random: cleanup integer types
commit d38bb0853589c939573ea50e9cb64f733e0e273d upstream. Rather than using the userspace type, __uXX, switch to using uXX. And rather than using variously chosen `char *` or `unsigned char *`, use `u8 *` uniformly for things that aren't strings, in the case where we are doing byte-by-byte traversal. Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jason A. Donenfeld
Greg Kroah-Hartman
parent
c9e108e36d
commit
7abbc9809f
@ -456,7 +456,7 @@ static DEFINE_SPINLOCK(random_ready_list_lock);
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static LIST_HEAD(random_ready_list);
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struct crng_state {
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__u32 state[16];
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u32 state[16];
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unsigned long init_time;
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spinlock_t lock;
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};
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@ -483,9 +483,9 @@ static bool crng_need_final_init = false;
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static int crng_init_cnt = 0;
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static unsigned long crng_global_init_time = 0;
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#define CRNG_INIT_CNT_THRESH (2*CHACHA_KEY_SIZE)
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static void _extract_crng(struct crng_state *crng, __u8 out[CHACHA_BLOCK_SIZE]);
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static void _extract_crng(struct crng_state *crng, u8 out[CHACHA_BLOCK_SIZE]);
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static void _crng_backtrack_protect(struct crng_state *crng,
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__u8 tmp[CHACHA_BLOCK_SIZE], int used);
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u8 tmp[CHACHA_BLOCK_SIZE], int used);
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static void process_random_ready_list(void);
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static void _get_random_bytes(void *buf, int nbytes);
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@ -509,16 +509,16 @@ MODULE_PARM_DESC(ratelimit_disable, "Disable random ratelimit suppression");
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struct entropy_store;
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struct entropy_store {
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/* read-only data: */
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__u32 *pool;
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u32 *pool;
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const char *name;
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/* read-write data: */
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spinlock_t lock;
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unsigned short add_ptr;
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unsigned short input_rotate;
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u16 add_ptr;
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u16 input_rotate;
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int entropy_count;
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unsigned int last_data_init:1;
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__u8 last_data[EXTRACT_SIZE];
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u8 last_data[EXTRACT_SIZE];
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};
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static ssize_t extract_entropy(struct entropy_store *r, void *buf,
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@ -527,7 +527,7 @@ static ssize_t _extract_entropy(struct entropy_store *r, void *buf,
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size_t nbytes, int fips);
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static void crng_reseed(struct crng_state *crng, struct entropy_store *r);
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static __u32 input_pool_data[INPUT_POOL_WORDS] __latent_entropy;
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static u32 input_pool_data[INPUT_POOL_WORDS] __latent_entropy;
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static struct entropy_store input_pool = {
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.name = "input",
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@ -535,7 +535,7 @@ static struct entropy_store input_pool = {
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.pool = input_pool_data
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};
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static __u32 const twist_table[8] = {
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static u32 const twist_table[8] = {
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0x00000000, 0x3b6e20c8, 0x76dc4190, 0x4db26158,
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0xedb88320, 0xd6d6a3e8, 0x9b64c2b0, 0xa00ae278 };
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@ -554,8 +554,8 @@ static void _mix_pool_bytes(struct entropy_store *r, const void *in,
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{
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unsigned long i;
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int input_rotate;
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const unsigned char *bytes = in;
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__u32 w;
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const u8 *bytes = in;
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u32 w;
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input_rotate = r->input_rotate;
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i = r->add_ptr;
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@ -608,10 +608,10 @@ static void mix_pool_bytes(struct entropy_store *r, const void *in,
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}
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struct fast_pool {
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__u32 pool[4];
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u32 pool[4];
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unsigned long last;
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unsigned short reg_idx;
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unsigned char count;
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u16 reg_idx;
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u8 count;
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};
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/*
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@ -621,8 +621,8 @@ struct fast_pool {
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*/
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static void fast_mix(struct fast_pool *f)
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{
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__u32 a = f->pool[0], b = f->pool[1];
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__u32 c = f->pool[2], d = f->pool[3];
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u32 a = f->pool[0], b = f->pool[1];
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u32 c = f->pool[2], d = f->pool[3];
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a += b; c += d;
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b = rol32(b, 6); d = rol32(d, 27);
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@ -814,14 +814,14 @@ static bool __init crng_init_try_arch_early(struct crng_state *crng)
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static void crng_initialize_secondary(struct crng_state *crng)
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{
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chacha_init_consts(crng->state);
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_get_random_bytes(&crng->state[4], sizeof(__u32) * 12);
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_get_random_bytes(&crng->state[4], sizeof(u32) * 12);
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crng_init_try_arch(crng);
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crng->init_time = jiffies - CRNG_RESEED_INTERVAL - 1;
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}
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static void __init crng_initialize_primary(struct crng_state *crng)
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{
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_extract_entropy(&input_pool, &crng->state[4], sizeof(__u32) * 12, 0);
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_extract_entropy(&input_pool, &crng->state[4], sizeof(u32) * 12, 0);
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if (crng_init_try_arch_early(crng) && trust_cpu && crng_init < 2) {
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invalidate_batched_entropy();
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numa_crng_init();
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@ -911,10 +911,10 @@ static struct crng_state *select_crng(void)
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* path. So we can't afford to dilly-dally. Returns the number of
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* bytes processed from cp.
