* [patch] mac80211: check for allocation failure in debugfs code
@ 2017-02-07 13:20 Dan Carpenter
2017-02-08 9:05 ` Johannes Berg
0 siblings, 1 reply; 2+ messages in thread
From: Dan Carpenter @ 2017-02-07 13:20 UTC (permalink / raw)
To: Johannes Berg, Ben Greear; +Cc: linux-wireless, kernel-janitors
kmalloc() can fail. Also let's move the allocation out of the
declaration block so it's easier to read.
Fixes: 4a5eccaa9350 ("mac80211: Show pending txqlen in debugfs.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index f62cd0e13c58..4689353aa263 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -249,12 +249,19 @@ static ssize_t misc_read(struct file *file, char __user *user_buf,
struct ieee80211_local *local = file->private_data;
/* Max len of each line is 16 characters, plus 9 for 'pending:\n' */
size_t bufsz = IEEE80211_MAX_QUEUES * 16 + 9;
- char *buf = kzalloc(bufsz, GFP_KERNEL);
- char *pos = buf, *end = buf + bufsz - 1;
+ char *buf;
+ char *pos, *end;
ssize_t rv;
int i;
int ln;
+ buf = kzalloc(bufsz, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ pos = buf;
+ end = buf + bufsz - 1;
+
pos += scnprintf(pos, end - pos, "pending:\n");
for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
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2017-02-07 13:20 [patch] mac80211: check for allocation failure in debugfs code Dan Carpenter
2017-02-08 9:05 ` Johannes Berg
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