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treewide: use get_random_u32_below() instead of deprecated function

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This is a simple mechanical transformation done by:

@@
expression E;
@@
- prandom_u32_max
+ get_random_u32_below
  (E)

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs
Reviewed-by: SeongJae Park <sj@kernel.org> # for damon
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> # for infiniband
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> # for arm
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2022-10-09 20:44:02 -06:00
parent 7f576b2593
commit 8032bf1233
132 changed files with 280 additions and 280 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/kernel/process.c
View File

@ -371,7 +371,7 @@ static unsigned long sigpage_addr(const struct mm_struct *mm,
slots = ((last - first) >> PAGE_SHIFT) + 1;
offset = prandom_u32_max(slots);
offset = get_random_u32_below(slots);
addr = first + (offset << PAGE_SHIFT);

2
arch/arm64/kernel/process.c
View File

@ -591,7 +591,7 @@ unsigned long __get_wchan(struct task_struct *p)
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= prandom_u32_max(PAGE_SIZE);
sp -= get_random_u32_below(PAGE_SIZE);
return sp & ~0xf;
}

2
arch/loongarch/kernel/process.c
View File

@ -293,7 +293,7 @@ unsigned long stack_top(void)
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= prandom_u32_max(PAGE_SIZE);
sp -= get_random_u32_below(PAGE_SIZE);
return sp & STACK_ALIGN;
}

2
arch/loongarch/kernel/vdso.c
View File

@ -78,7 +78,7 @@ static unsigned long vdso_base(void)
unsigned long base = STACK_TOP;
if (current->flags & PF_RANDOMIZE) {
base += prandom_u32_max(VDSO_RANDOMIZE_SIZE);
base += get_random_u32_below(VDSO_RANDOMIZE_SIZE);
base = PAGE_ALIGN(base);
}

2
arch/mips/kernel/process.c
View File

@ -711,7 +711,7 @@ unsigned long mips_stack_top(void)
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= prandom_u32_max(PAGE_SIZE);
sp -= get_random_u32_below(PAGE_SIZE);
return sp & ALMASK;
}

2
arch/mips/kernel/vdso.c
View File

@ -79,7 +79,7 @@ static unsigned long vdso_base(void)
}
if (current->flags & PF_RANDOMIZE) {
base += prandom_u32_max(VDSO_RANDOMIZE_SIZE);
base += get_random_u32_below(VDSO_RANDOMIZE_SIZE);
base = PAGE_ALIGN(base);
}

2
arch/parisc/kernel/vdso.c
View File

@ -75,7 +75,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
map_base = mm->mmap_base;
if (current->flags & PF_RANDOMIZE)
map_base -= prandom_u32_max(0x20) * PAGE_SIZE;
map_base -= get_random_u32_below(0x20) * PAGE_SIZE;
vdso_text_start = get_unmapped_area(NULL, map_base, vdso_text_len, 0, 0);

4
arch/powerpc/crypto/crc-vpmsum_test.c
View File

@ -77,8 +77,8 @@ static int __init crc_test_init(void)
pr_info("crc-vpmsum_test begins, %lu iterations\n", iterations);
for (i=0; i<iterations; i++) {
size_t offset = prandom_u32_max(16);
size_t len = prandom_u32_max(MAX_CRC_LENGTH);
size_t offset = get_random_u32_below(16);
size_t len = get_random_u32_below(MAX_CRC_LENGTH);
if (len <= offset)
continue;

2
arch/powerpc/kernel/process.c
View File

@ -2303,6 +2303,6 @@ void notrace __ppc64_runlatch_off(void)
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= prandom_u32_max(PAGE_SIZE);
sp -= get_random_u32_below(PAGE_SIZE);
return sp & ~0xf;
}

2
arch/s390/kernel/process.c
View File

@ -224,7 +224,7 @@ unsigned long __get_wchan(struct task_struct *p)
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= prandom_u32_max(PAGE_SIZE);
sp -= get_random_u32_below(PAGE_SIZE);
return sp & ~0xf;
}

2
arch/s390/kernel/vdso.c
View File

@ -227,7 +227,7 @@ static unsigned long vdso_addr(unsigned long start, unsigned long len)
end -= len;
if (end > start) {
offset = prandom_u32_max(((end - start) >> PAGE_SHIFT) + 1);
offset = get_random_u32_below(((end - start) >> PAGE_SHIFT) + 1);
addr = start + (offset << PAGE_SHIFT);
} else {
addr = start;

2
arch/sparc/vdso/vma.c
View File

@ -354,7 +354,7 @@ static unsigned long vdso_addr(unsigned long start, unsigned int len)
unsigned int offset;
/* This loses some more bits than a modulo, but is cheaper */
offset = prandom_u32_max(PTRS_PER_PTE);
offset = get_random_u32_below(PTRS_PER_PTE);
return start + (offset << PAGE_SHIFT);
}

2
arch/um/kernel/process.c
View File

@ -356,7 +356,7 @@ int singlestepping(void * t)
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= prandom_u32_max(8192);
sp -= get_random_u32_below(8192);
return sp & ~0xf;
}
#endif

2
arch/x86/entry/vdso/vma.c
View File

@ -327,7 +327,7 @@ static unsigned long vdso_addr(unsigned long start, unsigned len)
end -= len;
if (end > start) {
offset = prandom_u32_max(((end - start) >> PAGE_SHIFT) + 1);
offset = get_random_u32_below(((end - start) >> PAGE_SHIFT) + 1);
addr = start + (offset << PAGE_SHIFT);
} else {
addr = start;

2
arch/x86/kernel/module.c
View File

@ -53,7 +53,7 @@ static unsigned long int get_module_load_offset(void)
*/
if (module_load_offset == 0)
module_load_offset =
(prandom_u32_max(1024) + 1) * PAGE_SIZE;
(get_random_u32_below(1024) + 1) * PAGE_SIZE;
mutex_unlock(&module_kaslr_mutex);
}
return module_load_offset;

2
arch/x86/kernel/process.c
View File

@ -965,7 +965,7 @@ early_param("idle", idle_setup);
unsigned long arch_align_stack(unsigned long sp)
{
if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
sp -= prandom_u32_max(8192);
sp -= get_random_u32_below(8192);
return sp & ~0xf;
}

4
arch/x86/mm/pat/cpa-test.c
View File

@ -136,10 +136,10 @@ static int pageattr_test(void)
failed += print_split(&sa);
for (i = 0; i < NTEST; i++) {
unsigned long pfn = prandom_u32_max(max_pfn_mapped);
unsigned long pfn = get_random_u32_below(max_pfn_mapped);
addr[i] = (unsigned long)__va(pfn << PAGE_SHIFT);
len[i] = prandom_u32_max(NPAGES);
len[i] = get_random_u32_below(NPAGES);
len[i] = min_t(unsigned long, len[i], max_pfn_mapped - pfn - 1);
if (len[i] == 0)

2
crypto/rsa-pkcs1pad.c
View File

@ -253,7 +253,7 @@ static int pkcs1pad_encrypt(struct akcipher_request *req)
ps_end = ctx->key_size - req->src_len - 2;
req_ctx->in_buf[0] = 0x02;
for (i = 1; i < ps_end; i++)
req_ctx->in_buf[i] = 1 + prandom_u32_max(255);
req_ctx->in_buf[i] = 1 + get_random_u32_below(255);
req_ctx->in_buf[ps_end] = 0x00;
pkcs1pad_sg_set_buf(req_ctx->in_sg, req_ctx->in_buf,