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*/
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static size_t crng_fast_load(const char *cp, size_t len)
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static size_t crng_fast_load(const u8 *cp, size_t len)
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{
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unsigned long flags;
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char *p;
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u8 *p;
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size_t ret = 0;
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if (!spin_trylock_irqsave(&primary_crng.lock, flags))
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@ -923,7 +923,7 @@ static size_t crng_fast_load(const char *cp, size_t len)
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spin_unlock_irqrestore(&primary_crng.lock, flags);
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return 0;
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}
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p = (unsigned char *) &primary_crng.state[4];
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p = (u8 *) &primary_crng.state[4];
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while (len > 0 && crng_init_cnt < CRNG_INIT_CNT_THRESH) {
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p[crng_init_cnt % CHACHA_KEY_SIZE] ^= *cp;
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cp++; crng_init_cnt++; len--; ret++;
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@ -951,14 +951,14 @@ static size_t crng_fast_load(const char *cp, size_t len)
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* like a fixed DMI table (for example), which might very well be
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* unique to the machine, but is otherwise unvarying.
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*/
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static int crng_slow_load(const char *cp, size_t len)
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static int crng_slow_load(const u8 *cp, size_t len)
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{
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unsigned long flags;
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static unsigned char lfsr = 1;
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unsigned char tmp;
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unsigned i, max = CHACHA_KEY_SIZE;
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const char * src_buf = cp;
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char * dest_buf = (char *) &primary_crng.state[4];
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static u8 lfsr = 1;
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u8 tmp;
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unsigned int i, max = CHACHA_KEY_SIZE;
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const u8 * src_buf = cp;
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u8 * dest_buf = (u8 *) &primary_crng.state[4];
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if (!spin_trylock_irqsave(&primary_crng.lock, flags))
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return 0;
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@ -987,8 +987,8 @@ static void crng_reseed(struct crng_state *crng, struct entropy_store *r)
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unsigned long flags;
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int i, num;
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union {
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__u8 block[CHACHA_BLOCK_SIZE];
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__u32 key[8];
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u8 block[CHACHA_BLOCK_SIZE];
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u32 key[8];
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} buf;
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if (r) {
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@ -1015,7 +1015,7 @@ static void crng_reseed(struct crng_state *crng, struct entropy_store *r)
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}
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static void _extract_crng(struct crng_state *crng,
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__u8 out[CHACHA_BLOCK_SIZE])
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u8 out[CHACHA_BLOCK_SIZE])
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{
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unsigned long flags, init_time;
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@ -1033,7 +1033,7 @@ static void _extract_crng(struct crng_state *crng,
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spin_unlock_irqrestore(&crng->lock, flags);
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}
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static void extract_crng(__u8 out[CHACHA_BLOCK_SIZE])
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static void extract_crng(u8 out[CHACHA_BLOCK_SIZE])
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{
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_extract_crng(select_crng(), out);
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}
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@ -1043,26 +1043,26 @@ static void extract_crng(__u8 out[CHACHA_BLOCK_SIZE])
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* enough) to mutate the CRNG key to provide backtracking protection.
