yeahuh / rpms / qemu-kvm

Forked from rpms/qemu-kvm 2 years ago
Clone

Blame SOURCES/kvm-slirp-ensure-there-is-enough-space-in-mbuf-to-null-t.patch

9ae3a8
From e80c12dfdbde349dcd225771a4801b47be0b3b5f Mon Sep 17 00:00:00 2001
9ae3a8
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com>
9ae3a8
Date: Mon, 20 May 2019 16:43:14 +0200
9ae3a8
Subject: [PATCH 3/4] slirp: ensure there is enough space in mbuf to
9ae3a8
 null-terminate
9ae3a8
MIME-Version: 1.0
9ae3a8
Content-Type: text/plain; charset=UTF-8
9ae3a8
Content-Transfer-Encoding: 8bit
9ae3a8
9ae3a8
RH-Author: Marc-André Lureau <marcandre.lureau@redhat.com>
9ae3a8
Message-id: <20190520164315.22140-3-marcandre.lureau@redhat.com>
9ae3a8
Patchwork-id: 88094
9ae3a8
O-Subject: [RHEL-7.7 qemu-kvm PATCH 2/3] slirp: ensure there is enough space in mbuf to null-terminate
9ae3a8
Bugzilla: 1669068
9ae3a8
RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
9ae3a8
RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
9ae3a8
RH-Acked-by: Thomas Huth <thuth@redhat.com>
9ae3a8
9ae3a8
Prevents from buffer overflows.
9ae3a8
Related to: https://bugzilla.redhat.com/show_bug.cgi?id=1664205
9ae3a8
9ae3a8
Cc: Prasad J Pandit <pjp@fedoraproject.org>
9ae3a8
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
9ae3a8
9ae3a8
(cherry picked from libslirp commit
9ae3a8
306fef58b54d793ba4b259728c21322765bda917)
9ae3a8
9ae3a8
[ MA - backported with style conflicts fixes ]
9ae3a8
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
9ae3a8
9ae3a8
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
9ae3a8
---
9ae3a8
 slirp/tcp_subr.c | 3 +++
9ae3a8
 1 file changed, 3 insertions(+)
9ae3a8
9ae3a8
diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c
9ae3a8
index 80538a9..578b204 100644
9ae3a8
--- a/slirp/tcp_subr.c
9ae3a8
+++ b/slirp/tcp_subr.c
9ae3a8
@@ -586,6 +586,7 @@ tcp_emu(struct socket *so, struct mbuf *m)
9ae3a8
 			memcpy(so_rcv->sb_wptr, m->m_data, m->m_len);
9ae3a8
 			so_rcv->sb_wptr += m->m_len;
9ae3a8
 			so_rcv->sb_rptr += m->m_len;
9ae3a8
+			m_inc(m, m->m_len + 1);
9ae3a8
 			m->m_data[m->m_len] = 0; /* NULL terminate */
9ae3a8
 			if (strchr(m->m_data, '\r') || strchr(m->m_data, '\n')) {
9ae3a8
 				if (sscanf(so_rcv->sb_data, "%u%*[ ,]%u", &n1, &n2) == 2) {
9ae3a8
@@ -619,6 +620,7 @@ tcp_emu(struct socket *so, struct mbuf *m)
9ae3a8
 		}
9ae3a8
 
9ae3a8
         case EMU_FTP: /* ftp */
9ae3a8
+		m_inc(m, m->m_len + 1);
9ae3a8
                 *(m->m_data+m->m_len) = 0; /* NUL terminate for strstr */
9ae3a8
 		if ((bptr = (char *)strstr(m->m_data, "ORT")) != NULL) {
9ae3a8
 			/*
9ae3a8
@@ -716,6 +718,7 @@ tcp_emu(struct socket *so, struct mbuf *m)
9ae3a8
 		/*
9ae3a8
 		 * Need to emulate DCC CHAT, DCC SEND and DCC MOVE
9ae3a8
 		 */
9ae3a8
+		m_inc(m, m->m_len + 1);
9ae3a8
 		*(m->m_data+m->m_len) = 0; /* NULL terminate the string for strstr */
9ae3a8
 		if ((bptr = (char *)strstr(m->m_data, "DCC")) == NULL)
9ae3a8
 			 return 1;
9ae3a8
-- 
9ae3a8
1.8.3.1
9ae3a8