From d2b31ca644fdc8704de3367a6a56a5c958c77f53 Mon Sep 17 00:00:00 2001 From: Eric W. Biederman Date: Fri, 1 Jun 2012 16:14:19 -0600 Subject: userns: Teach security_path_chown to take kuids and kgids Don't make the security modules deal with raw user space uid and gids instead pass in a kuid_t and a kgid_t so that security modules only have to deal with internal kernel uids and gids. Cc: Al Viro Cc: James Morris Cc: John Johansen Cc: Kentaro Takeda Cc: Tetsuo Handa Acked-by: Serge Hallyn Signed-off-by: Eric W. Biederman --- security/apparmor/lsm.c | 2 +- security/capability.c | 2 +- security/security.c | 2 +- security/tomoyo/tomoyo.c | 12 +++++++----- 4 files changed, 10 insertions(+), 8 deletions(-) (limited to 'security') diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index 8ea39aabe948..8c2a7f6b35e2 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -352,7 +352,7 @@ static int apparmor_path_chmod(struct path *path, umode_t mode) return common_perm_mnt_dentry(OP_CHMOD, path->mnt, path->dentry, AA_MAY_CHMOD); } -static int apparmor_path_chown(struct path *path, uid_t uid, gid_t gid) +static int apparmor_path_chown(struct path *path, kuid_t uid, kgid_t gid) { struct path_cond cond = { path->dentry->d_inode->i_uid, path->dentry->d_inode->i_mode diff --git a/security/capability.c b/security/capability.c index 61095df8b89a..a40aac677c72 100644 --- a/security/capability.c +++ b/security/capability.c @@ -284,7 +284,7 @@ static int cap_path_chmod(struct path *path, umode_t mode) return 0; } -static int cap_path_chown(struct path *path, uid_t uid, gid_t gid) +static int cap_path_chown(struct path *path, kuid_t uid, kgid_t gid) { return 0; } diff --git a/security/security.c b/security/security.c index 860aeb349cb3..f9a2f2ef2454 100644 --- a/security/security.c +++ b/security/security.c @@ -434,7 +434,7 @@ int security_path_chmod(struct path *path, umode_t mode) return security_ops->path_chmod(path, mode); } -int security_path_chown(struct path *path, uid_t uid, gid_t gid) +int security_path_chown(struct path *path, kuid_t uid, kgid_t gid) { if (unlikely(IS_PRIVATE(path->dentry->d_inode))) return 0; diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c index c2d04a50f76a..d88eb3a046ed 100644 --- a/security/tomoyo/tomoyo.c +++ b/security/tomoyo/tomoyo.c @@ -373,13 +373,15 @@ static int tomoyo_path_chmod(struct path *path, umode_t mode) * * Returns 0 on success, negative value otherwise. */ -static int tomoyo_path_chown(struct path *path, uid_t uid, gid_t gid) +static int tomoyo_path_chown(struct path *path, kuid_t uid, kgid_t gid) { int error = 0; - if (uid != (uid_t) -1) - error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path, uid); - if (!error && gid != (gid_t) -1) - error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path, gid); + if (uid_valid(uid)) + error = tomoyo_path_number_perm(TOMOYO_TYPE_CHOWN, path, + from_kuid(&init_user_ns, uid)); + if (!error && gid_valid(gid)) + error = tomoyo_path_number_perm(TOMOYO_TYPE_CHGRP, path, + from_kgid(&init_user_ns, gid)); return error; } -- cgit v1.2.3