Resolves: #1941925 - fix SIGSEGV upon disconnect of a ldaps:// transfer

This commit is contained in:
Kamil Dudka 2021-03-24 11:04:10 +01:00
parent 996e51f2d6
commit 41dba95570
2 changed files with 164 additions and 1 deletions

View File

@ -0,0 +1,156 @@
From 17686d25019489f43f3d5641db8683932857845e Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 15 Feb 2021 09:41:22 +0100
Subject: [PATCH 1/2] openldap: pass 'data' to the callbacks instead of 'conn'
Upstream-commit: a59c33ceffb8f78b71fa084bbc99c94ecfe82ce6
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/openldap.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/lib/openldap.c b/lib/openldap.c
index 4070bbf..d079822 100644
--- a/lib/openldap.c
+++ b/lib/openldap.c
@@ -278,7 +278,7 @@ static CURLcode ldap_connecting(struct Curl_easy *data, bool *done)
if(!li->sslinst) {
Sockbuf *sb;
ldap_get_option(li->ld, LDAP_OPT_SOCKBUF, &sb);
- ber_sockbuf_add_io(sb, &ldapsb_tls, LBER_SBIOD_LEVEL_TRANSPORT, conn);
+ ber_sockbuf_add_io(sb, &ldapsb_tls, LBER_SBIOD_LEVEL_TRANSPORT, data);
li->sslinst = TRUE;
li->recv = conn->recv[FIRSTSOCKET];
li->send = conn->send[FIRSTSOCKET];
@@ -716,8 +716,8 @@ ldapsb_tls_ctrl(Sockbuf_IO_Desc *sbiod, int opt, void *arg)
{
(void)arg;
if(opt == LBER_SB_OPT_DATA_READY) {
- struct connectdata *conn = sbiod->sbiod_pvt;
- return Curl_ssl_data_pending(conn, FIRSTSOCKET);
+ struct Curl_easy *data = sbiod->sbiod_pvt;
+ return Curl_ssl_data_pending(data->conn, FIRSTSOCKET);
}
return 0;
}
@@ -725,12 +725,13 @@ ldapsb_tls_ctrl(Sockbuf_IO_Desc *sbiod, int opt, void *arg)
static ber_slen_t
ldapsb_tls_read(Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
- struct connectdata *conn = sbiod->sbiod_pvt;
+ struct Curl_easy *data = sbiod->sbiod_pvt;
+ struct connectdata *conn = data->conn;
struct ldapconninfo *li = conn->proto.ldapc;
ber_slen_t ret;
CURLcode err = CURLE_RECV_ERROR;
- ret = (li->recv)(conn->data, FIRSTSOCKET, buf, len, &err);
+ ret = (li->recv)(data, FIRSTSOCKET, buf, len, &err);
if(ret < 0 && err == CURLE_AGAIN) {
SET_SOCKERRNO(EWOULDBLOCK);
}
@@ -740,12 +741,13 @@ ldapsb_tls_read(Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
static ber_slen_t
ldapsb_tls_write(Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
- struct connectdata *conn = sbiod->sbiod_pvt;
+ struct Curl_easy *data = sbiod->sbiod_pvt;
+ struct connectdata *conn = data->conn;
struct ldapconninfo *li = conn->proto.ldapc;
ber_slen_t ret;
CURLcode err = CURLE_SEND_ERROR;
- ret = (li->send)(conn->data, FIRSTSOCKET, buf, len, &err);
+ ret = (li->send)(data, FIRSTSOCKET, buf, len, &err);
if(ret < 0 && err == CURLE_AGAIN) {
SET_SOCKERRNO(EWOULDBLOCK);
}
--
2.26.3
From a1c1f175e44ef95c47b1e2e91424e193ee7a0d0b Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Tue, 23 Mar 2021 09:28:07 +0100
Subject: [PATCH 2/2] openldap: avoid NULL pointer dereferences
Follow-up to a59c33ceffb8f78
Reported-by: Patrick Monnerat
Fixes #6676
Closes #6780
Upstream-commit: e467ea3bd937f38e1d2e070a68ed451303ba1e73
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/openldap.c | 40 +++++++++++++++++++++++++---------------
1 file changed, 25 insertions(+), 15 deletions(-)
diff --git a/lib/openldap.c b/lib/openldap.c
index d079822..066c0fd 100644
--- a/lib/openldap.c
+++ b/lib/openldap.c
@@ -369,6 +369,9 @@ static CURLcode ldap_disconnect(struct Curl_easy *data,
if(li) {
if(li->ld) {
+ Sockbuf *sb;
+ ldap_get_option(li->ld, LDAP_OPT_SOCKBUF, &sb);
+ ber_sockbuf_add_io(sb, &ldapsb_tls, LBER_SBIOD_LEVEL_TRANSPORT, NULL);
ldap_unbind_ext(li->ld, NULL, NULL);
li->ld = NULL;
}
@@ -726,14 +729,18 @@ static ber_slen_t
ldapsb_tls_read(Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct Curl_easy *data = sbiod->sbiod_pvt;
- struct connectdata *conn = data->conn;
- struct ldapconninfo *li = conn->proto.ldapc;
- ber_slen_t ret;
- CURLcode err = CURLE_RECV_ERROR;
+ ber_slen_t ret = 0;
+ if(data) {
+ struct connectdata *conn = data->conn;
+ if(conn) {
+ struct ldapconninfo *li = conn->proto.ldapc;
+ CURLcode err = CURLE_RECV_ERROR;
- ret = (li->recv)(data, FIRSTSOCKET, buf, len, &err);
- if(ret < 0 && err == CURLE_AGAIN) {
- SET_SOCKERRNO(EWOULDBLOCK);
+ ret = (li->recv)(data, FIRSTSOCKET, buf, len, &err);
+ if(ret < 0 && err == CURLE_AGAIN) {
+ SET_SOCKERRNO(EWOULDBLOCK);
+ }
+ }
}
return ret;
}
@@ -742,14 +749,17 @@ static ber_slen_t
ldapsb_tls_write(Sockbuf_IO_Desc *sbiod, void *buf, ber_len_t len)
{
struct Curl_easy *data = sbiod->sbiod_pvt;
- struct connectdata *conn = data->conn;
- struct ldapconninfo *li = conn->proto.ldapc;
- ber_slen_t ret;
- CURLcode err = CURLE_SEND_ERROR;
-
- ret = (li->send)(data, FIRSTSOCKET, buf, len, &err);
- if(ret < 0 && err == CURLE_AGAIN) {
- SET_SOCKERRNO(EWOULDBLOCK);
+ ber_slen_t ret = 0;
+ if(data) {
+ struct connectdata *conn = data->conn;
+ if(conn) {
+ struct ldapconninfo *li = conn->proto.ldapc;
+ CURLcode err = CURLE_SEND_ERROR;
+ ret = (li->send)(data, FIRSTSOCKET, buf, len, &err);
+ if(ret < 0 && err == CURLE_AGAIN) {
+ SET_SOCKERRNO(EWOULDBLOCK);
+ }
+ }
}
return ret;
}
--
2.26.3

