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vmw_balloon: fix inflation with batching

Browse source 
Embarrassingly, the recent fix introduced worse problem than it solved,
causing the balloon not to inflate. The VM informed the hypervisor that
the pages for lock/unlock are sitting in the wrong address, as it used
the page that is used the uninitialized page variable.

Fixes: b23220fe05 ("vmw_balloon: fixing double free when batching mode is off")
Cc: [email protected]
Reviewed-by: Xavier Deguillard <[email protected]>
Signed-off-by: Nadav Amit <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Nadav Amit 2018-07-02 19:27:13 -07:00 • committed by Greg Kroah-Hartman
commit 90d72ce079
1 changed files with 2 additions and 2 deletions
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4
drivers/misc/vmw_balloon.c
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@ -467,7 +467,7 @@ static int vmballoon_send_batched_lock(struct vmballoon *b,
unsigned int num_pages, bool is_2m_pages, unsigned int *target)
{
unsigned long status;
unsigned long pfn = page_to_pfn(b->page);
unsigned long pfn = PHYS_PFN(virt_to_phys(b->batch_page));
STATS_INC(b->stats.lock[is_2m_pages]);
@ -515,7 +515,7 @@ static bool vmballoon_send_batched_unlock(struct vmballoon *b,
unsigned int num_pages, bool is_2m_pages, unsigned int *target)
{
unsigned long status;
unsigned long pfn = page_to_pfn(b->page);
unsigned long pfn = PHYS_PFN(virt_to_phys(b->batch_page));
STATS_INC(b->stats.unlock[is_2m_pages]);