null-blk currently power/submit_queues operations which will lead kernel null-ptr-dereference[1], add one regression test for it and the fix has been merged to v6.10-rc1 by [2]. [1] https://lore.kernel.org/linux-block/CAHj4cs9LgsHLnjg8z06LQ3Pr5cax-+Ps+xT7AP7TPnEjStuwZA@xxxxxxxxxxxxxx/ https://lore.kernel.org/linux-block/20240523153934.1937851-1-yukuai1@xxxxxxxxxxxxxxx/ [2] commit a2db328b0839 ("null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues'") Signed-off-by: Yi Zhang <yi.zhang@xxxxxxxxxx> --- tests/block/038 | 61 +++++++++++++++++++++++++++++++++++++++++++++ tests/block/038.out | 2 ++ 2 files changed, 63 insertions(+) create mode 100755 tests/block/038 create mode 100644 tests/block/038.out diff --git a/tests/block/038 b/tests/block/038 new file mode 100755 index 0000000..fe3c7cd --- /dev/null +++ b/tests/block/038 @@ -0,0 +1,61 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-3.0+ +# Copyright (C) 2024 Yi Zhang <yi.zhang@xxxxxxxxxx> +# +# Regression test for commit a2db328b0839 ("null_blk: fix null-ptr-dereference +# while configuring 'power' and 'submit_queues'"). + +. tests/block/rc +. common/null_blk + +DESCRIPTION="Test null-blk concurrent power/submit_queues operations" +QUICK=1 + +requires() { + _have_module null_blk + _have_module_param null_blk nr_devices + _have_module_param null_blk submit_queues +} + +null_blk_power_loop() { + local nullb="$1" + for ((i = 1; i <= 200; i++)); do + echo 1 > "/sys/kernel/config/nullb/${nullb}/power" + echo 0 > "/sys/kernel/config/nullb/${nullb}/power" + done +} + +null_blk_submit_queues_loop() { + local nullb="$1" + for ((i = 1; i <= 200; i++)); do + echo 1 > "/sys/kernel/config/nullb/${nullb}/submit_queues" + echo 4 > "/sys/kernel/config/nullb/${nullb}/submit_queues" + done +} + +test() { + echo "Running ${TEST_NAME}" + + local nullb_params=( + nr_devices=0 + ) + if ! _init_null_blk "${nullb_params[@]}"; then + echo "Loading null_blk failed" + return 1 + fi + + if ! _configure_null_blk nullb0; then + echo "Configuring null_blk nullb0 failed" + return 1 + fi + + # fire off two null-blk power/submit_queues concurrently and wait + # for them to complete... + null_blk_power_loop nullb0 & + null_blk_submit_queues_loop nullb0 & + wait + + _exit_null_blk + + echo "Test complete" +} diff --git a/tests/block/038.out b/tests/block/038.out new file mode 100644 index 0000000..aebde64 --- /dev/null +++ b/tests/block/038.out @@ -0,0 +1,2 @@ +Running block/038 +Test complete -- 2.45.1
