Root/
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/mman.h> |
8 | #include <linux/notifier.h> |
9 | #include <linux/reboot.h> |
10 | #include <linux/prctl.h> |
11 | #include <linux/capability.h> |
12 | #include <linux/init.h> |
13 | #include <linux/highuid.h> |
14 | #include <linux/security.h> |
15 | #include <linux/syscalls.h> |
16 | |
17 | #include <asm/uaccess.h> |
18 | |
19 | SYSCALL_DEFINE3(chown16, const char __user *, filename, old_uid_t, user, old_gid_t, group) |
20 | { |
21 | return sys_chown(filename, low2highuid(user), low2highgid(group)); |
22 | } |
23 | |
24 | SYSCALL_DEFINE3(lchown16, const char __user *, filename, old_uid_t, user, old_gid_t, group) |
25 | { |
26 | return sys_lchown(filename, low2highuid(user), low2highgid(group)); |
27 | } |
28 | |
29 | SYSCALL_DEFINE3(fchown16, unsigned int, fd, old_uid_t, user, old_gid_t, group) |
30 | { |
31 | return sys_fchown(fd, low2highuid(user), low2highgid(group)); |
32 | } |
33 | |
34 | SYSCALL_DEFINE2(setregid16, old_gid_t, rgid, old_gid_t, egid) |
35 | { |
36 | return sys_setregid(low2highgid(rgid), low2highgid(egid)); |
37 | } |
38 | |
39 | SYSCALL_DEFINE1(setgid16, old_gid_t, gid) |
40 | { |
41 | return sys_setgid(low2highgid(gid)); |
42 | } |
43 | |
44 | SYSCALL_DEFINE2(setreuid16, old_uid_t, ruid, old_uid_t, euid) |
45 | { |
46 | return sys_setreuid(low2highuid(ruid), low2highuid(euid)); |
47 | } |
48 | |
49 | SYSCALL_DEFINE1(setuid16, old_uid_t, uid) |
50 | { |
51 | return sys_setuid(low2highuid(uid)); |
52 | } |
53 | |
54 | SYSCALL_DEFINE3(setresuid16, old_uid_t, ruid, old_uid_t, euid, old_uid_t, suid) |
55 | { |
56 | return sys_setresuid(low2highuid(ruid), low2highuid(euid), |
57 | low2highuid(suid)); |
58 | } |
59 | |
60 | SYSCALL_DEFINE3(getresuid16, old_uid_t __user *, ruidp, old_uid_t __user *, euidp, old_uid_t __user *, suidp) |
61 | { |
62 | const struct cred *cred = current_cred(); |
63 | int retval; |
64 | old_uid_t ruid, euid, suid; |
65 | |
66 | ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid)); |
67 | euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid)); |
68 | suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid)); |
69 | |
70 | if (!(retval = put_user(ruid, ruidp)) && |
71 | !(retval = put_user(euid, euidp))) |
72 | retval = put_user(suid, suidp); |
73 | |
74 | return retval; |
75 | } |
76 | |
77 | SYSCALL_DEFINE3(setresgid16, old_gid_t, rgid, old_gid_t, egid, old_gid_t, sgid) |
78 | { |
79 | return sys_setresgid(low2highgid(rgid), low2highgid(egid), |
80 | low2highgid(sgid)); |
81 | } |
82 | |
83 | |
84 | SYSCALL_DEFINE3(getresgid16, old_gid_t __user *, rgidp, old_gid_t __user *, egidp, old_gid_t __user *, sgidp) |
85 | { |
86 | const struct cred *cred = current_cred(); |
87 | int retval; |
88 | old_gid_t rgid, egid, sgid; |
89 | |
90 | rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid)); |
91 | egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid)); |
92 | sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid)); |
93 | |
94 | if (!(retval = put_user(rgid, rgidp)) && |
95 | !(retval = put_user(egid, egidp))) |
96 | retval = put_user(sgid, sgidp); |
97 | |
98 | return retval; |
99 | } |
100 | |
