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include/linux/overflow.h includes helper macros intended for calculating sizes of allocations. These macros prevent accidental overflow by saturating at SIZE_MAX. In general when calculating such sizes use of the macros is preferred. Add a semantic patch which can detect code patterns which can be replaced by struct_size. Note that I set the confidence to medium because this patch doesn't make an attempt to ensure that the relevant array is actually a flexible array. The struct_size macro does specifically require a flexible array. In many cases the detected code could be refactored to a flexible array, but this is not always possible (such as if there are multiple over-allocations). Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Link: https://lore.kernel.org/r/20230227202428.3657443-1-jacob.e.keller@intel.com Signed-off-by: Kees Cook <keescook@chromium.org> |
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| .. | ||
| add_namespace.cocci | ||
| array_size_dup.cocci | ||
| array_size.cocci | ||
| badty.cocci | ||
| boolconv.cocci | ||
| cond_no_effect.cocci | ||
| cstptr.cocci | ||
| do_div.cocci | ||
| doubleinit.cocci | ||
| excluded_middle.cocci | ||
| flexible_array.cocci | ||
| ifcol.cocci | ||
| irqf_oneshot.cocci | ||
| minmax.cocci | ||
| newline_in_nl_msg.cocci | ||
| noderef.cocci | ||
| of_table.cocci | ||
| orplus.cocci | ||
| returnvar.cocci | ||
| semicolon.cocci | ||
| struct_size.cocci | ||
| swap.cocci | ||
| test_addr.cocci | ||
| uninitialized_var.cocci | ||
| warn.cocci | ||