With Solar Designer <solar@openwall.com>

The following patch changes the following on ELF parsing/loading code
(fs/binfmt_elf):

- Stronger validity checks on ELF files:
        treat e_phnum (program header count) < 1 as invalid
        treat p_filesz (file size) < 2 invalid on program header interp. case
 - Saner return error codes
 - Make sure SIGKILL is delivered on error handling
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>