diff options
Diffstat (limited to 'net/ipv4/af_inet.c')
| -rw-r--r-- | net/ipv4/af_inet.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 6a1100c25a9f..f581f77d1097 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -227,18 +227,16 @@ EXPORT_SYMBOL(inet_ehash_secret); /* * inet_ehash_secret must be set exactly once - * Instead of using a dedicated spinlock, we (ab)use inetsw_lock */ void build_ehash_secret(void) { u32 rnd; + do { get_random_bytes(&rnd, sizeof(rnd)); } while (rnd == 0); - spin_lock_bh(&inetsw_lock); - if (!inet_ehash_secret) - inet_ehash_secret = rnd; - spin_unlock_bh(&inetsw_lock); + + cmpxchg(&inet_ehash_secret, 0, rnd); } EXPORT_SYMBOL(build_ehash_secret); |