• Kees Cook's avatar
    treewide: Use struct_size() for devm_kmalloc() and friends · 0ed2dd03
    Kees Cook authored
    Replaces open-coded struct size calculations with struct_size() for
    devm_*, f2fs_*, and sock_* allocations. Automatically generated (and
    manually adjusted) from the following Coccinelle script:
    
    // Direct reference to struct field.
    @@
    identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc";
    expression HANDLE;
    expression GFP;
    identifier VAR, ELEMENT;
    expression COUNT;
    @@
    
    - alloc(HANDLE, sizeof(*VAR) + COUNT * sizeof(*VAR->ELEMENT), GFP)
    + alloc(HANDLE, struct_size(VAR, ELEMENT, COUNT), GFP)
    
    // mr = kzalloc(sizeof(*mr) + m * sizeof(mr->map[0]), GFP_KERNEL);
    @@
    identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc";
    expression HANDLE;
    expression GFP;
    identifier VAR, ELEMENT;
    expression COUNT;
    @@
    
    - alloc(HANDLE, sizeof(*VAR) + COUNT * sizeof(VAR->ELEMENT[0]), GFP)
    + alloc(HANDLE, struct_size(VAR, ELEMENT, COUNT), GFP)
    
    // Same pattern, but can't trivially locate the trailing element name,
    // or variable name.
    @@
    identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc";
    expression HANDLE;
    expression GFP;
    expression SOMETHING, COUNT, ELEMENT;
    @@
    
    - alloc(HANDLE, sizeof(SOMETHING) + COUNT * sizeof(ELEMENT), GFP)
    + alloc(HANDLE, CHECKME_struct_size(&SOMETHING, ELEMENT, COUNT), GFP)
    Signed-off-by: 's avatarKees Cook <keescook@chromium.org>
    0ed2dd03
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