Messages in this thread Patch in this message | | | Date | Tue, 4 Jun 2019 18:23:43 -0500 | From | "Gustavo A. R. Silva" <> | Subject | [PATCH] kernel: module: Use struct_size() helper |
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Make use of the struct_size() helper instead of an open-coded version in order to avoid any potential type mistakes, in particular in the context in which this code is being used.
So, replace the following form:
sizeof(*sect_attrs) + nloaded * sizeof(sect_attrs->attrs[0]
with:
struct_size(sect_attrs, attrs, nloaded)
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> --- kernel/module.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/kernel/module.c b/kernel/module.c index 80c7c09584cf..3f3bb090fbf4 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -1492,8 +1492,7 @@ static void add_sect_attrs(struct module *mod, const struct load_info *info) for (i = 0; i < info->hdr->e_shnum; i++) if (!sect_empty(&info->sechdrs[i])) nloaded++; - size[0] = ALIGN(sizeof(*sect_attrs) - + nloaded * sizeof(sect_attrs->attrs[0]), + size[0] = ALIGN(struct_size(sect_attrs, attrs, nloaded), sizeof(sect_attrs->grp.attrs[0])); size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]); sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL); -- 2.21.0
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