Patch "iwlwifi: mvm: properly check for transport data in dump" has been added to the 4.10-stable tree

Patch "iwlwifi: mvm: properly check for transport data in dump" has been added to the 4.10-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    iwlwifi: mvm: properly check for transport data in dump

to the 4.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     iwlwifi-mvm-properly-check-for-transport-data-in-dump.patch
and it can be found in the queue-4.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c2e27e16f2411155b906db201b7e478144034ffe Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Thu, 20 Oct 2016 15:25:00 +0200
Subject: iwlwifi: mvm: properly check for transport data in dump

From: Johannes Berg <johannes.berg@intel.com>

commit c2e27e16f2411155b906db201b7e478144034ffe upstream.

When copying from vmalloc'ed memory to the SG list, don't crash
if the transport didn't provide any data.

Fixes: 7e62a699aafb ("iwlwifi: mvm: use dev_coredumpsg()")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c |   11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

--- a/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/fw-dbg.c
@@ -816,11 +816,12 @@ dump_trans_data:
 				     sg_nents(sg_dump_data),
 				     fw_error_dump->op_mode_ptr,
 				     fw_error_dump->op_mode_len, 0);
-		sg_pcopy_from_buffer(sg_dump_data,
-				     sg_nents(sg_dump_data),
-				     fw_error_dump->trans_ptr->data,
-				     fw_error_dump->trans_ptr->len,
-				     fw_error_dump->op_mode_len);
+		if (fw_error_dump->trans_ptr)
+			sg_pcopy_from_buffer(sg_dump_data,
+					     sg_nents(sg_dump_data),
+					     fw_error_dump->trans_ptr->data,
+					     fw_error_dump->trans_ptr->len,
+					     fw_error_dump->op_mode_len);
 		dev_coredumpsg(mvm->trans->dev, sg_dump_data, file_len,
 			       GFP_KERNEL);
 	}


Patches currently in stable-queue which might be from johannes.berg@intel.com are

queue-4.10/iwlwifi-mvm-properly-check-for-transport-data-in-dump.patch
queue-4.10/iwlwifi-mvm-overwrite-skb-info-later.patch
queue-4.10/iwlwifi-mvm-pcie-adjust-a-msdu-tx_cmd-length-in-pcie.patch