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Date: Fri, 4 Mar 2022 10:03:40 +0800 From: Coiby Xu <coiby.xu@...il.com> To: kexec@...ts.infradead.org Cc: linux-arm-kernel@...ts.infradead.org, Baoquan He <bhe@...hat.com>, Dave Young <dyoung@...hat.com>, Will Deacon <will@...nel.org>, "Eric W . Biederman" <ebiederm@...ssion.com>, Coiby Xu <coxu@...hat.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)) Subject: [RESEND PATCH v3 2/3] kexec, KEYS: make the code in bzImage64_verify_sig generic From: Coiby Xu <coxu@...hat.com> The code in bzImage64_verify_sig could make use of system keyrings including .buitin_trusted_keys, .secondary_trusted_keys and .platform keyring to verify signed kernel image as PE file. Make it generic so both x86_64 and arm64 can use it. Signed-off-by: Coiby Xu <coiby.xu@...il.com> --- arch/x86/kernel/kexec-bzimage64.c | 13 +------------ include/linux/kexec.h | 7 +++++++ kernel/kexec_file.c | 17 +++++++++++++++++ 3 files changed, 25 insertions(+), 12 deletions(-) diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c index 170d0fd68b1f..f73aab3fde33 100644 --- a/arch/x86/kernel/kexec-bzimage64.c +++ b/arch/x86/kernel/kexec-bzimage64.c @@ -17,7 +17,6 @@ #include <linux/kernel.h> #include <linux/mm.h> #include <linux/efi.h> -#include <linux/verification.h> #include <asm/bootparam.h> #include <asm/setup.h> @@ -531,17 +530,7 @@ static int bzImage64_cleanup(void *loader_data) #ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) { - int ret; - - ret = verify_pefile_signature(kernel, kernel_len, - VERIFY_USE_SECONDARY_KEYRING, - VERIFYING_KEXEC_PE_SIGNATURE); - if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { - ret = verify_pefile_signature(kernel, kernel_len, - VERIFY_USE_PLATFORM_KEYRING, - VERIFYING_KEXEC_PE_SIGNATURE); - } - return ret; + return kexec_kernel_verify_pe_sig(kernel, kernel_len); } #endif diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 755fed183224..2fe39e946988 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -19,6 +19,7 @@ #include <asm/io.h> #include <uapi/linux/kexec.h> +#include <linux/verification.h> #ifdef CONFIG_KEXEC_CORE #include <linux/list.h> @@ -196,6 +197,12 @@ int arch_kexec_apply_relocations(struct purgatory_info *pi, const Elf_Shdr *relsec, const Elf_Shdr *symtab); int arch_kimage_file_post_load_cleanup(struct kimage *image); +#ifdef CONFIG_KEXEC_SIG +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION +int kexec_kernel_verify_pe_sig(const char *kernel, + unsigned long kernel_len); +#endif +#endif int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf); extern int kexec_add_buffer(struct kexec_buf *kbuf); diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 3720435807eb..754885b96aab 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -165,6 +165,23 @@ void kimage_file_post_load_cleanup(struct kimage *image) } #ifdef CONFIG_KEXEC_SIG +#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION +int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len) +{ + int ret; + + ret = verify_pefile_signature(kernel, kernel_len, + VERIFY_USE_SECONDARY_KEYRING, + VERIFYING_KEXEC_PE_SIGNATURE); + if (ret == -ENOKEY && IS_ENABLED(CONFIG_INTEGRITY_PLATFORM_KEYRING)) { + ret = verify_pefile_signature(kernel, kernel_len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_KEXEC_PE_SIGNATURE); + } + return ret; +} +#endif + static int kexec_image_verify_sig(struct kimage *image, void *buf, unsigned long buf_len) { -- 2.34.1
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