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SUSE:SLE-12-SP5:GA
xen.7317
5a95571f-memory-dont-implicitly-unpin-in-decrea...
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File 5a95571f-memory-dont-implicitly-unpin-in-decrease-res.patch of Package xen.7317
# Commit d798a0952903db9d8ee0a580e03f214d2b49b7d7 # Date 2018-02-27 14:03:27 +0100 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> memory: don't implicitly unpin for decrease-reservation It very likely was a mistake (copy-and-paste from domain cleanup code) to implicitly unpin here: The caller should really unpin itself before (or after, if they so wish) requesting the page to be removed. This is XSA-252. Reported-by: Jann Horn <jannh@google.com> Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> --- a/xen/common/memory.c +++ b/xen/common/memory.c @@ -312,9 +312,6 @@ int guest_remove_page(struct domain *d, rc = guest_physmap_remove_page(d, gmfn, mfn, 0); - if ( !rc && test_and_clear_bit(_PGT_pinned, &page->u.inuse.type_info) ) - put_page_and_type(page); - if ( !rc && test_and_clear_bit(_PGC_allocated, &page->count_info) ) put_page(page);
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