devel/qt6-base: Address CVE-2023-51714

A potential integer overflow has been discovered in Qt's HTTP2
implementation. If the HTTP2 implementation receives more then 4GiB
in total headers, or more than 2GiB for any given header pair, then
the internal buffers may overflow.

Reported by:	vvd via #freebsd-desktop
MFH:		2024Q1
Security:	e2f981f1-ad9e-11ee-8b55-4ccc6adda413

devel/qt6-base/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	base
 DISTVERSION=	${QT6_VERSION}
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	devel
 PKGNAMEPREFIX=	qt6-
 

devel/qt6-base/files/patch-security-rollup

@@ -0,0 +1,145 @@
+From 13c16b756900fe524f6d9534e8a07aa003c05e0c Mon Sep 17 00:00:00 2001
+From: Marc Mutz <marc.mutz@qt.io>
+Date: Tue, 12 Dec 2023 20:51:56 +0100
+Subject: [PATCH] HPack: fix a Yoda Condition
+
+Putting the variable on the LHS of a relational operation makes the
+expression easier to read. In this case, we find that the whole
+expression is nonsensical as an overflow protection, because if
+name.size() + value.size() overflows, the result will exactly _not_
+be > max() - 32, because UB will have happened.
+
+To be fixed in a follow-up commit.
+
+As a drive-by, add parentheses around the RHS.
+
+Pick-to: 6.5 6.2 5.15
+Change-Id: I35ce598884c37c51b74756b3bd2734b9aad63c09
+Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
+(cherry picked from commit 658607a34ead214fbacbc2cca44915655c318ea9)
+Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
+(cherry picked from commit 4f7efd41740107f90960116700e3134f5e433867)
+---
+ src/network/access/http2/hpacktable.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/network/access/http2/hpacktable.cpp b/src/network/access/http2/hpacktable.cpp
+index 74a09a207ff..c8c5d098c80 100644
+--- src/network/access/http2/hpacktable.cpp.orig
++++ src/network/access/http2/hpacktable.cpp
+@@ -27,7 +27,7 @@ HeaderSize entry_size(QByteArrayView name, QByteArrayView value)
+     // 32 octets of overhead."
+
+     const unsigned sum = unsigned(name.size() + value.size());
+-    if (std::numeric_limits<unsigned>::max() - 32 < sum)
++    if (sum > (std::numeric_limits<unsigned>::max() - 32))
+         return HeaderSize();
+     return HeaderSize(true, quint32(sum + 32));
+ }
+From 811b9eef6d08d929af8708adbf2a5effb0eb62d7 Mon Sep 17 00:00:00 2001
+From: Marc Mutz <marc.mutz@qt.io>
+Date: Tue, 12 Dec 2023 22:08:07 +0100
+Subject: [PATCH] HPack: fix incorrect integer overflow check
+
+This code never worked:
+
+For the comparison with max() - 32 to trigger, on 32-bit platforms (or
+Qt 5) signed interger overflow would have had to happen in the
+addition of the two sizes. The compiler can therefore remove the
+overflow check as dead code.
+
+On Qt 6 and 64-bit platforms, the signed integer addition would be
+very unlikely to overflow, but the following truncation to uint32
+would yield the correct result only in a narrow 32-value window just
+below UINT_MAX, if even that.
+
+Fix by using the proper tool, qAddOverflow.
+
+Pick-to: 6.5 6.2 5.15
+Change-Id: I7599f2e75ff7f488077b0c60b81022591005661c
+Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
+(cherry picked from commit ee5da1f2eaf8932aeca02ffea6e4c618585e29e3)
+Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
+(cherry picked from commit debeb8878da2dc706ead04b6072ecbe7e5313860)
+Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
+Reviewed-by: Marc Mutz <marc.mutz@qt.io>
+---
+ src/network/access/http2/hpacktable.cpp | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/src/network/access/http2/hpacktable.cpp b/src/network/access/http2/hpacktable.cpp
+index c8c5d098c80..2c728b37e3b 100644
+--- src/network/access/http2/hpacktable.cpp.orig
++++ src/network/access/http2/hpacktable.cpp
+@@ -26,7 +26,9 @@ HeaderSize entry_size(QByteArrayView name, QByteArrayView value)
+     // for counting the number of references to the name and value would have
+     // 32 octets of overhead."
+
+-    const unsigned sum = unsigned(name.size() + value.size());
++    size_t sum;
++    if (qAddOverflow(size_t(name.size()), size_t(value.size()), &sum))
++        return HeaderSize();
+     if (sum > (std::numeric_limits<unsigned>::max() - 32))
+         return HeaderSize();
+     return HeaderSize(true, quint32(sum + 32));
+From 2e50fbc30a61d69cc2caf6fbd8aca29aa6b8db86 Mon Sep 17 00:00:00 2001
+From: Marc Mutz <marc.mutz@qt.io>
+Date: Tue, 19 Dec 2023 14:22:37 +0100
+Subject: [PATCH] Http2: fix potential overflow in assemble_hpack_block()
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+The function is given a vector of Http2::Frame's and flattens it into
+a vector<uchar>. While each Frame can contain a maximum of 16GiB of
+data (24-bit size field), one "only" needs 257 of them to overflow the
+quint32 variable's range.
+
+So make sure any overflow does not go undetected.
+
+Keep the limited uint32_t range for now, as we don't know whether all
+consumers of the result can deal with more than 4GiB of data.
+
+Since all these frames must be in memory, this cannot overflow in
+practice on 32-bit machines.
+
+Pick-to: 6.5 6.2 5.15
+Change-Id: Iafaa7d1c870cba9100e75065db11d95934f86213
+Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
+(cherry picked from commit 1e6bb61af3ae29755f93b92f157df026f934ae61)
+Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
+(cherry picked from commit af8a9874c32c6b1af8998be9487170b6269dbe1f)
+---
+ src/network/access/qhttp2protocolhandler.cpp | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/src/network/access/qhttp2protocolhandler.cpp b/src/network/access/qhttp2protocolhandler.cpp
+index 88963f89687..707ef8de54e 100644
+--- src/network/access/qhttp2protocolhandler.cpp.orig
++++ src/network/access/qhttp2protocolhandler.cpp
+@@ -10,10 +10,12 @@
+ #include <private/qnoncontiguousbytedevice_p.h>
+
+ #include <QtNetwork/qabstractsocket.h>
++
+ #include <QtCore/qloggingcategory.h>
+ #include <QtCore/qendian.h>
+ #include <QtCore/qdebug.h>
+ #include <QtCore/qlist.h>
++#include <QtCore/qnumeric.h>
+ #include <QtCore/qurl.h>
+
+ #include <qhttp2configuration.h>
+@@ -90,8 +92,10 @@ std::vector<uchar> assemble_hpack_block(const std::vector<Http2::Frame> &frames)
+     std::vector<uchar> hpackBlock;
+
+     quint32 total = 0;
+-    for (const auto &frame : frames)
+-        total += frame.hpackBlockSize();
++    for (const auto &frame : frames) {
++        if (qAddOverflow(total, frame.hpackBlockSize(), &total))
++            return hpackBlock;
++    }
+
+     if (!total)
+         return hpackBlock;