| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Thu, 14 Sep 2006 20:24:23 +0200 From: Henrik Carlqvist <hc8@...yres.com> To: linux-kernel@...r.kernel.org Subject: Re: ocfs2 problem with nfs v2 Henrik Carlqvist <hc8@...yres.com> wrote: > As the old 2.2.6 kernel does not have support for NFS v3 but only NFS v2 > my guess is that this might trigger the bug. Today I used a Slackware 9.1 machine to mount the NFS share with NFS v2. Using NFS v3 in Slackware 9.1 the server works fine, but with NFS v2 I was able to repeat the bug. This is what it looks like on the NFS client: # uname -sr Linux 2.4.22 # mount -o nfsvers=2 ekorrapa:/san/old /mnt/hd/ # cat /proc/mounts | grep mnt/hd ekorrapa:/san/old /mnt/hd nfs rw,v2,rsize=8192,wsize=8192,hard,udp,lock,addr=ekorrapa 0 0 # ls /mnt/hd/ 1 11 13 15 17 19 20 3 5 7 9 mail 10 12 14 16 18 2 21 4 6 8 lost+found # ls -al /mnt/hd/ ls:/mnt/hd/lost+found: Input/output error ls: /mnt/hd/1: Input/output error ls: /mnt/hd/2: Input/output error ls: /mnt/hd/3: Input/output error ls: /mnt/hd/4: Input/output error ls: /mnt/hd/5: Input/output error ls: /mnt/hd/6: Input/output error ls: /mnt/hd/7: Input/output error ls: /mnt/hd/8: Input/output error ls: /mnt/hd/9: Input/output error ls: /mnt/hd/10: Input/output error ls: /mnt/hd/11: Input/output error ls: /mnt/hd/12: Input/output error ls: /mnt/hd/13: Input/output error ls: /mnt/hd/14: Input/output error ls: /mnt/hd/15: Input/output error ls: /mnt/hd/16: Input/output error ls: /mnt/hd/17: Input/output error ls: /mnt/hd/18: Input/output error ls: /mnt/hd/19: Input/output error ls: /mnt/hd/20: Input/output error ls: /mnt/hd/21: Input/output error ls: /mnt/hd/mail: Input/output error total 3 drwxr-xr-x 25 root root 2048 Sep 13 10:21 . drwxr-xr-x 5 root root 120 Mar 16 2002 .. >From the clients point of view it looks a little bit different compared with a 2.2.6 kernel. "ls" works, but "ls -l" does not work. With kernel 2.2.6 not even "ls" did work. I also get a slightly different error with kernel 2.4.22 on the client, "Input/output error" instead of "Operation not supported on transport endpoint". However, on the NFS server things look exactly the same as before: # uname -sr Linux 2.6.9-42.ELsmp # cat /proc/mounts | grep old /dev/emcpowerb1 /san/old ocfs2 rw,noatime 0 0 # fgrep ocfs2 /var/log/messages Sep 14 10:53:23 kattapa kernel: (5380,0):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 10:53:31 kattapa kernel: (5390,2):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 10:53:45 kattapa kernel: (5390,1):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 10:53:47 kattapa kernel: (5390,1):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 10:53:59 kattapa kernel: (5390,1):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 10:54:02 kattapa kernel: (5390,3):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:21:41 kattapa kernel: (5383,0):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:35:17 kattapa kernel: (5380,3):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:35:17 kattapa kernel: (5380,0):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:35:17 kattapa kernel: (5380,0):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:35:17 kattapa kernel: (5380,3):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:35:19 kattapa kernel: (5380,0):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:35:19 kattapa kernel: (5380,1):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:35:19 kattapa kernel: (5381,0):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:37:24 kattapa kernel: (5380,0):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding Sep 14 13:40:38 kattapa kernel: (5380,2):ocfs2_encode_fh:155 ERROR: fh buffer is too small for encoding The good thing with this is that the bug is possible to reproduce without having access to an NFS client running an ancient Linux distribution. By doing: mount -o nfsvers=2 server:/nfs/export /mount/point It is possible to repeat this bug. regards Henrik - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists