From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B024C200C8 for ; Tue, 20 Feb 2024 02:42:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708396968; cv=none; b=fPfXQDZtxw4iJYBwsykGDs+MlSKMBbVc9k5U4XATU1+ep/lZrPQIS4uXYJrVdz9qHPoohhmgI8nDQKBBulkrgnPal0dS4+OZAWNHT85MlKFraQ4vQkyxybL8HpzBDN2/40hUPLzNHxa3ThTruSSW552FBUS7aMKXGRmC+gSgQCw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708396968; c=relaxed/simple; bh=bPGL4DR5/T5nV7Ygj70klp3+0HEcUZ6mjR/W9tmknR0=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=RgC2CSj3BLji49zRPES9UaRQsIu+0e26UstTHdl2DTu0UYRUKaQazCW8SScBDri7kgkHr6YIQFAwOnBLmtpMspL2NrO29Y71iO1xsN8Ubds1peFoc6HIeBB1A7ZNX9SdC7GIP6eUP+PTnXEkDpjBpjX6tvPlEfaaCd6smRtdN9Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f198.google.com with SMTP id e9e14a558f8ab-3651fd50053so24875135ab.3 for ; Mon, 19 Feb 2024 18:42:46 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708396966; x=1709001766; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=cqKNwUgQARd0uzFreu8cK9Jo9mTd8aPg8U4OsgzcT1A=; b=s3QBFe+5tj9KuwXakzxfE2DpxbR3aI3BrHV1HGCpgt14PQGGFmhY6S0QGa5jHgCRHE LXB8jeXJXEN0c5d61XLSYCFVEdoSiFj+39R8gCyWU0Ef4N7HNhuXHpFv1rs1yjMYLSzP f4ZM0r8TJPDIsmgp7iBs6URRsdTFsR6v69f5wNyhwY29/ZCHwx5S6VtDjyeyfQN0UfsG QibAOtG3ue7t+5txnqNOpUVHDh/36XDYDIkVeuNm3AUivb+C5zbURD7RajNC/r9u9UK/ Sn4Dv/957hs8q/pf4ygocqZI5k3EmSI2HNUmxvsAobfIj44mC/V9VK9THRkCw+mMonob VJlQ== X-Gm-Message-State: AOJu0Yy+gsWrr4zrnQDFstQbPZU4OqHiCnDJRIZfT7URCr3cVItxDQhE 6QS6KP/WXKRpfASCT9+vtaykaJ0SphvVEDsN2nRSfvb8f5yBRaSqprawRqalE7/hNLhdXEEYEi/ zQ2dcaoTXQCi5/d1q0Gs6r5osAZUjA1xsSLGmdzoJfaBgRCZZUy7zzvQgXg== X-Google-Smtp-Source: AGHT+IGICC1BIXQWJWrKsbpNLEsu88TMyV5aehs5xeMuc5kvGoYcIAgtMNWukmen5rVI05TU8pcmmHjwVNXTQxjWdgMBHWi7MBGQ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a4f:b0:365:2f19:e597 with SMTP id u15-20020a056e021a4f00b003652f19e597mr485349ilv.5.1708396965906; Mon, 19 Feb 2024 18:42:45 -0800 (PST) Date: Mon, 19 Feb 2024 18:42:45 -0800 In-Reply-To: <0000000000002cf4690610660f71@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000049cf240611c72a13@google.com> Subject: Re: [syzbot] [PATCH net] netlink: Fix kernel-infoleak in __skb_datagram_iter() From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: [PATCH net] netlink: Fix kernel-infoleak in __skb_datagram_iter() Author: ryasuoka@redhat.com #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5bd7ef53ffe5 diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index eb086b06d60d..8277399d19b3 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -167,7 +167,7 @@ static inline u32 netlink_group_mask(u32 group) static struct sk_buff *netlink_to_full_skb(const struct sk_buff *skb, gfp_t gfp_mask) { - unsigned int len = skb_end_offset(skb); + unsigned int len = skb->len; struct sk_buff *new; new = alloc_skb(len, gfp_mask);