net/tls: Fix kmap usage
[ Upstream commitb06c19d9f8
] 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -549,7 +549,7 @@ 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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@ -564,6 +564,7 @@ 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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