This patch applied SNAPSHOT_VERIFICATION kernel config for switching
signature check of hibernate snapshot image.
v2:
Moved CONFIG_SNAPSHOT_VERIFICATION to earlier patch.
Signed-off-by: Lee, Chun-Yi
Cc: Takashi Iwai
---
kernel/power/hibernate.c | 6 ++++++
kernel/power/snapshot.c | 23 +++++++++++++++++++++++
kernel/power/swap.c | 28 ++++++++++++++++++----------
kernel/power/user.c | 6 ++++++
4 files changed, 69 insertions(+), 13 deletions(-)
Index: linux/kernel/power/snapshot.c
===================================================================
--- linux.orig/kernel/power/snapshot.c
+++ linux/kernel/power/snapshot.c
@@ -1052,6 +1052,8 @@ copy_data_pages(struct memory_bitmap *co
{
struct zone *zone;
unsigned long pfn, dst_pfn;
+
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
struct page *d_page;
void *hash_buffer = NULL;
struct crypto_shash *tfm;
@@ -1083,6 +1085,7 @@ copy_data_pages(struct memory_bitmap *co
ret = crypto_shash_init(desc);
if (ret < 0)
goto error_shash;
+#endif /* CONFIG_SNAPSHOT_VERIFICATION */
for_each_populated_zone(zone) {
unsigned long max_zone_pfn;
@@ -1102,6 +1105,7 @@ copy_data_pages(struct memory_bitmap *co
dst_pfn = memory_bm_next_pfn(copy_bm);
copy_data_page(dst_pfn, pfn);
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
/* Generate digest */
d_page = pfn_to_page(dst_pfn);
if (PageHighMem(d_page)) {
@@ -1116,8 +1120,10 @@ copy_data_pages(struct memory_bitmap *co
ret = crypto_shash_update(desc, hash_buffer, PAGE_SIZE);
if (ret)
goto error_shash;
+#endif
}
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
crypto_shash_final(desc, digest);
if (ret)
goto error_shash;
@@ -1147,9 +1153,11 @@ copy_data_pages(struct memory_bitmap *co
kfree(pks);
kfree(digest);
crypto_free_shash(tfm);
+#endif /* CONFIG_SNAPSHOT_VERIFICATION */
return 0;
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
error_sign:
destroy_sign_key(s4_sign_key);
error_key:
@@ -1158,6 +1166,7 @@ error_shash:
error_digest:
crypto_free_shash(tfm);
return ret;
+#endif
}
/* Total number of image pages */
@@ -2303,7 +2312,9 @@ static void *get_buffer(struct memory_bi
return pbe->address;
}
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
void **h_buf;
+#endif
/**
* snapshot_write_next - used for writing the system memory snapshot.
@@ -2347,12 +2358,14 @@ int snapshot_write_next(struct snapshot_
if (error)
return error;
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
/* Allocate void * array to keep buffer point for generate hash,
* h_buf will freed in snapshot_image_verify().
*/
h_buf = kmalloc(sizeof(void *) * nr_copy_pages, GFP_KERNEL);
if (!h_buf)
pr_err("Allocate hash buffer fail!");
+#endif
error = memory_bm_create(©_bm, GFP_ATOMIC, PG_ANY);
if (error)
@@ -2380,8 +2393,10 @@ int snapshot_write_next(struct snapshot_
handle->sync_read = 0;
if (IS_ERR(handle->buffer))
return PTR_ERR(handle->buffer);
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
if (h_buf)
*h_buf = handle->buffer;
+#endif
}
} else {
copy_last_highmem_page();
@@ -2392,8 +2407,10 @@ int snapshot_write_next(struct snapshot_
return PTR_ERR(handle->buffer);
if (handle->buffer != buffer)
handle->sync_read = 0;
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
if (h_buf)
*(h_buf + (handle->cur - nr_meta_pages - 1)) = handle->buffer;
+#endif
}
handle->cur++;
return PAGE_SIZE;
@@ -2426,6 +2443,7 @@ int snapshot_image_loaded(struct snapsho
handle->cur <= nr_meta_pages + nr_copy_pages);
}
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
int snapshot_verify_signature(u8 *digest, size_t digest_size)
{
struct key *s4_wake_key;
@@ -2540,6 +2558,7 @@ error_digest:
crypto_free_shash(tfm);
return ret;
}
+#endif /* CONFIG_SNAPSHOT_VERIFICATION */
#ifdef CONFIG_HIGHMEM
/* Assumes that @buf is ready and points to a "safe" page */
Index: linux/kernel/power/swap.c
===================================================================
--- linux.orig/kernel/power/swap.c
+++ linux/kernel/power/swap.c
@@ -1004,11 +1004,15 @@ static int load_image(struct swap_map_ha
snapshot_write_finalize(snapshot);
if (!snapshot_image_loaded(snapshot))
ret = -ENODATA;
- ret = snapshot_image_verify();
- if (ret)
- pr_info("PM: snapshot signature check FAIL: %d\n", ret);
- else
- pr_info("PM: snapshot signature check SUCCESS!\n");
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
+ else {
+ ret = snapshot_image_verify();
+ if (ret)
+ pr_info("PM: snapshot signature check FAIL: %d\n", ret);
+ else
+ pr_info("PM: snapshot signature check SUCCESS!\n");
+ }
+#endif
}
swsusp_show_speed(&start, &stop, nr_to_read, "Read");
return ret;
@@ -1363,11 +1367,15 @@ out_finish:
}
}
}
- ret = snapshot_image_verify();
- if (ret)
- pr_info("PM: snapshot signature check FAIL: %d\n", ret);
- else
- pr_info("PM: snapshot signature check SUCCESS!\n");
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
+ if (!ret) {
+ ret = snapshot_image_verify();
+ if (ret)
+ pr_info("PM: snapshot signature check FAIL: %d\n", ret);
+ else
+ pr_info("PM: snapshot signature check SUCCESS!\n");
+ }
+#endif
}
swsusp_show_speed(&start, &stop, nr_to_read, "Read");
out_clean:
Index: linux/kernel/power/user.c
===================================================================
--- linux.orig/kernel/power/user.c
+++ linux/kernel/power/user.c
@@ -257,6 +257,7 @@ static long snapshot_ioctl(struct file *
error = -EPERM;
break;
}
+#ifdef CONFIG_SNAPSHOT_VERIFICATION
if (!snapshot_image_verify())
pr_info("PM: snapshot signature check SUCCESS!\n");
else {
@@ -264,6 +265,7 @@ static long snapshot_ioctl(struct file *
error = -EPERM;
break;
}
+#endif
error = hibernation_restore(data->platform_support);
break;
--
To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org
To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org
