From 3c99832d74777c9ec5545a92450fac5d37b0d0e1 Mon Sep 17 00:00:00 2001 From: Avinash Patil Date: Fri, 12 Sep 2014 20:08:46 +0530 Subject: [PATCH] mwifiex: fix probable memory corruption while processing TDLS frame Size of RSN IE buffer in driver is 254 while maximum size of received buffer to be copied to RSN IE buffer can be 255. Add boundary check to copy maximum of 254 bytes into RSN IE buffer. Reported-by: Dan Carpenter Signed-off-by: Avinash Patil Signed-off-by: John W. Linville --- drivers/net/wireless/mwifiex/tdls.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/mwifiex/tdls.c b/drivers/net/wireless/mwifiex/tdls.c index 4c5fd953893d..e2949077f5b5 100644 --- a/drivers/net/wireless/mwifiex/tdls.c +++ b/drivers/net/wireless/mwifiex/tdls.c @@ -871,7 +871,9 @@ void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv, break; case WLAN_EID_RSN: memcpy((u8 *)&sta_ptr->tdls_cap.rsn_ie, pos, - sizeof(struct ieee_types_header) + pos[1]); + sizeof(struct ieee_types_header) + + min_t(u8, pos[1], IEEE_MAX_IE_SIZE - + sizeof(struct ieee_types_header))); break; case WLAN_EID_QOS_CAPA: sta_ptr->tdls_cap.qos_info = pos[2];