From: Michael Buesch <mb@bu3sch.de>
Date: Fri, 2 Nov 2007 17:35:02 +0000 (+0100)
Subject: b43: debugfs SHM read buffer overrun fix
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=30c4ae42317666f3aeed658cdb8803c84ac6fe77;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

b43: debugfs SHM read buffer overrun fix

Fix possible buffer overrun.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/b43/debugfs.c b/drivers/net/wireless/b43/debugfs.c
index 734e70e1a06d..ef0075d9f9cb 100644
--- a/drivers/net/wireless/b43/debugfs.c
+++ b/drivers/net/wireless/b43/debugfs.c
@@ -128,7 +128,7 @@ static ssize_t shm_read_file(struct b43_wldev *dev,
 	__le16 *le16buf = (__le16 *)buf;
 
 	for (i = 0; i < 0x1000; i++) {
-		if (bufsize <= 0)
+		if (bufsize < sizeof(tmp))
 			break;
 		tmp = b43_shm_read16(dev, B43_SHM_SHARED, 2 * i);
 		le16buf[i] = cpu_to_le16(tmp);