From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 10 Jan 2020 14:54:18 +0000 (+0000)
Subject: linux/random.h: Mark CONFIG_ARCH_RANDOM functions __must_check
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4682b96e868b6e7d48cb49f6df22a50bb11efbf0;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

linux/random.h: Mark CONFIG_ARCH_RANDOM functions __must_check

commit 904caa6413c87aacbf7d0682da617c39ca18cf1a upstream.

We must not use the pointer output without validating the
success of the random read.

Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200110145422.49141-7-broonie@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/include/linux/random.h b/include/linux/random.h
index 57fa7d52ef73..0efabaaf1eb6 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -118,19 +118,19 @@ unsigned long randomize_page(unsigned long start, unsigned long range);
 #ifdef CONFIG_ARCH_RANDOM
 # include <asm/archrandom.h>
 #else
-static inline bool arch_get_random_long(unsigned long *v)
+static inline bool __must_check arch_get_random_long(unsigned long *v)
 {
 	return false;
 }
-static inline bool arch_get_random_int(unsigned int *v)
+static inline bool __must_check arch_get_random_int(unsigned int *v)
 {
 	return false;
 }
-static inline bool arch_get_random_seed_long(unsigned long *v)
+static inline bool __must_check arch_get_random_seed_long(unsigned long *v)
 {
 	return false;
 }
-static inline bool arch_get_random_seed_int(unsigned int *v)
+static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
 {
 	return false;
 }