From: hpa@zytor.com
To: Juergen Gross <jgross@suse.com>,
linux-kernel@vger.kernel.org, x86@kernel.org
Cc: sstabellini@kernel.org, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de
Subject: Re: [PATCH] x86/boot: clear rsdp address in boot_params for broken loaders
Date: Mon, 03 Dec 2018 15:07:20 -0800 [thread overview]
Message-ID: <2489CC78-0410-4F0D-9D79-7905868B51BC@zytor.com> (raw)
In-Reply-To: <20181203103811.17056-1-jgross@suse.com>
On December 3, 2018 2:38:11 AM PST, Juergen Gross <jgross@suse.com> wrote:
>In case a broken boot loader doesn't clear its struct boot_params clear
>rsdp_addr in sanitize_boot_params().
>
>This fixes commit e6e094e053af75 ("x86/acpi, x86/boot: Take RSDP
>address from boot params if available") e.g. for the case of a boot via
>systemd-boot.
>
>Fixes: e6e094e053af75 ("x86/acpi, x86/boot: Take RSDP address from boot
>params if available")
>Reported-by: Gunnar Krueger <taijian@posteo.de>
>Tested-by: Gunnar Krueger <taijian@posteo.de>
>Signed-off-by: Juergen Gross <jgross@suse.com>
>---
> arch/x86/include/asm/bootparam_utils.h | 1 +
> 1 file changed, 1 insertion(+)
>
>diff --git a/arch/x86/include/asm/bootparam_utils.h
>b/arch/x86/include/asm/bootparam_utils.h
>index a07ffd23e4dd..f6f6ef436599 100644
>--- a/arch/x86/include/asm/bootparam_utils.h
>+++ b/arch/x86/include/asm/bootparam_utils.h
>@@ -36,6 +36,7 @@ static void sanitize_boot_params(struct boot_params
>*boot_params)
> */
> if (boot_params->sentinel) {
> /* fields in boot_params are left uninitialized, clear them */
>+ boot_params->acpi_rsdp_addr = 0;
> memset(&boot_params->ext_ramdisk_image, 0,
> (char *)&boot_params->efi_info -
> (char *)&boot_params->ext_ramdisk_image);
Isn't this already covered by the memset()? If not, we should extend the memset() to maximal coverage.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
next prev parent reply other threads:[~2018-12-03 23:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-03 10:38 [PATCH] x86/boot: clear rsdp address in boot_params for broken loaders Juergen Gross
2018-12-03 15:54 ` [tip:x86/urgent] x86/boot: Clear RSDP " tip-bot for Juergen Gross
2018-12-03 23:07 ` hpa [this message]
2018-12-04 5:32 ` [PATCH] x86/boot: clear rsdp " Juergen Gross
2018-12-04 5:49 ` H. Peter Anvin
2018-12-04 6:03 ` Juergen Gross
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