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Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/0001-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch')
-rw-r--r--meta/recipes-devtools/qemu/qemu/0001-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch217
1 files changed, 217 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/0001-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch b/meta/recipes-devtools/qemu/qemu/0001-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch
new file mode 100644
index 0000000000..ac51cf567a
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/0001-hw-display-qxl-Pass-requested-buffer-size-to-qxl_phy.patch
@@ -0,0 +1,217 @@
+Upstream-Status: Backport [https://github.com/qemu/qemu/commit/8efec0e]
+
+Backport and rebase patch to fix compile error which imported by CVE-2022-4144.patch:
+
+../qemu-6.2.0/hw/display/qxl.c: In function 'qxl_phys2virt':
+../qemu-6.2.0/hw/display/qxl.c:1477:67: error: 'size' undeclared (first use in this function); did you mean 'gsize'?
+ 1477 | if (!qxl_get_check_slot_offset(qxl, pqxl, &slot, &offset, size)) {
+ | ^~~~
+ | gsize
+../qemu-6.2.0/hw/display/qxl.c:1477:67: note: each undeclared identifier is reported only once for each function it appears in
+
+Signed-off-by: Kai Kang <kai.kang@windriver.com>
+
+From 8efec0ef8bbc1e75a7ebf6e325a35806ece9b39f Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@linaro.org>
+Date: Mon, 28 Nov 2022 21:27:39 +0100
+Subject: [PATCH] hw/display/qxl: Pass requested buffer size to qxl_phys2virt()
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Currently qxl_phys2virt() doesn't check for buffer overrun.
+In order to do so in the next commit, pass the buffer size
+as argument.
+
+For QXLCursor in qxl_render_cursor() -> qxl_cursor() we
+verify the size of the chunked data ahead, checking we can
+access 'sizeof(QXLCursor) + chunk->data_size' bytes.
+Since in the SPICE_CURSOR_TYPE_MONO case the cursor is
+assumed to fit in one chunk, no change are required.
+In SPICE_CURSOR_TYPE_ALPHA the ahead read is handled in
+qxl_unpack_chunks().
+
+Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
+Acked-by: Gerd Hoffmann <kraxel@redhat.com>
+Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
+Message-Id: <20221128202741.4945-4-philmd@linaro.org>
+---
+ hw/display/qxl-logger.c | 11 ++++++++---
+ hw/display/qxl-render.c | 20 ++++++++++++++++----
+ hw/display/qxl.c | 14 +++++++++-----
+ hw/display/qxl.h | 3 ++-
+ 4 files changed, 35 insertions(+), 13 deletions(-)
+
+diff --git a/hw/display/qxl-logger.c b/hw/display/qxl-logger.c
+index 1bcf803..35c38f6 100644
+--- a/hw/display/qxl-logger.c
++++ b/hw/display/qxl-logger.c
+@@ -106,7 +106,7 @@ static int qxl_log_image(PCIQXLDevice *qxl, QXLPHYSICAL addr, int group_id)
+ QXLImage *image;
+ QXLImageDescriptor *desc;
+
+- image = qxl_phys2virt(qxl, addr, group_id);
++ image = qxl_phys2virt(qxl, addr, group_id, sizeof(QXLImage));
+ if (!image) {
+ return 1;
+ }
+@@ -214,7 +214,8 @@ int qxl_log_cmd_cursor(PCIQXLDevice *qxl, QXLCursorCmd *cmd, int group_id)
+ cmd->u.set.position.y,
+ cmd->u.set.visible ? "yes" : "no",
+ cmd->u.set.shape);
+- cursor = qxl_phys2virt(qxl, cmd->u.set.shape, group_id);
++ cursor = qxl_phys2virt(qxl, cmd->u.set.shape, group_id,
++ sizeof(QXLCursor));
+ if (!cursor) {
+ return 1;
+ }
+@@ -236,6 +237,7 @@ int qxl_log_command(PCIQXLDevice *qxl, const char *ring, QXLCommandExt *ext)
+ {
+ bool compat = ext->flags & QXL_COMMAND_FLAG_COMPAT;
+ void *data;
++ size_t datasz;
+ int ret;
+
+ if (!qxl->cmdlog) {
+@@ -249,15 +251,18 @@ int qxl_log_command(PCIQXLDevice *qxl, const char *ring, QXLCommandExt *ext)
+
+ switch (ext->cmd.type) {
+ case QXL_CMD_DRAW:
++ datasz = compat ? sizeof(QXLCompatDrawable) : sizeof(QXLDrawable);
+ break;
+ case QXL_CMD_SURFACE:
++ datasz = sizeof(QXLSurfaceCmd);
+ break;
+ case QXL_CMD_CURSOR:
++ datasz = sizeof(QXLCursorCmd);
+ break;
+ default:
+ goto out;
+ }
+- data = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
++ data = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id, datasz);
+ if (!data) {
+ return 1;
+ }
+diff --git a/hw/display/qxl-render.c b/hw/display/qxl-render.c
+index ca21700..fcfd40c 100644
