• Linus Torvalds's avatar
    [PATCH] prevent NULL mmap in topdown model · 49a43876
    Linus Torvalds authored
    Prevent the topdown allocator from allocating mmap areas all the way
    down to address zero.
    
    We still allow a MAP_FIXED mapping of page 0 (needed for various things,
    ranging from Wine and DOSEMU to people who want to allow speculative
    loads off a NULL pointer).
    
    Tested by Chris Wright.
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    49a43876
mmap.c 52.7 KB