diff options
Diffstat (limited to 'lib/random32.c')
| -rw-r--r-- | lib/random32.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/random32.c b/lib/random32.c index be9f242a4207..7f047844e494 100644 --- a/lib/random32.c +++ b/lib/random32.c @@ -337,6 +337,8 @@ struct siprand_state { }; static DEFINE_PER_CPU(struct siprand_state, net_rand_state) __latent_entropy; +DEFINE_PER_CPU(unsigned long, net_rand_noise); +EXPORT_PER_CPU_SYMBOL(net_rand_noise); /* * This is the core CPRNG function. As "pseudorandom", this is not used @@ -360,9 +362,12 @@ static DEFINE_PER_CPU(struct siprand_state, net_rand_state) __latent_entropy; static inline u32 siprand_u32(struct siprand_state *s) { unsigned long v0 = s->v0, v1 = s->v1, v2 = s->v2, v3 = s->v3; + unsigned long n = raw_cpu_read(net_rand_noise); + v3 ^= n; PRND_SIPROUND(v0, v1, v2, v3); PRND_SIPROUND(v0, v1, v2, v3); + v0 ^= n; s->v0 = v0; s->v1 = v1; s->v2 = v2; s->v3 = v3; return v1 + v3; } |