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wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()

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The memcpy function assumes the dynamic array notif->matches is at least
as large as the number of bytes to copy. Otherwise, results->matches may
contain unwanted data. To guarantee safety, extend the validation in one
of the checks to ensure sufficient packet length.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Cc: stable@vger.kernel.org
Fixes: 5ac54afd4d ("wifi: iwlwifi: mvm: Add handling for scan offload match info notification")
Signed-off-by: Alexey Velichayshiy <a.velichayshiy@ispras.ru>
Link: https://patch.msgid.link/20260207150335.1013646-1-a.velichayshiy@ispras.ru
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Alexey Velichayshiy 2026-02-07 18:03:22 +03:00 committed by Johannes Berg
parent 6525a549ec
commit 744fabc338
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/intel/iwlwifi/mvm/d3.c
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@ -2807,7 +2807,7 @@ static void iwl_mvm_nd_match_info_handler(struct iwl_mvm *mvm,
if (IS_ERR_OR_NULL(vif))
return;
if (len < sizeof(struct iwl_scan_offload_match_info)) {
if (len < sizeof(struct iwl_scan_offload_match_info) + matches_len) {
IWL_ERR(mvm, "Invalid scan match info notification\n");
return;
}