From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) (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 3289137160 for ; Fri, 29 Mar 2024 02:59:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711681163; cv=none; b=VAc7v9dW9K4wjB3PubNhavQr3id1q5VohW1NmKpKramttMiFkdNIp62RGMMxpu9hx+iodPuNWTjbYlqRHBWzv+qK06ATmqs5TLKSX/ed3LZysfo95LF3tdosfvgUJS5iy5oPpSbuhPcgL4nJdPHYHMAmMGjIXs7L9CfZcPWrd5Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711681163; c=relaxed/simple; bh=dGtETsdt0QT/4xvEP76pejvB7FB1g2easUs9qA8vpVk=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=SW1KedaWfki4KavNoaAfmnVikO04cev/DhyoanX0eWK6uqMM0HQgkWGlBfYwlp/bKvArHtXNC5XcARKA0IYc9jqTA7BUd8oKAeifWgFteYi3GvUxCj7PzBHthHJU8yJc9J1Bqb+WsXwBQZa5v2rxO6T01Nuvx8yH5ERKkunooo8= 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=209.85.166.69 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-f69.google.com with SMTP id ca18e2360f4ac-7cf265b30e2so151058539f.1 for ; Thu, 28 Mar 2024 19:59:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711681161; x=1712285961; 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=6n7QmXOvYboAd7Cq7lfplGqLO69ROJHflHj1c62Ec4U=; b=eN7frTpLirswBYCji7jq/U8WtWmHvUd2btjFo5GjKr9vsgFxz7J1apsBCILKK43neR KA4K6jTwilJPrS57j0P8Sj7KLyduZfIaqhlR8ZwP54ENnKJLN/HQwGvYPONxaBbwbqaz ghbLkDh4iurp/Kvcc/yZoaqVWYhZUfbu/OFr8/4LKdc0uzUmvmS5ocIksjr9XkYehI8s nu2kW6XBXfsUv//B3X+JQ+QAYZ2g9eq9BqL76sCiRwCLKzRAcS/Gx1CepUOkoDlHkwLw pm75th9K7LjrcHQqxfzY17UCk7MkQBwCxwUoLwDdMDzL52DwLEDt2pBtsN/tz2wDW3Og g+AA== X-Forwarded-Encrypted: i=1; AJvYcCWX9yiKK3c6zz+QjY5EpSWQW2VukpHJu0R7BuHLUM6V7PPZt4WAjne2nbFoyVTKJPoa7nXrMjYbJDcxOIrz5zMqbGxJxQDQr9Gueplo X-Gm-Message-State: AOJu0YxJ93Cpn6wHz2VT+zLo/uqEbltAW+sNZUXqJkQd42gwZqLzQbqC gtx0PTnPzJ2uhZw8MCZXVO3w8lECA6YrNlieqyJYnhwrTNU6lZCofirGdxCf69/Yp2FhYAJvtxI rSb1GYR+RsuuC4RTCGykREz1/7AXW4lZdQVVtJ5ee77x1zqBDjl4YjXg= X-Google-Smtp-Source: AGHT+IGolnO7oOOyMon/XNOqd2HDi6/YkPAAhYiO/AndRNtsW+20fOtvMU0XJp762Ja0wcdLnnnlR/MH80jR7+0s7mokZjDFOJb1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:378d:b0:47e:d028:3eff with SMTP id w13-20020a056638378d00b0047ed0283effmr21880jal.2.1711681161467; Thu, 28 Mar 2024 19:59:21 -0700 (PDT) Date: Thu, 28 Mar 2024 19:59:21 -0700 In-Reply-To: <00000000000011b2f00614076749@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009925b60614c3d39d@google.com> Subject: Re: [syzbot] [bpf?] KMSAN: uninit-value in __bpf_strtoull From: syzbot To: alexei.starovoitov@gmail.com, andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, samsun1006219@gmail.com, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com, xrivendell7@gmail.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 8d025e2092e2 Merge tag 'erofs-for-6.9-rc2-fixes' of git://.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10f2ffe6180000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2599baf258ef795 dashboard link: https://syzkaller.appspot.com/bug?extid=8ac8b7b2292ea867a162 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b3ac29180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=160153c9180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5ccde1a19e22/disk-8d025e20.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/45420817e7d9/vmlinux-8d025e20.xz kernel image: https://storage.googleapis.com/syzbot-assets/354bdafd8c8f/bzImage-8d025e20.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8ac8b7b2292ea867a162@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in __bpf_strtoull+0x245/0x5b0 kernel/bpf/helpers.c:465 __bpf_strtoull+0x245/0x5b0 kernel/bpf/helpers.c:465 __bpf_strtoll kernel/bpf/helpers.c:504 [inline] ____bpf_strtol kernel/bpf/helpers.c:525 [inline] bpf_strtol+0x7c/0x270 kernel/bpf/helpers.c:519 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997 __bpf_prog_run96+0xb5/0xe0 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run_xdp include/net/xdp.h:514 [inline] bpf_test_run+0x43e/0xc30 net/bpf/test_run.c:423 bpf_prog_test_run_xdp+0xeaa/0x1a40 net/bpf/test_run.c:1269 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4240 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5649 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline] __se_sys_bpf kernel/bpf/syscall.c:5736 [inline] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736 do_syscall_64+0xd5/0x1f0 entry_SYSCALL_64_after_hwframe+0x6d/0x75 Local variable stack created at: __bpf_prog_run96+0x45/0xe0 kernel/bpf/core.c:2236 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run_xdp include/net/xdp.h:514 [inline] bpf_test_run+0x43e/0xc30 net/bpf/test_run.c:423 CPU: 1 PID: 5019 Comm: syz-executor335 Not tainted 6.9.0-rc1-syzkaller-00061-g8d025e2092e2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ===================================================== --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.