Mailing List Archive

xen/arch/x86/mm/paging.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)


hap_log_dirty_init unconditionally sets the top of the log dirty
bitmap to INVALID_MFN. If there had been a bitmap allocated, it is
then leaked, and the host crashes on an ASSERT when the domain is
cleaned up. Fixing it here.

Signed-off-by: Tim Deegan <tim@xen.org>
Acked-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>

diff -r 1b241f984167 -r bea03a7fe212 xen/arch/x86/mm/paging.c
--- a/xen/arch/x86/mm/paging.c
+++ b/xen/arch/x86/mm/paging.c
@@ -595,7 +595,6 @@ void paging_log_dirty_init(struct domain
d->arch.paging.log_dirty.enable_log_dirty = enable_log_dirty;
d->arch.paging.log_dirty.disable_log_dirty = disable_log_dirty;
d->arch.paging.log_dirty.clean_dirty_bitmap = clean_dirty_bitmap;
- d->arch.paging.log_dirty.top = _mfn(INVALID_MFN);
}

/* This function fress log dirty bitmap resources. */
@@ -617,6 +616,7 @@ int paging_domain_init(struct domain *d,

mm_lock_init(&d->arch.paging.lock);

+ d->arch.paging.log_dirty.top = _mfn(INVALID_MFN);
/* The order of the *_init calls below is important, as the later
* ones may rewrite some common fields. Shadow pagetables are the
* default... */

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