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@ -1,10 +1,13 @@
Summary: A utility for getting files from remote servers (FTP, HTTP, and others) Summary: A utility for getting files from remote servers (FTP, HTTP, and others)
Name: curl Name: curl
Version: 7.75.0 Version: 7.75.0
Release: 2%{?dist} Release: 3%{?dist}
License: MIT License: MIT
Source: https://curl.se/download/%{name}-%{version}.tar.xz Source: https://curl.se/download/%{name}-%{version}.tar.xz
# fix SIGSEGV upon disconnect of a ldaps:// transfer (#1941925)
Patch1: 0001-curl-7.75.0-ldaps-segv.patch
# patch making libcurl multilib ready # patch making libcurl multilib ready
Patch101: 0101-curl-7.32.0-multilib.patch Patch101: 0101-curl-7.32.0-multilib.patch
@ -183,6 +186,7 @@ be installed.
%setup -q %setup -q
# upstream patches # upstream patches
%patch1 -p1
# Fedora patches # Fedora patches
%patch101 -p1 %patch101 -p1
@ -355,6 +359,9 @@ rm -f ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la
%{_libdir}/libcurl.so.4.[0-9].[0-9].minimal %{_libdir}/libcurl.so.4.[0-9].[0-9].minimal
%changelog %changelog
* Wed Mar 24 2021 Kamil Dudka <kdudka@redhat.com> - 7.75.0-3
- fix SIGSEGV upon disconnect of a ldaps:// transfer (#1941925)
* Tue Feb 23 2021 Kamil Dudka <kdudka@redhat.com> - 7.75.0-2 * Tue Feb 23 2021 Kamil Dudka <kdudka@redhat.com> - 7.75.0-2
- build-require python3-impacket only on Fedora - build-require python3-impacket only on Fedora