From f3126725228c0fdbe17c18bcc5ace1b86465cce9 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 15 Mar 2017 13:21:28 -0700 Subject: net: properly release sk_frag.page [ Upstream commit 22a0e18eac7a9e986fec76c60fa4a2926d1291e2 ] I mistakenly added the code to release sk->sk_frag in sk_common_release() instead of sk_destruct() TCP sockets using sk->sk_allocation == GFP_ATOMIC do no call sk_common_release() at close time, thus leaking one (order-3) page. iSCSI is using such sockets. Fixes: 5640f7685831 ("net: use a per task frag allocator") Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/core/sock.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'net') diff --git a/net/core/sock.c b/net/core/sock.c index f4c0917e66b5..9f4c4473156a 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -1459,6 +1459,11 @@ void sk_destruct(struct sock *sk) pr_debug("%s: optmem leakage (%d bytes) detected\n", __func__, atomic_read(&sk->sk_omem_alloc)); + if (sk->sk_frag.page) { + put_page(sk->sk_frag.page); + sk->sk_frag.page = NULL; + } + if (sk->sk_peer_cred) put_cred(sk->sk_peer_cred); put_pid(sk->sk_peer_pid); @@ -2691,11 +2696,6 @@ void sk_common_release(struct sock *sk) sk_refcnt_debug_release(sk); - if (sk->sk_frag.page) { - put_page(sk->sk_frag.page); - sk->sk_frag.page = NULL; - } - sock_put(sk); } EXPORT_SYMBOL(sk_common_release); -- cgit v1.2.3