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 A99371773D for ; Wed, 9 Aug 2023 11:19:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27EFCC433C7; Wed, 9 Aug 2023 11:19:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691579965; bh=vvTBtE5pCtvUKuC222nnhiHNKzGu8puN9Z7cR1+aj1o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r5v8pj3MkulAmjGFIjBXjb97EPAbgDb696zsU3m8Vpm50V4Rmb0xY5aRJtjcPu0O9 Togw9f0Hw3Q+22OUFW66sWEk5ALDgt0bUsM45K97vG5qf7XH65aZsGhw5ZYpzwxYYe VOmZWULd4ibM73a7kg0LLUKw9Ps8XykX3UMljC10= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Max Filippov Subject: [PATCH 4.19 180/323] xtensa: ISS: fix call to split_if_spec Date: Wed, 9 Aug 2023 12:40:18 +0200 Message-ID: <20230809103706.388899850@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230809103658.104386911@linuxfoundation.org> References: <20230809103658.104386911@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: Max Filippov commit bc8d5916541fa19ca5bc598eb51a5f78eb891a36 upstream. split_if_spec expects a NULL-pointer as an end marker for the argument list, but tuntap_probe never supplied that terminating NULL. As a result incorrectly formatted interface specification string may cause a crash because of the random memory access. Fix that by adding NULL terminator to the split_if_spec argument list. Cc: stable@vger.kernel.org Fixes: 7282bee78798 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 8") Signed-off-by: Max Filippov Signed-off-by: Greg Kroah-Hartman --- arch/xtensa/platforms/iss/network.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/xtensa/platforms/iss/network.c +++ b/arch/xtensa/platforms/iss/network.c @@ -236,7 +236,7 @@ static int tuntap_probe(struct iss_net_p init += sizeof(TRANSPORT_TUNTAP_NAME) - 1; if (*init == ',') { - rem = split_if_spec(init + 1, &mac_str, &dev_name); + rem = split_if_spec(init + 1, &mac_str, &dev_name, NULL); if (rem != NULL) { pr_err("%s: extra garbage on specification : '%s'\n", dev->name, rem);