From: Avraham Stern avraham.stern@intel.com
[ 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@intel.com Signed-off-by: Miri Korenblit miriam.rachel.korenblit@intel.com Link: https://msgid.link/20231207044813.cd0898cafd89.I0b84daae753ba9612092bf383f5c... Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 df201d40f6c95..92f14ea13a573 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/rx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/rx.c @@ -1380,7 +1380,7 @@ 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);