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*/
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static void _crng_backtrack_protect(struct crng_state *crng,
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__u8 tmp[CHACHA_BLOCK_SIZE], int used)
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u8 tmp[CHACHA_BLOCK_SIZE], int used)
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{
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unsigned long flags;
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__u32 *s, *d;
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u32 *s, *d;
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int i;
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used = round_up(used, sizeof(__u32));
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used = round_up(used, sizeof(u32));
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if (used + CHACHA_KEY_SIZE > CHACHA_BLOCK_SIZE) {
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extract_crng(tmp);
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used = 0;
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}
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spin_lock_irqsave(&crng->lock, flags);
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s = (__u32 *) &tmp[used];
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s = (u32 *) &tmp[used];
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d = &crng->state[4];
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for (i=0; i < 8; i++)
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*d++ ^= *s++;
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spin_unlock_irqrestore(&crng->lock, flags);
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}
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static void crng_backtrack_protect(__u8 tmp[CHACHA_BLOCK_SIZE], int used)
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static void crng_backtrack_protect(u8 tmp[CHACHA_BLOCK_SIZE], int used)
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{
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_crng_backtrack_protect(select_crng(), tmp, used);
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}
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@ -1070,7 +1070,7 @@ static void crng_backtrack_protect(__u8 tmp[CHACHA_BLOCK_SIZE], int used)
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static ssize_t extract_crng_user(void __user *buf, size_t nbytes)
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{
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ssize_t ret = 0, i = CHACHA_BLOCK_SIZE;
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__u8 tmp[CHACHA_BLOCK_SIZE] __aligned(4);
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u8 tmp[CHACHA_BLOCK_SIZE] __aligned(4);
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int large_request = (nbytes > 256);
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while (nbytes) {
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@ -1158,8 +1158,8 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
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struct entropy_store *r;
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struct {
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long jiffies;
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unsigned cycles;
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unsigned num;
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unsigned int cycles;
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unsigned int num;
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} sample;
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long delta, delta2, delta3;
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@ -1241,15 +1241,15 @@ static void add_interrupt_bench(cycles_t start)
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#define add_interrupt_bench(x)
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#endif
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static __u32 get_reg(struct fast_pool *f, struct pt_regs *regs)
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static u32 get_reg(struct fast_pool *f, struct pt_regs *regs)
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{
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__u32 *ptr = (__u32 *) regs;
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u32 *ptr = (u32 *) regs;
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unsigned int idx;
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if (regs == NULL)
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return 0;
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idx = READ_ONCE(f->reg_idx);
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if (idx >= sizeof(struct pt_regs) / sizeof(__u32))
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if (idx >= sizeof(struct pt_regs) / sizeof(u32))
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idx = 0;
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ptr += idx++;
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WRITE_ONCE(f->reg_idx, idx);
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@ -1263,8 +1263,8 @@ void add_interrupt_randomness(int irq)
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struct pt_regs *regs = get_irq_regs();
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unsigned long now = jiffies;
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cycles_t cycles = random_get_entropy();
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__u32 c_high, j_high;
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__u64 ip;
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u32 c_high, j_high;
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u64 ip;
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if (cycles == 0)
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cycles = get_reg(fast_pool, regs);
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@ -1282,8 +1282,7 @@ void add_interrupt_randomness(int irq)
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if (unlikely(crng_init == 0)) {
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if ((fast_pool->count >= 64) &&
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crng_fast_load((char *) fast_pool->pool,
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sizeof(fast_pool->pool)) > 0) {
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crng_fast_load((u8 *)fast_pool->pool, sizeof(fast_pool->pool)) > 0) {
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fast_pool->count = 0;
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fast_pool->last = now;
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}
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@ -1380,7 +1379,7 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min,
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*
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* Note: we assume that .poolwords is a multiple of 16 words.
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*/
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static void extract_buf(struct entropy_store *r, __u8 *out)
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static void extract_buf(struct entropy_store *r, u8 *out)
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{
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struct blake2s_state state __aligned(__alignof__(unsigned long));
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u8 hash[BLAKE2S_HASH_SIZE];
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@ -1430,7 +1429,7 @@ static ssize_t _extract_entropy(struct entropy_store *r, void *buf,
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size_t nbytes, int fips)
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{
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ssize_t ret = 0, i;
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__u8 tmp[EXTRACT_SIZE];
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u8 tmp[EXTRACT_SIZE];
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unsigned long flags;
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while (nbytes) {
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@ -1468,7 +1467,7 @@ static ssize_t _extract_entropy(struct entropy_store *r, void *buf,
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static ssize_t extract_entropy(struct entropy_store *r, void *buf,
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size_t nbytes, int min, int reserved)
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{
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__u8 tmp[EXTRACT_SIZE];
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u8 tmp[EXTRACT_SIZE];
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unsigned long flags;
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/* if last_data isn't primed, we need EXTRACT_SIZE extra bytes */
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@ -1530,7 +1529,7 @@ static void _warn_unseeded_randomness(const char *func_name, void *caller,
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*/
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static void _get_random_bytes(void *buf, int nbytes)
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{
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__u8 tmp[CHACHA_BLOCK_SIZE] __aligned(4);
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u8 tmp[CHACHA_BLOCK_SIZE] __aligned(4);
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trace_get_random_bytes(nbytes, _RET_IP_);
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@ -1724,7 +1723,7 @@ EXPORT_SYMBOL(del_random_ready_callback);
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int __must_check get_random_bytes_arch(void *buf, int nbytes)
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{
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int left = nbytes;
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char *p = buf;
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u8 *p = buf;
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trace_get_random_bytes_arch(left, _RET_IP_);
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while (left) {
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@ -1866,7 +1865,7 @@ static int
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write_pool(struct entropy_store *r, const char __user *buffer, size_t count)
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{
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size_t bytes;
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__u32 t, buf[16];
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u32 t, buf[16];
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const char __user *p = buffer;
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while (count > 0) {
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@ -1876,7 +1875,7 @@ write_pool(struct entropy_store *r, const char __user *buffer, size_t count)
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if (copy_from_user(&buf, p, bytes))
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return -EFAULT;
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for (b = bytes ; b > 0 ; b -= sizeof(__u32), i++) {
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for (b = bytes; b > 0; b -= sizeof(u32), i++) {
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if (!arch_get_random_int(&t))
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break;
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buf[i] ^= t;
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