weichenchen a533b70a65 net: neighbor: fix a crash caused by mod zero
pneigh_enqueue() tries to obtain a random delay by mod
NEIGH_VAR(p, PROXY_DELAY). However, NEIGH_VAR(p, PROXY_DELAY)
migth be zero at that point because someone could write zero
to /proc/sys/net/ipv4/neigh/[device]/proxy_delay after the
callers check it.

This patch uses prandom_u32_max() to get a random delay instead
which avoids potential division by zero.

Signed-off-by: weichenchen <weichen.chen@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-12-28 14:49:48 -08:00
..
2020-04-20 12:43:24 -07:00
2020-03-29 22:30:57 -07:00
2020-12-14 16:40:27 -08:00
2020-06-18 20:46:23 -07:00