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2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390 
 kernel/arch/s390/kernel/compat_linux.c
....@@ -34,7 +34,6 @@
3434 #include <linux/stat.h>
3535 #include <linux/filter.h>
3636 #include <linux/highmem.h>
37
-#include <linux/highuid.h>
3837 #include <linux/mman.h>
3938 #include <linux/ipv6.h>
4039 #include <linux/in.h>
....@@ -58,245 +57,13 @@
5857 
5958 #include "compat_linux.h"
6059 
61
-/* For this source file, we want overflow handling. */
62
-
63
-#undef high2lowuid
64
-#undef high2lowgid
65
-#undef low2highuid
66
-#undef low2highgid
67
-#undef SET_UID16
68
-#undef SET_GID16
69
-#undef NEW_TO_OLD_UID
70
-#undef NEW_TO_OLD_GID
71
-#undef SET_OLDSTAT_UID
72
-#undef SET_OLDSTAT_GID
73
-#undef SET_STAT_UID
74
-#undef SET_STAT_GID
75
-
76
-#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
77
-#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
78
-#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
79
-#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
80
-#define SET_UID16(var, uid)	var = high2lowuid(uid)
81
-#define SET_GID16(var, gid)	var = high2lowgid(gid)
82
-#define NEW_TO_OLD_UID(uid)	high2lowuid(uid)
83
-#define NEW_TO_OLD_GID(gid)	high2lowgid(gid)
84
-#define SET_OLDSTAT_UID(stat, uid)	(stat).st_uid = high2lowuid(uid)
85
-#define SET_OLDSTAT_GID(stat, gid)	(stat).st_gid = high2lowgid(gid)
86
-#define SET_STAT_UID(stat, uid)		(stat).st_uid = high2lowuid(uid)
87
-#define SET_STAT_GID(stat, gid)		(stat).st_gid = high2lowgid(gid)
88
-
89
-COMPAT_SYSCALL_DEFINE3(s390_chown16, const char __user *, filename,
90
-		       u16, user, u16, group)
91
-{
92
-	return ksys_chown(filename, low2highuid(user), low2highgid(group));
93
-}
94
-
95
-COMPAT_SYSCALL_DEFINE3(s390_lchown16, const char __user *,
96
-		       filename, u16, user, u16, group)
97
-{
98
-	return ksys_lchown(filename, low2highuid(user), low2highgid(group));
99
-}
100
-
101
-COMPAT_SYSCALL_DEFINE3(s390_fchown16, unsigned int, fd, u16, user, u16, group)
102
-{
103
-	return ksys_fchown(fd, low2highuid(user), low2highgid(group));
104
-}
105
-
106
-COMPAT_SYSCALL_DEFINE2(s390_setregid16, u16, rgid, u16, egid)
107
-{
108
-	return sys_setregid(low2highgid(rgid), low2highgid(egid));
109
-}
110
-
111
-COMPAT_SYSCALL_DEFINE1(s390_setgid16, u16, gid)
112
-{
113
-	return sys_setgid(low2highgid(gid));
114
-}
115
-
116
-COMPAT_SYSCALL_DEFINE2(s390_setreuid16, u16, ruid, u16, euid)
117
-{
118
-	return sys_setreuid(low2highuid(ruid), low2highuid(euid));
119
-}
120
-
121
-COMPAT_SYSCALL_DEFINE1(s390_setuid16, u16, uid)
122
-{
123
-	return sys_setuid(low2highuid(uid));
124
-}
125
-
126
-COMPAT_SYSCALL_DEFINE3(s390_setresuid16, u16, ruid, u16, euid, u16, suid)
127
-{
128
-	return sys_setresuid(low2highuid(ruid), low2highuid(euid),
129
-			     low2highuid(suid));
130
-}
131
-
132
-COMPAT_SYSCALL_DEFINE3(s390_getresuid16, u16 __user *, ruidp,
133
-		       u16 __user *, euidp, u16 __user *, suidp)
134
-{
135
-	const struct cred *cred = current_cred();
136
-	int retval;
137
-	u16 ruid, euid, suid;
138
-
139
-	ruid = high2lowuid(from_kuid_munged(cred->user_ns, cred->uid));
140
-	euid = high2lowuid(from_kuid_munged(cred->user_ns, cred->euid));
141
-	suid = high2lowuid(from_kuid_munged(cred->user_ns, cred->suid));
142
-
143
-	if (!(retval   = put_user(ruid, ruidp)) &&
144
-	    !(retval   = put_user(euid, euidp)))
145
-		retval = put_user(suid, suidp);
146
-
147
-	return retval;
148
-}
149
-
150
-COMPAT_SYSCALL_DEFINE3(s390_setresgid16, u16, rgid, u16, egid, u16, sgid)
151
-{
152
-	return sys_setresgid(low2highgid(rgid), low2highgid(egid),
153
-			     low2highgid(sgid));
154
-}
155
-
156
-COMPAT_SYSCALL_DEFINE3(s390_getresgid16, u16 __user *, rgidp,
157
-		       u16 __user *, egidp, u16 __user *, sgidp)
158
-{
159
-	const struct cred *cred = current_cred();
160
-	int retval;
161
-	u16 rgid, egid, sgid;
162
-
163
-	rgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->gid));
164
-	egid = high2lowgid(from_kgid_munged(cred->user_ns, cred->egid));
165
-	sgid = high2lowgid(from_kgid_munged(cred->user_ns, cred->sgid));
166
-
167
-	if (!(retval   = put_user(rgid, rgidp)) &&
168
-	    !(retval   = put_user(egid, egidp)))
169
-		retval = put_user(sgid, sgidp);
170
-
171
-	return retval;
172
-}
173
-
174
-COMPAT_SYSCALL_DEFINE1(s390_setfsuid16, u16, uid)
175
-{
176
-	return sys_setfsuid(low2highuid(uid));
177
-}
178
-
179
-COMPAT_SYSCALL_DEFINE1(s390_setfsgid16, u16, gid)
180
-{
181
-	return sys_setfsgid(low2highgid(gid));
182
-}
183
-
184
-static int groups16_to_user(u16 __user *grouplist, struct group_info *group_info)
185
-{
186
-	struct user_namespace *user_ns = current_user_ns();
187
-	int i;
188
-	u16 group;
189
-	kgid_t kgid;
190
-
191
-	for (i = 0; i < group_info->ngroups; i++) {
192
-		kgid = group_info->gid[i];
193
-		group = (u16)from_kgid_munged(user_ns, kgid);
194
-		if (put_user(group, grouplist+i))
195
-			return -EFAULT;
196
-	}
197
-
198
-	return 0;
199
-}
200
-
201
-static int groups16_from_user(struct group_info *group_info, u16 __user *grouplist)
202
-{
203
-	struct user_namespace *user_ns = current_user_ns();
204
-	int i;
205
-	u16 group;
206
-	kgid_t kgid;
207
-
208
-	for (i = 0; i < group_info->ngroups; i++) {
209
-		if (get_user(group, grouplist+i))
210
-			return  -EFAULT;
211
-
212
-		kgid = make_kgid(user_ns, (gid_t)group);
213
-		if (!gid_valid(kgid))
214
-			return -EINVAL;
215
-
216
-		group_info->gid[i] = kgid;
217
-	}
218
-
219
-	return 0;
220
-}
221
-
222
-COMPAT_SYSCALL_DEFINE2(s390_getgroups16, int, gidsetsize, u16 __user *, grouplist)
223
-{
224
-	const struct cred *cred = current_cred();
225
-	int i;
226
-
227
-	if (gidsetsize < 0)
228
-		return -EINVAL;
229
-
230
-	get_group_info(cred->group_info);
231
-	i = cred->group_info->ngroups;
232
-	if (gidsetsize) {
233
-		if (i > gidsetsize) {
234
-			i = -EINVAL;
235
-			goto out;
236
-		}
237
-		if (groups16_to_user(grouplist, cred->group_info)) {
238
-			i = -EFAULT;
239
-			goto out;
240
-		}
241
-	}
242
-out:
243
-	put_group_info(cred->group_info);
244
-	return i;
245
-}
246
-
247
-COMPAT_SYSCALL_DEFINE2(s390_setgroups16, int, gidsetsize, u16 __user *, grouplist)
248
-{
249
-	struct group_info *group_info;
250
-	int retval;
251
-
252
-	if (!may_setgroups())
253
-		return -EPERM;
254
-	if ((unsigned)gidsetsize > NGROUPS_MAX)
255
-		return -EINVAL;
256
-
257
-	group_info = groups_alloc(gidsetsize);
258
-	if (!group_info)
259
-		return -ENOMEM;
260
-	retval = groups16_from_user(group_info, grouplist);
261
-	if (retval) {
262
-		put_group_info(group_info);
263
-		return retval;
264
-	}
265
-
266
-	groups_sort(group_info);
267
-	retval = set_current_groups(group_info);
268
-	put_group_info(group_info);
269
-
270
-	return retval;
271
-}
272
-
273
-COMPAT_SYSCALL_DEFINE0(s390_getuid16)
274
-{
275
-	return high2lowuid(from_kuid_munged(current_user_ns(), current_uid()));
276
-}
277
-
278
-COMPAT_SYSCALL_DEFINE0(s390_geteuid16)
279
-{
280
-	return high2lowuid(from_kuid_munged(current_user_ns(), current_euid()));
281
-}
282
-
283
-COMPAT_SYSCALL_DEFINE0(s390_getgid16)
284
-{
285
-	return high2lowgid(from_kgid_munged(current_user_ns(), current_gid()));
286
-}
287
-
288
-COMPAT_SYSCALL_DEFINE0(s390_getegid16)
289
-{
290
-	return high2lowgid(from_kgid_munged(current_user_ns(), current_egid()));
291
-}
292
-
29360 #ifdef CONFIG_SYSVIPC
29461 COMPAT_SYSCALL_DEFINE5(s390_ipc, uint, call, int, first, compat_ulong_t, second,
29562 		compat_ulong_t, third, compat_uptr_t, ptr)
29663 {
29764 	if (call >> 16)		/* hack for backward compatibility */
29865 		return -EINVAL;
299
-	return compat_sys_ipc(call, first, second, third, ptr, third);
66
+	return compat_ksys_ipc(call, first, second, third, ptr, third);
30067 }
30168 #endif
30269