From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.3xo.fr (mail.3xo.fr [212.129.21.66]) (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 0049325DCE0; Mon, 24 Mar 2025 10:40:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.129.21.66 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742812815; cv=none; b=b7jH36No4qRE7xQKQDZEoO67X+48uIWy7WklZCB8uyESIIhaCxAV0PqJe7te/mt2qnJClUq+Kc9ajPZkyeYXqBr7lrISkOCtdXPjam6Tzo+GonPOKK1i9EMqi4m+DMK1YdU9nLGCikQGs/L9vtObvSrhaGBWFHBjh/M9PNJB5P8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742812815; c=relaxed/simple; bh=3zyKTjQs/OB6iAaRE9Ife3b39lro/KTj1mbHsGu+BpE=; h=MIME-Version:Date:From:To:Cc:Subject:Message-ID:Content-Type; b=Gl+qaG4Ch0hMqVBvYl2RhOADEJSPNh1EDJyEWvU1ddH0ZOMS+edUqseLkiUBnsiIdTip5u9KfnNo/TV5bgF6W/ON1tUoCru8ivyr4jH+ugmoqVMdYcRi+w5tyOs0WKEiGwG8ThhYHo7JKEMr1PGb8vKKleW+6k/KBy0q5GA3OIY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=3xo.fr; spf=pass smtp.mailfrom=3xo.fr; dkim=pass (2048-bit key) header.d=3xo.fr header.i=@3xo.fr header.b=t0tM5kh+; arc=none smtp.client-ip=212.129.21.66 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=3xo.fr Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=3xo.fr Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=3xo.fr header.i=@3xo.fr header.b="t0tM5kh+" Received: from localhost (mail.3xo.fr [212.129.21.66]) by mail.3xo.fr (Postfix) with ESMTP id 0AA44CB; Mon, 24 Mar 2025 11:40:11 +0100 (CET) X-Virus-Scanned: Debian amavis at nxo2.3xo.fr Received: from mail.3xo.fr ([212.129.21.66]) by localhost (mail.3xo.fr [212.129.21.66]) (amavis, port 10024) with ESMTP id TBIROaVj1m-o; Mon, 24 Mar 2025 11:40:09 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.3xo.fr D5CA58D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=3xo.fr; s=3xo; t=1742812809; bh=jAatwW99hb+aFvtznLhiTkgdJUYkBUYSrPmdAagNwv4=; h=Date:From:To:Cc:Subject:From; b=t0tM5kh+dyxp1nOdT4I36YGQhcvMEji0z1wKVUhoV8ZgT3XY2AefeXQR6w3p4uOuq FGI9P5WaYWOIXoMAfFPnlSvHnfHW8WuNjDkGzvXQtru+BvUmdGua3sylaUQoJc9nH/ KfNrn7lSqcyufMa/Q7tASGsjzR7uVrplbD3COYW5m28PLoMstMnm7/o9+sQGU9s9T+ Yx1Vxk+Ui7cX3TDv3SJy4jq8UQakoa9OUy1dXaytteJODDaM6hZl5iTc/lwq6Hv4HC 7GA+UXS4t+a+Tpbw6pE1t5NIfa+93Gt4IoEEHtn8ahvNJB0ctu6FaDncQBu+siWe8Q Q4UYS7wn/xEzA== Received: from mail.3xo.fr (mail.3xo.fr [212.129.21.66]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by mail.3xo.fr (Postfix) with ESMTPSA id D5CA58D; Mon, 24 Mar 2025 11:40:08 +0100 (CET) Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Mon, 24 Mar 2025 11:40:08 +0100 From: Nicolas Baranger To: Christoph Hellwig , David Howells , netfs@lists.linux.dev, linux-cifs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Steve French , Jeff Layton , Christian Brauner Subject: [netfs/cifs - Linux 6.14] loop on file cat + file copy when files are on CIFS share Message-ID: <10bec2430ed4df68bde10ed95295d093@3xo.fr> X-Sender: nicolas.baranger@3xo.fr Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Hi Christoph, David Sorry my last mail didn't arrive at the top of the list so I resend it with a new title I don't know if it had already been reported but after building Linux 6.14-rc1 I constat the following behaviour: 'cat' command is going on a loop when I cat a file which reside on cifs share And so 'cp' command does the same: it copy the content of a file on cifs share and loop writing it to the destination I did test with a file named 'toto' and containing only ascii string 'toto'. When I started copying it from cifs share to local filesystem, I had to CTRL+C the copy of this 5 bytes file after some time because the destination file was using all the filesystem free space and containing billions of 'toto' lines Here is an example with cat: CIFS SHARE is mounted as /mnt/fbx/FBX-24T CIFS mount options: grep cifs /proc/mounts //10.0.10.100/FBX24T /mnt/fbx/FBX-24T cifs rw,nosuid,nodev,noexec,relatime,vers=3.1.1,cache=none,upcall_target=app,username=fbx,domain=HOMELAN,uid=0,noforceuid,gid=0,noforcegid,addr=10.0.10.100,file_mode=0666,dir_mode=0755,iocharset=utf8,soft,nounix,serverino,mapposix,mfsymlinks,reparse=nfs,nativesocket,symlink=mfsymlinks,rsize=65536,wsize=65536,bsize=16777216,retrans=1,echo_interval=60,actimeo=1,closetimeo=1 0 0 KERNEL: uname -a Linux 14RV-SERVER.14rv.lan 6.14.0.1-ast-rc2-amd64 #0 SMP PREEMPT_DYNAMIC Wed Feb 12 18:23:00 CET 2025 x86_64 GNU/Linux To be reproduced: echo toto >/mnt/fbx/FBX-24T/toto ls -l /mnt/fbx/FBX-24T/toto -rw-rw-rw- 1 root root 5 20 mars 09:20 /mnt/fbx/FBX-24T/toto cat /mnt/fbx/FBX-24T/toto toto toto toto toto toto toto toto ^C strace cat /mnt/fbx/FBX-24T/toto execve("/usr/bin/cat", ["cat", "/mnt/fbx/FBX-24T/toto"], 0x7ffc39b41848 /* 19 vars */) = 0 brk(NULL) = 0x55755b1c1000 