41 lines
1.5 KiB
Diff
41 lines
1.5 KiB
Diff
From: Prasad J Pandit <address@hidden>
|
|
|
|
When processing svga command DEFINE_CURSOR in vmsvga_fifo_run,
|
|
the computed BITMAP and PIXMAP size are checked against the
|
|
'cursor.mask[]' and 'cursor.image[]' array sizes in bytes.
|
|
Correct these checks to avoid OOB memory access.
|
|
|
|
Reported-by: Qinghao Tang <address@hidden>
|
|
Reported-by: Li Qiang <address@hidden>
|
|
Signed-off-by: Prasad J Pandit <address@hidden>
|
|
---
|
|
hw/display/vmware_vga.c | 12 +++++++-----
|
|
1 file changed, 7 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/hw/display/vmware_vga.c b/hw/display/vmware_vga.c
|
|
index e51a05e..6599cf0 100644
|
|
--- a/hw/display/vmware_vga.c
|
|
+++ b/hw/display/vmware_vga.c
|
|
@@ -676,11 +676,13 @@ static void vmsvga_fifo_run(struct vmsvga_state_s *s)
|
|
cursor.bpp = vmsvga_fifo_read(s);
|
|
|
|
args = SVGA_BITMAP_SIZE(x, y) + SVGA_PIXMAP_SIZE(x, y, cursor.bpp);
|
|
- if (cursor.width > 256 ||
|
|
- cursor.height > 256 ||
|
|
- cursor.bpp > 32 ||
|
|
- SVGA_BITMAP_SIZE(x, y) > sizeof cursor.mask ||
|
|
- SVGA_PIXMAP_SIZE(x, y, cursor.bpp) > sizeof cursor.image) {
|
|
+ if (cursor.width > 256
|
|
+ || cursor.height > 256
|
|
+ || cursor.bpp > 32
|
|
+ || SVGA_BITMAP_SIZE(x, y)
|
|
+ > sizeof(cursor.mask) / sizeof(cursor.mask[0])
|
|
+ || SVGA_PIXMAP_SIZE(x, y, cursor.bpp)
|
|
+ > sizeof(cursor.image) / sizeof(cursor.image[0])) {
|
|
goto badcmd;
|
|
}
|
|
|
|
--
|
|
2.5.5
|
|
|