From b8826e506ee58873725ec3a25a2a27fefd762574 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 18 Feb 2017 22:07:24 -0500
Subject: [PATCH] selftest for default_file_splice_read() infoleak

bug fixed in commit b9dc6f65bc5e ("fix a fencepost error in pipe_advance()")

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 tools/testing/selftests/Makefile                          | 1 +
 tools/testing/selftests/splice/Makefile                   | 8 ++++++++
 tools/testing/selftests/splice/default_file_splice_read.c | 8 ++++++++
 .../testing/selftests/splice/default_file_splice_read.sh  | 7 +++++++
 4 files changed, 24 insertions(+)
 create mode 100644 tools/testing/selftests/splice/Makefile
 create mode 100644 tools/testing/selftests/splice/default_file_splice_read.c
 create mode 100755 tools/testing/selftests/splice/default_file_splice_read.sh

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 71b05891a6a1..0e72f1d03c9e 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -24,6 +24,7 @@ TARGETS += ptrace
 TARGETS += seccomp
 TARGETS += sigaltstack
 TARGETS += size
+TARGETS += splice
 TARGETS += static_keys
 TARGETS += sync
 TARGETS += sysctl
diff --git a/tools/testing/selftests/splice/Makefile b/tools/testing/selftests/splice/Makefile
new file mode 100644
index 000000000000..de51f439d4a6
--- /dev/null
+++ b/tools/testing/selftests/splice/Makefile
@@ -0,0 +1,8 @@
+TEST_PROGS := default_file_splice_read.sh
+EXTRA := default_file_splice_read
+all: $(TEST_PROGS) $(EXTRA)
+
+include ../lib.mk
+
+clean:
+	rm -fr $(TEST_PROGS) $(EXTRA)
diff --git a/tools/testing/selftests/splice/default_file_splice_read.c b/tools/testing/selftests/splice/default_file_splice_read.c
new file mode 100644
index 000000000000..01dd6091554c
--- /dev/null
+++ b/tools/testing/selftests/splice/default_file_splice_read.c
@@ -0,0 +1,8 @@
+#define _GNU_SOURCE
+#include <fcntl.h>
+
+int main(int argc, char **argv)
+{
+        splice(0, 0, 1, 0, 1<<30, 0);
+	return 0;
+}
diff --git a/tools/testing/selftests/splice/default_file_splice_read.sh b/tools/testing/selftests/splice/default_file_splice_read.sh
new file mode 100755
index 000000000000..1ea2adeabc94
--- /dev/null
+++ b/tools/testing/selftests/splice/default_file_splice_read.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+n=`./default_file_splice_read </dev/null | wc -c`
+
+test "$n" = 0 && exit 0
+
+echo "default_file_splice_read broken: leaked $n"
+exit 1