[lkml]   [2004]   [Jan]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH][RFC] invalid ELF binaries can execute - better sanity checking

    > I've always had little confidence in the elf loader. The problem is
    > complex, the code quality is not high and the consequences of an error are
    > severe.

    One thing I noticed is that we only obey execute permission on load
    sections. On ppc32 the PLT is in the bss area and must be executable:

    [27] .sbss PROGBITS 100ba10c 0aa10c 000a14 00 WA 0 0 8
    [28] .plt PROGBITS 100bab20 0aab20 000834 00 WAX 0 0 4
    [29] .bss NOBITS 100bb358 0ab354 003f90 00 WA 0 0 8

    When I did per page execute for ppc64 we fell apart because the current
    elf loader just creates a single region of non executable memory
    regardless of what the binary asks for.

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:59    [W:0.018 / U:7.568 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site