batadv_iv_ogm_emit_send_time() attempts to calculates a random integer
in the range of 'orig_interval +- BATADV_JITTER' by the below lines.
msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER;
msecs += (random32() % 2 * BATADV_JITTER);
But it actually gets 'orig_interval' or 'orig_interval - BATADV_JITTER'
because '%' and '*' have same precedence and associativity is
left-to-right.
This adds the parentheses at the appropriate position so that it matches
original intension.
Signed-off-by: Akinobu Mita <akinobu.m...@gmail.com>
Cc: Marek Lindner <lindner_ma...@yahoo.de>
Cc: Simon Wunderlich <s...@hrz.tu-chemnitz.de>
Cc: Antonio Quartulli <or...@autistici.org>
Cc: b.a.t.m....@lists.open-mesh.org
Cc: "David S. Miller" <da...@davemloft.net>
Cc: net...@vger.kernel.org
---
net/batman-adv/bat_iv_ogm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c
index 9f3925a..7d02ebd 100644
--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -123,7 +123,7 @@ batadv_iv_ogm_emit_send_time(const struct batadv_priv
*bat_priv)
unsigned int msecs;
msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER;
- msecs += (random32() % 2 * BATADV_JITTER);
+ msecs += random32() % (2 * BATADV_JITTER);
return jiffies + msecs_to_jiffies(msecs);
}
--
1.7.11.7
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