diff options
| author | David S. Miller <davem@davemloft.net> | 2015-05-01 22:02:47 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-11 05:34:02 -0700 |
| commit | 61815444fa0b437cd2b7a2be781a10773801e72e (patch) | |
| tree | cae27da63d790b8c1df37cef106938ba673f81c4 | |
| parent | 27bf80e8dcc3b082182ded6b481af9eb40bffbdb (diff) | |
ipv4: Missing sk_nulls_node_init() in ping_unhash().
[ Upstream commit a134f083e79fb4c3d0a925691e732c56911b4326 ]
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 0ae28f517a9b..c0db43d2e1a6 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -158,6 +158,7 @@ void ping_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 = 0; isk->inet_sport = 0; |