Messages in this thread | | | Date | Thu, 21 Nov 2013 01:39:19 +0000 | From | Al Viro <> | Subject | Re: [PATCH v2] fs: binfmt_elf: Add ELF header consistency checks |
| |
On Wed, Nov 20, 2013 at 09:34:31PM -0300, Geyslan G. Bem wrote: > The member 'e_ehsize' that holds the ELF header size is compared > with the elfhdr struct size. If not equal, goes out. > If 'e_phoff' holds 0 the object has no program header table, so > goes out. > Ensures the file being loaded has the correct data encoding, checking > 'e_ident[EI_DATA]' against 'ELF_DATA'. > > Besides the checks being in accordance with the ELF Specifications, > they increase the binary consistency reducing the use of malformed ones.
This is completely misguided. We are allowed to reject such binaries, but what's the point of doing that?
| |