X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fsysctl.c;h=d7ffdc59816ad3f822389d508f3c5ff1b030578d;hb=ffd8211fb18e1052b2d9eded629cc3c0b872d06a;hp=874e813e40c8d33345d4bc8215a9da327294adec;hpb=2c4c7155f25192da3511a6c911db4d08102d36c4;p=linux-2.6

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 874e813e40..d7ffdc5981 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1434,7 +1434,8 @@ void register_sysctl_root(struct ctl_table_root *root)
 
 #ifdef CONFIG_SYSCTL_SYSCALL
 /* Perform the actual read/write of a sysctl table entry. */
-static int do_sysctl_strategy(struct ctl_table *table,
+static int do_sysctl_strategy(struct ctl_table_root *root,
+			struct ctl_table *table,
 			int __user *name, int nlen,
 			void __user *oldval, size_t __user *oldlenp,
 			void __user *newval, size_t newlen)
@@ -1445,7 +1446,7 @@ static int do_sysctl_strategy(struct ctl_table *table,
 		op |= 004;
 	if (newval)
 		op |= 002;
-	if (sysctl_perm(table, op))
+	if (sysctl_perm(root, table, op))
 		return -EPERM;
 
 	if (table->strategy) {
@@ -1471,6 +1472,7 @@ static int do_sysctl_strategy(struct ctl_table *table,
 static int parse_table(int __user *name, int nlen,
 		       void __user *oldval, size_t __user *oldlenp,
 		       void __user *newval, size_t newlen,
+		       struct ctl_table_root *root,
 		       struct ctl_table *table)
 {
 	int n;
@@ -1485,14 +1487,14 @@ repeat:
 		if (n == table->ctl_name) {
 			int error;
 			if (table->child) {
-				if (sysctl_perm(table, 001))
+				if (sysctl_perm(root, table, 001))
 					return -EPERM;
 				name++;
 				nlen--;
 				table = table->child;
 				goto repeat;
 			}
-			error = do_sysctl_strategy(table, name, nlen,
+			error = do_sysctl_strategy(root, table, name, nlen,
 						   oldval, oldlenp,
 						   newval, newlen);
 			return error;
@@ -1518,7 +1520,8 @@ int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *ol
 	for (head = sysctl_head_next(NULL); head;
 			head = sysctl_head_next(head)) {
 		error = parse_table(name, nlen, oldval, oldlenp, 
-					newval, newlen, head->ctl_table);
+					newval, newlen,
+					head->root, head->ctl_table);
 		if (error != -ENOTDIR) {
 			sysctl_head_finish(head);
 			break;
@@ -1564,13 +1567,21 @@ static int test_perm(int mode, int op)
 	return -EACCES;
 }
 
-int sysctl_perm(struct ctl_table *table, int op)
+int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
 {
 	int error;
+	int mode;
+
 	error = security_sysctl(table, op);
 	if (error)
 		return error;
-	return test_perm(table->mode, op);
+
+	if (root->permissions)
+		mode = root->permissions(root, current->nsproxy, table);
+	else
+		mode = table->mode;
+
+	return test_perm(mode, op);
 }
 
 static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)