Greeting,

FYI, we noticed the following commit (built with gcc-11):

commit: ababeb0121d1dfee30f2b26533f8ced4fc5ad1f7 ("[PATCH RFC] block: fix use after free for bd_holder_dir/slave_dir")
url: https://github.com/intel-lab-lkp/linux/commits/Yu-Kuai/block-fix-use-after-free-for-bd_holder_dir-slave_dir/20221012-203747
base: https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-next
patch link: https://lore.kernel.org/linux-block/20221012125838.1608619-1-yukuai1@huaweicloud.com
patch subject: [PATCH RFC] block: fix use after free for bd_holder_dir/slave_dir

in testcase: mdadm-selftests
version: mdadm-selftests-x86_64-5f41845-1_20220826
with following parameters:

	disk: 1HDD
	test_prefix: 18



on test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-4790T CPU @ 2.70GHz (Haswell) with 16G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Link: https://lore.kernel.org/r/202210141333.79a532ca-oliver.sang@intel.com


Testing on linux-6.0.0-07245-gababeb0121d1 kernel
/lkp/benchmarks/mdadm-selftests/tests/18imsm-1d-takeover-r1_2d... FAILED - see /var/tmp/18imsm-1d-takeover-r1_2d.log and /var/tmp/fail18imsm-1d-takeover-r1_2d.log for details

(log is attached)


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



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