Tomas M:
> So I enabled debug and here is the result (attached)
        :::
> kernel BUG at /usr/src/a/aufs/fs/aufs/iinfo.c:64!
        :::
> Call Trace:
>  [<f8cec6be>] au_new_inode+0x45e/0x510 [aufs]
>  [<f8ced1f9>] aufs_permission+0x149/0x260 [aufs]
>  [<f8cecd1d>] aufs_lookup+0x7d/0xd0 [aufs]
>  [<c0165660>] do_lookup+0x130/0x170

Thnak you.
It is much easier to debug.
But this Call Trace is strange because of aufs_permission() between
aufs_lookup() and au_new_inode().
- aufs_lookup() never call aufs_permission()
- aufs_permission() never calls au_new_inode()

I guess that you didn't enable CONFIG_FRAME_POINTER, so I want you to
enable these configurations.
- DEBUG_KERNEL
- FRAME_POINTER
- DEBUG_STACKOVERFLOW

And please show me the output of this command (for the current aufs module)
The result may depend on your compiler.
$ objdump -d /your/current/aufs.ko | perl 
/your/kernel/src/scripts/checkstack.pl i386


Junjiro Okajima

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