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authorJean-Philippe Brucker <jean-philippe@linaro.org>2022-10-28 19:00:42 +0300
committerJason A. Donenfeld <Jason@zx2c4.com>2022-10-29 01:24:03 +0300
commitf5e4ec155d145002fd9840868453d785fab86d42 (patch)
tree906940f765a2069c49accb4e225785250b59f622
parent23758867219c8d84c8363316e6dd2f9fd7ae3049 (diff)
downloadlinux-f5e4ec155d145002fd9840868453d785fab86d42.tar.xz
random: use arch_get_random*_early() in random_init()
While reworking the archrandom handling, commit d349ab99eec7 ("random: handle archrandom with multiple longs") switched to the non-early archrandom helpers in random_init(), which broke initialization of the entropy pool from the arm64 random generator. Indeed at that point the arm64 CPU features, which verify that all CPUs have compatible capabilities, are not finalized so arch_get_random_seed_longs() is unsuccessful. Instead random_init() should use the _early functions, which check only the boot CPU on arm64. On other architectures the _early functions directly call the normal ones. Fixes: d349ab99eec7 ("random: handle archrandom with multiple longs") Cc: stable@vger.kernel.org Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
-rw-r--r--drivers/char/random.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 2fe28eeb2f38..69754155300e 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -791,13 +791,13 @@ void __init random_init_early(const char *command_line)
#endif
for (i = 0, arch_bits = sizeof(entropy) * 8; i < ARRAY_SIZE(entropy);) {
- longs = arch_get_random_seed_longs(entropy, ARRAY_SIZE(entropy) - i);
+ longs = arch_get_random_seed_longs_early(entropy, ARRAY_SIZE(entropy) - i);
if (longs) {
_mix_pool_bytes(entropy, sizeof(*entropy) * longs);
i += longs;
continue;
}
- longs = arch_get_random_longs(entropy, ARRAY_SIZE(entropy) - i);
+ longs = arch_get_random_longs_early(entropy, ARRAY_SIZE(entropy) - i);
if (longs) {
_mix_pool_bytes(entropy, sizeof(*entropy) * longs);
i += longs;