[PATCH blktests 4/4] nvme/073: test that nvmet rejects a zone report NUMD that wraps

[Andrea Parri <parri.andrea@gmail.com>]

Verify that Zone Management Receive rejects a NUMD whose byte count
wraps a 32-bit calculation, while accepting an ordinary request. The
test runs on every configured transport.

The test fails on the unpatched kernel and passes with the fix applied.

Assisted-by: LLM
Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
---
 tests/nvme/073     | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/nvme/073.out |  2 ++
 2 files changed, 48 insertions(+)
 create mode 100755 tests/nvme/073
 create mode 100644 tests/nvme/073.out

diff --git a/tests/nvme/073 b/tests/nvme/073
new file mode 100755
index 0000000000000..c6d3d29f4b906
--- /dev/null
+++ b/tests/nvme/073
@@ -0,0 +1,46 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2026 Andrea Parri
+#
+# Check that the NVMe target rejects a zone report NUMD whose byte count
+# overflows a 32-bit value.
+#
+# Regression test for patch "nvmet: zns: reject a NUMD whose byte count wraps".
+
+. tests/nvme/rc
+. common/null_blk
+
+DESCRIPTION="reject an NVMe target zone report NUMD that wraps"
+QUICK=1
+
+requires() {
+	_nvme_requires
+	_have_loop
+	_require_kernel_nvme_target
+	_have_module null_blk
+	_have_kernel_options BLK_DEV_ZONED
+}
+
+set_conditions() {
+	_set_nvme_trtype "$@"
+}
+
+test() {
+	echo "Running ${TEST_NAME}"
+
+	local dev
+
+	_setup_nvmet
+	_register_test_cleanup _cleanup_nvmet_zoned_target
+	if ! _nvmet_zoned_target_setup; then
+		return 1
+	fi
+	dev="/dev/$(_find_nvme_ns "$def_subsys_uuid")"
+
+	_check_zone_report "$dev" 64 15 0
+	_check_zone_report "$dev" 64 0x4000000f 2
+
+	_nvmet_zoned_target_cleanup
+
+	echo "Test complete"
+}
diff --git a/tests/nvme/073.out b/tests/nvme/073.out
new file mode 100644
index 0000000000000..ed6690e578688
--- /dev/null
+++ b/tests/nvme/073.out
@@ -0,0 +1,2 @@
+Running nvme/073
+Test complete
-- 
2.53.0