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SubjectRe: [PATCH] ARM: module: Drop 'rel->r_offset < 0' always false statement
On Wed, Sep 11, 2019 at 01:54:08PM +0900, Austin Kim wrote:
> Since rel->r_offset is declared as Elf32_Addr,
> this value is always non-negative.
> typedef struct elf32_rel {
> Elf32_Addr r_offset;
> Elf32_Word r_info;
> } Elf32_Rel;
>
> typedef __u32 Elf32_Addr;
> typedef unsigned int __u32;
>
> Drop 'rel->r_offset < 0' statement which is always false.
>
> Signed-off-by: Austin Kim <austindh.kim@gmail.com>
> ---
> arch/arm/kernel/module.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
> index deef17f..0921ce7 100644
> --- a/arch/arm/kernel/module.c
> +++ b/arch/arm/kernel/module.c
> @@ -92,7 +92,7 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
> sym = ((Elf32_Sym *)symsec->sh_addr) + offset;
> symname = strtab + sym->st_name;
>
> - if (rel->r_offset < 0 || rel->r_offset > dstsec->sh_size - sizeof(u32)) {
> + if (rel->r_offset > dstsec->sh_size - sizeof(u32)) {
> pr_err("%s: section %u reloc %u sym '%s': out of bounds relocation, offset %d size %u\n",

Also change %d to %u here.

> module->name, relindex, i, symname,
> rel->r_offset, dstsec->sh_size);
> --
> 2.6.2
>
>

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