From: Avraham Stern <avraham.stern@xxxxxxxxx> [ Upstream commit ce038edfce43fb345f8dfdca0f7b17f535896701 ] It possible that while the rx rb is being handled, the transport has been stopped and re-started. In this case the tx queue pointer is not yet initialized, which will lead to a NULL pointer dereference. Fix it. Signed-off-by: Avraham Stern <avraham.stern@xxxxxxxxx> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@xxxxxxxxx> Link: https://msgid.link/20231207044813.cd0898cafd89.I0b84daae753ba9612092bf383f5c6f761446e964@changeid Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/pcie/rx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c index 4614acee9f7ba..586e1f860c169 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -1385,7 +1385,7 @@ static void iwl_pcie_rx_handle_rb(struct iwl_trans *trans, * if it is true then one of the handlers took the page. */ - if (reclaim) { + if (reclaim && txq) { u16 sequence = le16_to_cpu(pkt->hdr.sequence); int index = SEQ_TO_INDEX(sequence); int cmd_index = iwl_txq_get_cmd_index(txq, index); -- 2.43.0
