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3b80cac95

Denis Vlasenko
Denis Vlasenko
2008-08-28
FAILED Duration: 26s

Subject

insmod: mix xmalloc with xrealloc_vector more carefully

Binary

No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

Build Log

(log yok)

Commit Diff GitHub →

modutils/insmod.c +52 -37
modutils/insmod.c+52 -37
@@ -1059,8 +1059,9 @@ arch_apply_relocation(struct obj_file *f,
case R_68K_PC8:
v -= dot;
- if ((ElfW(Sword))v > 0x7f ||
- (ElfW(Sword))v < -(ElfW(Sword))0x80) {
+ if ((ElfW(Sword))v > 0x7f
+ || (ElfW(Sword))v < -(ElfW(Sword))0x80
+ ) {
ret = obj_reloc_overflow;
}
*(char *)loc = v;
@@ -1068,8 +1069,9 @@ arch_apply_relocation(struct obj_file *f,
case R_68K_PC16:
v -= dot;
- if ((ElfW(Sword))v > 0x7fff ||
- (ElfW(Sword))v < -(ElfW(Sword))0x8000) {
+ if ((ElfW(Sword))v > 0x7fff
+ || (ElfW(Sword))v < -(ElfW(Sword))0x8000
+ ) {
ret = obj_reloc_overflow;
}
*(short *)loc = v;
@@ -1208,8 +1210,9 @@ arch_apply_relocation(struct obj_file *f,
{
Elf32_Addr word;
- if ((Elf32_Sword)v > 0x7fff ||
- (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
+ if ((Elf32_Sword)v > 0x7fff
+ || (Elf32_Sword)v < -(Elf32_Sword)0x8000
+ ) {
ret = obj_reloc_overflow;
}
@@ -1238,8 +1241,9 @@ arch_apply_relocation(struct obj_file *f,
Elf32_Addr word;
v -= dot + 4;
- if ((Elf32_Sword)v > 0x7fff ||
- (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
+ if ((Elf32_Sword)v > 0x7fff
+ || (Elf32_Sword)v < -(Elf32_Sword)0x8000
+ ) {
ret = obj_reloc_overflow;
}
@@ -1253,9 +1257,10 @@ arch_apply_relocation(struct obj_file *f,
Elf32_Addr word, gp;
/* get _gp */
gp = obj_symbol_final_value(f, obj_find_symbol(f, SPFX "_gp"));
- v-=gp;
- if ((Elf32_Sword)v > 0x7fff ||
- (Elf32_Sword)v < -(Elf32_Sword)0x8000) {
+ v -= gp;
+ if ((Elf32_Sword)v > 0x7fff
+ || (Elf32_Sword)v < -(Elf32_Sword)0x8000
+ ) {
ret = obj_reloc_overflow;
}
@@ -2132,7 +2137,6 @@ obj_find_symbol(struct obj_file *f, const char *name)
for (sym = f->symtab[hash]; sym; sym = sym->next)
if (f->symbol_cmp(sym->name, name) == 0)
return sym;
-
return NULL;
}
@@ -2141,12 +2145,10 @@ static ElfW(Addr) obj_symbol_final_value(struct obj_file * f, struct obj_symbol
if (sym) {
if (sym->secidx >= SHN_LORESERVE)
return sym->value;
-
return sym->value + f->sections[sym->secidx]->header.sh_addr;
- } else {
- /* As a special case, a NULL sym has value zero. */
- return 0;
}
+ /* As a special case, a NULL sym has value zero. */
+ return 0;
}
static struct obj_section *obj_find_section(struct obj_file *f, const char *name)
@@ -2156,7 +2158,6 @@ static struct obj_section *obj_find_section(struct obj_file *f, const char *name
for (i = 0; i < n; ++i)
if (strcmp(f->sections[i]->name, name) == 0)
return f->sections[i];
-
return NULL;
}
@@ -2167,9 +2168,11 @@ static int obj_load_order_prio(struct obj_section *a)
af = a->header.sh_flags;
ac = 0;
- if (a->name[0] != '.' || strlen(a->name) != 10 ||
- strcmp(a->name + 5, ".init"))
+ if (a->name[0] != '.' || strlen(a->name) != 10
+ || strcmp(a->name + 5, ".init") != 0
+ ) {
ac |= 32;
+ }
if (af & SHF_ALLOC)
ac |= 16;
if (!(af & SHF_WRITE))
@@ -2856,18 +2859,19 @@ static int new_create_module_ksymtab(struct obj_file *f)
/* We don't want to export symbols residing in sections that
aren't loaded. There are a number of these created so that
we make sure certain module options don't appear twice. */
-
- loaded = alloca(sizeof(int) * (i = f->header.e_shnum));
+ i = f->header.e_shnum;
+ loaded = alloca(sizeof(int) * i);
while (--i >= 0)
loaded[i] = (f->sections[i]->header.sh_flags & SHF_ALLOC) != 0;
