From: Richard Henderson <richard.henderson@xxxxxxxxxx> commit 904caa6413c87aacbf7d0682da617c39ca18cf1a upstream. We must not use the pointer output without validating the success of the random read. Reviewed-by: Ard Biesheuvel <ardb@xxxxxxxxxx> Signed-off-by: Richard Henderson <rth@xxxxxxxxxxx> Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Link: https://lore.kernel.org/r/20200110145422.49141-7-broonie@xxxxxxxxxx Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- include/linux/random.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/include/linux/random.h +++ b/include/linux/random.h @@ -96,19 +96,19 @@ unsigned long randomize_page(unsigned lo #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; }
