This[1] is not an oops, but a BUG_ON() called on purpose inside the aufs
code. The function follows:
static int do_open_nondir(struct file *file, int flags)
{
int err;
aufs_bindex_t bindex;
struct file *h_file;
struct dentry *dentry;
struct au_finfo *finfo;
FiMustWriteLock(file);
err = 0;
dentry = file->f_dentry;
finfo = au_fi(file);
finfo->fi_h_vm_ops = NULL;
finfo->fi_vm_ops = NULL;
bindex = au_dbstart(dentry);
/* O_TRUNC is processed already */
BUG_ON(au_test_ro(dentry->d_sb, bindex, dentry->d_inode)
&& (flags & O_TRUNC));
h_file = au_h_open(dentry, bindex, flags, file);
if (IS_ERR(h_file))
err = PTR_ERR(h_file);
else {
au_set_fbstart(file, bindex);
au_set_fbend(file, bindex);
au_set_h_fptr(file, bindex, h_file);
au_update_figen(file);
/* todo: necessary? */
/* file->f_ra = h_file->f_ra; */
}
return err;
}
>From the fragment, triggering the BUG_ON(), it seems to check if the
aufs file/branch is readonly and if a truncate flag is set on the file.
So my question then is, are we doing something illegal according to aufs
expectations?
[1] kernel BUG at /build/buildd/linux-ti-
omap-2.6.33/ubuntu/aufs/f_op.c:84!
** Changed in: linux-ti-omap (Ubuntu Lucid)
Status: Triaged => In Progress
--
aufs broken in ti-omap kernel
https://bugs.launchpad.net/bugs/548924
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