101 | SYSCALL_DEFINE1(setfsuid16, old_uid_t, uid) |
102 | { |
103 | return sys_setfsuid(low2highuid(uid)); |
104 | } |
105 | |
106 | SYSCALL_DEFINE1(setfsgid16, old_gid_t, gid) |
107 | { |
108 | return sys_setfsgid(low2highgid(gid)); |
109 | } |
110 | |
111 | static int groups16_to_user(old_gid_t __user *grouplist, |
112 | struct group_info *group_info) |
113 | { |
114 | struct user_namespace *user_ns = current_user_ns(); |
115 | int i; |
116 | old_gid_t group; |
117 | kgid_t kgid; |
118 | |
119 | for (i = 0; i < group_info->ngroups; i++) { |
120 | kgid = GROUP_AT(group_info, i); |
121 | group = high2lowgid(from_kgid_munged(user_ns, kgid)); |
122 | if (put_user(group, grouplist+i)) |
123 | return -EFAULT; |
124 | } |
125 | |
126 | return 0; |
127 | } |
128 | |
129 | static int groups16_from_user(struct group_info *group_info, |
130 | old_gid_t __user *grouplist) |
131 | { |
132 | struct user_namespace *user_ns = current_user_ns(); |
133 | int i; |
134 | old_gid_t group; |
135 | kgid_t kgid; |
136 | |
137 | for (i = 0; i < group_info->ngroups; i++) { |
138 | if (get_user(group, grouplist+i)) |
139 | return -EFAULT; |
140 | |
141 | kgid = make_kgid(user_ns, low2highgid(group)); |
142 | if (!gid_valid(kgid)) |
143 | return -EINVAL; |
144 | |
145 | GROUP_AT(group_info, i) = kgid; |
146 | } |
147 | |
148 | return 0; |
149 | } |
150 | |
151 | SYSCALL_DEFINE2(getgroups16, int, gidsetsize, old_gid_t __user *, grouplist) |
152 | { |
153 | const struct cred *cred = current_cred(); |
154 | int i; |
155 | |
156 | if (gidsetsize < 0) |
157 | return -EINVAL; |
158 | |
159 | i = cred->group_info->ngroups; |
160 | if (gidsetsize) { |
161 | if (i > gidsetsize) { |
162 | i = -EINVAL; |
163 | goto out; |
164 | } |
165 | if (groups16_to_user(grouplist, cred->group_info)) { |
166 | i = -EFAULT; |
167 | goto out; |
168 | } |
169 | } |
170 | out: |
171 | return i; |
172 | } |
173 | |
174 | SYSCALL_DEFINE2(setgroups16, int, gidsetsize, old_gid_t __user *, grouplist) |
175 | { |
176 | struct group_info *group_info; |
177 | int retval; |
178 | |
179 | if (!ns_capable(current_user_ns(), CAP_SETGID)) |
180 | return -EPERM; |
181 | if ((unsigned)gidsetsize > NGROUPS_MAX) |
182 | return -EINVAL; |
183 | |
184 | group_info = groups_alloc(gidsetsize); |
185 | if (!group_info) |
186 | return -ENOMEM; |
187 | retval = groups16_from_user(group_info, grouplist); |
188 | if (retval) { |
189 | put_group_info(group_info); |
190 | return retval; |
191 | } |
192 | |
193 | retval = set_current_groups(group_info); |
194 | put_group_info(group_info); |
195 | |
196 | return retval; |
197 | } |
198 | |
199 | SYSCALL_DEFINE0(getuid16) |
200 | { |
201 | return high2lowuid(from_kuid_munged(current_user_ns(), current_uid())); |
202 | } |
203 | |
204 | SYSCALL_DEFINE0(geteuid16) |
205 | { |
206 | return high2lowuid(from_kuid_munged(current_user_ns(), current_euid())); |
207 | } |
208 | |
209 | SYSCALL_DEFINE0(getgid16) |
210 | { |
211 | return high2lowgid(from_kgid_munged(current_user_ns(), current_gid())); |
212 | } |
213 | |
214 | SYSCALL_DEFINE0(getegid16) |
215 | { |
216 | return high2lowgid(from_kgid_munged(current_user_ns(), current_egid())); |
217 | } |
218 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9