From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sipsolutions.net (s3.sipsolutions.net [168.119.38.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9CC0233D7C for ; Wed, 21 May 2025 11:07:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=168.119.38.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747825667; cv=none; b=f9OOpiXwx+9p0U09HiFvrPJiyTCr3MEBWgdgluavBJ2ZQ44saAAFfZzL75RSt/zPIZfKCYGTUHn3dlqeOVJfIW+RJ20vkEF6POI5hJNmqzxJ+n2PMfuMaZ/unzmjCjOuCFh3c4c1BEGhG3AsCoJRxSuudlspM0PbiHWkhmi2Sxg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747825667; c=relaxed/simple; bh=qCE+A1fEaIQU0CHly0oL56Nsc2rvQr3ekMTqFj22fSI=; h=Message-ID:Subject:From:To:Date:Content-Type:MIME-Version; b=mMOqD6J9NpqAshtEWY5NvRrONENmOeHxTBJiIs4jq2tsS1RKajeplypDOSrD2isF5VEKL1R3AgHMRKWVj/mHoQNIuvAQgnQ6LmSqYydQmOKV0jtZZ9J0HK3KOAkEaaGjH8/nVViBhalVVlEWHnurJsyK3ipwnrqzT9A4BKKCaDg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sipsolutions.net; spf=pass smtp.mailfrom=sipsolutions.net; dkim=pass (2048-bit key) header.d=sipsolutions.net header.i=@sipsolutions.net header.b=EbIcgLal; arc=none smtp.client-ip=168.119.38.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sipsolutions.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sipsolutions.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sipsolutions.net header.i=@sipsolutions.net header.b="EbIcgLal" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sipsolutions.net; s=mail; h=MIME-Version:Content-Transfer-Encoding: Content-Type:Date:To:From:Subject:Message-ID:Sender:Reply-To:Cc:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-To:Resent-Cc: Resent-Message-ID:In-Reply-To:References; bh=qCE+A1fEaIQU0CHly0oL56Nsc2rvQr3ekMTqFj22fSI=; t=1747825665; x=1749035265; b=EbIcgLalk2piezRKzxIQOz4SAGev8O2lu21E544c5TKpoZMphZnqUcSvjWutWmRPXLHyHkn+aIH Q8ki+OPoIJYlFi2Wo7EhbmBCx+8apWGJbqgc4YPDn+1sgMAclE+ufizkBhqQJLKNU6gD/l6SukH6v f+4aU78XrPO8F/g12q9ivSqUYJ4xLA+07FUrqx9w34qUL1rTacTYkjfkAFCemFuQPD8PZTiSLog00 0NyWNtSdLxARfG2iM9RwpSnPobgkdRHburpMonfjIx0FIk8JkqsVyMnPbLQOwMGY9M9aWKpah5VFl e23h9kMRLw3uJHnbjxjZptQDBnqhbYjFPOHw==; Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.98.2) (envelope-from ) id 1uHhIV-0000000EM31-15CK for linux-cifs@vger.kernel.org; Wed, 21 May 2025 13:07:43 +0200 Message-ID: <50815dea489f26cf2c8d34162d8be5f0a7d3465e.camel@sipsolutions.net> Subject: 6.14.6: copy from cifs mount never finishes From: Johannes Berg To: linux-cifs@vger.kernel.org Date: Wed, 21 May 2025 13:07:42 +0200 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.3 (3.54.3-1.fc41) Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-malware-bazaar: not-scanned Hi, So I'm on 6.14.6 on Fedora, trying to copy a few relatively small files. I went to lunch and when I came back it still wasn't finished, and the first file was just growing and growing in size ... Reproducing it, I see: $ ls -l /mnt/dmesg_log.txt -rwxr-xr-x. 1 root root 271261 May 13 13:00 /mnt/dmesg_log.txt $ strace cp /mnt/dmesg_log.txt /tmp/ execve("/usr/bin/cp", ["cp", "/mnt/dmesg_log.txt", "/tmp/"], 0x7ffcae506680= /* 85 vars */) =3D 0 ... openat(AT_FDCWD, "/tmp/", O_RDONLY|O_PATH|O_DIRECTORY) =3D 3 newfstatat(AT_FDCWD, "/mnt/dmesg_log.txt", {st_mode=3DS_IFREG|0755, st_size= =3D271261, ...}, 0) =3D 0 newfstatat(3, "dmesg_log.txt", 0x7ffdcacac290, 0) =3D -1 ENOENT (No such fi= le or directory) openat(AT_FDCWD, "/mnt/dmesg_log.txt", O_RDONLY) =3D 4 fstat(4, {st_mode=3DS_IFREG|0755, st_size=3D271261, ...}) =3D 0 openat(3, "dmesg_log.txt", O_WRONLY|O_CREAT|O_EXCL, 0755) =3D 5 ioctl(5, BTRFS_IOC_CLONE or FICLONE, 4) =3D -1 EXDEV (Invalid cross-device = link) fstat(5, {st_mode=3DS_IFREG|0755, st_size=3D0, ...}) =3D 0 fadvise64(4, 0, 0, POSIX_FADV_SEQUENTIAL) =3D 0 uname({sysname=3D"Linux", nodename=3D"jberg1-mobl2.ger.corp.intel.com", ...= }) =3D 0 copy_file_range(4, NULL, 5, NULL, 9223372035781033984, 0) =3D -1 EXDEV (Inv= alid cross-device link) mmap(NULL, 1056768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)= =3D 0x7f1d2a6fe000 read(4, "[ 3410.434280] iwlwifi 0000:3d:0"..., 1048576) =3D 983040 now that's already wrong, the file is only 271261 bytes! That should have returned 271261, not 983040. Next that data is written out, nothing special, except when I look at the data, after offset 271261 it's filled up with zeroes. write(5, "[ 3410.434280] iwlwifi 0000:3d:0"..., 983040) =3D 983040 It gets worse from here though, because now even the next read doesn't return 0 for EOF: read(4, "[ 3410.434280] iwlwifi 0000:3d:0"..., 1048576) =3D 983040 write(5, "[ 3410.434280] iwlwifi 0000:3d:0"..., 983040) =3D 983040 And that just repeats forever. johannes