struct mwifiex_ie_types_chan_list_param_set::chan_scan_param is treated as a flexible array, so convert it into one so that it doesn't trip the array bounds sanitizer[1]. The code was already calculating sizes by not including the trailing single element, so no sizeof() change are needed. Link: https://github.com/KSPP/linux/issues/51 [1] Cc: Brian Norris <briannorris@xxxxxxxxxxxx> Cc: Kalle Valo <kvalo@xxxxxxxxxx> Cc: Dmitry Antipov <dmantipov@xxxxxxxxx> Cc: Johannes Berg <johannes.berg@xxxxxxxxx> Cc: zuoqilin <zuoqilin@xxxxxxxxxx> Cc: Ruan Jinjie <ruanjinjie@xxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx> Cc: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> Cc: linux-wireless@xxxxxxxxxxxxxxx Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> --- drivers/net/wireless/marvell/mwifiex/scan.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c b/drivers/net/wireless/marvell/mwifiex/scan.c index a2ddac363b10..0326b121747c 100644 --- a/drivers/net/wireless/marvell/mwifiex/scan.c +++ b/drivers/net/wireless/marvell/mwifiex/scan.c @@ -664,15 +664,14 @@ mwifiex_scan_channel_list(struct mwifiex_private *priv, /* Copy the current channel TLV to the command being prepared */ - memcpy(chan_tlv_out->chan_scan_param + tlv_idx, + memcpy(&chan_tlv_out->chan_scan_param[tlv_idx], tmp_chan_list, - sizeof(chan_tlv_out->chan_scan_param)); + sizeof(*chan_tlv_out->chan_scan_param)); /* Increment the TLV header length by the size appended */ le16_unaligned_add_cpu(&chan_tlv_out->header.len, - sizeof( - chan_tlv_out->chan_scan_param)); + sizeof(*chan_tlv_out->chan_scan_param)); /* * The tlv buffer length is set to the number of bytes @@ -2369,12 +2368,11 @@ int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv, chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX && bgscan_cfg_in->chan_list[chan_idx].chan_number; chan_idx++) { - temp_chan = chan_list_tlv->chan_scan_param + chan_idx; + temp_chan = &chan_list_tlv->chan_scan_param[chan_idx]; /* Increment the TLV header length by size appended */ le16_unaligned_add_cpu(&chan_list_tlv->header.len, - sizeof( - chan_list_tlv->chan_scan_param)); + sizeof(*chan_list_tlv->chan_scan_param)); temp_chan->chan_number = bgscan_cfg_in->chan_list[chan_idx].chan_number; @@ -2413,7 +2411,7 @@ int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv, chan_scan_param); le16_unaligned_add_cpu(&chan_list_tlv->header.len, chan_num * - sizeof(chan_list_tlv->chan_scan_param[0])); + sizeof(*chan_list_tlv->chan_scan_param)); } tlv_pos += (sizeof(chan_list_tlv->header) -- 2.34.1
