From patchwork Thu Mar 4 15:21:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Skripkin X-Patchwork-Id: 12116497 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EEA8DC4332B for ; Thu, 4 Mar 2021 15:26:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AED3964FB0 for ; Thu, 4 Mar 2021 15:26:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234174AbhCDP0N (ORCPT ); Thu, 4 Mar 2021 10:26:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46508 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232758AbhCDPZv (ORCPT ); Thu, 4 Mar 2021 10:25:51 -0500 Received: from mail-lf1-x131.google.com (mail-lf1-x131.google.com [IPv6:2a00:1450:4864:20::131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 42885C061756; Thu, 4 Mar 2021 07:25:11 -0800 (PST) Received: by mail-lf1-x131.google.com with SMTP id q25so23608421lfc.8; Thu, 04 Mar 2021 07:25:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=aeN2LKdORXb0lZrwnrlpd8qrBTJtdHVZ+ffDq501Us8=; b=i+DknTjhTVuXq7MZUlypiuq2JeQK4/edGuiLVDG8YUHG3exXaY/yG8yLBtjp1r6zwu xBCfPXSbY5SpQFOAV5/at+WrDVti0dDvr/nmHTeoNuGKcqwQTb9WyzERXzyjKwjcl65l bTmQDbzaUFJFusDofGxg4vdMrRxa5XT2maO4+dFgSbuV8fXD9kp+tFctJm2jhtYsdp7W S8HGt333upLNPULnrmgk55nDQT+Ij37chqPpzuj2xfYsTNts9Ah1/lAAoP+MbP4uovbN BtesAzVJ/OW95zoaLiVJFxkR9KR5PuhF2TfQQ1sDbD9+wBteNpPr1N8wmkUkzBIOYP2f PcBA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=aeN2LKdORXb0lZrwnrlpd8qrBTJtdHVZ+ffDq501Us8=; b=KDS8v07OXXQ0s/HyfICTfv67Dec+R++3AFUSrhmcPFgFmAmwfgp0gA/93V2i7IYDCE BS9RbAlaO+d2/5RP+PdvkCGTRL+i/hl+lGI3NmjUfhYMSEppvEJOntZqzeO0gb4NYYZb lBrsOuRzCluPryJ4v3uvLUYMPRMDpOGQTFyhUCyxgcRpCr+vM+aQkgx8uSV0DHY0+hgs EWQyyUqj64/adoumDVSPtrcFsXPGCvk6X8pYvLwM6XSuzEwZhCS3fslkxziXX8QD5DiK ZGVRRK1DA7a1f1YdBHxpxCMvGTWMxNapcfxjGEFiO9nLSj1pxH6j8W8ukKM8S4YKZiF7 ZKtQ== X-Gm-Message-State: AOAM533QFicX6Hs3i8oh3nl4uIl+M9DcJLX8nDIsSt5SlQZ8gFaDmuiU 39pwL41ZETDtZmRionxbLbv64X2gtMFJDNTVGak= X-Google-Smtp-Source: ABdhPJwKMUQh9PtBYqbGI/8c5OxKmNVwr0F+4JArX5VTcw9L9vOFzh/5/DLlV1N2jv4ludGo8Dkv0w== X-Received: by 2002:a05:6512:906:: with SMTP id e6mr2644644lft.224.1614871509714; Thu, 04 Mar 2021 07:25:09 -0800 (PST) Received: from localhost.localdomain ([94.103.235.167]) by smtp.gmail.com with ESMTPSA id d8sm467647ljc.129.2021.03.04.07.25.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Mar 2021 07:25:09 -0800 (PST) From: Pavel Skripkin To: alex.aring@gmail.com, stefan@datenfreihafen.org, davem@davemloft.net Cc: linux-wpan@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Pavel Skripkin , syzbot+9ec037722d2603a9f52e@syzkaller.appspotmail.com Subject: [PATCH v2] net: mac802154: Fix general protection fault Date: Thu, 4 Mar 2021 18:21:25 +0300 Message-Id: <20210304152125.1052825-1-paskripkin@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org syzbot found general protection fault in crypto_destroy_tfm()[1]. It was caused by wrong clean up loop in llsec_key_alloc(). If one of the tfm array members is in IS_ERR() range it will cause general protection fault in clean up function [1]. Call Trace: crypto_free_aead include/crypto/aead.h:191 [inline] [1] llsec_key_alloc net/mac802154/llsec.c:156 [inline] mac802154_llsec_key_add+0x9e0/0xcc0 net/mac802154/llsec.c:249 ieee802154_add_llsec_key+0x56/0x80 net/mac802154/cfg.c:338 rdev_add_llsec_key net/ieee802154/rdev-ops.h:260 [inline] nl802154_add_llsec_key+0x3d3/0x560 net/ieee802154/nl802154.c:1584 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Signed-off-by: Pavel Skripkin Reported-by: syzbot+9ec037722d2603a9f52e@syzkaller.appspotmail.com Change-Id: I29f7ac641a039096d63d1e6070bb32cb5a3beb07 Acked-by: Alexander Aring --- net/mac802154/llsec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/mac802154/llsec.c b/net/mac802154/llsec.c index 585d33144c33..55550ead2ced 100644 --- a/net/mac802154/llsec.c +++ b/net/mac802154/llsec.c @@ -152,7 +152,7 @@ llsec_key_alloc(const struct ieee802154_llsec_key *template) crypto_free_sync_skcipher(key->tfm0); err_tfm: for (i = 0; i < ARRAY_SIZE(key->tfm); i++) - if (key->tfm[i]) + if (!IS_ERR_OR_NULL(key->tfm[i])) crypto_free_aead(key->tfm[i]); kfree_sensitive(key);