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authorIra Weiny <ira.weiny@intel.com>2020-08-11 03:02:58 +0300
committerDavid S. Miller <davem@davemloft.net>2020-08-11 20:20:34 +0300
commitb06c19d9f827f6743122795570bfc0c72db482b0 (patch)
treeb0fee16b5e902c40afff53b91688540a9b411b00 /net/tls
parent444da3f52407d74c9aa12187ac6b01f76ee47d62 (diff)
downloadlinux-b06c19d9f827f6743122795570bfc0c72db482b0.tar.xz
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: 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>
Diffstat (limited to 'net/tls')
-rw-r--r--net/tls/tls_device.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 18fa6067bb7f..b74e2741f74f 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -561,7 +561,7 @@ int tls_device_sendpage(struct sock *sk, struct page *page,
{
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct iov_iter msg_iter;
- char *kaddr = kmap(page);
+ char *kaddr;
struct kvec iov;
int rc;
@@ -576,6 +576,7 @@ 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, &iov, 1, size);