6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
[ Upstream commit 60d62757df30b74bf397a2847a6db7385c6ee281 ]
In some versions of cfg80211, the ssids poinet might be a valid one even
though n_ssids is 0. Accessing the pointer in this case will cuase an
out-of-bound access. Fix this by checking n_ssids first.
Fixes: c1a7515393e4 ("iwlwifi: mvm: add adaptive dwell support")
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx>
Reviewed-by: Ilan Peer <ilan.peer@xxxxxxxxx>
Reviewed-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Link: https://msgid.link/20240513132416.6e4d1762bf0d.I5a0e6cc8f02050a766db704d15594c61fe583d45@changeid
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/mvm/scan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
index 03ec900a33433..0841f1d6dc475 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
@@ -1304,7 +1304,7 @@ static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
if (IWL_MVM_ADWELL_MAX_BUDGET)
cmd->v7.adwell_max_budget =
cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
- else if (params->ssids && params->ssids[0].ssid_len)
+ else if (params->n_ssids && params->ssids[0].ssid_len)
cmd->v7.adwell_max_budget =
cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
else
@@ -1406,7 +1406,7 @@ iwl_mvm_scan_umac_dwell_v11(struct iwl_mvm *mvm,
if (IWL_MVM_ADWELL_MAX_BUDGET)
general_params->adwell_max_budget =
cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
- else if (params->ssids && params->ssids[0].ssid_len)
+ else if (params->n_ssids && params->ssids[0].ssid_len)
general_params->adwell_max_budget =
cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
else
--
2.43.0
