diff options
| -rw-r--r-- | src/ldso/dynlink.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c index 59ec5b79..f4988e73 100644 --- a/src/ldso/dynlink.c +++ b/src/ldso/dynlink.c @@ -320,6 +320,10 @@ static void *map_library(int fd, struct dso *dso) ssize_t l = read(fd, buf, sizeof buf); if (l<(int)sizeof *eh) return 0; eh = buf; + if (eh->e_type != ET_DYN && eh->e_type != ET_EXEC) { + errno = ENOEXEC; + return 0; + } phsize = eh->e_phentsize * eh->e_phnum; if (phsize + sizeof *eh > l) return 0; if (eh->e_phoff + phsize > l) { @@ -362,6 +366,12 @@ static void *map_library(int fd, struct dso *dso) * amount of virtual address space to map over later. */ map = mmap((void *)addr_min, map_len, prot, MAP_PRIVATE, fd, off_start); if (map==MAP_FAILED) return 0; + /* If the loaded file is not relocatable and the requested address is + * not available, then the load operation must fail. */ + if (eh->e_type != ET_DYN && addr_min && map!=(void *)addr_min) { + errno = EBUSY; + goto error; + } base = map - addr_min; dso->phdr = 0; dso->phnum = 0; |