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authorDan Carpenter <dan.carpenter@oracle.com>2017-04-22 13:47:23 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-06-26 07:13:09 +0200
commit0c967139e8320293819277b0dddf401192b5649f (patch)
tree4f6aace7a4ee39627c99f8297b4f47e7ac1233b0
parente59d91144545ee6810593fdb69d2df82f61f46a6 (diff)
staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data()
commit 784047eb2d3405a35087af70cba46170c5576b25 upstream. The "len" could be as low as -14 so we should check for negatives. Fixes: 9a7fe54ddc3a ("staging: r8188eu: Add source files for new driver - part 1") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/staging/rtl8188eu/core/rtw_ap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/rtl8188eu/core/rtw_ap.c b/drivers/staging/rtl8188eu/core/rtw_ap.c
index 3cdb40fea5ee..f5cedbbc552a 100644
--- a/drivers/staging/rtl8188eu/core/rtw_ap.c
+++ b/drivers/staging/rtl8188eu/core/rtw_ap.c
@@ -894,7 +894,7 @@ int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf, int len)
return _FAIL;
- if (len > MAX_IE_SZ)
+ if (len < 0 || len > MAX_IE_SZ)
return _FAIL;
pbss_network->IELength = len;