From 621c12da8cf131ea3ba9024131b1e125b55862cd Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 27 Dec 2016 11:43:34 +0000
Subject: io.c: fix race between read and close

* io.c (io_fillbuf): fix race between read and close and bail out
  in the case the IO gets closed before the reading thread achieve
  the lock.  [ruby-core:78845] [Bug #13076]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57224 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 io.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'io.c')

diff --git a/io.c b/io.c
index 2731bb829f..1074689560 100644
--- a/io.c
+++ b/io.c
@@ -1775,6 +1775,7 @@ io_fillbuf(rb_io_t *fptr)
 		rb_syserr_fail_path(e, path);
 	    }
         }
+	if (r > 0) rb_io_check_closed(fptr);
         fptr->rbuf.off = 0;
         fptr->rbuf.len = (int)r; /* r should be <= rbuf_capa */
         if (r == 0)
-- 
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