From 088a96ff15123ab361e7ef10ec9870ce63ee42db Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Tue, 19 May 2020 15:11:21 +0300
Subject: [PATCH] Add some checks.

GitOrigin-RevId: 6c24e7d3d48ed823a45d6b106855f3a0f55a0db5
---
 tdnet/td/net/HttpReader.cpp | 1 +
 tdnet/td/net/SslStream.cpp  | 2 ++
 tdutils/td/utils/Parser.h   | 2 +-
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/tdnet/td/net/HttpReader.cpp b/tdnet/td/net/HttpReader.cpp
index 83d806cc..a53f5a85 100644
--- a/tdnet/td/net/HttpReader.cpp
+++ b/tdnet/td/net/HttpReader.cpp
@@ -148,6 +148,7 @@ Result<size_t> HttpReader::read_next(HttpQuery *query) {
             end_p--;
           }
 
+          CHECK(p != nullptr);
           Slice boundary(p, static_cast<size_t>(end_p - p));
           if (boundary.empty() || boundary.size() > MAX_BOUNDARY_LENGTH) {
             return Status::Error(400, "Bad Request: boundary too big or empty");
diff --git a/tdnet/td/net/SslStream.cpp b/tdnet/td/net/SslStream.cpp
index f8cadb6c..dc4c7e9e 100644
--- a/tdnet/td/net/SslStream.cpp
+++ b/tdnet/td/net/SslStream.cpp
@@ -515,6 +515,7 @@ int strm_read(BIO *b, char *buf, int len) {
   auto *stream = static_cast<SslStreamImpl *>(BIO_get_data(b));
   CHECK(stream != nullptr);
   BIO_clear_retry_flags(b);
+  CHECK(buf != nullptr);
   int res = narrow_cast<int>(stream->flow_read(MutableSlice(buf, len)));
   if (res == 0) {
     BIO_set_retry_read(b);
@@ -526,6 +527,7 @@ int strm_write(BIO *b, const char *buf, int len) {
   auto *stream = static_cast<SslStreamImpl *>(BIO_get_data(b));
   CHECK(stream != nullptr);
   BIO_clear_retry_flags(b);
+  CHECK(buf != nullptr);
   return narrow_cast<int>(stream->flow_write(Slice(buf, len)));
 }
 }  // namespace
diff --git a/tdutils/td/utils/Parser.h b/tdutils/td/utils/Parser.h
index 245f4504..015bede5 100644
--- a/tdutils/td/utils/Parser.h
+++ b/tdutils/td/utils/Parser.h
@@ -45,7 +45,7 @@ class ParserImpl {
     return ptr_ == end_;
   }
   void clear() {
-    ptr_ = nullptr;
+    ptr_ = SliceT().begin();
     end_ = ptr_;
     status_ = Status::OK();
   }