Re: Slab corruption after unloading a module

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There was no problem if I just load and unload the module. But if I
write to the device using "ls > /dev/temp" and then unload the
module, I would get slab corruption.

you return different value as what has really been consumed:

if (*f_pos + count > MAX_DSIZE)
count1 = MAX_DSIZE - *f_pos;

if (copy_from_user (temp_dev->data+*f_pos, buf, count1)) {
rv = -EFAULT;
goto wrap_up;
}
up (&temp_dev->sem);
*f_pos += count1;
return count;

may be it confuses the rest of kernel a bit?

- -andrey
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