xen/balloon: fix accounting in alloc_xenballooned_pages error path

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target_unpopulated is incremented with nr_pages at the start of the
function, but the call to free_xenballooned_pages will only subtract
pgno number of pages, and thus the rest need to be subtracted before
returning or else accounting will be skewed.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200727091342.52325-2-roger.pau@citrix.com
Signed-off-by: Juergen Gross <jgross@suse.com>

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Roger Pau Monne 2020-07-27 11:13:39 +02:00 • committed by Juergen Gross

parent 4e722d4fe2

commit 1951fa33ec

1 changed files with 6 additions and 0 deletions

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drivers/xen/balloon.c

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