86
crypto/testmgr.c
View File

@ -855,9 +855,9 @@ static int prepare_keybuf(const u8 *key, unsigned int ksize,
/* Generate a random length in range [0, max_len], but prefer smaller values */
static unsigned int generate_random_length(unsigned int max_len)
{
unsigned int len = prandom_u32_max(max_len + 1);
unsigned int len = get_random_u32_below(max_len + 1);
switch (prandom_u32_max(4)) {
switch (get_random_u32_below(4)) {
case 0:
return len % 64;
case 1:
@ -874,14 +874,14 @@ static void flip_random_bit(u8 *buf, size_t size)
{
size_t bitpos;
bitpos = prandom_u32_max(size * 8);
bitpos = get_random_u32_below(size * 8);
buf[bitpos / 8] ^= 1 << (bitpos % 8);
}
/* Flip a random byte in the given nonempty data buffer */
static void flip_random_byte(u8 *buf, size_t size)
{
buf[prandom_u32_max(size)] ^= 0xff;
buf[get_random_u32_below(size)] ^= 0xff;
}
/* Sometimes make some random changes to the given nonempty data buffer */
@ -891,15 +891,15 @@ static void mutate_buffer(u8 *buf, size_t size)
size_t i;
/* Sometimes flip some bits */
if (prandom_u32_max(4) == 0) {
num_flips = min_t(size_t, 1 << prandom_u32_max(8), size * 8);
if (get_random_u32_below(4) == 0) {
num_flips = min_t(size_t, 1 << get_random_u32_below(8), size * 8);
for (i = 0; i < num_flips; i++)
flip_random_bit(buf, size);
}
/* Sometimes flip some bytes */
if (prandom_u32_max(4) == 0) {
num_flips = min_t(size_t, 1 << prandom_u32_max(8), size);
if (get_random_u32_below(4) == 0) {
num_flips = min_t(size_t, 1 << get_random_u32_below(8), size);
for (i = 0; i < num_flips; i++)
flip_random_byte(buf, size);
}
@ -915,11 +915,11 @@ static void generate_random_bytes(u8 *buf, size_t count)
if (count == 0)
return;
switch (prandom_u32_max(8)) { /* Choose a generation strategy */
switch (get_random_u32_below(8)) { /* Choose a generation strategy */
case 0:
case 1:
/* All the same byte, plus optional mutations */
switch (prandom_u32_max(4)) {
switch (get_random_u32_below(4)) {
case 0:
b = 0x00;
break;
@ -959,24 +959,24 @@ static char *generate_random_sgl_divisions(struct test_sg_division *divs,
unsigned int this_len;
const char *flushtype_str;
if (div == &divs[max_divs - 1] || prandom_u32_max(2) == 0)
if (div == &divs[max_divs - 1] || get_random_u32_below(2) == 0)
this_len = remaining;
else
this_len = 1 + prandom_u32_max(remaining);
this_len = 1 + get_random_u32_below(remaining);
div->proportion_of_total = this_len;
if (prandom_u32_max(4) == 0)
div->offset = (PAGE_SIZE - 128) + prandom_u32_max(128);
else if (prandom_u32_max(2) == 0)
div->offset = prandom_u32_max(32);
if (get_random_u32_below(4) == 0)
div->offset = (PAGE_SIZE - 128) + get_random_u32_below(128);
else if (get_random_u32_below(2) == 0)
div->offset = get_random_u32_below(32);
else
div->offset = prandom_u32_max(PAGE_SIZE);
if (prandom_u32_max(8) == 0)
div->offset = get_random_u32_below(PAGE_SIZE);
if (get_random_u32_below(8) == 0)
div->offset_relative_to_alignmask = true;
div->flush_type = FLUSH_TYPE_NONE;
if (gen_flushes) {
switch (prandom_u32_max(4)) {
switch (get_random_u32_below(4)) {
case 0:
div->flush_type = FLUSH_TYPE_REIMPORT;
break;
@ -988,7 +988,7 @@ static char *generate_random_sgl_divisions(struct test_sg_division *divs,
if (div->flush_type != FLUSH_TYPE_NONE &&
!(req_flags & CRYPTO_TFM_REQ_MAY_SLEEP) &&
prandom_u32_max(2) == 0)
get_random_u32_below(2) == 0)
div->nosimd = true;
switch (div->flush_type) {
@ -1035,7 +1035,7 @@ static void generate_random_testvec_config(struct testvec_config *cfg,
p += scnprintf(p, end - p, "random:");
switch (prandom_u32_max(4)) {
switch (get_random_u32_below(4)) {
case 0:
case 1:
cfg->inplace_mode = OUT_OF_PLACE;
@ -1050,12 +1050,12 @@ static void generate_random_testvec_config(struct testvec_config *cfg,
break;
}
if (prandom_u32_max(2) == 0) {
if (get_random_u32_below(2) == 0) {
cfg->req_flags |= CRYPTO_TFM_REQ_MAY_SLEEP;
p += scnprintf(p, end - p, " may_sleep");
}
switch (prandom_u32_max(4)) {
switch (get_random_u32_below(4)) {
case 0:
cfg->finalization_type = FINALIZATION_TYPE_FINAL;
p += scnprintf(p, end - p, " use_final");
@ -1071,7 +1071,7 @@ static void generate_random_testvec_config(struct testvec_config *cfg,
}
if (!(cfg->req_flags & CRYPTO_TFM_REQ_MAY_SLEEP) &&
prandom_u32_max(2) == 0) {
get_random_u32_below(2) == 0) {
cfg->nosimd = true;
p += scnprintf(p, end - p, " nosimd");
}
@ -1084,7 +1084,7 @@ static void generate_random_testvec_config(struct testvec_config *cfg,
cfg->req_flags);
p += scnprintf(p, end - p, "]");
if (cfg->inplace_mode == OUT_OF_PLACE && prandom_u32_max(2) == 0) {
if (cfg->inplace_mode == OUT_OF_PLACE && get_random_u32_below(2) == 0) {
p += scnprintf(p, end - p, " dst_divs=[");
p = generate_random_sgl_divisions(cfg->dst_divs,
ARRAY_SIZE(cfg->dst_divs),
@ -1093,13 +1093,13 @@ static void generate_random_testvec_config(struct testvec_config *cfg,
p += scnprintf(p, end - p, "]");
}
if (prandom_u32_max(2) == 0) {
cfg->iv_offset = 1 + prandom_u32_max(MAX_ALGAPI_ALIGNMASK);
if (get_random_u32_below(2) == 0) {
cfg->iv_offset = 1 + get_random_u32_below(MAX_ALGAPI_ALIGNMASK);
p += scnprintf(p, end - p, " iv_offset=%u", cfg->iv_offset);
}
if (prandom_u32_max(2) == 0) {
cfg->key_offset = 1 + prandom_u32_max(MAX_ALGAPI_ALIGNMASK);
if (get_random_u32_below(2) == 0) {
cfg->key_offset = 1 + get_random_u32_below(MAX_ALGAPI_ALIGNMASK);
p += scnprintf(p, end - p, " key_offset=%u", cfg->key_offset);
}
@ -1652,8 +1652,8 @@ static void generate_random_hash_testvec(struct shash_desc *desc,
vec->ksize = 0;
if (maxkeysize) {
vec->ksize = maxkeysize;
if (prandom_u32_max(4) == 0)
vec->ksize = 1 + prandom_u32_max(maxkeysize);
if (get_random_u32_below(4) == 0)
vec->ksize = 1 + get_random_u32_below(maxkeysize);
generate_random_bytes((u8 *)vec->key, vec->ksize);
vec->setkey_error = crypto_shash_setkey(desc->tfm, vec->key,
@ -2218,13 +2218,13 @@ static void mutate_aead_message(struct aead_testvec *vec, bool aad_iv,
const unsigned int aad_tail_size = aad_iv ? ivsize : 0;
const unsigned int authsize = vec->clen - vec->plen;
if (prandom_u32_max(2) == 0 && vec->alen > aad_tail_size) {
if (get_random_u32_below(2) == 0 && vec->alen > aad_tail_size) {
/* Mutate the AAD */
flip_random_bit((u8 *)vec->assoc, vec->alen - aad_tail_size);
if (prandom_u32_max(2) == 0)
if (get_random_u32_below(2) == 0)
return;
}
if (prandom_u32_max(2) == 0) {
if (get_random_u32_below(2) == 0) {
/* Mutate auth tag (assuming it's at the end of ciphertext) */
flip_random_bit((u8 *)vec->ctext + vec->plen, authsize);
} else {
@ -2249,7 +2249,7 @@ static void generate_aead_message(struct aead_request *req,
const unsigned int ivsize = crypto_aead_ivsize(tfm);
const unsigned int authsize = vec->clen - vec->plen;
const bool inauthentic = (authsize >= MIN_COLLISION_FREE_AUTHSIZE) &&
(prefer_inauthentic || prandom_u32_max(4) == 0);
(prefer_inauthentic || get_random_u32_below(4) == 0);
/* Generate the AAD. */
generate_random_bytes((u8 *)vec->assoc, vec->alen);
@ -2257,7 +2257,7 @@ static void generate_aead_message(struct aead_request *req,
/* Avoid implementation-defined behavior. */
memcpy((u8 *)vec->assoc + vec->alen - ivsize, vec->iv, ivsize);
if (inauthentic && prandom_u32_max(2) == 0) {
if (inauthentic && get_random_u32_below(2) == 0) {
/* Generate a random ciphertext. */
generate_random_bytes((u8 *)vec->ctext, vec->clen);
} else {
@ -2321,8 +2321,8 @@ static void generate_random_aead_testvec(struct aead_request *req,
/* Key: length in [0, maxkeysize], but usually choose maxkeysize */
vec->klen = maxkeysize;
if (prandom_u32_max(4) == 0)
vec->klen = prandom_u32_max(maxkeysize + 1);
if (get_random_u32_below(4) == 0)
vec->klen = get_random_u32_below(maxkeysize + 1);
generate_random_bytes((u8 *)vec->key, vec->klen);
vec->setkey_error = crypto_aead_setkey(tfm, vec->key, vec->klen);
@ -2331,8 +2331,8 @@ static void generate_random_aead_testvec(struct aead_request *req,
/* Tag length: in [0, maxauthsize], but usually choose maxauthsize */
authsize = maxauthsize;
if (prandom_u32_max(4) == 0)
authsize = prandom_u32_max(maxauthsize + 1);
if (get_random_u32_below(4) == 0)
authsize = get_random_u32_below(maxauthsize + 1);
if (prefer_inauthentic && authsize < MIN_COLLISION_FREE_AUTHSIZE)
authsize = MIN_COLLISION_FREE_AUTHSIZE;
if (WARN_ON(authsize > maxdatasize))
@ -2342,7 +2342,7 @@ static void generate_random_aead_testvec(struct aead_request *req,
/* AAD, plaintext, and ciphertext lengths */
total_len = generate_random_length(maxdatasize);
if (prandom_u32_max(4) == 0)
if (get_random_u32_below(4) == 0)
vec->alen = 0;
else
vec->alen = generate_random_length(total_len);
@ -2958,8 +2958,8 @@ static void generate_random_cipher_testvec(struct skcipher_request *req,
/* Key: length in [0, maxkeysize], but usually choose maxkeysize */
vec->klen = maxkeysize;
if (prandom_u32_max(4) == 0)
vec->klen = prandom_u32_max(maxkeysize + 1);
if (get_random_u32_below(4) == 0)
vec->klen = get_random_u32_below(maxkeysize + 1);
generate_random_bytes((u8 *)vec->key, vec->klen);
vec->setkey_error = crypto_skcipher_setkey(tfm, vec->key, vec->klen);

