From: Ira Weiny <ira.weiny@intel.com> [ Upstream commit b06c19d9f827f6743122795570bfc0c72db482b0 ] 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: e8f69799810c ("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> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- net/tls/tls_device.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c index 8f40bbfd60ea9..575d621305786 100644 --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -476,7 +476,7 @@ int tls_device_sendpage(struct sock *sk, struct page *page, int offset, size_t size, int flags) { struct iov_iter msg_iter; - char *kaddr = kmap(page); + char *kaddr; struct kvec iov; int rc; @@ -490,6 +490,7 @@ int tls_device_sendpage(struct sock *sk, struct page *page, goto out; } + kaddr = kmap(page); iov.iov_base = kaddr + offset; iov.iov_len = size; iov_iter_kvec(&msg_iter, WRITE | ITER_KVEC, &iov, 1, size); -- 2.25.1