Both e_shentsize and e_shstrndx are uint16, so the product
  elf_header.e_shentsize * elf_header.e_shstrndx
can overflow the promoted type int (MAX_UINT16 * MAX_UINT16 > MAX_INT),
which is undefined behavior. Not sure if it can affect any real cases
or not, though.

Cast e_shentsize to loff_t instead of e_shoff.
This makes both multiplication and addition to use loff_t type.

PiperOrigin-RevId: 511254775
Change-Id: I39c493bfb539cca6742aae807c50718d31e7c001