112 lines
4.1 KiB
Diff
112 lines
4.1 KiB
Diff
From 2f8154c11e2cc139067973e47f1ffe5a302fb89d Mon Sep 17 00:00:00 2001
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From: Kamil Dudka <kdudka@redhat.com>
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Date: Thu, 30 Jul 2015 12:01:20 +0200
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Subject: [PATCH] http: move HTTP/2 cleanup code off http_disconnect()
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Otherwise it would never be called for an HTTP/2 connection, which has
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its own disconnect handler.
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I spotted this while debugging <https://bugzilla.redhat.com/1248389>
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where the http_disconnect() handler was called on an FTP session handle
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causing 'dnf' to crash. conn->data->req.protop of type (struct FTP *)
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was reinterpreted as type (struct HTTP *) which resulted in SIGSEGV in
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Curl_add_buffer_free() after printing the "Connection cache is full,
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closing the oldest one." message.
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A previously working version of libcurl started to crash after it was
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recompiled with the HTTP/2 support despite the HTTP/2 protocol was not
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actually used. This commit makes it work again although I suspect the
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root cause (reinterpreting session handle data of incompatible protocol)
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still has to be fixed. Otherwise the same will happen when mixing FTP
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and HTTP/2 connections and exceeding the connection cache limit.
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Reported-by: Tomas Tomecek
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Bug: https://bugzilla.redhat.com/1248389
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Upstream-commit: f7dcc7c11817f6eaee61b1cd84ffc1b2b1fcac43
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Signed-off-by: Kamil Dudka <kdudka@redhat.com>
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---
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lib/http.c | 25 ++-----------------------
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lib/http2.c | 11 +++++++++++
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2 files changed, 13 insertions(+), 23 deletions(-)
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diff --git a/lib/http.c b/lib/http.c
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index a1eef81..8d5b9a4 100644
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--- a/lib/http.c
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+++ b/lib/http.c
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@@ -86,7 +86,6 @@
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* Forward declarations.
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*/
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-static CURLcode http_disconnect(struct connectdata *conn, bool dead);
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static int http_getsock_do(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks);
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@@ -117,7 +116,7 @@ const struct Curl_handler Curl_handler_http = {
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http_getsock_do, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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- http_disconnect, /* disconnect */
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+ ZERO_NULL, /* disconnect */
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ZERO_NULL, /* readwrite */
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PORT_HTTP, /* defport */
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CURLPROTO_HTTP, /* protocol */
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@@ -141,7 +140,7 @@ const struct Curl_handler Curl_handler_https = {
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http_getsock_do, /* doing_getsock */
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ZERO_NULL, /* domore_getsock */
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ZERO_NULL, /* perform_getsock */
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- http_disconnect, /* disconnect */
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+ ZERO_NULL, /* disconnect */
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ZERO_NULL, /* readwrite */
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PORT_HTTPS, /* defport */
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CURLPROTO_HTTPS, /* protocol */
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@@ -168,21 +167,6 @@ CURLcode Curl_http_setup_conn(struct connectdata *conn)
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return CURLE_OK;
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}
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-static CURLcode http_disconnect(struct connectdata *conn, bool dead_connection)
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-{
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-#ifdef USE_NGHTTP2
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- struct HTTP *http = conn->data->req.protop;
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- if(http) {
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- Curl_add_buffer_free(http->header_recvbuf);
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- http->header_recvbuf = NULL; /* clear the pointer */
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- }
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-#else
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- (void)conn;
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-#endif
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- (void)dead_connection;
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- return CURLE_OK;
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-}
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-
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/*
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* checkheaders() checks the linked list of custom HTTP headers for a
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* particular header (prefix).
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diff --git a/lib/http2.c b/lib/http2.c
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index 1a2c486..eec0c9f 100644
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--- a/lib/http2.c
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+++ b/lib/http2.c
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@@ -79,6 +79,7 @@ static int http2_getsock(struct connectdata *conn,
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static CURLcode http2_disconnect(struct connectdata *conn,
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bool dead_connection)
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{
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+ struct HTTP *http = conn->data->req.protop;
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struct http_conn *c = &conn->proto.httpc;
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(void)dead_connection;
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@@ -88,6 +89,11 @@ static CURLcode http2_disconnect(struct connectdata *conn,
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Curl_safefree(c->inbuf);
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Curl_hash_destroy(&c->streamsh);
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+ if(http) {
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+ Curl_add_buffer_free(http->header_recvbuf);
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+ http->header_recvbuf = NULL; /* clear the pointer */
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+ }
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+
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DEBUGF(infof(conn->data, "HTTP/2 DISCONNECT done\n"));
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return CURLE_OK;
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--
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2.4.6
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