From: Daniel Stenberg <daniel@haxx.se>
Date: Fri, 4 May 2018 09:06:26 +0000 (+0200)
Subject: http: don't set the "rewind" flag when not uploading anything
X-Git-Tag: curl-7_60_0~31
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=e9d9d1af8a512d4b4ed500308247766524b21763;p=thirdparty%2Fcurl.git

http: don't set the "rewind" flag when not uploading anything

It triggers an assert.

Detected by OSS-Fuzz
Bug: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=8144
Closes #2546
---

diff --git a/lib/http.c b/lib/http.c
index ec709ff8d3..1a313b4fbe 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -433,7 +433,7 @@ static CURLcode http_perhapsrewind(struct connectdata *conn)
            data left to send, keep on sending. */
 
         /* rewind data when completely done sending! */
-        if(!conn->bits.authneg) {
+        if(!conn->bits.authneg && (conn->writesockfd != CURL_SOCKET_BAD)) {
           conn->bits.rewindaftersend = TRUE;
           infof(data, "Rewind stream after send\n");
         }