linux-kernel - Re: [PATCH] vmcore: replace Elf64_Ehdr/Elf32

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150916093749.GD6699@dhcp-128-62.nay.redhat.com>
Date:	Wed, 16 Sep 2015 17:37:49 +0800
From:	Dave Young <dyoung@...hat.com>
To:	yanjiang.jin@...driver.com
Cc:	akpm@...ux-foundation.org, chaowang@...hat.com,
	linux-kernel@...r.kernel.org, jinyanjiang@...il.com,
	kexec@...ts.infradead.org
Subject: Re: [PATCH] vmcore: replace Elf64_Ehdr/Elf32_Ehdr with elfhdr

Cc kexec list.

On 09/16/15 at 10:58am, yanjiang.jin@...driver.com wrote:
> From: Yanjiang Jin <yanjiang.jin@...driver.com>
> 
> Function parse_crash_elf_headers() reads e_ident[EI_CLASS] then decides to
> call parse_crash_elf64_headers() or parse_crash_elf32_headers().
> But this happens in run time, not compile time. So compiler will report
> the below warning:
> 
> In file included from include/linux/elf.h:4:0,
>                  from fs/proc/vmcore.c:13:
> fs/proc/vmcore.c: In function 'parse_crash_elf32_headers':
> arch/mips/include/asm/elf.h:258:23: warning: initializatio
> n from incompatible pointer type
>   struct elfhdr *__h = (hdr);     \
>                        ^
> fs/proc/vmcore.c:1071:4: note: in expansion of macro 'elf_
> check_arch'
>    !elf_check_arch(&ehdr) ||
>     ^
> 
> Signed-off-by: Yanjiang Jin <yanjiang.jin@...driver.com>
> ---
>  fs/proc/vmcore.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
> index 4e61388..576bb26 100644
> --- a/fs/proc/vmcore.c
> +++ b/fs/proc/vmcore.c
> @@ -999,7 +999,7 @@ static void free_elfcorebuf(void)
>  static int __init parse_crash_elf64_headers(void)
>  {
>  	int rc=0;
> -	Elf64_Ehdr ehdr;
> +	struct elfhdr ehdr;
>  	u64 addr;
>  
>  	addr = elfcorehdr_addr;
> @@ -1055,7 +1055,7 @@ fail:
>  static int __init parse_crash_elf32_headers(void)
>  {
>  	int rc=0;
> -	Elf32_Ehdr ehdr;
> +	struct elfhdr ehdr;
>  	u64 addr;
>  
>  	addr = elfcorehdr_addr;
> -- 
> 1.9.1
> 
> 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/