From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Austin Kim <austindh.kim@gmail.com>
Cc: matthias.schiffer@ew.tq-group.com, info@metux.net,
linux-arm-kernel@lists.infradead.org, allison@lohutok.net,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] ARM: module: Drop 'rel->r_offset < 0' always false statement
Date: Wed, 11 Sep 2019 10:40:32 +0100 [thread overview]
Message-ID: <20190911094031.GU13294@shell.armlinux.org.uk> (raw)
In-Reply-To: <20190911045408.GA62424@LGEARND20B15>
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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next prev parent reply other threads:[~2019-09-11 9:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-11 4:54 [PATCH] ARM: module: Drop 'rel->r_offset < 0' always false statement Austin Kim
2019-09-11 9:40 ` Russell King - ARM Linux admin [this message]
2019-09-11 11:42 ` Austin Kim
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