[PATCH liburing 1/4] tests/reg-wait: test registering RO memory

[Pavel Begunkov <asml.silence@gmail.com>]

Mapping should be writable and those we can't use read only user memory,
check that it fails. It also exercises one of the fail paths.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 test/reg-wait.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/test/reg-wait.c b/test/reg-wait.c
index b7c823a..544cd48 100644
--- a/test/reg-wait.c
+++ b/test/reg-wait.c
@@ -365,8 +365,22 @@ static int test_regions(void)
 		return T_EXIT_FAIL;
 	}
 	rd.user_addr = (__u64)(unsigned long)buffer;
-
 	free(buffer);
+
+	buffer = mmap(NULL, page_size, PROT_READ, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+	if (buffer == MAP_FAILED) {
+		fprintf(stderr, "mmap alloc failed\n");
+		return 1;
+	}
+
+	rd.user_addr = (__u64)(unsigned long)buffer;
+	ret = test_try_register_region(&mr, true);
+	if (ret != -EFAULT) {
+		fprintf(stderr, "test_try_register_region() RO uptr %i\n", ret);
+		return T_EXIT_FAIL;
+	}
+
+	munmap(buffer, page_size);
 	return 0;
 }
 
-- 
2.46.0