From 156b29fca10fd25065fc501eb4b47cff931086f2 Mon Sep 17 00:00:00 2001 From: George Dunlap Date: Tue, 27 Feb 2018 11:16:55 +0000 Subject: [PATCH] grant: Release domain lock on 'map' path in cache_flush common/grant_table.c:cache_flush() grabs the rcu lock for the current domain, but only releases it on error paths. Note that this is not a security issue, as the preempt count is used exclusively for assertions at the moment. Signed-off-by: George Dunlap Reviewed-by: Jan Beulich --- xen/common/grant_table.c | 1 + 1 file changed, 1 insertion(+) diff --git a/xen/common/grant_table.c b/xen/common/grant_table.c index 48c547930c..8346994de6 100644 --- a/xen/common/grant_table.c +++ b/xen/common/grant_table.c @@ -3273,6 +3273,7 @@ static int cache_flush(const gnttab_cache_flush_t *cflush, grant_ref_t *cur_ref) unmap_domain_page(v); put_page(page); + rcu_unlock_domain(d); return ret; } -- 2.39.5