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f55f95d6000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "glibc-hwcaps/x86-64-v3/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "glibc-hwcaps/x86-64-v2/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "tls/haswell/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "tls/haswell/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "tls/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "tls/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "haswell/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "haswell/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/glibc-hwcaps/x86-64-v3/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/glibc-hwcaps/x86-64-v3", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/glibc-hwcaps/x86-64-v2/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/glibc-hwcaps/x86-64-v2", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/tls/haswell/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/tls/haswell/x86_64", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/tls/haswell/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/tls/haswell", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/tls/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/tls/x86_64", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/tls/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/tls", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/haswell/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/haswell/x86_64", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/haswell/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/haswell", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/x86_64", 0x7fff25937800, 0) = -1 ENOENT (Aucun fichier ou dossier de ce type) openat(AT_FDCWD, "/usr/local/cuda-12.6/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (Aucun fichier ou dossier de ce type) newfstatat(AT_FDCWD, "/usr/local/cuda-12.6/lib64", {st_mode=S_IFDIR|S_ISGID|0755, st_size=4570, ...}, 0) = 0 openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=148466, ...}, AT_EMPTY_PATH) = 0 mmap(NULL, 148466, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f55f95b1000 close(3) = 0 openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20t\2\0\0\0\0\0"..., 832) = 832 pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784 newfstatat(3, "", {st_mode=S_IFREG|0755, st_size=1922136, ...}, AT_EMPTY_PATH) = 0 pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784 mmap(NULL, 1970000, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f55f93d0000 mmap(0x7f55f93f6000, 1396736, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x26000) = 0x7f55f93f6000 mmap(0x7f55f954b000, 339968, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x17b000) = 0x7f55f954b000 mmap(0x7f55f959e000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1ce000) = 0x7f55f959e000 mmap(0x7f55f95a4000, 53072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f55f95a4000 close(3) = 0 mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f55f93cd000 arch_prctl(ARCH_SET_FS, 0x7f55f93cd740) = 0 set_tid_address(0x7f55f93cda10) = 38427 set_robust_list(0x7f55f93cda20, 24) = 0 rseq(0x7f55f93ce060, 0x20, 0, 0x53053053) = 0 mprotect(0x7f55f959e000, 16384, PROT_READ) = 0 mprotect(0x55754475e000, 4096, PROT_READ) = 0 mprotect(0x7f55f960e000, 8192, PROT_READ) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 munmap(0x7f55f95b1000, 148466) = 0 getrandom("\x19\x6b\x9e\x55\x7e\x09\x74\x5f", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55755b1c1000 brk(0x55755b1e2000) = 0x55755b1e2000 openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3 newfstatat(3, "", {st_mode=S_IFREG|0644, st_size=3048928, ...}, AT_EMPTY_PATH) = 0 mmap(NULL, 3048928, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f55f9000000 close(3) = 0 newfstatat(1, "", {st_mode=S_IFCHR|0600, st_rdev=makedev(0x88, 0), ...}, AT_EMPTY_PATH) = 0 openat(AT_FDCWD, "/mnt/fbx/FBX-24T/toto", O_RDONLY) = 3 newfstatat(3, "", {st_mode=S_IFREG|0666, st_size=5, ...}, AT_EMPTY_PATH) = 0 fadvise64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0 mmap(NULL, 16785408, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f55f7ffe000 read(3, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16777216) = 16711680 write(1, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16711680toto ) = 16711680 read(3, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16777216) = 16711680 write(1, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16711680toto ) = 16711680 read(3, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16777216) = 16711680 write(1, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16711680toto ) = 16711680 read(3, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16777216) = 16711680 write(1, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16711680toto ) = 16711680 read(3, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16777216) = 16711680 write(1, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16711680toto ) = 16711680 read(3, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16777216) = 16711680 write(1, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16711680toto ) = 16711680 read(3, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16777216) = 16711680 write(1, "toto\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 16711680toto ^Cstrace: Process 38427 detached Please let me know if it had already been fixed or reported and if you're able to reproduce this issue. Thanks for help Kind regards Nicolas Baranger