Kernel Bug Tracker – Bug 37292
kernel BUG at fs/ecryptfs/read_write.c:47!
Last modified: 2011-09-06 08:05:30 UTC
Created attachment 61642 [details]
After opening Evolution in gnome, a screen console is display with the bugtrace error.
To shutdown the system, the system freeze and Magic keys doesn't work.
The problem is appear when I've upgraded to linux-2.6.39, but if I downgrade to linux-2.6.38 the problem is disappeared.
I use ecryptfs to encrypt my home directory.
To reproduce this on my end, it would help me to know how you use evolution.
I set up an encrypted home directory, running kernel 3.0-rc3, and don't see any issues while starting up evolution. I then pointed evolution to a small mbox and deleted a few emails with no problem.
Are you using evolution to connect to an imap server? Do you think this is happening while imap is fetching new headers?
I appreciate any info that you can provide.
If I set up a new user with no encrypted home directory, there are no errors.
I then encrypted the new home directory ("https://wiki.archlinux.org/index.php/System_Encryption_with_eCryptfs#PAM_Mount_.5BNew_Method.5D"). I open evolution (3.0.2-1), setup an imap account and read an email, 30 seconds later the bug appears.
With a pop account it's the same issue.
I've installed two kernels to try to reproduce this bug. I haven't done no other change.
1) linux-18.104.22.168 : no error
2) linux-3.0-rc5 : bug
I use a 64 bits system : x86_64.
I don't know how help you more.
Thanks for trying 3.0.0-rc5. I've set up an Arch system with encrypted home and pointed it at 2 imap accounts and 1 pop3 account and still haven't seen this bug. I then created a python script to generate a 2 GB mailbox of varying types of emails and sizes, served it up over imap, pointed evolution to it and still couldn't trigger this.
Are there no other eCryptfs errors in the logs besides the BUG output you attached?
I don't think it will make a difference here, but what is the lower filesystem? I've been using ext4 to try to reproduce this so far.
I'm going to assume that I can't reproduce it and, if I can find something that looks suspicious, I'll ask you to test a patch for me.
Created attachment 64202 [details]
My dmesg from this bug.
I can confirm this bug. The same happen to me. I thought at the beginning that it happens randomly but after I read this report i verified that it appears when i start evolution. I am using exchange plugin to evolution.
My system is:
- Linux 2.6.39-ARCH #1 SMP PREEMPT x86_64 Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz GenuineIntel GNU/Linux,
- Evolution 3.0.2
- ecryptfs-utils 87-1 (encrypted home folder)
And like before to shutdown the system, the system freeze and Magic keys doesn't work. Problem is on kernel 2.6.39 and on 2.6.38 disappeared.
I just got a similar stack trace on an Ubuntu 11.04 system using a mainline kernel from https://launchpad.net/~kernel-ppa/+archive/ppa .
$ uname -a
Linux butter 2.6.39-0-generic-pae #5~20110427-Ubuntu SMP Wed Apr 27 18:53:48 UTC 2011 i686 i686 i386 GNU/Linux
Unfortunately, I have no idea what may have triggered the bug, and I have no repro. I'm happy to provide system hardware and/or software details if that would be helpful.
Created attachment 66942 [details]
[PATCH] ecryptfs: Make inode bdi consistent with superblock bdi
I still cannot successfully reproduce this bug. Hopefully someone who can reliably reproduce it is willing to test this simple patch.
(In reply to comment #8)
> Created an attachment (id=66942) [details]
> [PATCH] ecryptfs: Make inode bdi consistent with superblock bdi
> I still cannot successfully reproduce this bug. Hopefully someone who can
> reliably reproduce it is willing to test this simple patch.
I was suffering from this bug using kernel 2.6.39 and 3.0 using Gentoo's sources.
I applied your patch and I am currently testing it. So far no kernel panic (since ~1 hour).
> I applied your patch and I am currently testing it. So far no kernel panic
> (since ~1 hour).
Just for the record: I patched kernel 3.0.
> I was suffering from this bug using kernel 2.6.39 and 3.0 using Gentoo's
One additional comment: I am not using Evolution and this problem did not occur when retrieving emails from IMAP using Claws-Mail but it occurred in various situations, especially when editing text files with VIM.
Just got a kernel panic again with your patch applied so it unfortunately does not fix this bug :(
digetx: please don't remove cc's unless they wish to be removed.
Which will be in v3.1-rc2.
I can verify that this Bug is fixed in 3.1.0-rc4-git1, running stably for a week now.