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https://github.com/Divested-Mobile/DivestOS-Build.git
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36 lines
1.3 KiB
Diff
36 lines
1.3 KiB
Diff
From a3f3e7ed54aaa4f5f6929f1ed460363fdc8964d6 Mon Sep 17 00:00:00 2001
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From: Insun Song <insun.song@broadcom.com>
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Date: Fri, 13 Jan 2017 16:25:59 -0800
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Subject: [PATCH] net: wireless: bcmdhd: fix overrun in wl_run_escan
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prevent buffer overrun case where WLC_GET_VALID_CHANNELS IOCTL
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overriden by attacker and its return manipulated.
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Signed-off-by: Insun Song <insun.song@broadcom.com>
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Change-Id: Ifbbaa3c2bdfd9bea7533d605303f18e17c8d85cc
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Bug: 34197514
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---
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drivers/net/wireless/bcmdhd/wl_cfg80211.c | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/drivers/net/wireless/bcmdhd/wl_cfg80211.c b/drivers/net/wireless/bcmdhd/wl_cfg80211.c
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index 41d07d310a7b2..c635b1b8a79af 100644
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--- a/drivers/net/wireless/bcmdhd/wl_cfg80211.c
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+++ b/drivers/net/wireless/bcmdhd/wl_cfg80211.c
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@@ -2268,6 +2268,15 @@ wl_run_escan(struct bcm_cfg80211 *cfg, struct net_device *ndev,
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if (!wl_get_valid_channels(ndev, chan_buf, sizeof(chan_buf))) {
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list = (wl_uint32_list_t *) chan_buf;
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n_valid_chan = dtoh32(list->count);
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+
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+ if (n_valid_chan > WL_NUMCHANNELS) {
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+ WL_ERR(("wrong n_valid_chan:%d\n",
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+ n_valid_chan));
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+ kfree(default_chan_list);
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+ err = -EINVAL;
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+ goto exit;
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+ }
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+
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for (i = 0; i < num_chans; i++)
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{
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_freq = request->channels[i]->center_freq;
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