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check fseek return value

This commit is contained in:
David du Colombier 2017-07-28 12:07:21 +02:00
parent 14623df650
commit 5c2bbfe598
1 changed files with 20 additions and 9 deletions
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29
elf.c
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@ -120,7 +120,8 @@ readelf32ehdr(FILE *f, Fhdr *fp)
p = buf;
fseek(f, 0, SEEK_SET);
if (fseek(f, 0, SEEK_SET) < 0)
return -1;
if (fread(p, fp->ehsize, 1, f) != 1)
return -1;
@ -190,7 +191,8 @@ readelf64ehdr(FILE *f, Fhdr *fp)
p = buf;
fseek(f, 0, SEEK_SET);
if (fseek(f, 0, SEEK_SET) < 0)
return -1;
if (fread(p, fp->ehsize , 1, f) != 1)
return -1;
@ -454,7 +456,8 @@ readident(FILE *f, Fhdr *fp)
unsigned int i;
uint8_t *p;
fseek(f, 0, SEEK_SET);
if (fseek(f, 0, SEEK_SET) < 0)
return -1;
p = buf;
if (fread(p, EI_NIDENT, 1, f) != 1)
@ -526,7 +529,8 @@ readelfshdrs(FILE *f, Fhdr *fp)
{
unsigned int i;
fseek(f, fp->shoff, SEEK_SET);
if (fseek(f, fp->shoff, SEEK_SET) < 0)
return -1;
for (i = 0; i < fp->shnum; i++) {
if (fp->readelfshdr(f, fp) < 0)
@ -544,7 +548,8 @@ readelfphdrs(FILE *f, Fhdr *fp)
{
unsigned int i;
fseek(f, fp->phoff, SEEK_SET);
if (fseek(f, fp->phoff, SEEK_SET) < 0)
return -1;
for (i = 0; i < fp->phnum; i++) {
if (fp->readelfphdr(f, fp) < 0)
@ -563,7 +568,8 @@ readelf32strndx(FILE *f, Fhdr *fp)
uint8_t buf[Sh32sz];
Elf32_Shdr sh;
fseek(f, fp->shoff + fp->shstrndx * fp->shentsize, SEEK_SET);
if (fseek(f, fp->shoff + fp->shstrndx * fp->shentsize, SEEK_SET) < 0)
return -1;
if (fread(buf, fp->shentsize, 1, f) != 1)
return -1;
@ -586,7 +592,8 @@ readelf64strndx(FILE *f, Fhdr *fp)
uint8_t buf[Sh64sz];
Elf64_Shdr sh;
fseek(f, fp->shoff + fp->shstrndx * fp->shentsize, SEEK_SET);
if (fseek(f, fp->shoff + fp->shstrndx * fp->shentsize, SEEK_SET) < 0)
return -1;
if (fread(buf, fp->shentsize, 1, f) != 1)
return -1;
@ -609,7 +616,10 @@ newsection(FILE *f, uint64_t offset, uint64_t size)
if (sect == NULL)
return NULL;
fseek(f, offset, SEEK_SET);
if (fseek(f, offset, SEEK_SET) < 0) {
free(sect);
return NULL;
}
if (fread(sect, size, 1, f) != 1) {
free(sect);
@ -663,7 +673,8 @@ readelfsect(FILE *f, char *name, Fhdr *fp)
unsigned int i;
char *n;
fseek(f, fp->shoff, SEEK_SET);
if (fseek(f, fp->shoff, SEEK_SET) < 0)
return NULL;
for (i = 0; i < fp->shnum; i++) {
if (fp->readelfshdr(f, fp) < 0)