4
drivers/block/drbd/drbd_receiver.c
View File

@ -781,7 +781,7 @@ static struct socket *drbd_wait_for_connect(struct drbd_connection *connection,
timeo = connect_int * HZ;
/* 28.5% random jitter */
timeo += prandom_u32_max(2) ? timeo / 7 : -timeo / 7;
timeo += get_random_u32_below(2) ? timeo / 7 : -timeo / 7;
err = wait_for_completion_interruptible_timeout(&ad->door_bell, timeo);
if (err <= 0)
@ -1004,7 +1004,7 @@ retry:
drbd_warn(connection, "Error receiving initial packet\n");
sock_release(s);
randomize:
if (prandom_u32_max(2))
if (get_random_u32_below(2))
goto retry;
}
}

2
drivers/bus/mhi/host/internal.h
View File

@ -129,7 +129,7 @@ enum mhi_pm_state {
#define PRIMARY_CMD_RING 0
#define MHI_DEV_WAKE_DB 127
#define MHI_MAX_MTU 0xffff
#define MHI_RANDOM_U32_NONZERO(bmsk) (prandom_u32_max(bmsk) + 1)
#define MHI_RANDOM_U32_NONZERO(bmsk) (get_random_u32_below(bmsk) + 1)
enum mhi_er_type {
MHI_ER_TYPE_INVALID = 0x0,

6
drivers/dma-buf/st-dma-fence-chain.c
View File

@ -400,7 +400,7 @@ static int __find_race(void *arg)
struct dma_fence *fence = dma_fence_get(data->fc.tail);
int seqno;
seqno = prandom_u32_max(data->fc.chain_length) + 1;
seqno = get_random_u32_below(data->fc.chain_length) + 1;
err = dma_fence_chain_find_seqno(&fence, seqno);
if (err) {
@ -429,7 +429,7 @@ static int __find_race(void *arg)
dma_fence_put(fence);
signal:
seqno = prandom_u32_max(data->fc.chain_length - 1);
seqno = get_random_u32_below(data->fc.chain_length - 1);
dma_fence_signal(data->fc.fences[seqno]);
cond_resched();
}
@ -637,7 +637,7 @@ static void randomise_fences(struct fence_chains *fc)
while (--count) {
unsigned int swp;
swp = prandom_u32_max(count + 1);
swp = get_random_u32_below(count + 1);
if (swp == count)
continue;

2
drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
View File

@ -2424,7 +2424,7 @@ gen8_dispatch_bsd_engine(struct drm_i915_private *dev_priv,
/* Check whether the file_priv has already selected one ring. */
if ((int)file_priv->bsd_engine < 0)
file_priv->bsd_engine =
prandom_u32_max(num_vcs_engines(dev_priv));
get_random_u32_below(num_vcs_engines(dev_priv));
return file_priv->bsd_engine;
}

2
drivers/gpu/drm/i915/gt/intel_execlists_submission.c
View File

@ -3689,7 +3689,7 @@ static void virtual_engine_initial_hint(struct virtual_engine *ve)
* NB This does not force us to execute on this engine, it will just
* typically be the first we inspect for submission.
*/
swp = prandom_u32_max(ve->num_siblings);
swp = get_random_u32_below(ve->num_siblings);
if (swp)
swap(ve->siblings[swp], ve->siblings[0]);
}

4
drivers/gpu/drm/i915/intel_memory_region.c
View File

@ -38,7 +38,7 @@ static int __iopagetest(struct intel_memory_region *mem,
u8 value, resource_size_t offset,
const void *caller)
{
int byte = prandom_u32_max(pagesize);
int byte = get_random_u32_below(pagesize);
u8 result[3];
memset_io(va, value, pagesize); /* or GPF! */
@ -92,7 +92,7 @@ static int iopagetest(struct intel_memory_region *mem,
static resource_size_t random_page(resource_size_t last)
{
/* Limited to low 44b (16TiB), but should suffice for a spot check */
return prandom_u32_max(last >> PAGE_SHIFT) << PAGE_SHIFT;
return get_random_u32_below(last >> PAGE_SHIFT) << PAGE_SHIFT;
}
static int iomemtest(struct intel_memory_region *mem,

2
drivers/infiniband/core/cma.c
View File

@ -3807,7 +3807,7 @@ static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
inet_get_local_port_range(net, &low, &high);
remaining = (high - low) + 1;
rover = prandom_u32_max(remaining) + low;
rover = get_random_u32_below(remaining) + low;
retry:
if (last_used_port != rover) {
struct rdma_bind_list *bind_list;

4
drivers/infiniband/hw/cxgb4/id_table.c
View File

@ -54,7 +54,7 @@ u32 c4iw_id_alloc(struct c4iw_id_table *alloc)
if (obj < alloc->max) {
if (alloc->flags & C4IW_ID_TABLE_F_RANDOM)
alloc->last += prandom_u32_max(RANDOM_SKIP);
alloc->last += get_random_u32_below(RANDOM_SKIP);
else
alloc->last = obj + 1;
if (alloc->last >= alloc->max)
@ -85,7 +85,7 @@ int c4iw_id_table_alloc(struct c4iw_id_table *alloc, u32 start, u32 num,
alloc->start = start;
alloc->flags = flags;
if (flags & C4IW_ID_TABLE_F_RANDOM)
alloc->last = prandom_u32_max(RANDOM_SKIP);
alloc->last = get_random_u32_below(RANDOM_SKIP);
else
alloc->last = 0;
alloc->max = num;

4
drivers/infiniband/hw/hns/hns_roce_ah.c
View File

@ -41,8 +41,8 @@ static inline u16 get_ah_udp_sport(const struct rdma_ah_attr *ah_attr)
u16 sport;
if (!fl)
sport = prandom_u32_max(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX + 1 -
IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
sport = get_random_u32_below(IB_ROCE_UDP_ENCAP_VALID_PORT_MAX +
1 - IB_ROCE_UDP_ENCAP_VALID_PORT_MIN) +
IB_ROCE_UDP_ENCAP_VALID_PORT_MIN;
else
sport = rdma_flow_label_to_udp_sport(fl);

2
drivers/infiniband/ulp/rtrs/rtrs-clt.c
View File

@ -1517,7 +1517,7 @@ static void rtrs_clt_err_recovery_work(struct work_struct *work)
rtrs_clt_stop_and_destroy_conns(clt_path);
queue_delayed_work(rtrs_wq, &clt_path->reconnect_dwork,
msecs_to_jiffies(delay_ms +
prandom_u32_max(RTRS_RECONNECT_SEED)));
get_random_u32_below(RTRS_RECONNECT_SEED)));
}
static struct rtrs_clt_path *alloc_path(struct rtrs_clt_sess *clt,

2
drivers/md/bcache/request.c
View File

@ -401,7 +401,7 @@ static bool check_should_bypass(struct cached_dev *dc, struct bio *bio)
}
if (bypass_torture_test(dc)) {
if (prandom_u32_max(4) == 3)
if (get_random_u32_below(4) == 3)
goto skip;
else
goto rescale;

8
drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
View File

@ -872,7 +872,7 @@ static void precalculate_color(struct tpg_data *tpg, int k)
} else if (tpg->pattern == TPG_PAT_NOISE) {
r = g = b = get_random_u8();
} else if (k == TPG_COLOR_RANDOM) {
r = g = b = tpg->qual_offset + prandom_u32_max(196);
r = g = b = tpg->qual_offset + get_random_u32_below(196);
} else if (k >= TPG_COLOR_RAMP) {
r = g = b = k - TPG_COLOR_RAMP;
}
@ -2286,7 +2286,7 @@ static void tpg_fill_params_extras(const struct tpg_data *tpg,
params->wss_width = tpg->crop.width;
params->wss_width = tpg_hscale_div(tpg, p, params->wss_width);
params->wss_random_offset =
params->twopixsize * prandom_u32_max(tpg->src_width / 2);
params->twopixsize * get_random_u32_below(tpg->src_width / 2);
if (tpg->crop.left < tpg->border.left) {
left_pillar_width = tpg->border.left - tpg->crop.left;
@ -2495,9 +2495,9 @@ static void tpg_fill_plane_pattern(const struct tpg_data *tpg,
linestart_newer = tpg->black_line[p];
} else if (tpg->pattern == TPG_PAT_NOISE || tpg->qual == TPG_QUAL_NOISE) {
linestart_older = tpg->random_line[p] +
twopixsize * prandom_u32_max(tpg->src_width / 2);
twopixsize * get_random_u32_below(tpg->src_width / 2);
linestart_newer = tpg->random_line[p] +
twopixsize * prandom_u32_max(tpg->src_width / 2);
twopixsize * get_random_u32_below(tpg->src_width / 2);
} else {
unsigned frame_line_old =
(frame_line + mv_vert_old) % tpg->src_height;

8
drivers/media/test-drivers/vidtv/vidtv_demod.c
View File

@ -188,11 +188,11 @@ static void vidtv_demod_update_stats(struct dvb_frontend *fe)
* Also, usually, signal strength is a negative number in dBm.
*/
c->strength.stat[0].svalue = state->tuner_cnr;
c->strength.stat[0].svalue -= prandom_u32_max(state->tuner_cnr / 50);
c->strength.stat[0].svalue -= get_random_u32_below(state->tuner_cnr / 50);
c->strength.stat[0].svalue -= 68000; /* Adjust to a better range */
c->cnr.stat[0].svalue = state->tuner_cnr;
c->cnr.stat[0].svalue -= prandom_u32_max(state->tuner_cnr / 50);
c->cnr.stat[0].svalue -= get_random_u32_below(state->tuner_cnr / 50);
}
static int vidtv_demod_read_status(struct dvb_frontend *fe,
@ -213,11 +213,11 @@ static int vidtv_demod_read_status(struct dvb_frontend *fe,
if (snr < cnr2qual->cnr_ok) {
/* eventually lose the TS lock */
if (prandom_u32_max(100) < config->drop_tslock_prob_on_low_snr)
if (get_random_u32_below(100) < config->drop_tslock_prob_on_low_snr)
state->status = 0;
} else {
/* recover if the signal improves */
if (prandom_u32_max(100) <
if (get_random_u32_below(100) <
config->recover_tslock_prob_on_good_snr)
state->status = FE_HAS_SIGNAL |
FE_HAS_CARRIER |

