lkml.org 
[lkml]   [2019]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3] staging: wfx: fix potential vulnerability to spectre
Date
From: Jérôme Pouiller <jerome.pouiller@silabs.com>

array_index_nospec() should be applied after a bound check.

Fixes: 9bca45f3d692 ("staging: wfx: allow to send 802.11 frames")
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
v2: cut down commit-id to 12 characters
v3: fix missing include

drivers/staging/wfx/wfx.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/staging/wfx/wfx.h b/drivers/staging/wfx/wfx.h
index 489836837b0a..d678b5a08873 100644
--- a/drivers/staging/wfx/wfx.h
+++ b/drivers/staging/wfx/wfx.h
@@ -13,6 +13,7 @@
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
+#include <linux/nospec.h>
#include <net/mac80211.h>

#include "bh.h"
@@ -138,6 +139,7 @@ static inline struct wfx_vif *wdev_to_wvif(struct wfx_dev *wdev, int vif_id)
dev_dbg(wdev->dev, "requesting non-existent vif: %d\n", vif_id);
return NULL;
}
+ vif_id = array_index_nospec(vif_id, ARRAY_SIZE(wdev->vif));
if (!wdev->vif[vif_id]) {
dev_dbg(wdev->dev, "requesting non-allocated vif: %d\n", vif_id);
return NULL;
--
2.20.1
\
 
 \ /
  Last update: 2019-10-11 18:49    [W:0.050 / U:0.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site