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 9C82122578D for ; Mon, 10 Mar 2025 09:40:27 +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=1741599629; cv=none; b=CYSL4Oos/VCz4c5HvSqC5ewq7Knnw6lXgfZ3yJoTj8Kw4GXozvrU/Ew5XwDYWfSaeNw0pz3hPwkyt141JIw85u8IjkWT4WjICMXFSQkt76jBHOGTWkbk2el6Oh9S346ieIiHuCzs7Kt9WzRcgW0L8ZHs+nBP1aCW3zWwJGIL5MA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741599629; c=relaxed/simple; bh=lo+mgRRNQjvpOTF3c3mfILdt7OCcuqmpFl0MOtPCrC8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=HqploRXRHdLr7VjwL+lHxmjY/Le+h0M3l2l9OReVzDZ9IBqgFBGdzK+7e0gDB+Ny9FrdufYpKtGmhgMzENDY9SvPk2zBo8NC6gTDRDGmFw30PVUM2VfWx8330ma7Phaqs5dliBq+H7v5kYLcvo8w374z8SwCOXrYoJL2M/kJuKg= 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-85b3b781313so351111439f.1 for ; Mon, 10 Mar 2025 02:40:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741599627; x=1742204427; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=NE/k1yN/gLjrNlDfMWfhJPadtzMdT1WCO7NFniN3tmA=; b=Cg7McH6IQymv1AqeKTXtrpmmJpfATPhTwTabCgv0Eoh6prJdrc6NhrVt0mhaad06QP 1zf2+phmBcRzYpi9U9I8krw16Wm7hWGhvOOy1gdHLfOSvbv0ISsrJGvF3EZPW/bhjFVZ 3z+V63FHXJwsJ+wfv5OmMXJd41jKHkDFTmZCa4bFN6T2L07K8KBGCn+uUax78yPc7kMa jF4Qp2HFsr92CvHSBfkoda9Tpi1eVEMqU/SILmRpKl4pcgF+R/Xeu/HGTDL2voOugzBp dg55s1+nSG3NAijBeQWMptKtxavNvmV6YgcItINm9qOA0wyGMfGPs2VzJKgIdi2WykQt OYFQ== X-Forwarded-Encrypted: i=1; AJvYcCWxa1SgfobAxh1GxqeqMD5J6nfebz3SL00p3Upe2t4shTFz7srMCNQ5KBKoi2K89R8h+GkWtXe4al4m6XQ=@vger.kernel.org X-Gm-Message-State: AOJu0Ywq30+DEGcaWp4F/aqC4RKpyvi6q0gHcGVWzU/Lkdn6e9F7de1k wup8aqWlZlzknWSKZNUs1XFGmHlOmPmelv7hr2NB1WTViRVXfhO6Wr+2G3bGCkUCrhTL7W80iOl zXV5Sf0AbkKk71Wh4OMrAjLWc8BC1IVc6p+ICCmQE4udoE00+Re+y8jc= X-Google-Smtp-Source: AGHT+IFwfuahL2FdpG6q4fYGDj1OphYaUWZoo8mff8eTs9/Lt2LG1X3x7humY8uWcVcDb4A33QAji53ZHNKx8r4N2MQYNRASfR40 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:198e:b0:3d4:36da:19a1 with SMTP id e9e14a558f8ab-3d44193ed4fmr179769775ab.21.1741599626800; Mon, 10 Mar 2025 02:40:26 -0700 (PDT) Date: Mon, 10 Mar 2025 02:40:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67ceb38a.050a0220.e1a89.04b1.GAE@google.com> Subject: [syzbot] [mm?] [fs?] KCSAN: data-race in __filemap_add_folio / invalidate_bdev (8) From: syzbot To: akpm@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 80e54e84911a Linux 6.14-rc6 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1664a7a8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=958433697845b9a6 dashboard link: https://syzkaller.appspot.com/bug?extid=f2aaf773187f5cae54f3 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/e94728c052e3/disk-80e54e84.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/742f05e27746/vmlinux-80e54e84.xz kernel image: https://storage.googleapis.com/syzbot-assets/90d418e775f7/bzImage-80e54e84.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f2aaf773187f5cae54f3@syzkaller.appspotmail.com EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. ================================================================== BUG: KCSAN: data-race in __filemap_add_folio / invalidate_bdev read-write to 0xffff888100630570 of 8 bytes by task 3291 on cpu 0: __filemap_add_folio+0x430/0x6f0 mm/filemap.c:929 filemap_add_folio+0x9c/0x1b0 mm/filemap.c:981 page_cache_ra_unbounded+0x1c1/0x350 mm/readahead.c:276 do_page_cache_ra mm/readahead.c:328 [inline] force_page_cache_ra mm/readahead.c:357 [inline] page_cache_sync_ra+0x252/0x680 mm/readahead.c:585 filemap_get_pages+0x2ca/0x11a0 mm/filemap.c:2580 filemap_read+0x230/0x8c0 mm/filemap.c:2691 blkdev_read_iter+0x228/0x2d0 block/fops.c:796 new_sync_read fs/read_write.c:484 [inline] vfs_read+0x5cc/0x6f0 fs/read_write.c:565 ksys_read+0xe8/0x1b0 fs/read_write.c:708 __do_sys_read fs/read_write.c:717 [inline] __se_sys_read fs/read_write.c:715 [inline] __x64_sys_read+0x42/0x50 fs/read_write.c:715 x64_sys_call+0x2874/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:1 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 0xffff888100630570 of 8 bytes by task 3306 on cpu 1: invalidate_bdev+0x25/0x70 block/bdev.c:99 ext4_put_super+0x571/0x810 fs/ext4/super.c:1356 generic_shutdown_super+0xe5/0x220 fs/super.c:642 kill_block_super+0x2a/0x70 fs/super.c:1710 ext4_kill_sb+0x44/0x80 fs/ext4/super.c:7368 deactivate_locked_super+0x7d/0x1c0 fs/super.c:473 deactivate_super+0x9f/0xb0 fs/super.c:506 cleanup_mnt+0x268/0x2e0 fs/namespace.c:1413 __cleanup_mnt+0x19/0x20 fs/namespace.c:1420 task_work_run+0x13a/0x1a0 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0xa8/0x120 kernel/entry/common.c:218 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x000000000000000d -> 0x000000000000000e Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3306 Comm: syz-executor Not tainted 6.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ================================================================== --- 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