Staging: rtl8192e: array overflow in rtl92e_set_swcam()
"EntryNo" is comes from the user in the ioctl and it's a number between
0-255. The ieee->swcamtable[] array only has 32 elements so it can
result in memory corruption.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_cam.c b/drivers/staging/rtl8192e/rtl8192e/rtl_cam.c
index dc8c7a8..c146b7e 100644
--- a/drivers/staging/rtl8192e/rtl8192e/rtl_cam.c
+++ b/drivers/staging/rtl8192e/rtl8192e/rtl_cam.c
@@ -78,6 +78,10 @@
RT_TRACE(COMP_DBG,
"===========>%s():EntryNo is %d,KeyIndex is %d,KeyType is %d,is_mesh is %d\n",
__func__, EntryNo, KeyIndex, KeyType, is_mesh);
+
+ if (EntryNo >= TOTAL_CAM_ENTRY)
+ return;
+
if (!is_mesh) {
ieee->swcamtable[EntryNo].bused = true;
ieee->swcamtable[EntryNo].key_index = KeyIndex;