commit 9ec4ecef0af7790551109283ca039a7c52de343c ("kexec_file,x86,
powerpc: factor out kexec_file_ops functions" allows implementing
the arch-specific implementation of kernel image verification
in kexec_file_ops->verify_sig. Currently, there is no arch-specific
implementation of arch_kexec_kernel_verify_sig. So clean it up.
Suggested-by: Eric W. Biederman <[email protected]>
Signed-off-by: Coiby Xu <[email protected]>
---
include/linux/kexec.h | 4 ----
kernel/kexec_file.c | 34 +++++++++++++---------------------
2 files changed, 13 insertions(+), 25 deletions(-)
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 0c994ae37729..755fed183224 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -196,10 +196,6 @@ 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
-int arch_kexec_kernel_verify_sig(struct kimage *image, void *buf,
- unsigned long buf_len);
-#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 33400ff051a8..42b3ac34e4ee 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -89,25 +89,6 @@ int __weak arch_kimage_file_post_load_cleanup(struct kimage *image)
return kexec_image_post_load_cleanup_default(image);
}
-#ifdef CONFIG_KEXEC_SIG
-static int kexec_image_verify_sig_default(struct kimage *image, void *buf,
- unsigned long buf_len)
-{
- if (!image->fops || !image->fops->verify_sig) {
- pr_debug("kernel loader does not support signature verification.\n");
- return -EKEYREJECTED;
- }
-
- return image->fops->verify_sig(buf, buf_len);
-}
-
-int __weak arch_kexec_kernel_verify_sig(struct kimage *image, void *buf,
- unsigned long buf_len)
-{
- return kexec_image_verify_sig_default(image, buf, buf_len);
-}
-#endif
-
/*
* arch_kexec_apply_relocations_add - apply relocations of type RELA
* @pi: Purgatory to be relocated.
@@ -184,13 +165,24 @@ void kimage_file_post_load_cleanup(struct kimage *image)
}
#ifdef CONFIG_KEXEC_SIG
+static int kexec_image_verify_sig(struct kimage *image, void *buf,
+ unsigned long buf_len)
+{
+ if (!image->fops || !image->fops->verify_sig) {
+ pr_debug("kernel loader does not support signature verification.\n");
+ return -EKEYREJECTED;
+ }
+
+ return image->fops->verify_sig(buf, buf_len);
+}
+
static int
kimage_validate_signature(struct kimage *image)
{
int ret;
- ret = arch_kexec_kernel_verify_sig(image, image->kernel_buf,
- image->kernel_buf_len);
+ ret = kexec_image_verify_sig(image, image->kernel_buf,
+ image->kernel_buf_len);
if (ret) {
if (IS_ENABLED(CONFIG_KEXEC_SIG_FORCE)) {
--
2.31.1
Hi Eric,
Does this patch and "[PATCH v3 2/3] kexec, KEYS: make the code in
bzImage64_verify_sig generic" look good you?
On Mon, Oct 18, 2021 at 04:31:35PM +0800, Coiby Xu wrote:
>commit 9ec4ecef0af7790551109283ca039a7c52de343c ("kexec_file,x86,
>powerpc: factor out kexec_file_ops functions" allows implementing
>the arch-specific implementation of kernel image verification
>in kexec_file_ops->verify_sig. Currently, there is no arch-specific
>implementation of arch_kexec_kernel_verify_sig. So clean it up.
>
>Suggested-by: Eric W. Biederman <[email protected]>
>Signed-off-by: Coiby Xu <[email protected]>
>---
> include/linux/kexec.h | 4 ----
> kernel/kexec_file.c | 34 +++++++++++++---------------------
> 2 files changed, 13 insertions(+), 25 deletions(-)
>
>diff --git a/include/linux/kexec.h b/include/linux/kexec.h
>index 0c994ae37729..755fed183224 100644
>--- a/include/linux/kexec.h
>+++ b/include/linux/kexec.h
>@@ -196,10 +196,6 @@ 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
>-int arch_kexec_kernel_verify_sig(struct kimage *image, void *buf,
>- unsigned long buf_len);
>-#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 33400ff051a8..42b3ac34e4ee 100644
>--- a/kernel/kexec_file.c
>+++ b/kernel/kexec_file.c
>@@ -89,25 +89,6 @@ int __weak arch_kimage_file_post_load_cleanup(struct kimage *image)
> return kexec_image_post_load_cleanup_default(image);
> }
>
>-#ifdef CONFIG_KEXEC_SIG
>-static int kexec_image_verify_sig_default(struct kimage *image, void *buf,
>- unsigned long buf_len)
>-{
>- if (!image->fops || !image->fops->verify_sig) {
>- pr_debug("kernel loader does not support signature verification.\n");
>- return -EKEYREJECTED;
>- }
>-
>- return image->fops->verify_sig(buf, buf_len);
>-}
>-
>-int __weak arch_kexec_kernel_verify_sig(struct kimage *image, void *buf,
>- unsigned long buf_len)
>-{
>- return kexec_image_verify_sig_default(image, buf, buf_len);
>-}
>-#endif
>-
> /*
> * arch_kexec_apply_relocations_add - apply relocations of type RELA
> * @pi: Purgatory to be relocated.
>@@ -184,13 +165,24 @@ void kimage_file_post_load_cleanup(struct kimage *image)
> }
>
> #ifdef CONFIG_KEXEC_SIG
>+static int kexec_image_verify_sig(struct kimage *image, void *buf,
>+ unsigned long buf_len)
>+{
>+ if (!image->fops || !image->fops->verify_sig) {
>+ pr_debug("kernel loader does not support signature verification.\n");
>+ return -EKEYREJECTED;
>+ }
>+
>+ return image->fops->verify_sig(buf, buf_len);
>+}
>+
> static int
> kimage_validate_signature(struct kimage *image)
> {
> int ret;
>
>- ret = arch_kexec_kernel_verify_sig(image, image->kernel_buf,
>- image->kernel_buf_len);
>+ ret = kexec_image_verify_sig(image, image->kernel_buf,
>+ image->kernel_buf_len);
> if (ret) {
>
> if (IS_ENABLED(CONFIG_KEXEC_SIG_FORCE)) {
>--
>2.31.1
>
--
Best regards,
Coiby