2
drivers/media/test-drivers/vivid/vivid-kthread-cap.c
View File

@ -693,7 +693,7 @@ static noinline_for_stack void vivid_thread_vid_cap_tick(struct vivid_dev *dev,
/* Drop a certain percentage of buffers. */
if (dev->perc_dropped_buffers &&
prandom_u32_max(100) < dev->perc_dropped_buffers)
get_random_u32_below(100) < dev->perc_dropped_buffers)
goto update_mv;
spin_lock(&dev->slock);

2
drivers/media/test-drivers/vivid/vivid-kthread-out.c
View File

@ -51,7 +51,7 @@ static void vivid_thread_vid_out_tick(struct vivid_dev *dev)
/* Drop a certain percentage of buffers. */
if (dev->perc_dropped_buffers &&
prandom_u32_max(100) < dev->perc_dropped_buffers)
get_random_u32_below(100) < dev->perc_dropped_buffers)
return;
spin_lock(&dev->slock);

4
drivers/media/test-drivers/vivid/vivid-radio-rx.c
View File

@ -94,8 +94,8 @@ retry:
if (data_blk == 0 && dev->radio_rds_loop)
vivid_radio_rds_init(dev);
if (perc && prandom_u32_max(100) < perc) {
switch (prandom_u32_max(4)) {
if (perc && get_random_u32_below(100) < perc) {
switch (get_random_u32_below(4)) {
case 0:
rds.block |= V4L2_RDS_BLOCK_CORRECTED;
break;

2
drivers/media/test-drivers/vivid/vivid-sdr-cap.c
View File

@ -90,7 +90,7 @@ static void vivid_thread_sdr_cap_tick(struct vivid_dev *dev)
/* Drop a certain percentage of buffers. */
if (dev->perc_dropped_buffers &&
prandom_u32_max(100) < dev->perc_dropped_buffers)
get_random_u32_below(100) < dev->perc_dropped_buffers)
return;
spin_lock(&dev->slock);

2
drivers/media/test-drivers/vivid/vivid-touch-cap.c
View File

@ -221,7 +221,7 @@ static void vivid_fill_buff_noise(__s16 *tch_buf, int size)
static inline int get_random_pressure(void)
{
return prandom_u32_max(VIVID_PRESSURE_LIMIT);
return get_random_u32_below(VIVID_PRESSURE_LIMIT);
}
static void vivid_tch_buf_set(struct v4l2_pix_format *f,

4
drivers/mmc/core/core.c
View File

@ -97,8 +97,8 @@ static void mmc_should_fail_request(struct mmc_host *host,
!should_fail(&host->fail_mmc_request, data->blksz * data->blocks))
return;
data->error = data_errors[prandom_u32_max(ARRAY_SIZE(data_errors))];
data->bytes_xfered = prandom_u32_max(data->bytes_xfered >> 9) << 9;
data->error = data_errors[get_random_u32_below(ARRAY_SIZE(data_errors))];
data->bytes_xfered = get_random_u32_below(data->bytes_xfered >> 9) << 9;
}
#else /* CONFIG_FAIL_MMC_REQUEST */

2
drivers/mmc/host/dw_mmc.c
View File

@ -1858,7 +1858,7 @@ static void dw_mci_start_fault_timer(struct dw_mci *host)
* Try to inject the error at random points during the data transfer.
*/
hrtimer_start(&host->fault_timer,
ms_to_ktime(prandom_u32_max(25)),
ms_to_ktime(get_random_u32_below(25)),
HRTIMER_MODE_REL);
}

4
drivers/mtd/nand/raw/nandsim.c
View File

@ -1405,9 +1405,9 @@ static void ns_do_bit_flips(struct nandsim *ns, int num)
if (bitflips && get_random_u16() < (1 << 6)) {
int flips = 1;
if (bitflips > 1)
flips = prandom_u32_max(bitflips) + 1;
flips = get_random_u32_below(bitflips) + 1;
while (flips--) {
int pos = prandom_u32_max(num * 8);
int pos = get_random_u32_below(num * 8);
ns->buf.byte[pos / 8] ^= (1 << (pos % 8));
NS_WARN("read_page: flipping bit %d in page %d "
"reading from %d ecc: corrected=%u failed=%u\n",

10
drivers/mtd/tests/mtd_nandecctest.c
View File

@ -47,7 +47,7 @@ struct nand_ecc_test {
static void single_bit_error_data(void *error_data, void *correct_data,
size_t size)
{
unsigned int offset = prandom_u32_max(size * BITS_PER_BYTE);
unsigned int offset = get_random_u32_below(size * BITS_PER_BYTE);
memcpy(error_data, correct_data, size);
__change_bit_le(offset, error_data);
@ -58,9 +58,9 @@ static void double_bit_error_data(void *error_data, void *correct_data,
{
unsigned int offset[2];
offset[0] = prandom_u32_max(size * BITS_PER_BYTE);
offset[0] = get_random_u32_below(size * BITS_PER_BYTE);
do {
offset[1] = prandom_u32_max(size * BITS_PER_BYTE);
offset[1] = get_random_u32_below(size * BITS_PER_BYTE);
} while (offset[0] == offset[1]);
memcpy(error_data, correct_data, size);
@ -71,7 +71,7 @@ static void double_bit_error_data(void *error_data, void *correct_data,
static unsigned int random_ecc_bit(size_t size)
{
unsigned int offset = prandom_u32_max(3 * BITS_PER_BYTE);
unsigned int offset = get_random_u32_below(3 * BITS_PER_BYTE);
if (size == 256) {
/*
@ -79,7 +79,7 @@ static unsigned int random_ecc_bit(size_t size)
* and 17th bit) in ECC code for 256 byte data block
*/
while (offset == 16 || offset == 17)
offset = prandom_u32_max(3 * BITS_PER_BYTE);
offset = get_random_u32_below(3 * BITS_PER_BYTE);
}
return offset;

8
drivers/mtd/tests/stresstest.c
View File

@ -46,7 +46,7 @@ static int rand_eb(void)
again:
/* Read or write up 2 eraseblocks at a time - hence 'ebcnt - 1' */
eb = prandom_u32_max(ebcnt - 1);
eb = get_random_u32_below(ebcnt - 1);
if (bbt[eb])
goto again;
return eb;
@ -54,12 +54,12 @@ again:
static int rand_offs(void)
{
return prandom_u32_max(bufsize);
return get_random_u32_below(bufsize);
}
static int rand_len(int offs)
{
return prandom_u32_max(bufsize - offs);
return get_random_u32_below(bufsize - offs);
}
static int do_read(void)
@ -118,7 +118,7 @@ static int do_write(void)
static int do_operation(void)
{
if (prandom_u32_max(2))
if (get_random_u32_below(2))
return do_read();
else
return do_write();

2
drivers/mtd/ubi/debug.c
View File

@ -590,7 +590,7 @@ int ubi_dbg_power_cut(struct ubi_device *ubi, int caller)
if (ubi->dbg.power_cut_max > ubi->dbg.power_cut_min) {
range = ubi->dbg.power_cut_max - ubi->dbg.power_cut_min;
ubi->dbg.power_cut_counter += prandom_u32_max(range);
ubi->dbg.power_cut_counter += get_random_u32_below(range);
}
return 0;
}

6
drivers/mtd/ubi/debug.h
View File

@ -73,7 +73,7 @@ static inline int ubi_dbg_is_bgt_disabled(const struct ubi_device *ubi)
static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi)
{
if (ubi->dbg.emulate_bitflips)
return !prandom_u32_max(200);
return !get_random_u32_below(200);
return 0;
}
@ -87,7 +87,7 @@ static inline int ubi_dbg_is_bitflip(const struct ubi_device *ubi)
static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi)
{
if (ubi->dbg.emulate_io_failures)
return !prandom_u32_max(500);
return !get_random_u32_below(500);
return 0;
}
@ -101,7 +101,7 @@ static inline int ubi_dbg_is_write_failure(const struct ubi_device *ubi)
static inline int ubi_dbg_is_erase_failure(const struct ubi_device *ubi)
{
if (ubi->dbg.emulate_io_failures)
return !prandom_u32_max(400);
return !get_random_u32_below(400);
return 0;
}

2
drivers/net/ethernet/broadcom/cnic.c
View File

@ -4105,7 +4105,7 @@ static int cnic_cm_alloc_mem(struct cnic_dev *dev)
for (i = 0; i < MAX_CM_SK_TBL_SZ; i++)
atomic_set(&cp->csk_tbl[i].ref_count, 0);
port_id = prandom_u32_max(CNIC_LOCAL_PORT_RANGE);
port_id = get_random_u32_below(CNIC_LOCAL_PORT_RANGE);
if (cnic_init_id_tbl(&cp->csk_port_tbl, CNIC_LOCAL_PORT_RANGE,
CNIC_LOCAL_PORT_MIN, port_id)) {
cnic_cm_free_mem(dev);

4
drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_io.c
View File

@ -919,8 +919,8 @@ static int csk_wait_memory(struct chtls_dev *cdev,
current_timeo = *timeo_p;
noblock = (*timeo_p ? false : true);
if (csk_mem_free(cdev, sk)) {
current_timeo = prandom_u32_max(HZ / 5) + 2;
vm_wait = prandom_u32_max(HZ / 5) + 2;
current_timeo = get_random_u32_below(HZ / 5) + 2;
vm_wait = get_random_u32_below(HZ / 5) + 2;
}
add_wait_queue(sk_sleep(sk), &wait);

