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 30A181AEFF7 for ; Thu, 4 Jul 2024 14:22:23 +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=1720102944; cv=none; b=K6HOIHNLh1nxi7QYa24yohOJJgX33EPJujlIH7UCSNOMpVM8jtNaCGf9BvFyxhTTXdJcikZXkT7/tNXRI6w2jJq1unOyBY8H6AwPy+Tr0E7WbTsy3nTsgDeV9Uc3Fc4ybx4fMJpEEWfGMH+YUyUDLLE7bsrURJEKkRhqlQVa6xY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720102944; c=relaxed/simple; bh=35CoZSReYLFJKV/f0XwHskDw7mzfsIS3I4SW2OMMszY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=tEEyX20gaAiRgrpAWTFDm+8QGzM/usYKxQ+YRUP0oA0bZ59aN8qpLw32PJ97elqzSV4Lc3CGSrURLqzycTk3py4r+Hynv1Osjrq5XqPQ3YEDpoPHpjhPZdUgGrIKx9vlu14hV4E6bCwfb3UZyXQwsmk4IEueoTNyS4MK/JdYMvI= 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-7f4cff1d3d5so76567339f.2 for ; Thu, 04 Jul 2024 07:22:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720102942; x=1720707742; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=FMGr0Y7IvvwgN+c1B3bxJlbrMDt7uSdc7MkaUFXaJx8=; b=TB4Ie3pDjuX9dqlM0C7a9KhOftqumyopRLFGQq8uCh6SGResmhLxUs80uMH/57bCqS VijELxDrWxkIjN9OLGj0QWvzswwIYEyuNGhIvz+g3vo+Mh0FkvMEe2i8sEa1tbpQw6gs cNojZv5IRTJy+iXadErhw7H1dRCF2QUvsxOMfYSDA4grYS4uEF1KN0gIB2qe3fTxDJ2j BSADHEfXIlXko+PJJN0zVu6HSGJBOfzhPA5ZK9sCABzeT7ffZW6hUCXWTMryM5HYeVLk jpXmMseneYyL7dl7pAMJsIWffPEoMOPJbrxHuzz9A8G6vctLHew5Gv3HS4+E81nlHdV0 iavw== X-Forwarded-Encrypted: i=1; AJvYcCURekVaJBxPwJgyZOi0FqJrocyAqeyNvJ+pUWmopV5VacuYFPQoS6x/ysYIsIlB8wgLaLhJZ3wBDelmtepJ6LQGVfqWWdkRFYn7OKEH X-Gm-Message-State: AOJu0YzKqhChoXg7AttAYFFeTItYp6z9ohrIqYiGvpR77X5AEOKWWoXQ F+3SGs2G5eNbG5dy2vtyYVeTihvv6F96L/sEl6KxVTHFp+YDS9GZuwMxbUnc8SMJYcHbxl5l9mG kj5Z88KXsNQJzVY4CawPi5yZKgACeF3LWwHJbEeF5A+HpgnLeyM1HW9k= X-Google-Smtp-Source: AGHT+IH8fvPnibHl2G49Hb1xKvbSeMA1YVnj67a9pmyNVef/AmfwjJCRFsKylUEAT9mK0dNUdmaOxLSAzvqi9joRVeH4ksVmVUr+ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:2043:b0:4bd:4861:d7ea with SMTP id 8926c6da1cb9f-4bf60de72a3mr105483173.2.1720102942425; Thu, 04 Jul 2024 07:22:22 -0700 (PDT) Date: Thu, 04 Jul 2024 07:22:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dc5b12061c6cac00@google.com> Subject: [syzbot] [fs?] KCSAN: data-race in __fsnotify_parent / __fsnotify_recalc_mask (5) From: syzbot To: amir73il@gmail.com, jack@suse.cz, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 795c58e4c7fc Merge tag 'trace-v6.10-rc6' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16a6b6b9980000 kernel config: https://syzkaller.appspot.com/x/.config?x=5b9537cd00be479e dashboard link: https://syzkaller.appspot.com/bug?extid=701037856c25b143f1ad 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/3d1d205c1fdf/disk-795c58e4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/641c78d42b7a/vmlinux-795c58e4.xz kernel image: https://storage.googleapis.com/syzbot-assets/45ecf25d8ba3/bzImage-795c58e4.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+701037856c25b143f1ad@syzkaller.appspotmail.com EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. ================================================================== BUG: KCSAN: data-race in __fsnotify_parent / __fsnotify_recalc_mask write to 0xffff8881001c9d44 of 4 bytes by task 6671 on cpu 1: __fsnotify_recalc_mask+0x216/0x320 fs/notify/mark.c:248 fsnotify_recalc_mask fs/notify/mark.c:265 [inline] fsnotify_add_mark_locked+0x703/0x870 fs/notify/mark.c:781 fsnotify_add_inode_mark_locked include/linux/fsnotify_backend.h:812 [inline] inotify_new_watch fs/notify/inotify/inotify_user.c:620 [inline] inotify_update_watch fs/notify/inotify/inotify_user.c:647 [inline] __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:786 [inline] __se_sys_inotify_add_watch+0x66f/0x810 fs/notify/inotify/inotify_user.c:729 __x64_sys_inotify_add_watch+0x43/0x50 fs/notify/inotify/inotify_user.c:729 x64_sys_call+0x2af1/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:255 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881001c9d44 of 4 bytes by task 10004 on cpu 0: fsnotify_object_watched fs/notify/fsnotify.c:187 [inline] __fsnotify_parent+0xd4/0x370 fs/notify/fsnotify.c:217 fsnotify_parent include/linux/fsnotify.h:96 [inline] fsnotify_file include/linux/fsnotify.h:131 [inline] fsnotify_open include/linux/fsnotify.h:401 [inline] vfs_open+0x1be/0x1f0 fs/open.c:1093 do_open fs/namei.c:3654 [inline] path_openat+0x1ad9/0x1fa0 fs/namei.c:3813 do_filp_open+0xf7/0x200 fs/namei.c:3840 do_sys_openat2+0xab/0x120 fs/open.c:1413 do_sys_open fs/open.c:1428 [inline] __do_sys_openat fs/open.c:1444 [inline] __se_sys_openat fs/open.c:1439 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1439 x64_sys_call+0x1057/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000000 -> 0x00002008 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10004 Comm: syz-executor Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #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