Merging upstream version 4.19.269.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 15 insertions, 15 deletions

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 93a7bd418..4bb194f09 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -2081,13 +2081,14 @@ int proc_dostring(struct ctl_table *table, int write,
 			       (char __user *)buffer, lenp, ppos);
 }
 
-static size_t proc_skip_spaces(char **buf)
+static void proc_skip_spaces(char **buf, size_t *size)
 {
-	size_t ret;
-	char *tmp = skip_spaces(*buf);
-	ret = tmp - *buf;
-	*buf = tmp;
-	return ret;
+	while (*size) {
+		if (!isspace(**buf))
+			break;
+		(*size)--;
+		(*buf)++;
+	}
 }
 
 static void proc_skip_char(char **buf, size_t *size, const char v)
@@ -2156,13 +2157,12 @@ static int proc_get_long(char **buf, size_t *size,
 			  unsigned long *val, bool *neg,
 			  const char *perm_tr, unsigned perm_tr_len, char *tr)
 {
-	int len;
 	char *p, tmp[TMPBUFLEN];
+	ssize_t len = *size;
 
-	if (!*size)
+	if (len <= 0)
 		return -EINVAL;
 
-	len = *size;
 	if (len > TMPBUFLEN - 1)
 		len = TMPBUFLEN - 1;
 
@@ -2325,7 +2325,7 @@ static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
 		bool neg;
 
 		if (write) {
-			left -= proc_skip_spaces(&p);
+			proc_skip_spaces(&p, &left);
 
 			if (!left)
 				break;
@@ -2356,7 +2356,7 @@ static int __do_proc_dointvec(void *tbl_data, struct ctl_table *table,
 	if (!write && !first && left && !err)
 		err = proc_put_char(&buffer, &left, '\n');
 	if (write && !err && left)
-		left -= proc_skip_spaces(&p);
+		proc_skip_spaces(&p, &left);
 	if (write) {
 		kfree(kbuf);
 		if (first)
@@ -2405,7 +2405,7 @@ static int do_proc_douintvec_w(unsigned int *tbl_data,
 	if (IS_ERR(kbuf))
 		return -EINVAL;
 
-	left -= proc_skip_spaces(&p);
+	proc_skip_spaces(&p, &left);
 	if (!left) {
 		err = -EINVAL;
 		goto out_free;
@@ -2425,7 +2425,7 @@ static int do_proc_douintvec_w(unsigned int *tbl_data,
 	}
 
 	if (!err && left)
-		left -= proc_skip_spaces(&p);
+		proc_skip_spaces(&p, &left);
 
 out_free:
 	kfree(kbuf);
@@ -2846,7 +2846,7 @@ static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int
 		if (write) {
 			bool neg;
 
-			left -= proc_skip_spaces(&p);
+			proc_skip_spaces(&p, &left);
 			if (!left)
 				break;
 
@@ -2879,7 +2879,7 @@ static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int
 	if (!write && !first && left && !err)
 		err = proc_put_char(&buffer, &left, '\n');
 	if (write && !err)
-		left -= proc_skip_spaces(&p);
+		proc_skip_spaces(&p, &left);
 	if (write) {
 		kfree(kbuf);
 		if (first)