From: Christophe Leroy <christophe.leroy@csgroup.eu>
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Subject: Re: [PATCH v3 3/5] treewide: use get_random_u32() when possible
Date: Thu, 6 Oct 2022 17:21:27 +0000 [thread overview]
Message-ID: <848ed24c-13ef-6c38-fd13-639b33809194@csgroup.eu> (raw)
In-Reply-To: <20221006165346.73159-4-Jason@zx2c4.com>
Le 06/10/2022 à 18:53, Jason A. Donenfeld a écrit :
> The prandom_u32() function has been a deprecated inline wrapper around
> get_random_u32() for several releases now, and compiles down to the
> exact same code. Replace the deprecated wrapper with a direct call to
> the real function. The same also applies to get_random_int(), which is
> just a wrapper around get_random_u32().
>
> Reviewed-by: Kees Cook <keescook@chromium.org>
> Acked-by: Toke Høiland-Jørgensen <toke@toke.dk> # for sch_cake
> Acked-by: Chuck Lever <chuck.lever@oracle.com> # for nfsd
> Reviewed-by: Jan Kara <jack@suse.cz> # for ext4
> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
> ---
> diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
> index 0fbda89cd1bb..9c4c15afbbe8 100644
> --- a/arch/powerpc/kernel/process.c
> +++ b/arch/powerpc/kernel/process.c
> @@ -2308,6 +2308,6 @@ void notrace __ppc64_runlatch_off(void)
> unsigned long arch_align_stack(unsigned long sp)
> {
> if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
> - sp -= get_random_int() & ~PAGE_MASK;
> + sp -= get_random_u32() & ~PAGE_MASK;
> return sp & ~0xf;
Isn't that a candidate for prandom_u32_max() ?
Note that sp is deemed to be 16 bytes aligned at all time.
Christophe
next prev parent reply other threads:[~2022-10-06 17:21 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-06 16:53 [PATCH v3 0/5] treewide cleanup of random integer usage Jason A. Donenfeld
2022-10-06 16:53 ` [PATCH v3 1/5] treewide: use prandom_u32_max() when possible Jason A. Donenfeld
2022-10-06 16:53 ` [PATCH v3 2/5] treewide: use get_random_{u8,u16}() " Jason A. Donenfeld
2022-10-06 16:53 ` [PATCH v3 3/5] treewide: use get_random_u32() " Jason A. Donenfeld
2022-10-06 17:21 ` Christophe Leroy [this message]
2022-10-06 17:24 ` Jason A. Donenfeld
2022-10-06 17:31 ` Christophe Leroy
2022-10-06 17:42 ` Christophe Leroy
2022-10-06 23:36 ` Jason A. Donenfeld
2022-10-07 4:57 ` Christophe Leroy
2022-10-07 14:07 ` Jason A. Donenfeld
2022-10-07 17:12 ` Kees Cook
2022-10-07 17:56 ` Jason A. Donenfeld
2022-10-08 21:53 ` David Laight
2022-10-09 2:57 ` Jason A. Donenfeld
2022-10-07 9:14 ` David Laight
2022-10-07 9:26 ` Mika Westerberg
2022-10-06 16:53 ` [PATCH v3 4/5] treewide: use get_random_bytes " Jason A. Donenfeld
2022-10-06 17:22 ` Christophe Leroy
2022-10-07 3:09 ` Bagas Sanjaya
2022-10-07 3:23 ` Jason A. Donenfeld
2022-10-06 16:53 ` [PATCH v3 5/5] prandom: remove unused functions Jason A. Donenfeld
2022-10-07 9:11 ` [PATCH v3 0/5] treewide cleanup of random integer usage Ulf Hansson
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