Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Wrapper functions for 16bit uid back compatibility. All nicely tied | |
3 | * together in the faint hope we can take the out in five years time. | |
4 | */ | |
5 | ||
6 | #include <linux/mm.h> | |
7 | #include <linux/utsname.h> | |
8 | #include <linux/mman.h> | |
9 | #include <linux/smp_lock.h> | |
10 | #include <linux/notifier.h> | |
11 | #include <linux/reboot.h> | |
12 | #include <linux/prctl.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/highuid.h> | |
15 | #include <linux/security.h> | |
16 | #include <linux/syscalls.h> | |
17 | ||
18 | #include <asm/uaccess.h> | |
19 | ||
20 | asmlinkage long sys_chown16(const char __user * filename, old_uid_t user, old_gid_t group) | |
21 | { | |
22 | return sys_chown(filename, low2highuid(user), low2highgid(group)); | |
23 | } | |
24 | ||
25 | asmlinkage long sys_lchown16(const char __user * filename, old_uid_t user, old_gid_t group) | |
26 | { | |
27 | return sys_lchown(filename, low2highuid(user), low2highgid(group)); | |
28 | } | |
29 | ||
30 | asmlinkage long sys_fchown16(unsigned int fd, old_uid_t user, old_gid_t group) | |
31 | { | |
32 | return sys_fchown(fd, low2highuid(user), low2highgid(group)); | |
33 | } | |
34 | ||
35 | asmlinkage long sys_setregid16(old_gid_t rgid, old_gid_t egid) | |
36 | { | |
37 | return sys_setregid(low2highgid(rgid), low2highgid(egid)); | |
38 | } | |
39 | ||
40 | asmlinkage long sys_setgid16(old_gid_t gid) | |
41 | { | |
42 | return sys_setgid(low2highgid(gid)); | |
43 | } | |
44 | ||
45 | asmlinkage long sys_setreuid16(old_uid_t ruid, old_uid_t euid) | |
46 | { | |
47 | return sys_setreuid(low2highuid(ruid), low2highuid(euid)); | |
48 | } | |
49 | ||
50 | asmlinkage long sys_setuid16(old_uid_t uid) | |
51 | { | |
52 | return sys_setuid(low2highuid(uid)); | |
53 | } | |
54 | ||
55 | asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid) | |
56 | { | |
57 | return sys_setresuid(low2highuid(ruid), low2highuid(euid), | |
58 | low2highuid(suid)); | |
59 | } | |
60 | ||
61 | asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, old_uid_t __user *suid) | |
62 | { | |
63 | int retval; | |
64 | ||
65 | if (!(retval = put_user(high2lowuid(current->uid), ruid)) && | |
66 | !(retval = put_user(high2lowuid(current->euid), euid))) | |
67 | retval = put_user(high2lowuid(current->suid), suid); | |
68 | ||
69 | return retval; | |
70 | } | |
71 | ||
72 | asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid) | |
73 | { | |
74 | return sys_setresgid(low2highgid(rgid), low2highgid(egid), | |
75 | low2highgid(sgid)); | |
76 | } | |
77 | ||
78 | asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, old_gid_t __user *sgid) | |
79 | { | |
80 | int retval; | |
81 | ||
82 | if (!(retval = put_user(high2lowgid(current->gid), rgid)) && | |
83 | !(retval = put_user(high2lowgid(current->egid), egid))) | |
84 | retval = put_user(high2lowgid(current->sgid), sgid); | |
85 | ||
86 | return retval; | |
87 | } | |
88 | ||
89 | asmlinkage long sys_setfsuid16(old_uid_t uid) | |
90 | { | |
91 | return sys_setfsuid(low2highuid(uid)); | |
92 | } | |
93 | ||
94 | asmlinkage long sys_setfsgid16(old_gid_t gid) | |
95 | { | |
96 | return sys_setfsgid(low2highgid(gid)); | |
97 | } | |
98 | ||
99 | static int groups16_to_user(old_gid_t __user *grouplist, | |
100 | struct group_info *group_info) | |
101 | { | |
102 | int i; | |
103 | old_gid_t group; | |
104 | ||
105 | for (i = 0; i < group_info->ngroups; i++) { | |
106 | group = high2lowgid(GROUP_AT(group_info, i)); | |
107 | if (put_user(group, grouplist+i)) | |
108 | return -EFAULT; | |
109 | } | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
114 | static int groups16_from_user(struct group_info *group_info, | |
115 | old_gid_t __user *grouplist) | |
116 | { | |
117 | int i; | |
118 | old_gid_t group; | |
119 | ||
120 | for (i = 0; i < group_info->ngroups; i++) { | |
121 | if (get_user(group, grouplist+i)) | |
122 | return -EFAULT; | |
123 | GROUP_AT(group_info, i) = low2highgid(group); | |
124 | } | |
125 | ||
126 | return 0; | |
127 | } | |
128 | ||
129 | asmlinkage long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist) | |
130 | { | |
131 | int i = 0; | |
132 | ||
133 | if (gidsetsize < 0) | |
134 | return -EINVAL; | |
135 | ||
136 | get_group_info(current->group_info); | |
137 | i = current->group_info->ngroups; | |
138 | if (gidsetsize) { | |
139 | if (i > gidsetsize) { | |
140 | i = -EINVAL; | |
141 | goto out; | |
142 | } | |
143 | if (groups16_to_user(grouplist, current->group_info)) { | |
144 | i = -EFAULT; | |
145 | goto out; | |
146 | } | |
147 | } | |
148 | out: | |
149 | put_group_info(current->group_info); | |
150 | return i; | |
151 | } | |
152 | ||
153 | asmlinkage long sys_setgroups16(int gidsetsize, old_gid_t __user *grouplist) | |
154 | { | |
155 | struct group_info *group_info; | |
156 | int retval; | |
157 | ||
158 | if (!capable(CAP_SETGID)) | |
159 | return -EPERM; | |
160 | if ((unsigned)gidsetsize > NGROUPS_MAX) | |
161 | return -EINVAL; | |
162 | ||
163 | group_info = groups_alloc(gidsetsize); | |
164 | if (!group_info) | |
165 | return -ENOMEM; | |
166 | retval = groups16_from_user(group_info, grouplist); | |
167 | if (retval) { | |
168 | put_group_info(group_info); | |
169 | return retval; | |
170 | } | |
171 | ||
172 | retval = set_current_groups(group_info); | |
173 | put_group_info(group_info); | |
174 | ||
175 | return retval; | |
176 | } | |
177 | ||
178 | asmlinkage long sys_getuid16(void) | |
179 | { | |
180 | return high2lowuid(current->uid); | |
181 | } | |
182 | ||
183 | asmlinkage long sys_geteuid16(void) | |
184 | { | |
185 | return high2lowuid(current->euid); | |
186 | } | |
187 | ||
188 | asmlinkage long sys_getgid16(void) | |
189 | { | |
190 | return high2lowgid(current->gid); | |
191 | } | |
192 | ||
193 | asmlinkage long sys_getegid16(void) | |
194 | { | |
195 | return high2lowgid(current->egid); | |
196 | } |