From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80F37C4332F for ; Tue, 7 Dec 2021 17:36:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240062AbhLGRkA (ORCPT ); Tue, 7 Dec 2021 12:40:00 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:46665 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240058AbhLGRkA (ORCPT ); Tue, 7 Dec 2021 12:40:00 -0500 Received: by mail-il1-f200.google.com with SMTP id j15-20020a056e02218f00b0029e3db8d6dfso12538433ila.13 for ; Tue, 07 Dec 2021 09:36:29 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=1dQvezvp3iGWZ0YIb75qsQGcY3DEG/a8kpN3taG3XIQ=; b=RnKisshrMbmc1ozWLm60rxQfFnDl2Gj87lfO5IayypxJ9aDFZJPOmwh+2GSBenwt0b zj/qVapwg2O61pZNU89Huk9DJVYO3ds1U8OdgYWwaA94ve7+dPf7CtCaM42SBZex5qTw J1sRY+GSg91hVKjpan5uMmGzLfbPz6TfDCmN0owk6bhgGxZwqIhwwE71ZKY3+M8Da9fM bkxW74n/E/zIhRKZXqi3tmGOF7gWcyAUwGpjSeTONUHbYzLhpP8F8PWYmIwzrvlbC1fn Q65419BhhWVxwSngzXl9+YbOy31Lhq91Pb8NOf4ijS3P8j27zAaZCRogOY4d1xK6dQg/ UOTA== X-Gm-Message-State: AOAM53361OZYZhX8hH+rUldYcFrKs9p3QYn/qUqm1L1xDHWQI1OKsrzu Lpl3TwcizFbNiyTs1lqnuwlKZctv/Vo8mWNAeoscUSEIuv8C X-Google-Smtp-Source: ABdhPJxrY5ezv1MAc4b3hmpC2DiyVCa1ZBCuumVI4l2wVqyLJVseDqkqWYesgOImWu3+rPfrjLJrTeEt9WFpybMUWdvQ/3svPH4Z MIME-Version: 1.0 X-Received: by 2002:a05:6e02:16ca:: with SMTP id 10mr721658ilx.274.1638898589332; Tue, 07 Dec 2021 09:36:29 -0800 (PST) Date: Tue, 07 Dec 2021 09:36:29 -0800 In-Reply-To: <000000000000367c2205d2549cb9@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003d78f805d291d061@google.com> Subject: Re: [syzbot] KASAN: vmalloc-out-of-bounds Read in __bpf_prog_put From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, hawk@kernel.org, john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: 1c5526968e27 net/smc: Clear memory when release and reuse .. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=13a9eabdb00000 kernel config: https://syzkaller.appspot.com/x/.config?x=2b8e24e3a80e3875 dashboard link: https://syzkaller.appspot.com/bug?extid=5027de09e0964fd78ce1 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12b749a9b00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=170d7519b00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5027de09e0964fd78ce1@syzkaller.appspotmail.com ================================================================== BUG: KASAN: vmalloc-out-of-bounds in __bpf_prog_put.constprop.0+0x1dd/0x220 kernel/bpf/syscall.c:1812 Read of size 8 at addr ffffc90001a16038 by task kworker/0:3/2934 CPU: 0 PID: 2934 Comm: kworker/0:3 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events sk_psock_destroy Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xf/0x320 mm/kasan/report.c:247 __kasan_report mm/kasan/report.c:433 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:450 __bpf_prog_put.constprop.0+0x1dd/0x220 kernel/bpf/syscall.c:1812 psock_set_prog include/linux/skmsg.h:477 [inline] psock_progs_drop include/linux/skmsg.h:495 [inline] sk_psock_destroy+0xad/0x620 net/core/skmsg.c:804 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Memory state around the buggy address: ffffc90001a15f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90001a15f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffffc90001a16000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90001a16080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90001a16100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================