linux-kernel - Re: [PATCH 1/2] riscv: process: use unsigned int instead of unsigned long for put

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: <58244005-b071-4e21-ade1-8cdf4b35664f@ghiti.fr>
Date: Sat, 31 May 2025 14:29:10 +0200
From: Alexandre Ghiti <alex@...ti.fr>
To: Clément Léger <cleger@...osinc.com>,
 linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>
Subject: Re: [PATCH 1/2] riscv: process: use unsigned int instead of unsigned
 long for put_user()

Hi Clément,

On 5/30/25 22:56, Clément Léger wrote:
> The specification of prctl() for GET_UNALIGN_CTL states that the value is
> returned in an unsigned int * address passed as an unsigned long. Change
> the type to match that and avoid an unaligned access as well.
>
> Signed-off-by: Clément Léger <cleger@...osinc.com>
> ---
>   arch/riscv/kernel/process.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
> index 15d8f75902f8..9ee6d816b98b 100644
> --- a/arch/riscv/kernel/process.c
> +++ b/arch/riscv/kernel/process.c
> @@ -57,7 +57,7 @@ int get_unalign_ctl(struct task_struct *tsk, unsigned long adr)
>   	if (!unaligned_ctl_available())
>   		return -EINVAL;
>   
> -	return put_user(tsk->thread.align_ctl, (unsigned long __user *)adr);
> +	return put_user(tsk->thread.align_ctl, (unsigned int __user *)adr);
>   }
>   
>   void __show_regs(struct pt_regs *regs)


Reviewed-by: Alexandre Ghiti <alexghiti@...osinc.com>

Thanks,

Alex