2
drivers/net/phy/at803x.c
View File

@ -1758,7 +1758,7 @@ static int qca808x_phy_fast_retrain_config(struct phy_device *phydev)
static int qca808x_phy_ms_random_seed_set(struct phy_device *phydev)
{
u16 seed_value = prandom_u32_max(QCA808X_MASTER_SLAVE_SEED_RANGE);
u16 seed_value = get_random_u32_below(QCA808X_MASTER_SLAVE_SEED_RANGE);
return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED,
QCA808X_MASTER_SLAVE_SEED_CFG,

2
drivers/net/team/team_mode_random.c
View File

@ -16,7 +16,7 @@ static bool rnd_transmit(struct team *team, struct sk_buff *skb)
struct team_port *port;
int port_index;
port_index = prandom_u32_max(team->en_port_count);
port_index = get_random_u32_below(team->en_port_count);
port = team_get_port_by_index_rcu(team, port_index);
if (unlikely(!port))
goto drop;

20
drivers/net/wireguard/selftest/allowedips.c
View File

@ -285,8 +285,8 @@ static __init bool randomized_test(void)
for (i = 0; i < NUM_RAND_ROUTES; ++i) {
get_random_bytes(ip, 4);
cidr = prandom_u32_max(32) + 1;
peer = peers[prandom_u32_max(NUM_PEERS)];
cidr = get_random_u32_below(32) + 1;
peer = peers[get_random_u32_below(NUM_PEERS)];
if (wg_allowedips_insert_v4(&t, (struct in_addr *)ip, cidr,
peer, &mutex) < 0) {
pr_err("allowedips random self-test malloc: FAIL\n");
@ -300,7 +300,7 @@ static __init bool randomized_test(void)
for (j = 0; j < NUM_MUTATED_ROUTES; ++j) {
memcpy(mutated, ip, 4);
get_random_bytes(mutate_mask, 4);
mutate_amount = prandom_u32_max(32);
mutate_amount = get_random_u32_below(32);
for (k = 0; k < mutate_amount / 8; ++k)
mutate_mask[k] = 0xff;
mutate_mask[k] = 0xff
@ -311,8 +311,8 @@ static __init bool randomized_test(void)
mutated[k] = (mutated[k] & mutate_mask[k]) |
(~mutate_mask[k] &
get_random_u8());
cidr = prandom_u32_max(32) + 1;
peer = peers[prandom_u32_max(NUM_PEERS)];
cidr = get_random_u32_below(32) + 1;
peer = peers[get_random_u32_below(NUM_PEERS)];
if (wg_allowedips_insert_v4(&t,
(struct in_addr *)mutated,
cidr, peer, &mutex) < 0) {
@ -329,8 +329,8 @@ static __init bool randomized_test(void)
for (i = 0; i < NUM_RAND_ROUTES; ++i) {
get_random_bytes(ip, 16);
cidr = prandom_u32_max(128) + 1;
peer = peers[prandom_u32_max(NUM_PEERS)];
cidr = get_random_u32_below(128) + 1;
peer = peers[get_random_u32_below(NUM_PEERS)];
if (wg_allowedips_insert_v6(&t, (struct in6_addr *)ip, cidr,
peer, &mutex) < 0) {
pr_err("allowedips random self-test malloc: FAIL\n");
@ -344,7 +344,7 @@ static __init bool randomized_test(void)
for (j = 0; j < NUM_MUTATED_ROUTES; ++j) {
memcpy(mutated, ip, 16);
get_random_bytes(mutate_mask, 16);
mutate_amount = prandom_u32_max(128);
mutate_amount = get_random_u32_below(128);
for (k = 0; k < mutate_amount / 8; ++k)
mutate_mask[k] = 0xff;
mutate_mask[k] = 0xff
@ -355,8 +355,8 @@ static __init bool randomized_test(void)
mutated[k] = (mutated[k] & mutate_mask[k]) |
(~mutate_mask[k] &
get_random_u8());
cidr = prandom_u32_max(128) + 1;
peer = peers[prandom_u32_max(NUM_PEERS)];
cidr = get_random_u32_below(128) + 1;
peer = peers[get_random_u32_below(NUM_PEERS)];
if (wg_allowedips_insert_v6(&t,
(struct in6_addr *)mutated,
cidr, peer, &mutex) < 0) {

4
drivers/net/wireguard/timers.c
View File

@ -147,7 +147,7 @@ void wg_timers_data_sent(struct wg_peer *peer)
if (!timer_pending(&peer->timer_new_handshake))
mod_peer_timer(peer, &peer->timer_new_handshake,
jiffies + (KEEPALIVE_TIMEOUT + REKEY_TIMEOUT) * HZ +
prandom_u32_max(REKEY_TIMEOUT_JITTER_MAX_JIFFIES));
get_random_u32_below(REKEY_TIMEOUT_JITTER_MAX_JIFFIES));
}
/* Should be called after an authenticated data packet is received. */
@ -183,7 +183,7 @@ void wg_timers_handshake_initiated(struct wg_peer *peer)
{
mod_peer_timer(peer, &peer->timer_retransmit_handshake,
jiffies + REKEY_TIMEOUT * HZ +
prandom_u32_max(REKEY_TIMEOUT_JITTER_MAX_JIFFIES));
get_random_u32_below(REKEY_TIMEOUT_JITTER_MAX_JIFFIES));
}
/* Should be called after a handshake response message is received and processed

2
drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c
View File

@ -1128,7 +1128,7 @@ static void brcmf_p2p_afx_handler(struct work_struct *work)
if (afx_hdl->is_listen && afx_hdl->my_listen_chan)
/* 100ms ~ 300ms */
err = brcmf_p2p_discover_listen(p2p, afx_hdl->my_listen_chan,
100 * (1 + prandom_u32_max(3)));
100 * (1 + get_random_u32_below(3)));
else
err = brcmf_p2p_act_frm_search(p2p, afx_hdl->peer_listen_chan);

2
drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
View File

@ -1099,7 +1099,7 @@ static void iwl_mvm_mac_ctxt_cmd_fill_ap(struct iwl_mvm *mvm,
iwl_mvm_mac_ap_iterator, &data);
if (data.beacon_device_ts) {
u32 rand = prandom_u32_max(64 - 36) + 36;
u32 rand = get_random_u32_below(64 - 36) + 36;
mvmvif->ap_beacon_time = data.beacon_device_ts +
ieee80211_tu_to_usec(data.beacon_int * rand /
100);

2
drivers/pci/p2pdma.c
View File

@ -673,7 +673,7 @@ struct pci_dev *pci_p2pmem_find_many(struct device **clients, int num_clients)
}
if (dev_cnt)
pdev = pci_dev_get(closest_pdevs[prandom_u32_max(dev_cnt)]);
pdev = pci_dev_get(closest_pdevs[get_random_u32_below(dev_cnt)]);
for (i = 0; i < dev_cnt; i++)
pci_dev_put(closest_pdevs[i]);

2
drivers/s390/scsi/zfcp_fc.c
View File

@ -48,7 +48,7 @@ unsigned int zfcp_fc_port_scan_backoff(void)
{
if (!port_scan_backoff)
return 0;
return prandom_u32_max(port_scan_backoff);
return get_random_u32_below(port_scan_backoff);
}
static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter)

4
drivers/scsi/fcoe/fcoe_ctlr.c
View File

@ -2233,7 +2233,7 @@ static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
fip->probe_tries++;
wait = prandom_u32_max(FIP_VN_PROBE_WAIT);
wait = get_random_u32_below(FIP_VN_PROBE_WAIT);
} else
wait = FIP_VN_RLIM_INT;
mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
@ -3125,7 +3125,7 @@ static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
fcoe_all_vn2vn, 0);
fip->port_ka_time = jiffies +
msecs_to_jiffies(FIP_VN_BEACON_INT +
prandom_u32_max(FIP_VN_BEACON_FUZZ));
get_random_u32_below(FIP_VN_BEACON_FUZZ));
}
if (time_before(fip->port_ka_time, next_time))
next_time = fip->port_ka_time;

2
drivers/scsi/qedi/qedi_main.c
View File

@ -618,7 +618,7 @@ static int qedi_cm_alloc_mem(struct qedi_ctx *qedi)
sizeof(struct qedi_endpoint *)), GFP_KERNEL);
if (!qedi->ep_tbl)
return -ENOMEM;
port_id = prandom_u32_max(QEDI_LOCAL_PORT_RANGE);
port_id = get_random_u32_below(QEDI_LOCAL_PORT_RANGE);
if (qedi_init_id_tbl(&qedi->lcl_port_tbl, QEDI_LOCAL_PORT_RANGE,
QEDI_LOCAL_PORT_MIN, port_id)) {
qedi_cm_free_mem(qedi);

6
drivers/scsi/scsi_debug.c
View File

@ -5702,16 +5702,16 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
u64 ns = jiffies_to_nsecs(delta_jiff);
if (sdebug_random && ns < U32_MAX) {
ns = prandom_u32_max((u32)ns);
ns = get_random_u32_below((u32)ns);
} else if (sdebug_random) {
ns >>= 12; /* scale to 4 usec precision */
if (ns < U32_MAX) /* over 4 hours max */
ns = prandom_u32_max((u32)ns);
ns = get_random_u32_below((u32)ns);
ns <<= 12;
}
kt = ns_to_ktime(ns);
} else { /* ndelay has a 4.2 second max */
kt = sdebug_random ? prandom_u32_max((u32)ndelay) :
kt = sdebug_random ? get_random_u32_below((u32)ndelay) :
(u32)ndelay;
if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
u64 d = ktime_get_boottime_ns() - ns_from_boot;

