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5507 libelf may overflow data buffer when translating data to memory representation

*** 25,46 **** */ /* Copyright (c) 1988 AT&T */ /* All Rights Reserved */ - #pragma ident "%Z%%M% %I% %E% SMI" - /* * This stuff used to live in cook.c, but was moved out to * facilitate dual (Elf32 and Elf64) compilation. See block * comment in cook.c for more info. */ #include <string.h> #include <ar.h> #include <stdlib.h> #include <errno.h> #include "decl.h" #include "member.h" #include "msg.h" /* --- 25,45 ---- */ /* Copyright (c) 1988 AT&T */ /* All Rights Reserved */ /* * This stuff used to live in cook.c, but was moved out to * facilitate dual (Elf32 and Elf64) compilation. See block * comment in cook.c for more info. */ #include <string.h> #include <ar.h> #include <stdlib.h> #include <errno.h> + #include <sys/sysmacros.h> #include "decl.h" #include "member.h" #include "msg.h" /*
*** 175,185 **** d->db_data.d_type = _elf_mtype(elf, sh->sh_type, work); d->db_data.d_buf = 0; d->db_data.d_off = 0; fsz = elf_fsize(d->db_data.d_type, 1, elf->ed_version); msz = _elf_msize(d->db_data.d_type, elf->ed_version); ! d->db_data.d_size = (sh->sh_size / fsz) * msz; d->db_shsz = sh->sh_size; d->db_raw = 0; d->db_buf = 0; d->db_uflags = 0; d->db_myflags = 0; --- 174,184 ---- d->db_data.d_type = _elf_mtype(elf, sh->sh_type, work); d->db_data.d_buf = 0; d->db_data.d_off = 0; fsz = elf_fsize(d->db_data.d_type, 1, elf->ed_version); msz = _elf_msize(d->db_data.d_type, elf->ed_version); ! d->db_data.d_size = MAX(sh->sh_size, (sh->sh_size / fsz) * msz); d->db_shsz = sh->sh_size; d->db_raw = 0; d->db_buf = 0; d->db_uflags = 0; d->db_myflags = 0;