The first patch in this series introduces four array allocation functions to replace vmalloc(array_size()) and vzalloc(array_size()), of which Linux has dozens of occurrences. The Functions take care of the multiplication and overflow check, result in simpler code and make it easier for developers to avoid overflow bugs. The other two patches start to apply the functions in the mm/ and KVM areas. In the case of KVM, it is also important to switch from kvcalloc to __vcalloc; the allocation size is driven by userspace and can be larger than 4GiB, which has been forbidden by the kv*alloc functions since 5.15. Paolo Paolo Bonzini (3): mm: vmalloc: introduce array allocation functions mm: use vmalloc_array and vcalloc for array allocations KVM: use __vcalloc for very large allocations arch/powerpc/kvm/book3s_hv_uvmem.c | 2 +- arch/x86/kvm/mmu/page_track.c | 7 +++-- arch/x86/kvm/x86.c | 4 +-- include/linux/vmalloc.h | 5 +++ mm/percpu-stats.c | 2 +- mm/swap_cgroup.c | 4 +-- mm/util.c | 50 ++++++++++++++++++++++++++++++ virt/kvm/kvm_main.c | 4 +-- 9 files changed, 66 insertions(+), 12 deletions(-) -- 2.31.1
