systemd/0777-journal-remote-check-return-value-from-MHD_add_respo.patch

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From c20e06c1c0319e3759a11bf9051a8041898f79b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Sun, 7 Mar 2021 12:08:06 +0100
Subject: [PATCH] journal-remote: check return value from
MHD_add_response_header
Sadly, the API does not allow us to distinguish oom from invalid settings.
If the call fails, let's assume oom happened.
Coverity CID#1444714.
(cherry picked from commit 60d9c4f3b972ce70dfadc0a3f1a478a056c2ea7a)
Resolves: #2051981
---
src/journal-remote/journal-gatewayd.c | 22 ++++++++++++++++------
src/journal-remote/microhttpd-util.c | 3 ++-
2 files changed, 18 insertions(+), 7 deletions(-)
diff --git a/src/journal-remote/journal-gatewayd.c b/src/journal-remote/journal-gatewayd.c
index 3a167ab890..54446ff7b5 100644
--- a/src/journal-remote/journal-gatewayd.c
+++ b/src/journal-remote/journal-gatewayd.c
@@ -492,7 +492,9 @@ static int request_handler_entries(
if (!response)
return respond_oom(connection);
- MHD_add_response_header(response, "Content-Type", mime_types[m->mode]);
+ if (MHD_add_response_header(response, "Content-Type", mime_types[m->mode]) == MHD_NO)
+ return respond_oom(connection);
+
return MHD_queue_response(connection, MHD_HTTP_OK, response);
}
@@ -627,7 +629,9 @@ static int request_handler_fields(
if (!response)
return respond_oom(connection);
- MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]);
+ if (MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]) == MHD_NO)
+ return respond_oom(connection);
+
return MHD_queue_response(connection, MHD_HTTP_OK, response);
}
@@ -650,8 +654,10 @@ static int request_handler_redirect(
return respond_oom(connection);
}
- MHD_add_response_header(response, "Content-Type", "text/html");
- MHD_add_response_header(response, "Location", target);
+ if (MHD_add_response_header(response, "Content-Type", "text/html") == MHD_NO ||
+ MHD_add_response_header(response, "Location", target) == MHD_NO)
+ return respond_oom(connection);
+
return MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response);
}
@@ -680,7 +686,9 @@ static int request_handler_file(
return respond_oom(connection);
TAKE_FD(fd);
- MHD_add_response_header(response, "Content-Type", mime_type);
+ if (MHD_add_response_header(response, "Content-Type", mime_type) == MHD_NO)
+ return respond_oom(connection);
+
return MHD_queue_response(connection, MHD_HTTP_OK, response);
}
@@ -781,7 +789,9 @@ static int request_handler_machine(
return respond_oom(connection);
TAKE_PTR(json);
- MHD_add_response_header(response, "Content-Type", "application/json");
+ if (MHD_add_response_header(response, "Content-Type", "application/json") == MHD_NO)
+ return respond_oom(connection);
+
return MHD_queue_response(connection, MHD_HTTP_OK, response);
}
diff --git a/src/journal-remote/microhttpd-util.c b/src/journal-remote/microhttpd-util.c
index 2ae5172fe9..fdfeaeb2f5 100644
--- a/src/journal-remote/microhttpd-util.c
+++ b/src/journal-remote/microhttpd-util.c
@@ -40,7 +40,8 @@ static int mhd_respond_internal(struct MHD_Connection *connection,
return MHD_NO;
log_debug("Queueing response %u: %s", code, buffer);
- MHD_add_response_header(response, "Content-Type", "text/plain");
+ if (MHD_add_response_header(response, "Content-Type", "text/plain") == MHD_NO)
+ return MHD_NO;
return MHD_queue_response(connection, code, response);
}