[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH v2 4/4] mini-os: fix bug in ballooning on PVH
Juergen Gross, le dim. 19 juin 2022 08:52:53 +0200, a ecrit: > There is a subtle bug in ballooning code for PVH: in case ballooning > extends above a non-RAM area of the memory map, wrong pages will be > used. > > Signed-off-by: Juergen Gross <jgross@xxxxxxxx> Reviewed-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx> > --- > V2: > - new patch > --- > balloon.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/balloon.c b/balloon.c > index 6ad07644..55be8141 100644 > --- a/balloon.c > +++ b/balloon.c > @@ -124,7 +124,7 @@ int balloon_up(unsigned long n_pages) > for ( pfn = 0; pfn < rc; pfn++ ) > { > arch_pfn_add(start_pfn + pfn, balloon_frames[pfn]); > - free_page(pfn_to_virt(nr_mem_pages + pfn)); > + free_page(pfn_to_virt(start_pfn + pfn)); > } > > nr_mem_pages += rc; > -- > 2.35.3 >
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