diff options
Diffstat (limited to 'drivers/char/random.c')
| -rw-r--r-- | drivers/char/random.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 2849713d2231..8d85587b6d4f 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -257,6 +257,7 @@ #define INPUT_POOL_WORDS 128 #define OUTPUT_POOL_WORDS 32 #define SEC_XFER_SIZE 512 +#define EXTRACT_SIZE 10 /* * The minimum number of bits of entropy before we wake up a read on @@ -414,7 +415,7 @@ struct entropy_store { unsigned add_ptr; int entropy_count; int input_rotate; - __u8 *last_data; + __u8 last_data[EXTRACT_SIZE]; }; static __u32 input_pool_data[INPUT_POOL_WORDS]; @@ -714,8 +715,6 @@ void add_disk_randomness(struct gendisk *disk) } #endif -#define EXTRACT_SIZE 10 - /********************************************************************* * * Entropy extraction routines @@ -862,7 +861,7 @@ static ssize_t extract_entropy(struct entropy_store *r, void *buf, while (nbytes) { extract_buf(r, tmp); - if (r->last_data) { + if (fips_enabled) { spin_lock_irqsave(&r->lock, flags); if (!memcmp(tmp, r->last_data, EXTRACT_SIZE)) panic("Hardware RNG duplicated output!\n"); @@ -951,9 +950,6 @@ static void init_std_data(struct entropy_store *r) now = ktime_get_real(); mix_pool_bytes(r, &now, sizeof(now)); mix_pool_bytes(r, utsname(), sizeof(*(utsname()))); - /* Enable continuous test in fips mode */ - if (fips_enabled) - r->last_data = kmalloc(EXTRACT_SIZE, GFP_KERNEL); } static int rand_initialize(void) @@ -1191,7 +1187,7 @@ const struct file_operations urandom_fops = { void generate_random_uuid(unsigned char uuid_out[16]) { get_random_bytes(uuid_out, 16); - /* Set UUID version to 4 --- truely random generation */ + /* Set UUID version to 4 --- truly random generation */ uuid_out[6] = (uuid_out[6] & 0x0F) | 0x40; /* Set the UUID variant to DCE */ uuid_out[8] = (uuid_out[8] & 0x3F) | 0x80; |