linux-kernel - [PATCH 5.6 018/106] iwlwifi: actually check allocated conf

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Date:   Fri,  1 May 2020 15:22:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chris Rorvick <chris@...vick.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 5.6 018/106] iwlwifi: actually check allocated conf_tlv pointer

From: Chris Rorvick <chris@...vick.com>

commit a176e114ace4cca7df0e34b4bd90c301cdc6d653 upstream.

Commit 71bc0334a637 ("iwlwifi: check allocated pointer when allocating
conf_tlvs") attempted to fix a typoe introduced by commit 17b809c9b22e
("iwlwifi: dbg: move debug data to a struct") but does not implement the
check correctly.

Fixes: 71bc0334a637 ("iwlwifi: check allocated pointer when allocating conf_tlvs")
Tweeted-by: @grsecurity
Signed-off-by: Chris Rorvick <chris@...vick.com>
Signed-off-by: Sedat Dilek <sedat.dilek@...il.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Link: https://lore.kernel.org/r/20200417074558.12316-1-sedat.dilek@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/intel/iwlwifi/iwl-drv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
@@ -1467,7 +1467,7 @@ static void iwl_req_fw_callback(const st
 				kmemdup(pieces->dbg_conf_tlv[i],
 					pieces->dbg_conf_tlv_len[i],
 					GFP_KERNEL);
-			if (!pieces->dbg_conf_tlv[i])
+			if (!drv->fw.dbg.conf_tlv[i])
 				goto out_free_fw;
 		}
 	}