From 789d6d70b61e03838c5ff269b672effb63b14b63 Mon Sep 17 00:00:00 2001
From: Sascha Wildner <saw@online.de>
Date: Mon, 24 Dec 2012 22:48:03 +0100
Subject: [PATCH] librt/aio_cancel(): Set errno to EBADF if the fd is not
 valid.

---
 lib/librt/aio.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/librt/aio.c b/lib/librt/aio.c
index 3823714fa6..91f88530ce 100644
--- a/lib/librt/aio.c
+++ b/lib/librt/aio.c
@@ -37,6 +37,7 @@
 #include <sys/time.h>
 #include <sys/signal.h>
 #include <sys/queue.h>
+#include <sys/stat.h>
 #include <unistd.h>
 #include <errno.h>
 #include <sys/aio.h>
@@ -215,6 +216,13 @@ aio_return(struct aiocb *ap)
 int
 aio_cancel(int fildes, struct aiocb *aiocbp)
 {
+	struct stat sb;
+
+	/* must be a valid file descriptor */
+	if (fstat(fildes, &sb)) {
+		errno = EBADF;
+		return -1;
+	}
 	return (AIO_ALLDONE);
 }
 
-- 
2.41.0