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authorJason A. Donenfeld <Jason@zx2c4.com>2022-10-05 17:23:53 +0200
committerJason A. Donenfeld <Jason@zx2c4.com>2022-10-11 17:42:58 -0600
commitf743f16c548b1a2633e8b6034058d6475d7f26a3 (patch)
treec163930a1808d49fcb6bdcb897f88e3a7f8dc62e /arch
parent7e3cf0843fe505491baa05e355e83e6997e089dd (diff)
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treewide: use get_random_{u8,u16}() when possible, part 2
Rather than truncate a 32-bit value to a 16-bit value or an 8-bit value, simply use the get_random_{u8,u16}() functions, which are faster than wasting the additional bytes from a 32-bit value. This was done by hand, identifying all of the places where one of the random integer functions was used in a non-32-bit context. Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Yury Norov <yury.norov@gmail.com> Acked-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Heiko Carstens <hca@linux.ibm.com> # for s390 Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/kernel/process.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 5ec78555dd2e..42af4b3aa02b 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -230,7 +230,7 @@ unsigned long arch_align_stack(unsigned long sp)
static inline unsigned long brk_rnd(void)
{
- return (get_random_int() & BRK_RND_MASK) << PAGE_SHIFT;
+ return (get_random_u16() & BRK_RND_MASK) << PAGE_SHIFT;
}
unsigned long arch_randomize_brk(struct mm_struct *mm)