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authorJakub Kicinski <jakub.kicinski@netronome.com>2019-08-09 18:36:23 -0700
committerDavid S. Miller <davem@davemloft.net>2019-08-09 19:55:22 -0700
commit57c722e932cfb82e9820bbaae1b1f7222ea97b52 (patch)
tree293fcf87b9004d4fc8b4af374cebbe46c65f5bfd /net/tls
parent6d0d779dca73cd5acb649c54f81401f93098b298 (diff)
downloadlinux-57c722e932cfb82e9820bbaae1b1f7222ea97b52.tar.bz2
net/tls: swap sk_write_space on close
Now that we swap the original proto and clear the ULP pointer on close we have to make sure no callback will try to access the freed state. sk_write_space is not part of sk_prot, remember to swap it. Reported-by: syzbot+dcdc9deefaec44785f32@syzkaller.appspotmail.com Fixes: 95fa145479fb ("bpf: sockmap/tls, close can race with map free") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tls')
-rw-r--r--net/tls/tls_main.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index 9cbbae606ced..ce6ef56a65ef 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -308,6 +308,7 @@ static void tls_sk_proto_close(struct sock *sk, long timeout)
if (free_ctx)
icsk->icsk_ulp_data = NULL;
sk->sk_prot = ctx->sk_proto;
+ sk->sk_write_space = ctx->sk_write_space;
write_unlock_bh(&sk->sk_callback_lock);
release_sock(sk);
if (ctx->tx_conf == TLS_SW)