Most of the places in debugfs.c are missing a NULL check on the return value of
get_zeroed_page API call. Added required NULL check at appropriate places.
Signed-off-by: Kiran Divekar <kirandivekar@xxxxxxxxx>
---
drivers/net/wireless/libertas/debugfs.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/libertas/debugfs.c b/drivers/net/wireless/libertas/debugfs.c
index 811ffc3..893a55c 100644
--- a/drivers/net/wireless/libertas/debugfs.c
+++ b/drivers/net/wireless/libertas/debugfs.c
@@ -45,6 +45,8 @@ static ssize_t lbs_dev_info(struct file *file, char __user *userbuf,
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
ssize_t res;
+ if (!buf)
+ return -ENOMEM;
pos += snprintf(buf+pos, len-pos, "state = %s\n",
szStates[priv->connect_status]);
@@ -68,6 +70,8 @@ static ssize_t lbs_getscantable(struct file *file, char __user *userbuf,
char *buf = (char *)addr;
DECLARE_SSID_BUF(ssid);
struct bss_descriptor * iter_bss;
+ if (!buf)
+ return -ENOMEM;
pos += snprintf(buf+pos, len-pos,
"# | ch | rssi | bssid | cap | Qual | SSID \n");
@@ -110,6 +114,8 @@ static ssize_t lbs_sleepparams_write(struct file *file,
int p1, p2, p3, p4, p5, p6;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
buf_size = min(count, len - 1);
if (copy_from_user(buf, user_buf, buf_size)) {
@@ -148,6 +154,8 @@ static ssize_t lbs_sleepparams_read(struct file *file, char __user *userbuf,
struct sleep_params sp;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
ret = lbs_cmd_802_11_sleep_params(priv, CMD_ACT_GET, &sp);
if (ret)
@@ -433,6 +441,8 @@ static ssize_t lbs_rdmac_read(struct file *file, char __user *userbuf,
int ret;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
offval.offset = priv->mac_offset;
offval.value = 0;
@@ -457,6 +467,8 @@ static ssize_t lbs_rdmac_write(struct file *file,
ssize_t res, buf_size;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
buf_size = min(count, len - 1);
if (copy_from_user(buf, userbuf, buf_size)) {
@@ -481,6 +493,8 @@ static ssize_t lbs_wrmac_write(struct file *file,
struct lbs_offset_value offval;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
buf_size = min(count, len - 1);
if (copy_from_user(buf, userbuf, buf_size)) {
@@ -515,6 +529,8 @@ static ssize_t lbs_rdbbp_read(struct file *file, char __user *userbuf,
int ret;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
offval.offset = priv->bbp_offset;
offval.value = 0;
@@ -540,6 +556,8 @@ static ssize_t lbs_rdbbp_write(struct file *file,
ssize_t res, buf_size;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
buf_size = min(count, len - 1);
if (copy_from_user(buf, userbuf, buf_size)) {
@@ -564,6 +582,8 @@ static ssize_t lbs_wrbbp_write(struct file *file,
struct lbs_offset_value offval;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
buf_size = min(count, len - 1);
if (copy_from_user(buf, userbuf, buf_size)) {
@@ -598,6 +618,8 @@ static ssize_t lbs_rdrf_read(struct file *file, char __user *userbuf,
int ret;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
offval.offset = priv->rf_offset;
offval.value = 0;
@@ -623,6 +645,8 @@ static ssize_t lbs_rdrf_write(struct file *file,
ssize_t res, buf_size;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
buf_size = min(count, len - 1);
if (copy_from_user(buf, userbuf, buf_size)) {
@@ -647,6 +671,8 @@ static ssize_t lbs_wrrf_write(struct file *file,
struct lbs_offset_value offval;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
buf_size = min(count, len - 1);
if (copy_from_user(buf, userbuf, buf_size)) {
@@ -853,6 +879,8 @@ static ssize_t lbs_debugfs_read(struct file *file, char __user *userbuf,
struct debug_data *d;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
+ if (!buf)
+ return -ENOMEM;
p = buf;
--
1.5.3.4
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