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wifi: iwlwifi: pcie: avoid a NULL pointer dereference

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[ Upstream commit ce038edfce ]

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.I0b84daae753ba9612092bf383f5c6f761446e964@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Avraham Stern 2023-12-07 04:50:17 +02:00 committed by Greg Kroah-Hartman
parent fd13543dbb
commit d66ffc87ba
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wireless/intel/iwlwifi/pcie/rx.c
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@ -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);