODE)
arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode;
if (ivalid & ATTR_UID)
- arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid;
+ arg->valid |= FATTR_UID, arg->uid = from_kuid(&init_user_ns, iattr->ia_uid);
if (ivalid & ATTR_GID)
- arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid;
+ arg->valid |= FATTR_GID, arg->gid = from_kgid(&init_user_ns, iattr->ia_gid);
if (ivalid & ATTR_SIZE)
arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
if (ivalid & ATTR_ATIME) {
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index e24dd74..e105a53 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -333,10 +333,10 @@ struct fuse_conn {
atomic_t count;
/** The user id for this mount */
- uid_t user_id;
+ kuid_t user_id;
/** The group id for this mount */
- gid_t group_id;
+ kgid_t group_id;
/** The fuse mount flags for this mount */
unsigned flags;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index f0eda12..73ca6b7 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -60,8 +60,8 @@ MODULE_PARM_DESC(max_user_congthresh,
struct fuse_mount_data {
int fd;
unsigned rootmode;
- unsigned user_id;
- unsigned group_id;
+ kuid_t user_id;
+ kgid_t group_id;
unsigned fd_present:1;
unsigned rootmode_present:1;
unsigned user_id_present:1;
@@ -164,8 +164,8 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
inode->i_ino = fuse_squash_ino(attr->ino);
inode->i_mode = (inode->i_mode & S_IFMT) | (attr->mode & 07777);
set_nlink(inode, attr->nlink);
- inode->i_uid = attr->uid;
- inode->i_gid = attr->gid;
+ inode->i_uid = make_kuid(&init_user_ns, attr->uid);
+ inode->i_gid = make_kgid(&init_user_ns, attr->gid);
inode->i_blocks = attr->blocks;
inode->i_atime.tv_sec = attr->atime;
inode->i_atime.tv_nsec = attr->atimensec;
@@ -492,14 +492,18 @@ static int parse_fuse_opt(char *opt, struct fuse_mount_data *d, int is_bdev)
case OPT_USER_ID:
if (match_int(&args[0], &value))
return 0;
- d->user_id = value;
+ d->user_id = make_kuid(current_user_ns(), value);
+ if (!uid_valid(d->user_id))
+ return 0;
d->user_id_present = 1;
break;
case OPT_GROUP_ID:
if (match_int(&args[0], &value))
return 0;
- d->group_id = value;
+ d->group_id = make_kgid(current_user_ns(), value);
+ if (!gid_valid(d->group_id))
+ return 0;
d->group_id_present = 1;
break;
@@ -540,8 +544,8 @@ static int fuse_show_options(struct seq_file *m, struct dentry *root)
struct super_block *sb = root->d_sb;
struct fuse_conn *fc = get_fuse_conn_super(sb);
- seq_printf(m, ",user_id=%u", fc->user_id);
- seq_printf(m, ",group_id=%u", fc->group_id);
+ seq_printf(m, ",user_id=%u", from_kuid_munged(&init_user_ns, fc->user_id));
+ seq_printf(m, ",group_id=%u", from_kgid_munged(&init_user_ns, fc->group_id));
if (fc->flags & FUSE_DEFAULT_PERMISSIONS)
seq_puts(m, ",default_permissions");
if (fc->flags & FUSE_ALLOW_OTHER)
@@ -989,7 +993,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
if (!file)
goto err;
- if (file->f_op != &fuse_dev_operations)
+ if ((file->f_op != &fuse_dev_operations) ||
+ (file->f_cred->user_ns != &init_user_ns))
goto err_fput;
fc = kmalloc(sizeof(*fc), GFP_KERNEL);
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