for (nsyms = i = 0; i < HASH_BUCKETS; ++i) {
struct obj_symbol *sym;
- for (sym = f->symtab[i]; sym; sym = sym->next)
+ for (sym = f->symtab[i]; sym; sym = sym->next) {
if (ELF_ST_BIND(sym->info) != STB_LOCAL
&& sym->secidx <= SHN_HIRESERVE
&& (sym->secidx >= SHN_LORESERVE
- || loaded[sym->secidx])) {
+ || loaded[sym->secidx])
+ ) {
ElfW(Addr) ofs = nsyms * 2 * tgt_sizeof_void_p;
obj_symbol_patch(f, sec->idx, ofs, sym);
@@ -2876,6 +2880,7 @@ static int new_create_module_ksymtab(struct obj_file *f)
nsyms++;
}
+ }
}
obj_extend_section(sec, nsyms * 2 * tgt_sizeof_char_p);
@@ -2934,9 +2939,11 @@ new_init_module(const char *m_name, struct obj_file *f, unsigned long m_size)
}
sec = obj_find_section(f, ".data.init");
if (sec) {
- if (!module->runsize ||
- module->runsize > sec->header.sh_addr - m_addr)
+ if (!module->runsize
+ || module->runsize > sec->header.sh_addr - m_addr
+ ) {
module->runsize = sec->header.sh_addr - m_addr;
+ }
}
sec = obj_find_section(f, ARCHDATA_SEC_NAME);
if (sec && sec->header.sh_size) {
@@ -3219,8 +3226,8 @@ static int obj_relocate(struct obj_file *f, ElfW(Addr) base)
#if SHT_RELM == SHT_RELA
#if defined(__alpha__) && defined(AXP_BROKEN_GAS)
/* Work around a nasty GAS bug, that is fixed as of 2.7.0.9. */
- if (!extsym || !extsym->st_name ||
- ELF_ST_BIND(extsym->st_info) != STB_LOCAL)
+ if (!extsym || !extsym->st_name
+ || ELF_ST_BIND(extsym->st_info) != STB_LOCAL)
#endif
value += rel->r_addend;
#endif
@@ -3326,16 +3333,17 @@ static struct obj_file *obj_load(FILE *fp, int loadprogbits UNUSED_PARAM)
}
if (f->header.e_ident[EI_MAG0] != ELFMAG0
- || f->header.e_ident[EI_MAG1] != ELFMAG1
- || f->header.e_ident[EI_MAG2] != ELFMAG2
- || f->header.e_ident[EI_MAG3] != ELFMAG3) {
+ || f->header.e_ident[EI_MAG1] != ELFMAG1
+ || f->header.e_ident[EI_MAG2] != ELFMAG2
+ || f->header.e_ident[EI_MAG3] != ELFMAG3
+ ) {
bb_error_msg_and_die("not an ELF file");
}
if (f->header.e_ident[EI_CLASS] != ELFCLASSM
- || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN
- ? ELFDATA2MSB : ELFDATA2LSB)
- || f->header.e_ident[EI_VERSION] != EV_CURRENT
- || !MATCH_MACHINE(f->header.e_machine)) {
+ || f->header.e_ident[EI_DATA] != (BB_BIG_ENDIAN ? ELFDATA2MSB : ELFDATA2LSB)
+ || f->header.e_ident[EI_VERSION] != EV_CURRENT
+ || !MATCH_MACHINE(f->header.e_machine)
+ ) {
bb_error_msg_and_die("ELF file not for this architecture");
}
if (f->header.e_type != ET_REL) {
@@ -3351,7 +3359,10 @@ static struct obj_file *obj_load(FILE *fp, int loadprogbits UNUSED_PARAM)
}
shnum = f->header.e_shnum;
- f->sections = xzalloc(sizeof(struct obj_section *) * shnum);
+ /* Growth of ->sections vector will be done by
+ * xrealloc_vector(..., 2, ...), therefore we must allocate
+ * at least 2^2 = 4 extra elements here. */
+ f->sections = xzalloc(sizeof(f->sections[0]) * (shnum + 4));
section_headers = alloca(sizeof(ElfW(Shdr)) * shnum);
fseek(fp, f->header.e_shoff, SEEK_SET);
@@ -3855,16 +3866,20 @@ static void print_load_map(struct obj_file *f)
for (nsyms = i = 0; i < HASH_BUCKETS; ++i)
for (sym = f->symtab[i]; sym; sym = sym->next)
if (sym->secidx <= SHN_HIRESERVE
- && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
+ && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx])
+ ) {
++nsyms;
+ }
all = alloca(nsyms * sizeof(struct obj_symbol *));
for (i = 0, p = all; i < HASH_BUCKETS; ++i)
for (sym = f->symtab[i]; sym; sym = sym->next)
if (sym->secidx <= SHN_HIRESERVE
- && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx]))
+ && (sym->secidx >= SHN_LORESERVE || loaded[sym->secidx])
+ ) {
*p++ = sym;
+ }
/* And list them. */
printf("\nSymbols:\n");