From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1CC86168CF for ; Mon, 8 May 2023 11:16:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8063CC433D2; Mon, 8 May 2023 11:16:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683544566; bh=37Et6PbHvCGIsocBUxddF/q1eEzwLg/W60V58U66AO8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LrUjJIrm5kSODaaYrjvL8VR0t/+THLj6CqvBFDoR45cEl4EcOC1NkLTG4cw338rH0 I2L2wym4IoXS0wX9TH1wyHNsvU/0JkB8iPq5sWkcYRpJOsbKnEND+TY4akrcKbklnE s+OxVOswqJGgAKYTW+ioonQNmfpEHSrZN0tK66e4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johannes Berg , Gregory Greenman , Sasha Levin Subject: [PATCH 6.3 411/694] wifi: iwlwifi: debug: fix crash in __iwl_err() Date: Mon, 8 May 2023 11:44:06 +0200 Message-Id: <20230508094446.585522575@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094432.603705160@linuxfoundation.org> References: <20230508094432.603705160@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Johannes Berg [ Upstream commit 634c7b1bd08ca322537ab389f8cbd7bb543b5e45 ] In __iwl_err(), if we rate-limit the message away, then vaf.va is still NULL-initialized by the time we get to the tracing code, which then crashes. When it doesn't get rate-limited out, it's still wrong to reuse the old args2 that was already printed, which is why we bother making a copy in the first place. Assign vaf.va properly to fix this. Fixes: e5f1cc98cc1b ("iwlwifi: allow rate-limited error messages") Signed-off-by: Johannes Berg Signed-off-by: Gregory Greenman Link: https://lore.kernel.org/r/20230413102635.e27134c6bcd4.Ib3894cd2ba7a5ad5e75912a7634f146ceaa569e2@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- drivers/net/wireless/intel/iwlwifi/iwl-debug.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-debug.c b/drivers/net/wireless/intel/iwlwifi/iwl-debug.c index ae4c2a3d63d5b..3a3c13a41fc61 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-debug.c +++ b/drivers/net/wireless/intel/iwlwifi/iwl-debug.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* - * Copyright (C) 2005-2011, 2021 Intel Corporation + * Copyright (C) 2005-2011, 2021-2022 Intel Corporation */ #include #include @@ -57,6 +57,7 @@ void __iwl_err(struct device *dev, enum iwl_err_mode mode, const char *fmt, ...) default: break; } + vaf.va = &args; trace_iwlwifi_err(&vaf); va_end(args); } -- 2.39.2