diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c
index bac832ce1873f9958cb2ef36168104a08d7b482a..57d22cd976e5d5a62810b2a58ffe039ae06a729e 100644
--- a/drivers/net/wireless/ath/ath10k/debug.c
+++ b/drivers/net/wireless/ath/ath10k/debug.c
@@ -987,13 +987,13 @@ static ssize_t ath10k_write_htt_max_amsdu_ampdu(struct file *file,
 {
 	struct ath10k *ar = file->private_data;
 	int res;
-	char buf[64];
+	char buf[64] = {0};
 	unsigned int amsdu, ampdu;
 
-	simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
-
-	/* make sure that buf is null terminated */
-	buf[sizeof(buf) - 1] = 0;
+	res = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos,
+				     user_buf, count);
+	if (res <= 0)
+		return res;
 
 	res = sscanf(buf, "%u %u", &amsdu, &ampdu);
 
@@ -1043,14 +1043,14 @@ static ssize_t ath10k_write_fw_dbglog(struct file *file,
 {
 	struct ath10k *ar = file->private_data;
 	int ret;
-	char buf[96];
+	char buf[96] = {0};
 	unsigned int log_level;
 	u64 mask;
 
-	simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
-
-	/* make sure that buf is null terminated */
-	buf[sizeof(buf) - 1] = 0;
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos,
+				     user_buf, count);
+	if (ret <= 0)
+		return ret;
 
 	ret = sscanf(buf, "%llx %u", &mask, &log_level);
 
diff --git a/drivers/net/wireless/ath/ath10k/debugfs_sta.c b/drivers/net/wireless/ath/ath10k/debugfs_sta.c
index 8f688f136c225259c16f844c91b459c37506a577..a63c97e2c50c5d29915b334d2937eca5b3892601 100644
--- a/drivers/net/wireless/ath/ath10k/debugfs_sta.c
+++ b/drivers/net/wireless/ath/ath10k/debugfs_sta.c
@@ -254,12 +254,12 @@ static ssize_t ath10k_dbg_sta_write_addba(struct file *file,
 	struct ath10k *ar = arsta->arvif->ar;
 	u32 tid, buf_size;
 	int ret;
-	char buf[64];
+	char buf[64] = {0};
 
-	simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
-
-	/* make sure that buf is null terminated */
-	buf[sizeof(buf) - 1] = '\0';
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos,
+				     user_buf, count);
+	if (ret <= 0)
+		return ret;
 
 	ret = sscanf(buf, "%u %u", &tid, &buf_size);
 	if (ret != 2)
@@ -305,12 +305,12 @@ static ssize_t ath10k_dbg_sta_write_addba_resp(struct file *file,
 	struct ath10k *ar = arsta->arvif->ar;
 	u32 tid, status;
 	int ret;
-	char buf[64];
-
-	simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
+	char buf[64] = {0};
 
-	/* make sure that buf is null terminated */
-	buf[sizeof(buf) - 1] = '\0';
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos,
+				     user_buf, count);
+	if (ret <= 0)
+		return ret;
 
 	ret = sscanf(buf, "%u %u", &tid, &status);
 	if (ret != 2)
@@ -355,12 +355,12 @@ static ssize_t ath10k_dbg_sta_write_delba(struct file *file,
 	struct ath10k *ar = arsta->arvif->ar;
 	u32 tid, initiator, reason;
 	int ret;
-	char buf[64];
-
-	simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
+	char buf[64] = {0};
 
-	/* make sure that buf is null terminated */
-	buf[sizeof(buf) - 1] = '\0';
+	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos,
+				     user_buf, count);
+	if (ret <= 0)
+		return ret;
 
 	ret = sscanf(buf, "%u %u %u", &tid, &initiator, &reason);
 	if (ret != 3)