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50 lines
2.5 KiB
Diff
50 lines
2.5 KiB
Diff
From ed6814c11abf9f96d4060b2825c50842ef83bdba Mon Sep 17 00:00:00 2001
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From: Jeff Johnson <jjohnson@codeaurora.org>
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Date: Tue, 6 Jun 2017 08:56:33 -0700
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Subject: [PATCH] qcacld-2.0: Avoid extscan bucket spec overread
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Currently in hdd_extscan_start_fill_bucket_channel_spec() the
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QCA_WLAN_VENDOR_ATTR_EXTSCAN_BUCKET_SPEC attribute is parsed without
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specifying a policy. This means that no policy is enforced.
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Subsequently the values of the nested attributes are retrieved, but
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again without any length limits enforced. This could result in a
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buffer overread.
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To prevent this issue:
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* Parse using the existing policy wlan_hdd_extscan_config_policy
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* Update the policy to add missing attributes
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Bug: 36730104
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Change-Id: I3b20cb28d1beccd2e804b022b531413ad1edb533
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CRs-Fixed: 2057034
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Signed-off-by: Ecco Park <eccopark@google.com>
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---
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drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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diff --git a/drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c b/drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c
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index 5ca269bab9cf6..da139cf225ce2 100644
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--- a/drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c
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+++ b/drivers/staging/qcacld-2.0/CORE/HDD/src/wlan_hdd_cfg80211.c
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@@ -845,6 +845,9 @@ wlan_hdd_extscan_config_policy[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SIGNIFICANT_CHANGE_PARAMS_LOST_AP_SAMPLE_SIZE] = { .type = NLA_U32 },
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SIGNIFICANT_CHANGE_PARAMS_MIN_BREACHING] = { .type = NLA_U32 },
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SIGNIFICANT_CHANGE_PARAMS_NUM_AP] = { .type = NLA_U32 },
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+ [QCA_WLAN_VENDOR_ATTR_EXTSCAN_BUCKET_SPEC_MAX_PERIOD] = { .type = NLA_U32 },
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+ [QCA_WLAN_VENDOR_ATTR_EXTSCAN_BUCKET_SPEC_BASE] = { .type = NLA_U32 },
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+ [QCA_WLAN_VENDOR_ATTR_EXTSCAN_BUCKET_SPEC_STEP_COUNT] = { .type = NLA_U32 },
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SSID_THRESHOLD_PARAM_SSID] = { .type = NLA_BINARY,
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.len = IEEE80211_MAX_SSID_LEN + 1 },
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[QCA_WLAN_VENDOR_ATTR_EXTSCAN_SSID_HOTLIST_PARAMS_LOST_SSID_SAMPLE_SIZE] = { .type = NLA_U32 },
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@@ -3448,8 +3451,9 @@ static int hdd_extscan_start_fill_bucket_channel_spec(
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}
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if (nla_parse(bucket,
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- QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_MAX,
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- nla_data(buckets), nla_len(buckets), NULL)) {
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+ QCA_WLAN_VENDOR_ATTR_EXTSCAN_SUBCMD_CONFIG_PARAM_MAX,
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+ nla_data(buckets), nla_len(buckets),
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+ wlan_hdd_extscan_config_policy)) {
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hddLog(LOGE, FL("nla_parse failed"));
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return -EINVAL;
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}
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