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authorJason A. Donenfeld <Jason@zx2c4.com>2022-10-10 04:44:02 +0200
committerJason A. Donenfeld <Jason@zx2c4.com>2022-11-18 02:15:15 +0100
commit8032bf1233a74627ce69b803608e650f3f35971c (patch)
tree1e15cd719358130192c59b8d5a61a0c3c9fbe82c /mm
parentrandom: add helpers for random numbers with given floor or range (diff)
downloadlinux-8032bf1233a74627ce69b803608e650f3f35971c.tar.xz
linux-8032bf1233a74627ce69b803608e650f3f35971c.zip
treewide: use get_random_u32_below() instead of deprecated function
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>
Diffstat (limited to 'mm')
-rw-r--r--mm/kasan/kasan_test.c6
-rw-r--r--mm/kfence/core.c4
-rw-r--r--mm/kfence/kfence_test.c4
-rw-r--r--mm/slub.c2
-rw-r--r--mm/swapfile.c4
5 files changed, 10 insertions, 10 deletions
diff --git a/mm/kasan/kasan_test.c b/mm/kasan/kasan_test.c
index 0d59098f0876..640f9c7f8e44 100644
--- a/mm/kasan/kasan_test.c
+++ b/mm/kasan/kasan_test.c
@@ -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);
diff --git a/mm/kfence/core.c b/mm/kfence/core.c
index 141788858b70..6cbd93f2007b 100644
--- a/mm/kfence/core.c
+++ b/mm/kfence/core.c
@@ -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);
diff --git a/mm/kfence/kfence_test.c b/mm/kfence/kfence_test.c
index a97bffe0cc3e..20028c179796 100644
--- a/mm/kfence/kfence_test.c
+++ b/mm/kfence/kfence_test.c
@@ -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),
diff --git a/mm/slub.c b/mm/slub.c
index 157527d7101b..7cd2c657030a 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -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));
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 5fc1237a9f21..e9318305a24a 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -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);