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ath10k: drop MPDU which has discard flag set by firmware for SDIO

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commit 079a108feb upstream.

When the discard flag is set by the firmware for an MPDU, it should be
dropped. This allows a mitigation for CVE-2020-24588 to be implemented
in the firmware.

Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00049

Cc: stable@vger.kernel.org
Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Link: https://lore.kernel.org/r/20210511200110.11968c725b5c.Idd166365ebea2771c0c0a38c78b5060750f90e17@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wen Gong 2021-05-11 20:02:55 +02:00 • committed by Greg Kroah-Hartman
commit c4d5271830
2 changed files with 18 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

5
drivers/net/wireless/ath/ath10k/htt_rx.c
View file

@ -2312,6 +2312,11 @@ static bool ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt *htt,
fw_desc = &rx->fw_desc;
rx_desc_len = fw_desc->len;
if (fw_desc->u.bits.discard) {
ath10k_dbg(ar, ATH10K_DBG_HTT, "htt discard mpdu\n");
goto err;
}
/* I have not yet seen any case where num_mpdu_ranges > 1.
* qcacld does not seem handle that case either, so we introduce the
* same limitiation here as well.

14
drivers/net/wireless/ath/ath10k/rx_desc.h
View file

@ -1282,7 +1282,19 @@ struct fw_rx_desc_base {
#define FW_RX_DESC_UDP (1 << 6)
struct fw_rx_desc_hl {
u8 info0;
union {
struct {
u8 discard:1,
forward:1,
any_err:1,
dup_err:1,
reserved:1,
inspect:1,
extension:2;
} bits;
u8 info0;
} u;
u8 version;
u8 len;
u8 flags;