diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2023-06-14 12:41:25 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2023-06-19 12:05:25 +0200 |
| commit | 38e721009d302f39ad5c744560a3f96ecbae6bfc (patch) | |
| tree | 9816539a882cf71c15e85f52374a5e5dfe6ffe60 /drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c | |
| parent | c53c339d9a337732193c3b783f7bd80539fea259 (diff) | |
wifi: iwlwifi: mvm: add a NULL pointer check
We've observed that in some botched firmware restart scenarios
when the firmware crashes again while we're reconfiguring, we
can hit NULL pointer crashes here. The underlying issue is the
botched restart which we need to fix separately, but until we
can do that, don't crash hard here.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230614123446.e47b0192c78f.I67fa9f07cd1c8b3bdc8db25f5e31c1c680c49745@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c index 059ede6f7b65..954ea9ac8e5b 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* - * Copyright (C) 2012-2014, 2018-2022 Intel Corporation + * Copyright (C) 2012-2014, 2018-2023 Intel Corporation * Copyright (C) 2013-2014 Intel Mobile Communications GmbH * Copyright (C) 2015-2017 Intel Deutschland GmbH */ @@ -1111,6 +1111,10 @@ static int iwl_mvm_mac_ctxt_send_beacon_v9(struct iwl_mvm *mvm, beacon_cmd.flags = cpu_to_le16(flags); beacon_cmd.byte_cnt = cpu_to_le16((u16)beacon->len); + + if (WARN_ON(!mvmvif->link[link_conf->link_id])) + return -EINVAL; + if (iwl_fw_lookup_cmd_ver(mvm->fw, BEACON_TEMPLATE_CMD, 0) > 12) beacon_cmd.link_id = cpu_to_le32(mvmvif->link[link_conf->link_id]->fw_link_id); |