[Crash-utility] LKCD v9 dumps with non-standard dump header size

[Troy Heber]

On 12/15/05 09:09, Dave Anderson wrote:
> 
> I don't think that the "else" part is required since lkcd_offset_to_first_page
> is statically initialized to LKCD_OFFSET_TO_FIRST_PAGE above.  But
> for readability this looks fine to me.
> 
 
It's not the initialization that's the problem, it's the unconditional
assignment of dh_dump_buffer_size in hunk 2 of the patch. That
assignment has to be conditional on the dump version. 

Troy
 
> > --- lkcd_v8.c.ori       2005-12-08 14:53:07.026719000 -0700
> > +++ lkcd_v8.c   2005-12-14 14:52:40.086407560 -0700
> > @@ -57,10 +57,13 @@
> >         if (read(lkcd->fd, dh, sizeof(dump_header_t)) !=
> >             sizeof(dump_header_t))
> >                 return FALSE;
> > -       if ((dh->dh_version & LKCD_DUMP_VERSION_NUMBER_MASK) == LKCD_DUMP_V9)
> > +       if ((dh->dh_version & LKCD_DUMP_VERSION_NUMBER_MASK) == LKCD_DUMP_V9){
> >             if (read(lkcd->fd, &dh_dump_buffer_size, sizeof(dh_dump_buffer_size)) !=
> >                 sizeof(dh_dump_buffer_size))
> >                     return FALSE;
> > +           lkcd_offset_to_first_page = dh_dump_buffer_size;
> > +       } else
> > +           lkcd_offset_to_first_page = LKCD_OFFSET_TO_FIRST_PAGE;
> >
> >          lkcd->dump_page = dp;
> >          lkcd->dump_header = dh;
> > @@ -147,7 +150,6 @@
> >         lkcd->compression = dh->dh_dump_compress;
> >          lkcd->page_header_size = sizeof(dump_page_t);
> >
> > -        lkcd_offset_to_first_page = dh_dump_buffer_size;
> >          lseek(lkcd->fd, lkcd_offset_to_first_page, SEEK_SET);
> >
> >         /*