1 files changed, 38 insertions, 18 deletions

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 8bff2c18fb5a..8e9f00fd6d18 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -54,6 +54,7 @@ extern int proc_nr_files(ctl_table *table, int write, struct file *filp,
 
 #ifdef CONFIG_X86
 #include <asm/nmi.h>
+#include <asm/stacktrace.h>
 #endif
 
 #if defined(CONFIG_SYSCTL)
@@ -170,7 +171,7 @@ static ssize_t proc_readsys(struct file *, char __user *, size_t, loff_t *);
 static ssize_t proc_writesys(struct file *, const char __user *, size_t, loff_t *);
 static int proc_opensys(struct inode *, struct file *);
 
-struct file_operations proc_sys_file_operations = {
+const struct file_operations proc_sys_file_operations = {
 	.open		= proc_opensys,
 	.read		= proc_readsys,
 	.write		= proc_writesys,
@@ -707,6 +708,14 @@ static ctl_table kern_table[] = {
 		.mode		= 0444,
 		.proc_handler	= &proc_dointvec,
 	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "kstack_depth_to_print",
+		.data		= &kstack_depth_to_print,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec,
+	},
 #endif
 #if defined(CONFIG_MMU)
 	{
@@ -977,17 +986,6 @@ static ctl_table vm_table[] = {
 		.extra1		= &zero,
 	},
 #endif
-#ifdef CONFIG_SWAP
-	{
-		.ctl_name	= VM_SWAP_TOKEN_TIMEOUT,
-		.procname	= "swap_token_timeout",
-		.data		= &swap_token_default_timeout,
-		.maxlen		= sizeof(swap_token_default_timeout),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_jiffies,
-		.strategy	= &sysctl_jiffies,
-	},
-#endif
 #ifdef CONFIG_NUMA
 	{
 		.ctl_name	= VM_ZONE_RECLAIM_MODE,
@@ -1315,7 +1313,9 @@ repeat:
 		return -ENOTDIR;
 	if (get_user(n, name))
 		return -EFAULT;
-	for ( ; table->ctl_name; table++) {
+	for ( ; table->ctl_name || table->procname; table++) {
+		if (!table->ctl_name)
+			continue;
 		if (n == table->ctl_name || table->ctl_name == CTL_ANY) {
 			int error;
 			if (table->child) {
@@ -1532,7 +1532,7 @@ static void register_proc_table(ctl_table * table, struct proc_dir_entry *root,
 	int len;
 	mode_t mode;
 	
-	for (; table->ctl_name; table++) {
+	for (; table->ctl_name || table->procname; table++) {
 		/* Can't do anything without a proc name. */
 		if (!table->procname)
 			continue;
@@ -1579,7 +1579,7 @@ static void register_proc_table(ctl_table * table, struct proc_dir_entry *root,
 static void unregister_proc_table(ctl_table * table, struct proc_dir_entry *root)
 {
 	struct proc_dir_entry *de;
-	for (; table->ctl_name; table++) {
+	for (; table->ctl_name || table->procname; table++) {
 		if (!(de = table->de))
 			continue;
 		if (de->mode & S_IFDIR) {
@@ -1884,7 +1884,7 @@ static int __do_proc_dointvec(void *tbl_data, ctl_table *table,
 			p = buf;
 			if (*p == '-' && left > 1) {
 				neg = 1;
-				left--, p++;
+				p++;
 			}
 			if (*p < '0' || *p > '9')
 				break;
@@ -2135,7 +2135,7 @@ static int __do_proc_doulongvec_minmax(void *data, ctl_table *table, int write,
 			p = buf;
 			if (*p == '-' && left > 1) {
 				neg = 1;
-				left--, p++;
+				p++;
 			}
 			if (*p < '0' || *p > '9')
 				break;
@@ -2680,13 +2680,33 @@ int sysctl_ms_jiffies(ctl_table *table, int __user *name, int nlen,
 asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
 {
 	static int msg_count;
+	struct __sysctl_args tmp;
+	int name[CTL_MAXNAME];
+	int i;
+
+	/* Read in the sysctl name for better debug message logging */
+	if (copy_from_user(&tmp, args, sizeof(tmp)))
+		return -EFAULT;
+	if (tmp.nlen <= 0 || tmp.nlen >= CTL_MAXNAME)
+		return -ENOTDIR;
+	for (i = 0; i < tmp.nlen; i++)
+		if (get_user(name[i], tmp.name + i))
+			return -EFAULT;
+
+	/* Ignore accesses to kernel.version */
+	if ((tmp.nlen == 2) && (name[0] == CTL_KERN) && (name[1] == KERN_VERSION))
+		goto out;
 
 	if (msg_count < 5) {
 		msg_count++;
 		printk(KERN_INFO
 			"warning: process `%s' used the removed sysctl "
-			"system call\n", current->comm);
+			"system call with ", current->comm);
+		for (i = 0; i < tmp.nlen; i++)
+			printk("%d.", name[i]);
+		printk("\n");
 	}
+out:
 	return -ENOSYS;
 }