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-rw-r--r--net/ipv4/inet_hashtables.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 12808dac923a..c96866a53a66 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -818,6 +818,11 @@ next_port:
return -EADDRNOTAVAIL;
ok:
+ /* If our first attempt found a candidate, skip next candidate
+ * in 1/16 of cases to add some noise.
+ */
+ if (!i && !(prandom_u32() % 16))
+ i = 2;
WRITE_ONCE(table_perturb[index], READ_ONCE(table_perturb[index]) + i + 2);
/* Head lock still held and bh's disabled */