From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 A880F2BAEA for ; Tue, 19 Mar 2024 18:11:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710871889; cv=none; b=OnEwN738jt8IWZposhKz3PsTa+iDThz7FLE5+qzEfvXy1BjVrJJTAbH9YSI7O0oKlp88ci3LusakY3p1s1A8dYCS1sA9+56GI+1/s/UlvWgcyK4zlSeKrvrw1nwxp0W4p5wNhaMHZNtrVR+O0y626NcCLjE3Q7c9p4PSQslgBxY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710871889; c=relaxed/simple; bh=tiGL1NHxk39qgpzX58WM7MKSdnmnH6vTVN+JwmMZD6g=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=GbM07rAY4SBjs2//8xjvLVo5zUwZ0ywgkM0D6E7XtsS2F6F+h51CwtYtv0WugPGEXEL8MjjkeKrlehnb+kPEuwlmOYvwicJq6FiCEXHQQfqt8hses1XcrTXdafstEWxQTHZDyk4ty4hBbX3FGBprUMY96uv7DoUY2Hsk5cZu3Qo= 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=209.85.166.199 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-f199.google.com with SMTP id e9e14a558f8ab-366ada2afc6so28793715ab.0 for ; Tue, 19 Mar 2024 11:11:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710871887; x=1711476687; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=4FGA3Q/Jsb5iylMpt4gm0U57kMlr8EgSfuZyJGPJfJk=; b=vSoFq9hcsAC/TqHNgKBAo2XSWkx6nQftfGHEnNX0vQP+UbCWBijYSXCQZ7PjiJtz28 t3DjOBJcs+eVhxr9qBsy1pgL2cLdqch/ODYGP0CumDfvsbBV39C5YYyvDCk0riKgQjbi mRay4dRJTLSNLfXPFXHt2zW2lg+fugcF9F1F8sthSmBCQRsl+DfB4Otc1BLE7rXUkuLX Uc+cn9pxarEXXikEG8uDB6ug9XmDrUyGAA0ubg3XmnXddwdWQiO+ZupqPCuiKYVZRoXQ 8PBgO7r3TrleDXFPjigdGmy/BFlxK0kb+jwWlBAV+kT957KHJtmKZfR73QiaMdNY0RjJ EMCw== X-Forwarded-Encrypted: i=1; AJvYcCVxuQwkELnOj9l7kA2Z6luvdYslNfomgY9jBbZnEx7MyKaZQty1XztzTlkcW+DG4ShoMq7O330HfppVwNtkBEBRpAYw X-Gm-Message-State: AOJu0YxZv1kagfQMBwpqDUvMLgB523zlMg7Kl+m2/bk1W/E6pp5juT1+ FzfTTYozftffOkvVRqfB1oZq3M/oVmTbbP4qYvInoD6YtGDXiRjjod3Xzk9fdBpj+p/Trpsdp8e DQT9d6uwlalji2ZDIUqLTYWqN4N3UlVXz5heerOrv/xG7hpDa2HCVTE0= X-Google-Smtp-Source: AGHT+IFmFGl290mOUiju8BeiMLuWxemiwm3OHI1KQCej6a3+CV9O/BljYHG38jI0cLAM186qzncQTYeAY5huH5cRFpHkhyemTZ+b Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:360a:0:b0:366:9ead:645b with SMTP id d10-20020a92360a000000b003669ead645bmr343659ila.1.1710871886800; Tue, 19 Mar 2024 11:11:26 -0700 (PDT) Date: Tue, 19 Mar 2024 11:11:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000011b2f00614076749@google.com> Subject: [syzbot] [bpf?] KMSAN: uninit-value in __bpf_strtoull From: syzbot To: 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, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 741e9d668aa5 Merge tag 'scsi-misc' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=113721f1180000 kernel config: https://syzkaller.appspot.com/x/.config?x=48bb382b96e7eda7 dashboard link: https://syzkaller.appspot.com/bug?extid=8ac8b7b2292ea867a162 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7e1776e6e382/disk-741e9d66.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/69580881d554/vmlinux-741e9d66.xz kernel image: https://storage.googleapis.com/syzbot-assets/65e4047a1117/bzImage-741e9d66.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] __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xba/0x120 arch/x86/entry/common.c:321 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:346 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384 entry_SYSENTER_compat_after_hwframe+0x7a/0x84 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: 0 PID: 11097 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-11339-g741e9d668aa5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup