This is a note to let you know that I've just added the patch titled linux/random.h: Mark CONFIG_ARCH_RANDOM functions __must_check to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: linux-random.h-mark-config_arch_random-functions-__must_check.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Fri Jun 17 08:58:56 AM CEST 2022 From: Richard Henderson <richard.henderson@xxxxxxxxxx> Date: Fri, 10 Jan 2020 14:54:18 +0000 Subject: linux/random.h: Mark CONFIG_ARCH_RANDOM functions __must_check 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 @@ -118,19 +118,19 @@ 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; } Patches currently in stable-queue which might be from richard.henderson@xxxxxxxxxx are queue-4.19/linux-random.h-remove-arch_has_random-arch_has_random_seed.patch queue-4.19/powerpc-remove-arch_has_random-arch_has_random_seed.patch queue-4.19/powerpc-use-bool-in-archrandom.h.patch queue-4.19/s390-remove-arch_has_random-arch_has_random_seed.patch queue-4.19/linux-random.h-mark-config_arch_random-functions-__must_check.patch queue-4.19/linux-random.h-use-false-with-bool.patch queue-4.19/x86-remove-arch_has_random-arch_has_random_seed.patch