File 0250-hw-display-qxl-Have-qxl_log_command.patch of Package qemu-linux-user.28156

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File 0250-hw-display-qxl-Have-qxl_log_command.patch of Package qemu-linux-user.28156

From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@linaro.org>
Date: Mon, 28 Nov 2022 21:27:37 +0100
Subject: hw/display/qxl: Have qxl_log_command Return early if no log_cmd
 handler
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Git-commit: 61c34fc194b776ecadc39fb26b061331107e5599
References: bsc#1205808, CVE-2022-4144

Only 3 command types are logged: no need to call qxl_phys2virt()
for the other types. Using different cases will help to pass
different structure sizes to qxl_phys2virt() in a pair of commits.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20221128202741.4945-2-philmd@linaro.org>
Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
---
 hw/display/qxl-logger.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hw/display/qxl-logger.c b/hw/display/qxl-logger.c
index 2ec6d8fa3d6cd3b6596d76654d53..551c274c2744c7b963db67765fe7 100644
--- a/hw/display/qxl-logger.c
+++ b/hw/display/qxl-logger.c
@@ -249,6 +249,16 @@ int qxl_log_command(PCIQXLDevice *qxl, const char *ring, QXLCommandExt *ext)
             qxl_name(qxl_type, ext->cmd.type),
             compat ? "(compat)" : "");
 
+    switch (ext->cmd.type) {
+    case QXL_CMD_DRAW:
+        break;
+    case QXL_CMD_SURFACE:
+        break;
+    case QXL_CMD_CURSOR:
+        break;
+    default:
+        goto out;
+    }
     data = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
     if (!data) {
         return 1;
@@ -271,6 +281,7 @@ int qxl_log_command(PCIQXLDevice *qxl, const char *ring, QXLCommandExt *ext)
         qxl_log_cmd_cursor(qxl, data, ext->group_id);
         break;
     }
+out:
     fprintf(stderr, "\n");
     return 0;
 }

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File 0250-hw-display-qxl-Have-qxl_log_command.patch of Package qemu-linux-user.28156

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