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mwifiex: fix probable memory corruption while processing TDLS frame

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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 <dan.carpenter@oracle.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Avinash Patil 2014-09-12 20:08:46 +05:30 committed by John W. Linville
parent 4721c63b92
commit 3c99832d74
1 changed files with 3 additions and 1 deletions
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4
drivers/net/wireless/mwifiex/tdls.c
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@ -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];