Hi Dave, I have a corrupt vmcore file (for ARM) that makes crash loop forever. The problem is in memory.c, function max_cpudata_limit. The last part of that function: if (VALID_MEMBER(kmem_list3_shared) && VALID_MEMBER(kmem_cache_s_lists) && readmem(kmem_cache_nodelists(cache), KVADDR, &start_address[0], sizeof(ulong) * vt->kmem_cache_len_nodes, "array nodelist array", RETURN_ON_ERROR)) { for (i = 0; i < vt->kmem_cache_len_nodes; i++) { if (start_address[i] == 0) continue; if (readmem(start_address[i] + OFFSET(kmem_list3_shared), KVADDR, &shared, sizeof(void *), "kmem_list3 shared", RETURN_ON_ERROR|QUIET)) { if (!shared) break; } if (readmem(shared + OFFSET(array_cache_limit), KVADDR, &limit, sizeof(int), "shared array_cache limit", RETURN_ON_ERROR|QUIET)) { if (limit > max_limit) max_limit = limit; break; } } } FREEBUF(start_address); return max_limit; bail_out: vt->flags |= KMEM_CACHE_UNAVAIL; error(INFO, "unable to initialize kmem slab cache subsystem\n\n"); *cpus = 0; return 0; The problem is that the readmem statement “if (readmem(start_address[i] + OFFSET(kmem_list3_shared), …..” fails, and then the function max_cpudata_limit is called over and over again. I did a patch adding “else goto bail_out;” if the readmem fails and then crash managed to continue. I do not know if this is really a good idea. As this seems only to be a problem for corrupt vmcore files I do not know if you want to do anything about it. Best regards Jan |
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