diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2020-12-10 00:16:24 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2020-12-10 01:14:14 +0300 |
| commit | efc0ec5afb6e1488b3bdc4bbf85533d79d7e5f9f (patch) | |
| tree | 5c9ab5906333368c61f7cf9bf6efd5136e76f135 /drivers/net/wireless/intel/iwlwifi/dvm/rx.c | |
| parent | c6bae216907119a39e204a5011bd22e6c816cedb (diff) | |
| download | linux-efc0ec5afb6e1488b3bdc4bbf85533d79d7e5f9f.tar.xz | |
iwlwifi: validate MPDU length against notification length
The MPDU contained in a notification shouldn't be larger than the
notification size itself is, validate this.
Reported-by: Haggai Abramovsky <haggai.abramovsky@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201209231352.7c721ad37014.Id5746874ecfa208b60baa62691b2d9dc5dd4d89c@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/dvm/rx.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/dvm/rx.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/rx.c b/drivers/net/wireless/intel/iwlwifi/dvm/rx.c index 9d55ece05020..d06278558b33 100644 --- a/drivers/net/wireless/intel/iwlwifi/dvm/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/dvm/rx.c @@ -3,7 +3,7 @@ * * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2015 Intel Deutschland GmbH - * Copyright(c) 2018 Intel Corporation + * Copyright(c) 2018, 2020 Intel Corporation * * Portions of this file are derived from the ipw3945 project, as well * as portionhelp of the ieee80211 subsystem header files. @@ -786,7 +786,7 @@ static void iwlagn_rx_reply_rx(struct iwl_priv *priv, struct iwl_rx_phy_res *phy_res; __le32 rx_pkt_status; struct iwl_rx_mpdu_res_start *amsdu; - u32 len; + u32 len, pkt_len = iwl_rx_packet_len(pkt); u32 ampdu_status; u32 rate_n_flags; @@ -798,6 +798,12 @@ static void iwlagn_rx_reply_rx(struct iwl_priv *priv, amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data; header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu)); len = le16_to_cpu(amsdu->byte_count); + + if (unlikely(len + sizeof(*amsdu) + sizeof(__le32) > pkt_len)) { + IWL_DEBUG_DROP(priv, "FW lied about packet len\n"); + return; + } + rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len); ampdu_status = iwlagn_translate_rx_status(priv, le32_to_cpu(rx_pkt_status)); |