Fix NULL ptr access in _gnutls_iov_iter_next()

Signed-off-by: Tim Rühsen <tim.ruehsen@gmx.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/iov.c b/lib/iov.c
index 1cd8d46dd7..d148ac97e4 100644
--- a/lib/iov.c
+++ b/lib/iov.c
@@ -77,6 +77,12 @@ _gnutls_iov_iter_next(struct iov_iter_st *iter, uint8_t **data)
 		size_t len = iov->iov_len;
 		size_t block_left;
 
+		if (!p) {
+			// skip NULL iov entries, else we run into issues below
+			iter->iov_index++;
+			continue;
+		}
+
 		if (unlikely(len < iter->iov_offset))
 			return gnutls_assert_val(GNUTLS_E_UNEXPECTED_PACKET_LENGTH);
 		len -= iter->iov_offset;