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scst_lib: Fix mem access after free

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Fixes: https://github.com/SCST-project/scst/issues/204
This commit is contained in:
Gleb Chesnokov
2023-12-27 23:04:18 +03:00
parent 56a6be7ddf
commit 5716ffa737
1 changed files with 8 additions and 5 deletions
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13
scst/src/scst_lib.c
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@@ -4505,15 +4505,18 @@ out_on_del:
scst_cm_on_del_lun(acg_dev, false);
out_free:
/*
* synchronize_rcu() does not have to be called here because the
* tgt_devs that will be freed have never been on any of the
* sess->sess_tgt_dev_list[] lists.
*/
list_for_each_entry_safe(tgt_dev, tt, &tmp_tgt_dev_list,
extra_tgt_dev_list_entry) {
sess = tgt_dev->sess;
mutex_lock(&sess->tgt_dev_list_mutex);
scst_del_tgt_dev(tgt_dev);
mutex_unlock(&sess->tgt_dev_list_mutex);
synchronize_rcu();
scst_free_tgt_dev(tgt_dev);
}
scst_del_free_acg_dev(acg_dev, false);
goto out;
}