2
fs/ceph/inode.c
View File

@ -362,7 +362,7 @@ static int ceph_fill_fragtree(struct inode *inode,
if (nsplits != ci->i_fragtree_nsplits) {
update = true;
} else if (nsplits) {
i = prandom_u32_max(nsplits);
i = get_random_u32_below(nsplits);
id = le32_to_cpu(fragtree->splits[i].frag);
if (!__ceph_find_frag(ci, id))
update = true;

2
fs/ceph/mdsmap.c
View File

@ -29,7 +29,7 @@ static int __mdsmap_get_random_mds(struct ceph_mdsmap *m, bool ignore_laggy)
return -1;
/* pick */
n = prandom_u32_max(n);
n = get_random_u32_below(n);
for (j = 0, i = 0; i < m->possible_max_rank; i++) {
if (CEPH_MDS_IS_READY(i, ignore_laggy))
j++;

2
fs/ext2/ialloc.c
View File

@ -277,7 +277,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent)
int best_ndir = inodes_per_group;
int best_group = -1;
parent_group = prandom_u32_max(ngroups);
parent_group = get_random_u32_below(ngroups);
for (i = 0; i < ngroups; i++) {
group = (parent_group + i) % ngroups;
desc = ext2_get_group_desc (sb, group, NULL);

2
fs/ext4/ialloc.c
View File

@ -465,7 +465,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
ext4fs_dirhash(parent, qstr->name, qstr->len, &hinfo);
parent_group = hinfo.hash % ngroups;
} else
parent_group = prandom_u32_max(ngroups);
parent_group = get_random_u32_below(ngroups);
for (i = 0; i < ngroups; i++) {
g = (parent_group + i) % ngroups;
get_orlov_stats(sb, g, flex_size, &stats);

5
fs/ext4/super.c
View File

@ -3778,7 +3778,7 @@ cont_thread:
}
if (!progress) {
elr->lr_next_sched = jiffies +
prandom_u32_max(EXT4_DEF_LI_MAX_START_DELAY * HZ);
get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ);
}
if (time_before(elr->lr_next_sched, next_wakeup))
next_wakeup = elr->lr_next_sched;
@ -3925,8 +3925,7 @@ static struct ext4_li_request *ext4_li_request_new(struct super_block *sb,
* spread the inode table initialization requests
* better.
*/
elr->lr_next_sched = jiffies + prandom_u32_max(
EXT4_DEF_LI_MAX_START_DELAY * HZ);
elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ);
return elr;
}

2
fs/f2fs/gc.c
View File

@ -282,7 +282,7 @@ static void select_policy(struct f2fs_sb_info *sbi, int gc_type,
/* let's select beginning hot/small space first in no_heap mode*/
if (f2fs_need_rand_seg(sbi))
p->offset = prandom_u32_max(MAIN_SECS(sbi) * sbi->segs_per_sec);
p->offset = get_random_u32_below(MAIN_SECS(sbi) * sbi->segs_per_sec);
else if (test_opt(sbi, NOHEAP) &&
(type == CURSEG_HOT_DATA || IS_NODESEG(type)))
p->offset = 0;

8
fs/f2fs/segment.c
View File

@ -2534,7 +2534,7 @@ static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
sanity_check_seg_type(sbi, seg_type);
if (f2fs_need_rand_seg(sbi))
return prandom_u32_max(MAIN_SECS(sbi) * sbi->segs_per_sec);
return get_random_u32_below(MAIN_SECS(sbi) * sbi->segs_per_sec);
/* if segs_per_sec is large than 1, we need to keep original policy. */
if (__is_large_section(sbi))
@ -2588,7 +2588,7 @@ static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
curseg->alloc_type = LFS;
if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
curseg->fragment_remained_chunk =
prandom_u32_max(sbi->max_fragment_chunk) + 1;
get_random_u32_below(sbi->max_fragment_chunk) + 1;
}
static int __next_free_blkoff(struct f2fs_sb_info *sbi,
@ -2625,9 +2625,9 @@ static void __refresh_next_blkoff(struct f2fs_sb_info *sbi,
/* To allocate block chunks in different sizes, use random number */
if (--seg->fragment_remained_chunk <= 0) {
seg->fragment_remained_chunk =
prandom_u32_max(sbi->max_fragment_chunk) + 1;
get_random_u32_below(sbi->max_fragment_chunk) + 1;
seg->next_blkoff +=
prandom_u32_max(sbi->max_fragment_hole) + 1;
get_random_u32_below(sbi->max_fragment_hole) + 1;
}
}
}

8
fs/ubifs/debug.c
View File

@ -2467,7 +2467,7 @@ error_dump:
static inline int chance(unsigned int n, unsigned int out_of)
{
return !!(prandom_u32_max(out_of) + 1 <= n);
return !!(get_random_u32_below(out_of) + 1 <= n);
}
@ -2485,13 +2485,13 @@ static int power_cut_emulated(struct ubifs_info *c, int lnum, int write)
if (chance(1, 2)) {
d->pc_delay = 1;
/* Fail within 1 minute */
delay = prandom_u32_max(60000);
delay = get_random_u32_below(60000);
d->pc_timeout = jiffies;
d->pc_timeout += msecs_to_jiffies(delay);
ubifs_warn(c, "failing after %lums", delay);
} else {
d->pc_delay = 2;
delay = prandom_u32_max(10000);
delay = get_random_u32_below(10000);
/* Fail within 10000 operations */
d->pc_cnt_max = delay;
ubifs_warn(c, "failing after %lu calls", delay);
@ -2571,7 +2571,7 @@ static int corrupt_data(const struct ubifs_info *c, const void *buf,
unsigned int from, to, ffs = chance(1, 2);
unsigned char *p = (void *)buf;
from = prandom_u32_max(len);
from = get_random_u32_below(len);
/* Corruption span max to end of write unit */
to = min(len, ALIGN(from + 1, c->max_write_size));

14
fs/ubifs/lpt_commit.c
View File

@ -1970,28 +1970,28 @@ static int dbg_populate_lsave(struct ubifs_info *c)
if (!dbg_is_chk_gen(c))
return 0;
if (prandom_u32_max(4))
if (get_random_u32_below(4))
return 0;
for (i = 0; i < c->lsave_cnt; i++)
c->lsave[i] = c->main_first;
list_for_each_entry(lprops, &c->empty_list, list)
c->lsave[prandom_u32_max(c->lsave_cnt)] = lprops->lnum;
c->lsave[get_random_u32_below(c->lsave_cnt)] = lprops->lnum;
list_for_each_entry(lprops, &c->freeable_list, list)
c->lsave[prandom_u32_max(c->lsave_cnt)] = lprops->lnum;
c->lsave[get_random_u32_below(c->lsave_cnt)] = lprops->lnum;
list_for_each_entry(lprops, &c->frdi_idx_list, list)
c->lsave[prandom_u32_max(c->lsave_cnt)] = lprops->lnum;
c->lsave[get_random_u32_below(c->lsave_cnt)] = lprops->lnum;
heap = &c->lpt_heap[LPROPS_DIRTY_IDX - 1];
for (i = 0; i < heap->cnt; i++)
c->lsave[prandom_u32_max(c->lsave_cnt)] = heap->arr[i]->lnum;
c->lsave[get_random_u32_below(c->lsave_cnt)] = heap->arr[i]->lnum;
heap = &c->lpt_heap[LPROPS_DIRTY - 1];
for (i = 0; i < heap->cnt; i++)
c->lsave[prandom_u32_max(c->lsave_cnt)] = heap->arr[i]->lnum;
c->lsave[get_random_u32_below(c->lsave_cnt)] = heap->arr[i]->lnum;
heap = &c->lpt_heap[LPROPS_FREE - 1];
for (i = 0; i < heap->cnt; i++)
c->lsave[prandom_u32_max(c->lsave_cnt)] = heap->arr[i]->lnum;
c->lsave[get_random_u32_below(c->lsave_cnt)] = heap->arr[i]->lnum;
return 1;
}

2
fs/ubifs/tnc_commit.c
View File

@ -700,7 +700,7 @@ static int alloc_idx_lebs(struct ubifs_info *c, int cnt)
c->ilebs[c->ileb_cnt++] = lnum;
dbg_cmt("LEB %d", lnum);
}
if (dbg_is_chk_index(c) && !prandom_u32_max(8))
if (dbg_is_chk_index(c) && !get_random_u32_below(8))
return -ENOSPC;
return 0;
}

2
fs/xfs/libxfs/xfs_alloc.c
View File

@ -1516,7 +1516,7 @@ xfs_alloc_ag_vextent_lastblock(
#ifdef DEBUG
/* Randomly don't execute the first algorithm. */
if (prandom_u32_max(2))
if (get_random_u32_below(2))
return 0;
#endif

2
fs/xfs/libxfs/xfs_ialloc.c
View File

@ -636,7 +636,7 @@ xfs_ialloc_ag_alloc(
/* randomly do sparse inode allocations */
if (xfs_has_sparseinodes(tp->t_mountp) &&
igeo->ialloc_min_blks < igeo->ialloc_blks)
do_sparse = prandom_u32_max(2);
do_sparse = get_random_u32_below(2);
#endif
/*

2
fs/xfs/xfs_error.c
View File

@ -279,7 +279,7 @@ xfs_errortag_test(
ASSERT(error_tag < XFS_ERRTAG_MAX);
randfactor = mp->m_errortag[error_tag];
if (!randfactor || prandom_u32_max(randfactor))
if (!randfactor || get_random_u32_below(randfactor))
return false;
xfs_warn_ratelimited(mp,

2
include/linux/damon.h
View File

@ -21,7 +21,7 @@
/* Get a random number in [l, r) */
static inline unsigned long damon_rand(unsigned long l, unsigned long r)
{
return l + prandom_u32_max(r - l);
return l + get_random_u32_below(r - l);
}
/**

2
include/linux/nodemask.h
View File

@ -516,7 +516,7 @@ static inline int node_random(const nodemask_t *maskp)
bit = first_node(*maskp);
break;
default:
bit = find_nth_bit(maskp->bits, MAX_NUMNODES, prandom_u32_max(w));
bit = find_nth_bit(maskp->bits, MAX_NUMNODES, get_random_u32_below(w));
break;
}
return bit;

4
kernel/bpf/core.c
View File

@ -1032,7 +1032,7 @@ bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr,
hdr->size = size;
hole = min_t(unsigned int, size - (proglen + sizeof(*hdr)),
PAGE_SIZE - sizeof(*hdr));
start = prandom_u32_max(hole) & ~(alignment - 1);
start = get_random_u32_below(hole) & ~(alignment - 1);
/* Leave a random number of instructions before BPF code. */
*image_ptr = &hdr->image[start];
@ -1094,7 +1094,7 @@ bpf_jit_binary_pack_alloc(unsigned int proglen, u8 **image_ptr,
hole = min_t(unsigned int, size - (proglen + sizeof(*ro_header)),
BPF_PROG_CHUNK_SIZE - sizeof(*ro_header));
start = prandom_u32_max(hole) & ~(alignment - 1);
start = get_random_u32_below(hole) & ~(alignment - 1);
*image_ptr = &ro_header->image[start];
*rw_image = &(*rw_header)->image[start];

4
kernel/kcsan/selftest.c
View File

@ -31,8 +31,8 @@ static bool __init test_encode_decode(void)
int i;
for (i = 0; i < ITERS_PER_TEST; ++i) {
size_t size = prandom_u32_max(MAX_ENCODABLE_SIZE) + 1;
bool is_write = !!prandom_u32_max(2);
size_t size = get_random_u32_below(MAX_ENCODABLE_SIZE) + 1;
bool is_write = !!get_random_u32_below(2);
unsigned long verif_masked_addr;
long encoded_watchpoint;
bool verif_is_write;

4
kernel/locking/test-ww_mutex.c
View File

@ -399,7 +399,7 @@ static int *get_random_order(int count)
order[n] = n;
for (n = count - 1; n > 1; n--) {
r = prandom_u32_max(n + 1);
r = get_random_u32_below(n + 1);
if (r != n) {
tmp = order[n];
order[n] = order[r];
@ -538,7 +538,7 @@ static void stress_one_work(struct work_struct *work)
{
struct stress *stress = container_of(work, typeof(*stress), work);
const int nlocks = stress->nlocks;
struct ww_mutex *lock = stress->locks + prandom_u32_max(nlocks);
struct ww_mutex *lock = stress->locks + get_random_u32_below(nlocks);
int err;
do {

2
kernel/time/clocksource.c
View File

@ -310,7 +310,7 @@ static void clocksource_verify_choose_cpus(void)
* CPUs that are currently online.
*/
for (i = 1; i < n; i++) {
cpu = prandom_u32_max(nr_cpu_ids);
cpu = get_random_u32_below(nr_cpu_ids);
cpu = cpumask_next(cpu - 1, cpu_online_mask);
if (cpu >= nr_cpu_ids)
cpu = cpumask_first(cpu_online_mask);

2
lib/fault-inject.c
View File

@ -139,7 +139,7 @@ bool should_fail(struct fault_attr *attr, ssize_t size)
return false;
}
if (attr->probability <= prandom_u32_max(100))
if (attr->probability <= get_random_u32_below(100))
return false;
if (!fail_stacktrace(attr))

4
lib/find_bit_benchmark.c
View File

@ -174,8 +174,8 @@ static int __init find_bit_test(void)
bitmap_zero(bitmap2, BITMAP_LEN);
while (nbits--) {
__set_bit(prandom_u32_max(BITMAP_LEN), bitmap);
__set_bit(prandom_u32_max(BITMAP_LEN), bitmap2);
__set_bit(get_random_u32_below(BITMAP_LEN), bitmap);
__set_bit(get_random_u32_below(BITMAP_LEN), bitmap2);
}
test_find_next_bit(bitmap, BITMAP_LEN);

2
lib/kobject.c
View File

@ -694,7 +694,7 @@ static void kobject_release(struct kref *kref)
{
struct kobject *kobj = container_of(kref, struct kobject, kref);
#ifdef CONFIG_DEBUG_KOBJECT_RELEASE
unsigned long delay = HZ + HZ * prandom_u32_max(4);
unsigned long delay = HZ + HZ * get_random_u32_below(4);
pr_info("kobject: '%s' (%p): %s, parent %p (delayed %ld)\n",
kobject_name(kobj), kobj, __func__, kobj->parent, delay);
INIT_DELAYED_WORK(&kobj->release, kobject_delayed_cleanup);

6
lib/reed_solomon/test_rslib.c
View File

@ -183,7 +183,7 @@ static int get_rcw_we(struct rs_control *rs, struct wspace *ws,
do {
/* Must not choose the same location twice */
errloc = prandom_u32_max(len);
errloc = get_random_u32_below(len);
} while (errlocs[errloc] != 0);
errlocs[errloc] = 1;
@ -194,12 +194,12 @@ static int get_rcw_we(struct rs_control *rs, struct wspace *ws,
for (i = 0; i < eras; i++) {
do {
/* Must not choose the same location twice */
errloc = prandom_u32_max(len);
errloc = get_random_u32_below(len);
} while (errlocs[errloc] != 0);
derrlocs[i] = errloc;
if (ewsc && prandom_u32_max(2)) {
if (ewsc && get_random_u32_below(2)) {
/* Erasure with the symbol intact */
errlocs[errloc] = 2;
} else {

4
lib/sbitmap.c
View File

@ -21,7 +21,7 @@ static int init_alloc_hint(struct sbitmap *sb, gfp_t flags)
int i;
for_each_possible_cpu(i)
*per_cpu_ptr(sb->alloc_hint, i) = prandom_u32_max(depth);
*per_cpu_ptr(sb->alloc_hint, i) = get_random_u32_below(depth);
}
return 0;
}
@ -33,7 +33,7 @@ static inline unsigned update_alloc_hint_before_get(struct sbitmap *sb,
hint = this_cpu_read(*sb->alloc_hint);
if (unlikely(hint >= depth)) {
hint = depth ? prandom_u32_max(depth) : 0;
hint = depth ? get_random_u32_below(depth) : 0;
this_cpu_write(*sb->alloc_hint, hint);
}

2
lib/test-string_helpers.c
View File

@ -587,7 +587,7 @@ static int __init test_string_helpers_init(void)
for (i = 0; i < UNESCAPE_ALL_MASK + 1; i++)
test_string_unescape("unescape", i, false);
test_string_unescape("unescape inplace",
prandom_u32_max(UNESCAPE_ANY + 1), true);
get_random_u32_below(UNESCAPE_ANY + 1), true);
/* Without dictionary */
for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)

10
lib/test_hexdump.c
View File

@ -149,7 +149,7 @@ static void __init test_hexdump(size_t len, int rowsize, int groupsize,
static void __init test_hexdump_set(int rowsize, bool ascii)
{
size_t d = min_t(size_t, sizeof(data_b), rowsize);
size_t len = prandom_u32_max(d) + 1;
size_t len = get_random_u32_below(d) + 1;
test_hexdump(len, rowsize, 4, ascii);
test_hexdump(len, rowsize, 2, ascii);
@ -208,11 +208,11 @@ static void __init test_hexdump_overflow(size_t buflen, size_t len,
static void __init test_hexdump_overflow_set(size_t buflen, bool ascii)
{
unsigned int i = 0;
int rs = (prandom_u32_max(2) + 1) * 16;
int rs = (get_random_u32_below(2) + 1) * 16;
do {
int gs = 1 << i;
size_t len = prandom_u32_max(rs) + gs;
size_t len = get_random_u32_below(rs) + gs;
test_hexdump_overflow(buflen, rounddown(len, gs), rs, gs, ascii);
} while (i++ < 3);
@ -223,11 +223,11 @@ static int __init test_hexdump_init(void)
unsigned int i;
int rowsize;
rowsize = (prandom_u32_max(2) + 1) * 16;
rowsize = (get_random_u32_below(2) + 1) * 16;
for (i = 0; i < 16; i++)
test_hexdump_set(rowsize, false);
rowsize = (prandom_u32_max(2) + 1) * 16;
rowsize = (get_random_u32_below(2) + 1) * 16;
for (i = 0; i < 16; i++)
test_hexdump_set(rowsize, true);

2
lib/test_list_sort.c
View File

@ -71,7 +71,7 @@ static void list_sort_test(struct kunit *test)
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, el);
/* force some equivalencies */
el->value = prandom_u32_max(TEST_LIST_LEN / 3);
el->value = get_random_u32_below(TEST_LIST_LEN / 3);
el->serial = i;
el->poison1 = TEST_POISON1;
el->poison2 = TEST_POISON2;

2
lib/test_printf.c
View File

@ -126,7 +126,7 @@ __test(const char *expect, int elen, const char *fmt, ...)
* be able to print it as expected.
*/
failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap);
rand = 1 + prandom_u32_max(elen+1);
rand = 1 + get_random_u32_below(elen + 1);
/* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */
failed_tests += do_test(rand, expect, elen, fmt, ap);
failed_tests += do_test(0, expect, elen, fmt, ap);

6
lib/test_rhashtable.c
View File

@ -368,8 +368,8 @@ static int __init test_rhltable(unsigned int entries)
pr_info("test %d random rhlist add/delete operations\n", entries);
for (j = 0; j < entries; j++) {
u32 i = prandom_u32_max(entries);
u32 prand = prandom_u32_max(4);
u32 i = get_random_u32_below(entries);
u32 prand = get_random_u32_below(4);
cond_resched();
@ -396,7 +396,7 @@ static int __init test_rhltable(unsigned int entries)
}
if (prand & 2) {
i = prandom_u32_max(entries);
i = get_random_u32_below(entries);
if (test_bit(i, obj_in_table)) {
err = rhltable_remove(&rhlt, &rhl_test_objects[i].list_node, test_rht_params);
WARN(err, "cannot remove element at slot %d", i);

8
lib/test_vmalloc.c
View File

@ -151,7 +151,7 @@ static int random_size_alloc_test(void)
int i;
for (i = 0; i < test_loop_count; i++) {
n = prandom_u32_max(100) + 1;
n = get_random_u32_below(100) + 1;
p = vmalloc(n * PAGE_SIZE);
if (!p)
@ -291,12 +291,12 @@ pcpu_alloc_test(void)
return -1;
for (i = 0; i < 35000; i++) {
size = prandom_u32_max(PAGE_SIZE / 4) + 1;
size = get_random_u32_below(PAGE_SIZE / 4) + 1;
/*
* Maximum PAGE_SIZE
*/
align = 1 << (prandom_u32_max(11) + 1);
align = 1 << (get_random_u32_below(11) + 1);
pcpu[i] = __alloc_percpu(size, align);
if (!pcpu[i])
@ -391,7 +391,7 @@ static void shuffle_array(int *arr, int n)
for (i = n - 1; i > 0; i--) {
/* Cut the range. */
j = prandom_u32_max(i);
j = get_random_u32_below(i);
/* Swap indexes. */
swap(arr[i], arr[j]);

6
mm/kasan/kasan_test.c
View File

@ -1299,7 +1299,7 @@ static void match_all_not_assigned(struct kunit *test)
KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_GENERIC);
for (i = 0; i < 256; i++) {
size = prandom_u32_max(1024) + 1;
size = get_random_u32_below(1024) + 1;
ptr = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
KUNIT_EXPECT_GE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_MIN);
@ -1308,7 +1308,7 @@ static void match_all_not_assigned(struct kunit *test)
}
for (i = 0; i < 256; i++) {
order = prandom_u32_max(4) + 1;
order = get_random_u32_below(4) + 1;
pages = alloc_pages(GFP_KERNEL, order);
ptr = page_address(pages);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
@ -1321,7 +1321,7 @@ static void match_all_not_assigned(struct kunit *test)
return;
for (i = 0; i < 256; i++) {
size = prandom_u32_max(1024) + 1;
size = get_random_u32_below(1024) + 1;
ptr = vmalloc(size);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
KUNIT_EXPECT_GE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_MIN);

4
mm/kfence/core.c
View File

@ -360,9 +360,9 @@ static void *kfence_guarded_alloc(struct kmem_cache *cache, size_t size, gfp_t g
unsigned long flags;
struct slab *slab;
void *addr;
const bool random_right_allocate = prandom_u32_max(2);
const bool random_right_allocate = get_random_u32_below(2);
const bool random_fault = CONFIG_KFENCE_STRESS_TEST_FAULTS &&
!prandom_u32_max(CONFIG_KFENCE_STRESS_TEST_FAULTS);
!get_random_u32_below(CONFIG_KFENCE_STRESS_TEST_FAULTS);
/* Try to obtain a free object. */
raw_spin_lock_irqsave(&kfence_freelist_lock, flags);

4
mm/kfence/kfence_test.c
View File

@ -532,8 +532,8 @@ static void test_free_bulk(struct kunit *test)
int iter;
for (iter = 0; iter < 5; iter++) {
const size_t size = setup_test_cache(test, 8 + prandom_u32_max(300), 0,
(iter & 1) ? ctor_set_x : NULL);
const size_t size = setup_test_cache(test, 8 + get_random_u32_below(300),
0, (iter & 1) ? ctor_set_x : NULL);
void *objects[] = {
test_alloc(test, size, GFP_KERNEL, ALLOCATE_RIGHT),
test_alloc(test, size, GFP_KERNEL, ALLOCATE_NONE),

2
mm/slub.c
View File

@ -1881,7 +1881,7 @@ static bool shuffle_freelist(struct kmem_cache *s, struct slab *slab)
return false;
freelist_count = oo_objects(s->oo);
pos = prandom_u32_max(freelist_count);
pos = get_random_u32_below(freelist_count);
page_limit = slab->objects * s->size;
start = fixup_red_left(s, slab_address(slab));

4
mm/swapfile.c
View File

@ -773,7 +773,7 @@ static void set_cluster_next(struct swap_info_struct *si, unsigned long next)
if (si->highest_bit <= si->lowest_bit)
return;
next = si->lowest_bit +
prandom_u32_max(si->highest_bit - si->lowest_bit + 1);
get_random_u32_below(si->highest_bit - si->lowest_bit + 1);
next = ALIGN_DOWN(next, SWAP_ADDRESS_SPACE_PAGES);
next = max_t(unsigned int, next, si->lowest_bit);
}
@ -3089,7 +3089,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
*/
for_each_possible_cpu(cpu) {
per_cpu(*p->cluster_next_cpu, cpu) =
1 + prandom_u32_max(p->highest_bit);
1 + get_random_u32_below(p->highest_bit);
}
nr_cluster = DIV_ROUND_UP(maxpages, SWAPFILE_CLUSTER);

2
net/802/garp.c
View File

@ -407,7 +407,7 @@ static void garp_join_timer_arm(struct garp_applicant *app)
{
unsigned long delay;
delay = prandom_u32_max(msecs_to_jiffies(garp_join_time));
delay = get_random_u32_below(msecs_to_jiffies(garp_join_time));
mod_timer(&app->join_timer, jiffies + delay);
}

2
net/802/mrp.c
View File

@ -592,7 +592,7 @@ static void mrp_join_timer_arm(struct mrp_applicant *app)
{
unsigned long delay;
delay = prandom_u32_max(msecs_to_jiffies(mrp_join_time));
delay = get_random_u32_below(msecs_to_jiffies(mrp_join_time));
mod_timer(&app->join_timer, jiffies + delay);
}

4
net/batman-adv/bat_iv_ogm.c
View File

@ -280,7 +280,7 @@ batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv)
unsigned int msecs;
msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER;
msecs += prandom_u32_max(2 * BATADV_JITTER);
msecs += get_random_u32_below(2 * BATADV_JITTER);
return jiffies + msecs_to_jiffies(msecs);
}
@ -288,7 +288,7 @@ batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv)
/* when do we schedule a ogm packet to be sent */
static unsigned long batadv_iv_ogm_fwd_send_time(void)
{
return jiffies + msecs_to_jiffies(prandom_u32_max(BATADV_JITTER / 2));
return jiffies + msecs_to_jiffies(get_random_u32_below(BATADV_JITTER / 2));
}
/* apply hop penalty for a normal link */

2
net/batman-adv/bat_v_elp.c
View File

@ -51,7 +51,7 @@ static void batadv_v_elp_start_timer(struct batadv_hard_iface *hard_iface)
unsigned int msecs;
msecs = atomic_read(&hard_iface->bat_v.elp_interval) - BATADV_JITTER;
msecs += prandom_u32_max(2 * BATADV_JITTER);
msecs += get_random_u32_below(2 * BATADV_JITTER);
queue_delayed_work(batadv_event_workqueue, &hard_iface->bat_v.elp_wq,
msecs_to_jiffies(msecs));

4
net/batman-adv/bat_v_ogm.c
View File

@ -90,7 +90,7 @@ static void batadv_v_ogm_start_queue_timer(struct batadv_hard_iface *hard_iface)
unsigned int msecs = BATADV_MAX_AGGREGATION_MS * 1000;
/* msecs * [0.9, 1.1] */
msecs += prandom_u32_max(msecs / 5) - (msecs / 10);
msecs += get_random_u32_below(msecs / 5) - (msecs / 10);
queue_delayed_work(batadv_event_workqueue, &hard_iface->bat_v.aggr_wq,
msecs_to_jiffies(msecs / 1000));
}
@ -109,7 +109,7 @@ static void batadv_v_ogm_start_timer(struct batadv_priv *bat_priv)
return;
msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER;
msecs += prandom_u32_max(2 * BATADV_JITTER);
msecs += get_random_u32_below(2 * BATADV_JITTER);
queue_delayed_work(batadv_event_workqueue, &bat_priv->bat_v.ogm_wq,
msecs_to_jiffies(msecs));
}

2
net/batman-adv/network-coding.c
View File

@ -1009,7 +1009,7 @@ static struct batadv_nc_path *batadv_nc_get_path(struct batadv_priv *bat_priv,
static u8 batadv_nc_random_weight_tq(u8 tq)
{
/* randomize the estimated packet loss (max TQ - estimated TQ) */
u8 rand_tq = prandom_u32_max(BATADV_TQ_MAX_VALUE + 1 - tq);
u8 rand_tq = get_random_u32_below(BATADV_TQ_MAX_VALUE + 1 - tq);
/* convert to (randomized) estimated tq again */
return BATADV_TQ_MAX_VALUE - rand_tq;

4
net/bluetooth/mgmt.c
View File

@ -7374,8 +7374,8 @@ static int get_conn_info(struct sock *sk, struct hci_dev *hdev, void *data,
* calculate conn info age as random value between min/max set in hdev.
*/
conn_info_age = hdev->conn_info_min_age +
prandom_u32_max(hdev->conn_info_max_age -
hdev->conn_info_min_age);
get_random_u32_below(hdev->conn_info_max_age -
hdev->conn_info_min_age);
/* Query controller to refresh cached values if they are too old or were
* never read.

2
net/can/j1939/socket.c
View File

@ -189,7 +189,7 @@ activate_next:
int time_ms = 0;
if (err)
time_ms = 10 + prandom_u32_max(16);
time_ms = 10 + get_random_u32_below(16);
j1939_tp_schedule_txtimer(first, time_ms);
}

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