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61 lines
2.3 KiB
Diff
61 lines
2.3 KiB
Diff
From 08ccf853c567bf02f4a5c9f9aef19a40ecdf57d1 Mon Sep 17 00:00:00 2001
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From: Insun Song <insun.song@broadcom.com>
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Date: Mon, 5 Jun 2017 14:39:26 -0700
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Subject: net: wireless: bcmdhd: adding boundary check for pfn events
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adding boundary check for bssid count in dhd_pno_process_epno_result
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and dhd_handle_hotlist_scan_evt function to prevent heap overflow.
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Signed-off-by: Insun Song <insun.song@broadcom.com>
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Bug: 37722328
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Bug: 37722970
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Change-Id: I1f0bc25ef4e7f5ba8f1aa9d9271919ee84d780a1
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---
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drivers/net/wireless/bcmdhd/dhd_pno.c | 16 ++++++++++++++--
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1 file changed, 14 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 8ebdf53..1a8e4ee 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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@@ -92,6 +92,11 @@
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#define ENTRY_OVERHEAD strlen("bssid=\nssid=\nfreq=\nlevel=\nage=\ndist=\ndistSd=\n====")
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#define TIME_MIN_DIFF 5
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+#define EVENT_DATABUF_MAXLEN (512 - sizeof(bcm_event_t))
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+#define EVENT_MAX_NETCNT \
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+ ((EVENT_DATABUF_MAXLEN - sizeof(wl_pfn_scanresults_t)) \
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+ / sizeof(wl_pfn_net_info_t) + 1)
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+
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#ifdef GSCAN_SUPPORT
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static int _dhd_pno_flush_ssid(dhd_pub_t *dhd);
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static wl_pfn_gscan_ch_bucket_cfg_t *
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@@ -3575,7 +3580,12 @@ dhd_pno_process_epno_result(dhd_pub_t *dhd, const void *data, uint32 event, int
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if (event == WLC_E_PFN_NET_FOUND || event == WLC_E_PFN_NET_LOST) {
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wl_pfn_scanresults_t *pfn_result = (wl_pfn_scanresults_t *)data;
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wl_pfn_net_info_t *net;
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-
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+ if ((pfn_result->count == 0) ||
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+ (pfn_result->count > EVENT_MAX_NETCNT)) {
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+ DHD_ERROR(("%s event %d: incorrect results count:%d\n",
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+ __FUNCTION__, event, pfn_result->count));
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+ return NULL;
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+ }
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if (pfn_result->version != PFN_SCANRESULT_VERSION) {
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DHD_ERROR(("%s event %d: Incorrect version %d %d\n", __FUNCTION__, event,
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pfn_result->version, PFN_SCANRESULT_VERSION));
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@@ -3690,7 +3700,9 @@ void *dhd_handle_hotlist_scan_evt(dhd_pub_t *dhd, const void *event_data, int *s
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gscan_params = &(_pno_state->pno_params_arr[INDEX_OF_GSCAN_PARAMS].params_gscan);
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- if (!results->count) {
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+ if ((results->count == 0) || (results->count > EVENT_MAX_NETCNT)) {
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+ DHD_ERROR(("%s: wrong count:%d\n", __FUNCTION__,
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+ results->count));
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*send_evt_bytes = 0;
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return ptr;
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}
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--
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cgit v1.1
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