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userns: Convert user specfied uids and gids in chown into kuids and kgid

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Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-03-03 19:52:01 -08:00
parent 8e96e3b7b8
commit 52137abe18
1 changed files with 11 additions and 2 deletions
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13
fs/open.c
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@ -506,15 +506,24 @@ static int chown_common(struct path *path, uid_t user, gid_t group)
struct inode *inode = path->dentry->d_inode; struct inode *inode = path->dentry->d_inode;
int error; int error;
struct iattr newattrs; struct iattr newattrs;
kuid_t uid;
kgid_t gid;
uid = make_kuid(current_user_ns(), user);
gid = make_kgid(current_user_ns(), group);
newattrs.ia_valid = ATTR_CTIME; newattrs.ia_valid = ATTR_CTIME;
if (user != (uid_t) -1) { if (user != (uid_t) -1) {
if (!uid_valid(uid))
return -EINVAL;
newattrs.ia_valid |= ATTR_UID; newattrs.ia_valid |= ATTR_UID;
newattrs.ia_uid = user; newattrs.ia_uid = uid;
} }
if (group != (gid_t) -1) { if (group != (gid_t) -1) {
if (!gid_valid(gid))
return -EINVAL;
newattrs.ia_valid |= ATTR_GID; newattrs.ia_valid |= ATTR_GID;
newattrs.ia_gid = group; newattrs.ia_gid = gid;
} }
if (!S_ISDIR(inode->i_mode)) if (!S_ISDIR(inode->i_mode))
newattrs.ia_valid |= newattrs.ia_valid |=