• Gustavo A. R. Silva's avatar
    kvm: Use struct_size() in kmalloc() · 90952cd3
    Gustavo A. R. Silva authored
    One of the more common cases of allocation size calculations is finding
    the size of a structure that has a zero-sized array at the end, along
    with memory for some number of elements for that array. For example:
    
    struct foo {
        int stuff;
        void *entry[];
    };
    
    instance = kmalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);
    
    Instead of leaving these open-coded and prone to type mistakes, we can
    now use the new struct_size() helper:
    
    instance = kmalloc(struct_size(instance, entry, count), GFP_KERNEL);
    
    This code was detected with the help of Coccinelle.
    Signed-off-by: default avatarGustavo A. R. Silva <gustavo@embeddedor.com>
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    90952cd3
kvm_main.c 99.2 KB