+--- a/hw/display/qxl-render.c
++++ b/hw/display/qxl-render.c
+@@ -107,7 +107,9 @@ static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
+ qxl->guest_primary.resized = 0;
+ qxl->guest_primary.data = qxl_phys2virt(qxl,
+ qxl->guest_primary.surface.mem,
+- MEMSLOT_GROUP_GUEST);
++ MEMSLOT_GROUP_GUEST,
++ qxl->guest_primary.abs_stride
++ * height);
+ if (!qxl->guest_primary.data) {
+ goto end;
+ }
+@@ -228,7 +230,8 @@ static void qxl_unpack_chunks(void *dest, size_t size, PCIQXLDevice *qxl,
+ if (offset == size) {
+ return;
+ }
+- chunk = qxl_phys2virt(qxl, chunk->next_chunk, group_id);
++ chunk = qxl_phys2virt(qxl, chunk->next_chunk, group_id,
++ sizeof(QXLDataChunk) + chunk->data_size);
+ if (!chunk) {
+ return;
+ }
+@@ -295,7 +298,8 @@ fail:
+ /* called from spice server thread context only */
+ int qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext)
+ {
+- QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
++ QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id,
++ sizeof(QXLCursorCmd));
+ QXLCursor *cursor;
+ QEMUCursor *c;
+
+@@ -314,7 +318,15 @@ int qxl_render_cursor(PCIQXLDevice *qxl, QXLCommandExt *ext)
+ }
+ switch (cmd->type) {
+ case QXL_CURSOR_SET:
+- cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id);
++ /* First read the QXLCursor to get QXLDataChunk::data_size ... */
++ cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id,
++ sizeof(QXLCursor));
++ if (!cursor) {
++ return 1;
++ }
++ /* Then read including the chunked data following QXLCursor. */
++ cursor = qxl_phys2virt(qxl, cmd->u.set.shape, ext->group_id,
++ sizeof(QXLCursor) + cursor->chunk.data_size);
+ if (!cursor) {
+ return 1;
+ }
+diff --git a/hw/display/qxl.c b/hw/display/qxl.c
+index ae8aa07..2a4b2d4 100644
+--- a/hw/display/qxl.c
++++ b/hw/display/qxl.c
+@@ -274,7 +274,8 @@ static void qxl_spice_monitors_config_async(PCIQXLDevice *qxl, int replay)
+ QXL_IO_MONITORS_CONFIG_ASYNC));
+ }
+
+- cfg = qxl_phys2virt(qxl, qxl->guest_monitors_config, MEMSLOT_GROUP_GUEST);
++ cfg = qxl_phys2virt(qxl, qxl->guest_monitors_config, MEMSLOT_GROUP_GUEST,
++ sizeof(QXLMonitorsConfig));
+ if (cfg != NULL && cfg->count == 1) {
+ qxl->guest_primary.resized = 1;
+ qxl->guest_head0_width = cfg->heads[0].width;
+@@ -459,7 +460,8 @@ static int qxl_track_command(PCIQXLDevice *qxl, struct QXLCommandExt *ext)
+ switch (le32_to_cpu(ext->cmd.type)) {
+ case QXL_CMD_SURFACE:
+ {
+- QXLSurfaceCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
++ QXLSurfaceCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id,
++ sizeof(QXLSurfaceCmd));
+
+ if (!cmd) {
+ return 1;
+@@ -494,7 +496,8 @@ static int qxl_track_command(PCIQXLDevice *qxl, struct QXLCommandExt *ext)
+ }
+ case QXL_CMD_CURSOR:
+ {
+- QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
++ QXLCursorCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id,
++ sizeof(QXLCursorCmd));
+
+ if (!cmd) {
+ return 1;
+@@ -1463,7 +1466,8 @@ static bool qxl_get_check_slot_offset(PCIQXLDevice *qxl, QXLPHYSICAL pqxl,
+ }
+
+ /* can be also called from spice server thread context */
+-void *qxl_phys2virt(PCIQXLDevice *qxl, QXLPHYSICAL pqxl, int group_id)
++void *qxl_phys2virt(PCIQXLDevice *qxl, QXLPHYSICAL pqxl, int group_id,
++ size_t size)
+ {
+ uint64_t offset;
+ uint32_t slot;
+@@ -1971,7 +1975,7 @@ static void qxl_dirty_surfaces(PCIQXLDevice *qxl)
+ }
+
+ cmd = qxl_phys2virt(qxl, qxl->guest_surfaces.cmds[i],
+- MEMSLOT_GROUP_GUEST);
++ MEMSLOT_GROUP_GUEST, sizeof(QXLSurfaceCmd));
+ assert(cmd);
+ assert(cmd->type == QXL_SURFACE_CMD_CREATE);
+ qxl_dirty_one_surface(qxl, cmd->u.surface_create.data,
+diff --git a/hw/display/qxl.h b/hw/display/qxl.h
+index 30d21f4..4551c23 100644
+--- a/hw/display/qxl.h
++++ b/hw/display/qxl.h
+@@ -147,7 +147,8 @@ OBJECT_DECLARE_SIMPLE_TYPE(PCIQXLDevice, PCI_QXL)
+ #define QXL_DEFAULT_REVISION (QXL_REVISION_STABLE_V12 + 1)
+
+ /* qxl.c */
+-void *qxl_phys2virt(PCIQXLDevice *qxl, QXLPHYSICAL phys, int group_id);
++void *qxl_phys2virt(PCIQXLDevice *qxl, QXLPHYSICAL phys, int group_id,
++ size_t size);
+ void qxl_set_guest_bug(PCIQXLDevice *qxl, const char *msg, ...)
+ GCC_FMT_ATTR(2, 3);
+
+--
+2.34.1
+
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-04 10:41:02 +0000