From: Avinash Patil Date: Fri, 12 Sep 2014 14:38:46 +0000 (+0530) Subject: mwifiex: fix probable memory corruption while processing TDLS frame X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3c99832d74777c9ec5545a92450fac5d37b0d0e1;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 --- 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];