[LU-15013] potential null pointer access in osc_prep_async_page

Sun, 10 Oct 2021 13:42:15 +0000

Introduced by https://review.whamcloud.com/44338

        while (--max_scans > 0 &&
               (cli = list_first_entry_or_null(&cache->ccc_lru,
                                               struct client_obd,
                                               cl_lru_osc)) != NULL) {
...
                }
        }
        spin_unlock(&cache->ccc_lru_lock);out:
        cl_env_put(env, &refcheck);
        CDEBUG(D_CACHE, "%s: cli %p freed %ld pages.\n",
                cli_name(cli), cli, rc);

So now once that cli is NULL we exit and cli_name dereference will get us if +cache is in the debug flags.

Whamcloud Community JIRA

[LU-15013] potential null pointer access in osc_prep_async_page