2005-04-16 16:20:36 -06:00
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/*
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* Wrapper functions for 16bit uid back compatibility. All nicely tied
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* together in the faint hope we can take the out in five years time.
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*/
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#include <linux/mm.h>
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#include <linux/mman.h>
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#include <linux/notifier.h>
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#include <linux/reboot.h>
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#include <linux/prctl.h>
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2006-01-11 13:17:46 -07:00
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#include <linux/capability.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/init.h>
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#include <linux/highuid.h>
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#include <linux/security.h>
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#include <linux/syscalls.h>
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#include <asm/uaccess.h>
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2009-01-14 06:14:19 -07:00
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SYSCALL_DEFINE3(chown16, const char __user *, filename, old_uid_t, user, old_gid_t, group)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_chown(filename, low2highuid(user), low2highgid(group));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:19 -07:00
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SYSCALL_DEFINE3(lchown16, const char __user *, filename, old_uid_t, user, old_gid_t, group)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_lchown(filename, low2highuid(user), low2highgid(group));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:19 -07:00
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SYSCALL_DEFINE3(fchown16, unsigned int, fd, old_uid_t, user, old_gid_t, group)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_fchown(fd, low2highuid(user), low2highgid(group));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:20 -07:00
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SYSCALL_DEFINE2(setregid16, old_gid_t, rgid, old_gid_t, egid)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_setregid(low2highgid(rgid), low2highgid(egid));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:20 -07:00
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SYSCALL_DEFINE1(setgid16, old_gid_t, gid)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_setgid(low2highgid(gid));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:20 -07:00
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SYSCALL_DEFINE2(setreuid16, old_uid_t, ruid, old_uid_t, euid)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_setreuid(low2highuid(ruid), low2highuid(euid));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:20 -07:00
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SYSCALL_DEFINE1(setuid16, old_uid_t, uid)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_setuid(low2highuid(uid));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:20 -07:00
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SYSCALL_DEFINE3(setresuid16, old_uid_t, ruid, old_uid_t, euid, old_uid_t, suid)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_setresuid(low2highuid(ruid), low2highuid(euid),
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2006-04-19 15:41:39 -06:00
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low2highuid(suid));
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2005-04-16 16:20:36 -06:00
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}
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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>
2012-02-07 19:51:01 -07:00
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SYSCALL_DEFINE3(getresuid16, old_uid_t __user *, ruidp, old_uid_t __user *, euidp, old_uid_t __user *, suidp)
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2005-04-16 16:20:36 -06:00
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{
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2008-11-13 16:39:18 -07:00
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const struct cred *cred = current_cred();
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2005-04-16 16:20:36 -06:00
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int retval;
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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>
2012-02-07 19:51:01 -07:00
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old_uid_t ruid, euid, suid;
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2005-04-16 16:20:36 -06:00
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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>
2012-02-07 19:51:01 -07:00
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ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid));
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euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid));
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suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid));
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if (!(retval = put_user(ruid, ruidp)) &&
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!(retval = put_user(euid, euidp)))
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retval = put_user(suid, suidp);
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2005-04-16 16:20:36 -06:00
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return retval;
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}
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2009-01-14 06:14:20 -07:00
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SYSCALL_DEFINE3(setresgid16, old_gid_t, rgid, old_gid_t, egid, old_gid_t, sgid)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_setresgid(low2highgid(rgid), low2highgid(egid),
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2006-04-19 15:41:39 -06:00
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low2highgid(sgid));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:20 -07:00
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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>
2012-02-07 19:51:01 -07:00
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SYSCALL_DEFINE3(getresgid16, old_gid_t __user *, rgidp, old_gid_t __user *, egidp, old_gid_t __user *, sgidp)
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2005-04-16 16:20:36 -06:00
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{
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2008-11-13 16:39:18 -07:00
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const struct cred *cred = current_cred();
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2005-04-16 16:20:36 -06:00
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int retval;
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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>
2012-02-07 19:51:01 -07:00
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old_gid_t rgid, egid, sgid;
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rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid));
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egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid));
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sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid));
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2005-04-16 16:20:36 -06:00
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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>
2012-02-07 19:51:01 -07:00
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if (!(retval = put_user(rgid, rgidp)) &&
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!(retval = put_user(egid, egidp)))
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retval = put_user(sgid, sgidp);
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2005-04-16 16:20:36 -06:00
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return retval;
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}
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2009-01-14 06:14:20 -07:00
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SYSCALL_DEFINE1(setfsuid16, old_uid_t, uid)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_setfsuid(low2highuid(uid));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:20 -07:00
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SYSCALL_DEFINE1(setfsgid16, old_gid_t, gid)
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2005-04-16 16:20:36 -06:00
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{
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2013-01-21 13:25:54 -07:00
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return sys_setfsgid(low2highgid(gid));
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2005-04-16 16:20:36 -06:00
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}
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static int groups16_to_user(old_gid_t __user *grouplist,
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struct group_info *group_info)
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{
