From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f78.google.com (mail-io1-f78.google.com [209.85.166.78]) (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 E9A0D61FC1 for ; Sat, 15 Jun 2024 19:43:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718480600; cv=none; b=iCaXYlMK5CO2o3rc3LAbFWlNVkD2yhbaJyT6yYtnapsehMwqlkudNtHCg9LlllZe6AEkqIUDix87qWEUeF+U2mfbYHt7/mG+NBjpdpjVB/GfuMM+S8M0ZPgeSgD74GDW/15olyR7I3qb9DUdATZPoMMkKoZ6XRgaus8Ds8v239Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718480600; c=relaxed/simple; bh=c6pOMN0SBvY/UZhCBHHqYwuAVyKrR30GSxBlwKk/OeE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=eQoRL6Nb7jrZF3YhpgY73S/qh7bbz0kYSTLdGni+iytBEUV7/xAy6tyHNEK+yBOs/LgQW5D9EHdSRFjqDJ0dFZzvnOJn2GQugSOgT4kyPSwf32ApcR3sGv4uJnGDytg7PC7XgCokEGzvhLQPie3mHGL5MXc8BokW+ckUXNjZgYo= 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=209.85.166.78 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-f78.google.com with SMTP id ca18e2360f4ac-7eb84511dbfso333215739f.3 for ; Sat, 15 Jun 2024 12:43:18 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718480598; x=1719085398; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=2k9+PA/DbbkrN8dmf4cZVGncJCQWsxaojMXNBQZYdZk=; b=N+mBDHejDQSfgnAt6Yv4I5qW/7vNu3v4Z4/uaV83+tj+/+MjgSfgcJVldCBAYr1XIp Z98cUr8JY+OsVJFvrRMmODy19nSeAxE8mhdvjs3yC8AXvxXoedmVc6pV7q3vNBLIK+15 km5BMCb7TgiLYJRFKekAem3hUZdFX8fmVd3YgvLGdT9V3KO6Ajne6lbtBSZLcy4cODHk LO64kjjzVJR2R3Fdxd1ZlEs7hHBtnulyM8vj/uPr58emKa+E4gWL5dSrvqeZNQE9bg8s Oy8pO3RzH11PtojfUBVTcxZ8tQcJjYhrPd7/ybX8CKgI+9FRkxyC7wLgQSwFeohp3uL0 hTIg== X-Forwarded-Encrypted: i=1; AJvYcCUWhErsRh+vizv8nneX2aGrQ2Lh2vMA8quAQJUEimCLGC4+dLoHbLa85hSSali5YhSteTJj8WF7t+LntSaeOsZ4WXzEY4RtPzDqPQQ= X-Gm-Message-State: AOJu0YxGS6PslWyA5ojWRwmRyp/3dcA1+glqlQ8F+TnEoj06hd5LWD4Y /Q8ekN4F0bMFkEK7FxteeA587iulhnKXKUx9ygmoBvfKRnSefVXv1sazwZnqCkAzoltj6I6tZII MEPnCGcI06i5dDx0ODO/E3ZBbY7bf7iD/9xUFPWflGNSsXCyzSr5uHvY= X-Google-Smtp-Source: AGHT+IEE+zQ6jRoRogixEwKQRl6ZJiIqwZVCx8V+lvnuxuOjj7QAVdQrq4qyBmcoEAA2DrjOoIz/KEk6hfAuYcfEwDM4vSpF1GM2 Precedence: bulk X-Mailing-List: linux-nilfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:14c6:b0:4b9:32f8:574f with SMTP id 8926c6da1cb9f-4b9640dbfcamr244847173.5.1718480597992; Sat, 15 Jun 2024 12:43:17 -0700 (PDT) Date: Sat, 15 Jun 2024 12:43:17 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000098d783061af2f133@google.com> Subject: [syzbot] [nilfs?] KMSAN: uninit-value in nilfs_add_checksums_on_logs (3) From: syzbot To: konishi.ryusuke@gmail.com, linux-kernel@vger.kernel.org, linux-nilfs@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 614da38e2f7a Merge tag 'hid-for-linus-2024051401' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12d26ada980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f5d2cbf33633f507 dashboard link: https://syzkaller.appspot.com/bug?extid=206133fb2e7b32bba4be compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/89eafb874b71/disk-614da38e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/356000512ad9/vmlinux-614da38e.xz kernel image: https://storage.googleapis.com/syzbot-assets/839c73939115/bzImage-614da38e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+206133fb2e7b32bba4be@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in crc32_body lib/crc32.c:110 [inline] BUG: KMSAN: uninit-value in crc32_le_generic lib/crc32.c:179 [inline] BUG: KMSAN: uninit-value in crc32_le_base+0x43c/0xd80 lib/crc32.c:197 crc32_body lib/crc32.c:110 [inline] crc32_le_generic lib/crc32.c:179 [inline] crc32_le_base+0x43c/0xd80 lib/crc32.c:197 nilfs_segbuf_fill_in_data_crc fs/nilfs2/segbuf.c:224 [inline] nilfs_add_checksums_on_logs+0xb80/0xe40 fs/nilfs2/segbuf.c:327 nilfs_segctor_do_construct+0x9876/0xdeb0 fs/nilfs2/segment.c:2078 nilfs_segctor_construct+0x1eb/0xe30 fs/nilfs2/segment.c:2381 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2489 [inline] nilfs_segctor_thread+0xc50/0x11e0 fs/nilfs2/segment.c:2573 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: memcpy_from_iter lib/iov_iter.c:73 [inline] iterate_bvec include/linux/iov_iter.h:122 [inline] iterate_and_advance2 include/linux/iov_iter.h:249 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] __copy_from_iter lib/iov_iter.c:249 [inline] copy_page_from_iter_atomic+0x12b7/0x2ae0 lib/iov_iter.c:481 generic_perform_write+0x4c1/0xc60 mm/filemap.c:3982 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4069 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4095 __kernel_write_iter+0x64d/0xc80 fs/read_write.c:523 dump_emit_page fs/coredump.c:895 [inline] dump_user_range+0x8dc/0xee0 fs/coredump.c:956 elf_core_dump+0x57c7/0x5ae0 fs/binfmt_elf.c:2083 do_coredump+0x32d5/0x4920 fs/coredump.c:769 get_signal+0x267e/0x2d00 kernel/signal.c:2896 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x5d/0x160 kernel/entry/common.c:218 do_syscall_64+0xdc/0x1e0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598 alloc_pages_mpol+0x299/0x990 mm/mempolicy.c:2264 alloc_pages+0x1bf/0x1e0 mm/mempolicy.c:2335 dump_user_range+0x4a/0xee0 fs/coredump.c:940 elf_core_dump+0x57c7/0x5ae0 fs/binfmt_elf.c:2083 do_coredump+0x32d5/0x4920 fs/coredump.c:769 get_signal+0x267e/0x2d00 kernel/signal.c:2896 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x5d/0x160 kernel/entry/common.c:218 do_syscall_64+0xdc/0x1e0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 PID: 5368 Comm: segctord Not tainted 6.9.0-syzkaller-02707-g614da38e2f7a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 ===================================================== --- 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