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Date: Fri, 7 Jun 2019 13:53:14 -0500 From: "Gustavo A. R. Silva" <gustavo@...eddedor.com> To: Ohad Ben-Cohen <ohad@...ery.com>, Bjorn Andersson <bjorn.andersson@...aro.org> Cc: linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org, "Gustavo A. R. Silva" <gustavo@...eddedor.com> Subject: [PATCH] remoteproc: Use struct_size() helper 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 resource_table { ... u32 offset[0]; } __packed; Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes. So, replace the following form: table->num * sizeof(table->offset[0]) + sizeof(struct resource_table) with: struct_size(table, offset, table->num) This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com> --- drivers/remoteproc/remoteproc_elf_loader.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c index 215a4400f21e..606aae166eba 100644 --- a/drivers/remoteproc/remoteproc_elf_loader.c +++ b/drivers/remoteproc/remoteproc_elf_loader.c @@ -247,8 +247,7 @@ find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size) } /* make sure the offsets array isn't truncated */ - if (table->num * sizeof(table->offset[0]) + - sizeof(struct resource_table) > size) { + if (struct_size(table, offset, table->num) > size) { dev_err(dev, "resource table incomplete\n"); return NULL; } -- 2.21.0
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