[PATCH net-next] net/tls: Mark the end in scatterlist table

[Vakul Garg]

Function zerocopy_from_iter() unmarks the 'end' in input sgtable while
adding new entries in it. The last entry in sgtable remained unmarked.
This results in KASAN error report on using apis like sg_nents(). Before
returning, the function needs to mark the 'end' in the last entry it
adds.

Signed-off-by: Vakul Garg <vakul.g...@nxp.com>
---
 net/tls/tls_sw.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index ff3a6904a722..83d67df33f0c 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -311,6 +311,9 @@ static int zerocopy_from_iter(struct sock *sk, struct 
iov_iter *from,
                }
        }
 
+       /* Mark the end in the last sg entry if newly added */
+       if (num_elem > *pages_used)
+               sg_mark_end(&to[num_elem - 1]);
 out:
        if (rc)
                iov_iter_revert(from, size - *size_used);
-- 
2.13.6