The original code would break with a 4K stack.
Signed-off-by: Dan Carpenter <error27@xxxxxxxxx>
---
This was compile tested only. Sorry about that.
diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 1a79a6c..835758f 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -417,9 +417,11 @@ static ssize_t inquiry_cache_read(struct file *file, char __user *userbuf,
struct hci_dev *hdev = file->private_data;
struct inquiry_cache *cache = &hdev->inq_cache;
struct inquiry_entry *e;
- char buf[4096];
+ char *buf;
int n = 0;
+ ssize_t ret;
+ buf = kmalloc(4096, GFP_KERNEL);
hci_dev_lock_bh(hdev);
for (e = cache->list; e; e = e->next) {
@@ -437,7 +439,10 @@ static ssize_t inquiry_cache_read(struct file *file, char __user *userbuf,
hci_dev_unlock_bh(hdev);
- return simple_read_from_buffer(userbuf, count, ppos, buf, n);
+ ret = simple_read_from_buffer(userbuf, count, ppos, buf, n);
+ kfree(buf);
+
+ return ret;
}
static const struct file_operations inquiry_cache_fops = {
--
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