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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2022-10-05 17:23:53 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2022-10-12 01:42:58 +0200 |
| commit | f743f16c548b1a2633e8b6034058d6475d7f26a3 (patch) | |
| tree | c163930a1808d49fcb6bdcb897f88e3a7f8dc62e /arch | |
| parent | treewide: use get_random_{u8,u16}() when possible, part 1 (diff) | |
| download | linux-f743f16c548b1a2633e8b6034058d6475d7f26a3.tar.xz linux-f743f16c548b1a2633e8b6034058d6475d7f26a3.zip | |
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.c | 2 |
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) |