[PATCH] memalign: perform rcu_read_unlock on ENOMEM

[PATCH] memalign: perform rcu_read_unlock on ENOMEM

[Eric Wong]

We must not forget to release RCU read locks even if the
process will probably die, soon, due to ENOMEM.

I noticed this while working on the Perl5/XS port.

Link: https://80x24.org/mwrap-perl/20191102020331.28050-4-e@80x24.org/
---
 ext/mwrap/mwrap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/mwrap/mwrap.c b/ext/mwrap/mwrap.c
index 2ee04a5..4575e34 100644
--- a/ext/mwrap/mwrap.c
+++ b/ext/mwrap/mwrap.c
@@ -632,9 +632,9 @@ internal_memalign(void **pp, size_t alignment, size_t size, uintptr_t caller)
 				p = ptr_align(p, alignment);
 			h = ptr2hdr(p);
 			alloc_insert_rcu(l, h, size, real);
-			update_stats_rcu_unlock(l);
 			*pp = p;
 		}
+		update_stats_rcu_unlock(l);
 	}
 
 	return real ? 0 : ENOMEM;