From 73155879b3c1ac3ace35208a54a3a160ec520bef Mon Sep 17 00:00:00 2001 From: David Ahern Date: Wed, 2 Jan 2019 18:26:13 -0800 Subject: [PATCH] ipv6: Fix dump of specific table with strict checking Dump of a specific table with strict checking enabled is looping. The problem is that the end of the table dump is not marked in the cb. When dumping a specific table, cb args 0 and 1 are not used (they are the hash index and entry with an hash table index when dumping all tables). Re-use args[0] to hold a 'done' flag for the specific table dump. Fixes: 13e38901d46ca ("net/ipv6: Plumb support for filtering route dumps") Reported-by: Jakub Kicinski Signed-off-by: David Ahern Signed-off-by: David S. Miller --- net/ipv6/ip6_fib.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index ae3786132c23..6613d8dbb0e5 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -627,7 +627,11 @@ static int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) return -ENOENT; } - res = fib6_dump_table(tb, skb, cb); + if (!cb->args[0]) { + res = fib6_dump_table(tb, skb, cb); + if (!res) + cb->args[0] = 1; + } goto out; }