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authorEric W. Biederman <ebiederm@xmission.com>2012-02-07 18:51:01 -0800
committerEric W. Biederman <ebiederm@xmission.com>2012-05-03 03:28:41 -0700
commita29c33f4e506e1dae7e0985b6328046535becbf8 (patch)
tree529720b8aefaf115b4be197e5d7628657cf5b4bc /kernel/uid16.c
parent18815a18085364d8514c0d0c4c986776cb74272c (diff)
downloadvexpress-lsk-a29c33f4e506e1dae7e0985b6328046535becbf8.tar.gz
userns: Convert setting and getting uid and gid system calls to use kuid and kgid
Convert setregid, setgid, setreuid, setuid, setresuid, getresuid, setresgid, getresgid, setfsuid, setfsgid, getuid, geteuid, getgid, getegid, waitpid, waitid, wait4. Convert userspace uids and gids into kuids and kgids before being placed on struct cred. Convert struct cred kuids and kgids into userspace uids and gids when returning them. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'kernel/uid16.c')
-rw-r--r--kernel/uid16.c34
1 files changed, 22 insertions, 12 deletions
diff --git a/kernel/uid16.c b/kernel/uid16.c
index e530bc34c4c..d7948eb1022 100644
--- a/kernel/uid16.c
+++ b/kernel/uid16.c
@@ -81,14 +81,19 @@ SYSCALL_DEFINE3(setresuid16, old_uid_t, ruid, old_uid_t, euid, old_uid_t, suid)
return ret;
}
-SYSCALL_DEFINE3(getresuid16, old_uid_t __user *, ruid, old_uid_t __user *, euid, old_uid_t __user *, suid)
+SYSCALL_DEFINE3(getresuid16, old_uid_t __user *, ruidp, old_uid_t __user *, euidp, old_uid_t __user *, suidp)
{
const struct cred *cred = current_cred();
int retval;
+ old_uid_t ruid, euid, suid;
- if (!(retval = put_user(high2lowuid(cred->uid), ruid)) &&
- !(retval = put_user(high2lowuid(cred->euid), euid)))
- retval = put_user(high2lowuid(cred->suid), suid);
+ ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid));
+ euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid));
+ suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid));
+
+ if (!(retval = put_user(ruid, ruidp)) &&
+ !(retval = put_user(euid, euidp)))
+ retval = put_user(suid, suidp);
return retval;
}
@@ -103,14 +108,19 @@ SYSCALL_DEFINE3(setresgid16, old_gid_t, rgid, old_gid_t, egid, old_gid_t, sgid)
}
-SYSCALL_DEFINE3(getresgid16, old_gid_t __user *, rgid, old_gid_t __user *, egid, old_gid_t __user *, sgid)
+SYSCALL_DEFINE3(getresgid16, old_gid_t __user *, rgidp, old_gid_t __user *, egidp, old_gid_t __user *, sgidp)
{
const struct cred *cred = current_cred();
int retval;
+ old_gid_t rgid, egid, sgid;
+
+ rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid));
+ egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid));
+ sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid));
- if (!(retval = put_user(high2lowgid(cred->gid), rgid)) &&
- !(retval = put_user(high2lowgid(cred->egid), egid)))
- retval = put_user(high2lowgid(cred->sgid), sgid);
+ if (!(retval = put_user(rgid, rgidp)) &&
+ !(retval = put_user(egid, egidp)))
+ retval = put_user(sgid, sgidp);
return retval;
}
@@ -221,20 +231,20 @@ SYSCALL_DEFINE2(setgroups16, int, gidsetsize, old_gid_t __user *, grouplist)
SYSCALL_DEFINE0(getuid16)
{
- return high2lowuid(current_uid());
+ return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
}
SYSCALL_DEFINE0(geteuid16)
{
- return high2lowuid(current_euid());
+ return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
}
SYSCALL_DEFINE0(getgid16)
{
- return high2lowgid(current_gid());
+ return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
}
SYSCALL_DEFINE0(getegid16)
{
- return high2lowgid(current_egid());
+ return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
}