Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:
> If "evt_len" is 1 then we try to memcpy() negative 3 bytes and it would
> cause memory corruption.
>
> Fixes: d930faee141b ("mwifiex: add support for Marvell pcie8766 chipset")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c
> index 97a6199692ab..7538543d46fa 100644
> --- a/drivers/net/wireless/marvell/mwifiex/pcie.c
> +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
> @@ -1881,7 +1881,8 @@ static int mwifiex_pcie_process_event_ready(struct mwifiex_adapter *adapter)
> mwifiex_dbg(adapter, EVENT,
> "info: Event length: %d\n", evt_len);
>
> - if ((evt_len > 0) && (evt_len < MAX_EVENT_SIZE))
> + if (evt_len > MWIFIEX_EVENT_HEADER_LEN &&
> + evt_len < MAX_EVENT_SIZE)
> memcpy(adapter->event_body, skb_cmd->data +
> MWIFIEX_EVENT_HEADER_LEN, evt_len -
> MWIFIEX_EVENT_HEADER_LEN);
Patch applied to wireless-drivers-next.git, thanks.
01eca2842874 mwifiex: pcie: tighten a check in mwifiex_pcie_process_event_ready()
--
https://patchwork.kernel.org/patch/10324435/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
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