[patch] libertas: potential oops in debugfs
From: Dan Carpenter <hidden>
Date: 2013-10-29 19:10:24
Also in:
linux-wireless
Subsystem:
networking drivers (wireless), the rest · Maintainers:
Johannes Berg, Linus Torvalds
If we do a zero size write then it will oops. This can only be triggered by root. Reported-by: Nico Golde <redacted> Reported-by: Fabian Yamaguchi <redacted> Signed-off-by: Dan Carpenter <redacted>
diff --git a/drivers/net/wireless/libertas/debugfs.c b/drivers/net/wireless/libertas/debugfs.c
index 668dd27..a148f14 100644
--- a/drivers/net/wireless/libertas/debugfs.c
+++ b/drivers/net/wireless/libertas/debugfs.c@@ -913,6 +913,9 @@ static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf, char *p2; struct debug_data *d = f->private_data; + if (cnt == 0) + return 0; + pdata = kmalloc(cnt, GFP_KERNEL); if (pdata == NULL) return 0;