From 3a9b153c5591548612c3955c9600a98150c81875 Mon Sep 17 00:00:00 2001 From: Qing Xu Date: Thu, 2 Jan 2020 10:39:26 +0800 Subject: mwifiex: Fix possible buffer overflows in mwifiex_ret_wmm_get_status() mwifiex_ret_wmm_get_status() calls memcpy() without checking the destination size.Since the source is given from remote AP which contains illegal wmm elements , this may trigger a heap buffer overflow. Fix it by putting the length check before calling memcpy(). Signed-off-by: Qing Xu Signed-off-by: Kalle Valo --- drivers/net/wireless/marvell/mwifiex/wmm.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/net/wireless/marvell') diff --git a/drivers/net/wireless/marvell/mwifiex/wmm.c b/drivers/net/wireless/marvell/mwifiex/wmm.c index 41f0231376c0..132f9e8ed68c 100644 --- a/drivers/net/wireless/marvell/mwifiex/wmm.c +++ b/drivers/net/wireless/marvell/mwifiex/wmm.c @@ -970,6 +970,10 @@ int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv, "WMM Parameter Set Count: %d\n", wmm_param_ie->qos_info_bitmap & mask); + if (wmm_param_ie->vend_hdr.len + 2 > + sizeof(struct ieee_types_wmm_parameter)) + break; + memcpy((u8 *) &priv->curr_bss_params.bss_descriptor. wmm_ie, wmm_param_ie, wmm_param_ie->vend_hdr.len + 2); -- cgit v1.2.3