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[Qemu-devel] [PATCH] display: vga: add check to limit display width
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P J P |
Subject: |
[Qemu-devel] [PATCH] display: vga: add check to limit display width |
Date: |
Tue, 26 Apr 2016 13:37:38 +0530 |
From: Prasad J Pandit <address@hidden>
In vga_draw_graphic, display width could exceed the maximum
range of VBE_DISPI_MAX_XRES(16000). This could lead to possible
integer overflows. Add check to avoid it.
Reported-by: Zuozhi Fzz <address@hidden>
Signed-off-by: Prasad J Pandit <address@hidden>
---
hw/display/vga.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/hw/display/vga.c b/hw/display/vga.c
index 9f68394..1a66291 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -1478,6 +1478,9 @@ static void vga_draw_graphic(VGACommonState *s, int
full_update)
disp_width <<= 1;
}
}
+ if (disp_width > VBE_DISPI_MAX_XRES) {
+ disp_width = VBE_DISPI_MAX_XRES;
+ }
depth = s->get_bpp(s);
--
2.5.5
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