net/tls: Fix kmap usage
When MSG_OOB is specified to tls_device_sendpage() the mapped page is
never unmapped.
Hold off mapping the page until after the flags are checked and the page
is actually needed.
Fixes: e8f6979981
("net/tls: Add generic NIC offload infrastructure")
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -561,7 +561,7 @@ int tls_device_sendpage(struct sock *sk, struct page *page,
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{
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struct tls_context *tls_ctx = tls_get_ctx(sk);
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struct iov_iter msg_iter;
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char *kaddr = kmap(page);
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char *kaddr;
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struct kvec iov;
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int rc;
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@ -576,6 +576,7 @@ int tls_device_sendpage(struct sock *sk, struct page *page,
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goto out;
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}
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kaddr = kmap(page);
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iov.iov_base = kaddr + offset;
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iov.iov_len = size;
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iov_iter_kvec(&msg_iter, WRITE, &iov, 1, size);
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