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https://github.com/Divested-Mobile/DivestOS-Build.git
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80 lines
3.0 KiB
Diff
80 lines
3.0 KiB
Diff
From b7fb46c77af4623291f53a5453df733b8fb1fe18 Mon Sep 17 00:00:00 2001
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From: Sudhir Kohalli <sudhir.kohalli@broadcom.com>
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Date: Fri, 20 Jan 2017 17:32:53 -0800
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Subject: [PATCH] net: wireless: bcmdhd: Heap overflow in wl_run_escan.
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1) The default_chan_list buffer overflow is avoided by checking
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n_nodfs index does not exceed num_chans, which is the length
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of default_chan_list buffer.
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2) The SSID length check 32(max limit) is done and then the SSID
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name copied in extra buffer is null terminated. The extra buffer
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is allocated a length of of 33 in wl_iw_ioctl.c.
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3) Issue of chances of cumulative results->pkt_count length
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exceeding allocated memory length of results->total_count is
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avoided in this fix. change_array is the destination array
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whose length is allocated to results->total_count.
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Signed-off-by: Sudhir Kohalli <sudhir.kohalli@broadcom.com>
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Bug: 34197514
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Bug: 34199963
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Bug: 34198729
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Change-Id: I0cd268ab696daac938a99f451607a3f4b2cfaed3
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---
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drivers/net/wireless/bcmdhd/dhd_pno.c | 12 +++++++++++-
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drivers/net/wireless/bcmdhd/wl_cfg80211.c | 9 ++++++++-
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2 files changed, 19 insertions(+), 2 deletions(-)
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diff --git a/drivers/net/wireless/bcmdhd/dhd_pno.c b/drivers/net/wireless/bcmdhd/dhd_pno.c
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index ec2c347ca6219..95bfe2729855f 100644
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--- a/drivers/net/wireless/bcmdhd/dhd_pno.c
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+++ b/drivers/net/wireless/bcmdhd/dhd_pno.c
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@@ -3622,7 +3622,17 @@ void * dhd_handle_swc_evt(dhd_pub_t *dhd, const void *event_data, int *send_evt_
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}
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change_array = ¶ms->change_array[params->results_rxed_so_far];
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- memcpy(change_array, results->list, sizeof(wl_pfn_significant_net_t) * results->pkt_count);
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+ if ((params->results_rxed_so_far + results->pkt_count) >
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+ results->total_count) {
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+ DHD_ERROR(("Error: Invalid data reset the counters!!\n"));
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+ *send_evt_bytes = 0;
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+ kfree(params->change_array);
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+ params->change_array = NULL;
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+ return ptr;
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+ }
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+
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+ memcpy(change_array, results->list,
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+ sizeof(wl_pfn_significant_net_t) * results->pkt_count);
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params->results_rxed_so_far += results->pkt_count;
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if (params->results_rxed_so_far == results->total_count) {
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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 6cadcb56582be..063d49015e5a6 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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@@ -2288,6 +2288,9 @@ wl_run_escan(struct bcm_cfg80211 *cfg, struct net_device *ndev,
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/* allows only supported channel on
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* current reguatory
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*/
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+ if (n_nodfs >= num_chans)
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+ break;
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+
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if (channel == (dtoh32(list->element[j])))
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default_chan_list[n_nodfs++] =
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channel;
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@@ -9315,8 +9318,12 @@ wl_notify_pfn_status(struct bcm_cfg80211 *cfg, bcm_struct_cfgdev *cfgdev,
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struct wiphy *wiphy = bcmcfg_to_wiphy(cfg);
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#endif /* GSCAN_SUPPORT */
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- WL_ERR((">>> PNO Event\n"));
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+ if (!data) {
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+ WL_ERR(("Data is NULL!\n"));
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+ return 0;
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+ }
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+ WL_DBG((">>> PNO Event\n"));
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ndev = cfgdev_to_wlc_ndev(cfgdev, cfg);
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#ifdef GSCAN_SUPPORT
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