srp/016: Add a test that triggers RDMA hot-unplug

Kernel commit 8fe4ce5836e9 ("scsi: core: Fix a use-after-free"; v6.0-rc5)
fixes a kernel crash triggered by RDMA hot-unplug. This test triggers
RDMA hot-unplug and also triggers a kernel crash without the
aforementioned kernel commit.

Cc: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>

diff --git a/tests/srp/016 b/tests/srp/016
new file mode 100755 (executable)
index 0000000..43aebb2
--- /dev/null
+++ b/tests/srp/016
@@ -0,0 +1,20 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright 2022 Google LLC
+
+. tests/srp/rc
+
+DESCRIPTION="RDMA hot-unplug"
+QUICK=1
+
+test_hot_unplug() {
+       use_blk_mq y y || return $?
+       # This triggers a use-after-free with older kernels. See also
+       # https://lore.kernel.org/linux-rdma/17649b9c-7e42-1625-8bc9-8ad333ab771c@fujitsu.com/
+       stop_soft_rdma
+}
+
+test() {
+       trap 'trap "" EXIT; teardown' EXIT
+       setup && test_hot_unplug && echo Passed
+}

diff --git a/tests/srp/016.out b/tests/srp/016.out
new file mode 100644 (file)
index 0000000..5e25d8e
--- /dev/null
+++ b/tests/srp/016.out
@@ -0,0 +1,2 @@
+Configured SRP target driver
+Passed