D5112.id12809.diff
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	Index: libexec/rtld-elf/map_object.c
	===================================================================
	--- libexec/rtld-elf/map_object.c
	+++ libexec/rtld-elf/map_object.c
	@@ -327,6 +327,18 @@
	get_elf_header(int fd, const char *path)
	{
	Elf_Ehdr *hdr;
	+ struct stat sb;
	+
	+ /* Make sure file has enough data for the ELF header */
	+ if (fstat(fd, &sb) == -1) {
	+ _rtld_error("%s: get stat error: %s", path,
	+ rtld_strerror(errno));
	+ return (NULL);
	+ }
	+ if (sb.st_size < sizeof(Elf_Ehdr)) {
	+ _rtld_error("%s: invalid file format", path);
	+ return (NULL);
	+ }

	hdr = mmap(NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE \| MAP_PREFAULT_READ,
	fd, 0);