On 03/24, Oleg Nesterov wrote:
>
> On 03/22, Anton Arapov wrote:
> >
> > @@ -1139,6 +1155,10 @@ static struct xol_area *get_xol_area(void)
> >     if (!area->page)
> >             goto free_bitmap;
> >
> > +   /* pre-allocate for return probes */
> > +   set_bit(0, area->bitmap);
> > +   fill_page(area->page, 0, &insn);
>
> sizeof(insn) == UPROBE_SWBP_INSN_SIZE != MAX_UINSN_BYTES. See also the
> comments above.

Sorry, forgot to mention... you also need to update ->slot_count.

Oleg.

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