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    Subject[PATCH 5.9 033/757] chelsio/chtls: fix panic when server is on ipv6
    Date
    From: Vinay Kumar Yadav <vinay.yadav@chelsio.com>

    [ Upstream commit 86cdf9ca4409d997a391103e480b3f77b7ccc19b ]

    Netdev is filled in egress_dev when connection is established,
    If connection is closed before establishment, then egress_dev
    is NULL, Fix it using ip_dev_find() rather then extracting from
    egress_dev.

    Fixes: 6abde0b24122 ("crypto/chtls: IPv6 support for inline TLS")
    Signed-off-by: Venkatesh Ellapu <venkatesh.e@chelsio.com>
    Signed-off-by: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/crypto/chelsio/chtls/chtls_cm.c | 5 ++---
    1 file changed, 2 insertions(+), 3 deletions(-)

    --- a/drivers/crypto/chelsio/chtls/chtls_cm.c
    +++ b/drivers/crypto/chelsio/chtls/chtls_cm.c
    @@ -736,14 +736,13 @@ void chtls_listen_stop(struct chtls_dev

    #if IS_ENABLED(CONFIG_IPV6)
    if (sk->sk_family == PF_INET6) {
    - struct chtls_sock *csk;
    + struct net_device *ndev = chtls_find_netdev(cdev, sk);
    int addr_type = 0;

    - csk = rcu_dereference_sk_user_data(sk);
    addr_type = ipv6_addr_type((const struct in6_addr *)
    &sk->sk_v6_rcv_saddr);
    if (addr_type != IPV6_ADDR_ANY)
    - cxgb4_clip_release(csk->egress_dev, (const u32 *)
    + cxgb4_clip_release(ndev, (const u32 *)
    &sk->sk_v6_rcv_saddr, 1);
    }
    #endif

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