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There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. struct uv_rtc_timer_head contains a one-element array cpu[1]. Switch it to a flexible array and use the struct_size() helper to calculate the allocation size. Also, save some heap space in the process[3]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.9-rc1/process/deprecated.html#zero-length-and-one-element-arrays [3] https://lore.kernel.org/lkml/20200518190114.GA7757@embeddedor/ [ bp: Massage a bit. ] Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: Steve Wahl <steve.wahl@hpe.com> Link: https://lkml.kernel.org/r/20201001145608.GA10204@embeddedor |
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