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2011-11-14 16:56:38 -07:00
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struct user_namespace *user_ns = current_user_ns();
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2005-04-16 16:20:36 -06:00
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int i;
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old_gid_t group;
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2011-11-14 16:56:38 -07:00
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kgid_t kgid;
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2005-04-16 16:20:36 -06:00
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for (i = 0; i < group_info->ngroups; i++) {
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2011-11-14 16:56:38 -07:00
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kgid = GROUP_AT(group_info, i);
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group = high2lowgid(from_kgid_munged(user_ns, kgid));
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2005-04-16 16:20:36 -06:00
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if (put_user(group, grouplist+i))
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return -EFAULT;
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}
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return 0;
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}
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static int groups16_from_user(struct group_info *group_info,
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old_gid_t __user *grouplist)
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{
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2011-11-14 16:56:38 -07:00
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struct user_namespace *user_ns = current_user_ns();
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2005-04-16 16:20:36 -06:00
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int i;
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old_gid_t group;
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2011-11-14 16:56:38 -07:00
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kgid_t kgid;
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2005-04-16 16:20:36 -06:00
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for (i = 0; i < group_info->ngroups; i++) {
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if (get_user(group, grouplist+i))
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return -EFAULT;
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2011-11-14 16:56:38 -07:00
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kgid = make_kgid(user_ns, low2highgid(group));
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if (!gid_valid(kgid))
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return -EINVAL;
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GROUP_AT(group_info, i) = kgid;
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2005-04-16 16:20:36 -06:00
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}
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return 0;
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}
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2009-01-14 06:14:21 -07:00
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SYSCALL_DEFINE2(getgroups16, int, gidsetsize, old_gid_t __user *, grouplist)
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2005-04-16 16:20:36 -06:00
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{
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2008-11-13 16:39:18 -07:00
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const struct cred *cred = current_cred();
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int i;
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2005-04-16 16:20:36 -06:00
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if (gidsetsize < 0)
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return -EINVAL;
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2008-11-13 16:39:18 -07:00
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i = cred->group_info->ngroups;
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2005-04-16 16:20:36 -06:00
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if (gidsetsize) {
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if (i > gidsetsize) {
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i = -EINVAL;
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goto out;
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}
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2008-11-13 16:39:18 -07:00
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if (groups16_to_user(grouplist, cred->group_info)) {
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2005-04-16 16:20:36 -06:00
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i = -EFAULT;
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goto out;
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}
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}
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out:
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return i;
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}
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2009-01-14 06:14:21 -07:00
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SYSCALL_DEFINE2(setgroups16, int, gidsetsize, old_gid_t __user *, grouplist)
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2005-04-16 16:20:36 -06:00
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{
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struct group_info *group_info;
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int retval;
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2014-12-05 16:19:27 -07:00
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if (!may_setgroups())
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2005-04-16 16:20:36 -06:00
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return -EPERM;
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if ((unsigned)gidsetsize > NGROUPS_MAX)
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return -EINVAL;
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group_info = groups_alloc(gidsetsize);
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if (!group_info)
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return -ENOMEM;
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retval = groups16_from_user(group_info, grouplist);
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if (retval) {
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put_group_info(group_info);
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return retval;
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}
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retval = set_current_groups(group_info);
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put_group_info(group_info);
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return retval;
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}
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2009-01-14 06:14:21 -07:00
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SYSCALL_DEFINE0(getuid16)
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2005-04-16 16:20:36 -06:00
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{
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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>
2012-02-07 19:51:01 -07:00
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return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:21 -07:00
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SYSCALL_DEFINE0(geteuid16)
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2005-04-16 16:20:36 -06:00
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{
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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>
2012-02-07 19:51:01 -07:00
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return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:21 -07:00
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SYSCALL_DEFINE0(getgid16)
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2005-04-16 16:20:36 -06:00
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{
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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>
2012-02-07 19:51:01 -07:00
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return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
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2005-04-16 16:20:36 -06:00
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}
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2009-01-14 06:14:21 -07:00
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SYSCALL_DEFINE0(getegid16)
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2005-04-16 16:20:36 -06:00
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{
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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>
2012-02-07 19:51:01 -07:00
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return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
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2005-04-16 16:20:36 -06:00
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}
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