From 2298247c4e1b86cab8327c43035c64389318d967 Mon Sep 17 00:00:00 2001 From: Vakul Garg Date: Thu, 2 Aug 2018 20:43:10 +0530 Subject: [PATCH] net/tls: Mark the end in scatterlist table 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 Acked-by: Dave Watson Signed-off-by: David S. Miller --- 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 ff3a6904a722f..83d67df33f0cf 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); -- 2.39.5