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net/tls: Fix inverted error codes to avoid endless loop

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sendfile() calls can hang endless with using Kernel TLS if a socket error occurs.
Socket error codes must be inverted by Kernel TLS before returning because
they are stored with positive sign. If returned non-inverted they are
interpreted as number of bytes sent, causing endless looping of the
splice mechanic behind sendfile().

Signed-off-by: Robert Hering <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
[email protected] 2018-01-12 15:42:06 +01:00 • committed by David S. Miller
commit 30be8f8dba
2 changed files with 3 additions and 3 deletions
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4
net/tls/tls_sw.c
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@ -391,7 +391,7 @@ int tls_sw_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
while (msg_data_left(msg)) {
if (sk->sk_err) {
ret = sk->sk_err;
ret = -sk->sk_err;
goto send_end;
}
@ -544,7 +544,7 @@ int tls_sw_sendpage(struct sock *sk, struct page *page,
size_t copy, required_size;
if (sk->sk_err) {
ret = sk->sk_err;
ret = -sk->sk_err;
goto sendpage_end;
}