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Wrong bounds initializing dwarf dies (tests_64901) ##crash

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Reported by giantbranch of NSFOCUS TIANJI Lab
This commit is contained in:
pancake 2021-11-02 11:58:25 +01:00 committed by GitHub
parent f209fcb903
commit 67b97621d1
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 20 deletions
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32
libr/bin/dwarf.c
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@ -1,18 +1,7 @@
/* radare - LGPL - Copyright 2012-2021 - pancake, Fedor Sakharov */
#define D0 if(1)
#define D1 if(1)
#include <errno.h>
#define DWARF_DUMP 0
#if DWARF_DUMP
#define DBGFD stdout
#else
#define DBGFD NULL
#endif
#include <r_bin.h>
#include <r_bin_dwarf.h>
#include <r_core.h>
@ -1203,17 +1192,17 @@ static int init_die(RBinDwarfDie *die, ut64 abbr_code, ut64 attr_count) {
return 0;
}
static int init_comp_unit(RBinDwarfCompUnit *cu) {
static bool init_comp_unit(RBinDwarfCompUnit *cu) {
if (!cu) {
return -EINVAL;
return false;
}
cu->dies = calloc (sizeof (RBinDwarfDie), COMP_UNIT_CAPACITY);
if (!cu->dies) {
return -ENOMEM;
return false;
}
cu->capacity = COMP_UNIT_CAPACITY;
cu->count = 0;
return 0;
return true;
}
static int expand_cu(RBinDwarfCompUnit *cu) {
@ -1838,6 +1827,9 @@ static const ut8 *parse_attr_value(const ut8 *obuf, int obuf_len,
value->kind = DW_AT_KIND_ADDRESS;
buf = r_uleb128 (buf, buf_end - buf, &value->address, NULL);
break;
case 0:
// ignore
break;
default:
eprintf ("Unknown DW_FORM 0x%02" PFMT64x "\n", def->attr_form);
value->uconstant = 0;
@ -1864,10 +1856,10 @@ static const ut8 *parse_die(const ut8 *buf, const ut8 *buf_end, RBinDwarfAbbrevD
if (!buf || !buf_end || buf > buf_end) {
return NULL;
}
for (i = 0; i < abbrev->count - 1; i++) {
if (die->capacity < 1) {
break;
}
for (i = 0; i < die->count; i++) {
memset (&die->attr_values[i], 0, sizeof (RBinDwarfDie));
}
for (i = 0; i < abbrev->count && i < die->capacity; i++) {
memset (&die->attr_values[i], 0, sizeof (die->attr_values[i]));
// debug_str_len = r_str_nlen (debug_str, buf_end - buf);
const ut8 *nbuf = parse_attr_value (buf, buf_end - buf,
@ -2060,7 +2052,7 @@ static RBinDwarfDebugInfo *parse_info_raw(Sdb *sdb, RBinDwarfDebugAbbrev *da,
}
RBinDwarfCompUnit *unit = &info->comp_units[unit_idx];
if (init_comp_unit (unit) < 0) {
if (!init_comp_unit (unit)) {
unit_idx--;
goto cleanup;
}