• Vivek Goyal's avatar
    kexec: move segment verification code in a separate function · dabe7862
    Vivek Goyal authored
    Previously do_kimage_alloc() will allocate a kimage structure, copy
    segment list from user space and then do the segment list sanity
    verification.
    
    Break down this function in 3 parts.  do_kimage_alloc_init() to do actual
    allocation and basic initialization of kimage structure.
    copy_user_segment_list() to copy segment list from user space and
    sanity_check_segment_list() to verify the sanity of segment list as passed
    by user space.
    
    In later patches, I need to only allocate kimage and not copy segment list
    from user space.  So breaking down in smaller functions enables re-use of
    code at other places.
    Signed-off-by: default avatarVivek Goyal <vgoyal@redhat.com>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: Michael Kerrisk <mtk.manpages@gmail.com>
    Cc: Yinghai Lu <yinghai@kernel.org>
    Cc: Eric Biederman <ebiederm@xmission.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Matthew Garrett <mjg59@srcf.ucam.org>
    Cc: Greg Kroah-Hartman <greg@kroah.com>
    Cc: Dave Young <dyoung@redhat.com>
    Cc: WANG Chao <chaowang@redhat.com>
    Cc: Baoquan He <bhe@redhat.com>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    dabe7862
kexec.c 43.2 KB