From 9ea7d3bcedda3d82f03eb15844cce97f2558539a Mon Sep 17 00:00:00 2001
From: Zhen-Huan HWANG <44398524+zhwang-amad@users.noreply.github.com>
Date: Thu, 11 Apr 2019 19:17:18 +0200
Subject: [PATCH] sftp.c : discard and reset oversized packet in
 sftp_packet_read() (#269)

file : sftp.c

notes : when sftp_packet_read() encounters an sftp packet which exceeds SFTP max packet size it now resets the reading state so it can continue reading.

credit : Zhen-Huan HWANG
---
 src/sftp.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/sftp.c b/src/sftp.c
index 668bdd47..245f1347 100644
--- a/src/sftp.c
+++ b/src/sftp.c
@@ -346,10 +346,14 @@ sftp_packet_read(LIBSSH2_SFTP *sftp)
             sftp->partial_len = _libssh2_ntohu32(sftp->partial_size);
             /* make sure we don't proceed if the packet size is unreasonably
                large */
-            if(sftp->partial_len > LIBSSH2_SFTP_PACKET_MAXLEN)
+            if(sftp->partial_len > LIBSSH2_SFTP_PACKET_MAXLEN) {
+                libssh2_channel_flush(channel);
+                sftp->partial_size_len = 0;
                 return _libssh2_error(session,
                                       LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED,
                                       "SFTP packet too large");
+            }
+
             if(sftp->partial_len == 0)
                 return _libssh2_error(session,
                                       LIBSSH2_ERROR_ALLOC,