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authorJuergen Gross <jgross@suse.com>2018-12-03 11:38:11 +0100
committerIngo Molnar <mingo@kernel.org>2018-12-03 11:56:37 +0100
commit182ddd16194cd082f25fa1b063dae3c7c5cce384 (patch)
tree35dcc5ea763f432dc9da0d12c08b80af07abfa46
parent2595646791c319cadfdbf271563aac97d0843dc7 (diff)
x86/boot: Clear RSDP address in boot_params for broken loaders
Gunnar Krueger reported a systemd-boot failure and bisected it down to: e6e094e053af75 ("x86/acpi, x86/boot: Take RSDP address from boot params if available") In case a broken boot loader doesn't clear its 'struct boot_params', clear rsdp_addr in sanitize_boot_params(). Reported-by: Gunnar Krueger <taijian@posteo.de> Tested-by: Gunnar Krueger <taijian@posteo.de> Signed-off-by: Juergen Gross <jgross@suse.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bp@alien8.de Cc: sstabellini@kernel.org Fixes: e6e094e053af75 ("x86/acpi, x86/boot: Take RSDP address from boot params if available") Link: http://lkml.kernel.org/r/20181203103811.17056-1-jgross@suse.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r--arch/x86/include/asm/bootparam_utils.h1
1 files changed, 1 insertions, 0 deletions
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);