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| author | David S. Miller <davem@davemloft.net> | 2015-05-01 22:02:47 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-05-09 23:16:36 +0100 |
| commit | d3df672020a93355bc8f683fc19694e0316381ab (patch) | |
| tree | aad607c9e831ac644841430e7b642c72e36c8056 /net | |
| parent | 470e517be17dd6ef8670bec7bd7831ea0d3ad8a6 (diff) | |
| download | lwn-d3df672020a93355bc8f683fc19694e0316381ab.tar.gz lwn-d3df672020a93355bc8f683fc19694e0316381ab.zip | |
ipv4: Missing sk_nulls_node_init() in ping_unhash().
commit a134f083e79fb4c3d0a925691e732c56911b4326 upstream.
If we don't do that, then the poison value is left in the ->pprev
backlink.
This can cause crashes if we do a disconnect, followed by a connect().
Tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Wen Xu <hotdog3645@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ping.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index d495d4bcd745..6d622622e0df 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -139,6 +139,7 @@ static void ping_v4_unhash(struct sock *sk) if (sk_hashed(sk)) { write_lock_bh(&ping_table.lock); hlist_nulls_del(&sk->sk_nulls_node); + sk_nulls_node_init(&sk->sk_nulls_node); sock_put(sk); isk->inet_num = isk->inet_sport = 0; sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |