From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 26BE53FE4 for ; Sun, 21 Jul 2024 11:37:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721561829; cv=none; b=OA9/k8LYdgb6QTc4unYXwrUPfEJj9y7jvS/U9O8NcW7AM0DLP3sFp4ZNz0WqBh5kYvHgcsk7k4+actN3pBduFFOt09KDhdOFpOHOCakx2B5UPFpnEQGP6WN1snWMnDSxg4nAKbC7U5DeNcYkFJRAU+ElCNyFdUqP16sp3P76b7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721561829; c=relaxed/simple; bh=CaKoYVXrxQ+9JPAcdKGaqOY52AKDN7sVoCePwisbqmg=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=pzEKZgjWJgb2zvdXNZz31kWRee6eCCcp12lRb1oxz/byOtIZu6ZBy7CU6BH9mNrHBfaIxreZN6P8n9kdVEry62vq0svyhqOOK30Ber9I25cCjpoBMMBGlpRNB6m6W4CbF0odSi8PQ2XZYc6DUXf3QRNTQle3jDNvYSeApt2t7Us= 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=209.85.166.72 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-io1-f72.google.com with SMTP id ca18e2360f4ac-7f92912a614so576690639f.2 for ; Sun, 21 Jul 2024 04:37:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721561827; x=1722166627; 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=fURXluOxv6X6hFtzsft1gPRQ0VYCqvZKzvY0qAYYfYY=; b=Rk/tQKnFqUebRhBXuKqoxT9wFzCAQAZDj+ZWB+mv4AvnM3OV0pS3M7BSQHYGMbdJqH +XsUqHAbEr2zFDGhLWDMBTeKqQgQCNsUPOJ/YN/3NmoZOamCmg9Cnu8h4GGGIXKB9gsm 2gxdcKCVB5L58fB3lVu+RoenaB38/VgPh3HuzKgHzc6rvdt8hUHhh49p+/B70Qq03JQz aR1D2m89YGlQj1VP4Rzcw+K9t8WrwSb2DKh/YYNwaQJ7S5kaOGWGSHfcVRTw9yGp1Ltj TfQFdoq6nHJLMKSkS6i8p0jambXI9yT4c19uLNpLP7DHXq+BMqhgEXJpnOz7pCbNas5N x2EA== X-Gm-Message-State: AOJu0YwXne3fjxVWh/jJfvVjkdQ7wf5uPkr4mu4Vs8B9lGQnRk4QojQi Kd0xQtCvd4eRtkcKAdw0LyaIP4479qqayZvP11yujYv3Ovp6TrpHYHGRstBQXzlFHf5Xrx7Wl3m 8x7BMBRhodU3KPY4clbdBUwkmpfsHq3xR3ka/7qDhNRjtJjQHoakQFEY= X-Google-Smtp-Source: AGHT+IGWsGriXBwxljaIWPj7KlMuHarpvfzZrSAHx3ynn2UGjAOBIzebiPRHa0lZHJ2QCRLDpVZqLBlGAFfTLpUVFj07gfXrOG6Q Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c28:b0:395:fa9a:318e with SMTP id e9e14a558f8ab-398e17ab520mr5363425ab.0.1721561827357; Sun, 21 Jul 2024 04:37:07 -0700 (PDT) Date: Sun, 21 Jul 2024 04:37:07 -0700 In-Reply-To: <000000000000943e1c061d92bdd6@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002dc731061dc0595d@google.com> Subject: Re: [syzbot] Re: [syzbot] [bpf?] [net?] KASAN: slab-use-after-free Read in bq_xmit_all 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: Re: [syzbot] [bpf?] [net?] KASAN: slab-use-after-free Read in bq_xmit_all Author: aha310510@gmail.com #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master --- kernel/bpf/devmap.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index 9e0e3b0a18e4..5e2ee97ad09f 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -378,7 +378,9 @@ static void bq_xmit_all(struct xdp_dev_bulk_queue *bq, u32 flags) int to_send = cnt; int i; - if (unlikely(!cnt)) + printk(KERN_INFO "bq->count = %u\n",cnt); + + if (unlikely(!cnt) || unlikely(cnt) > DEV_MAP_BULK_SIZE) return; for (i = 0; i < cnt; i++) { --