Message ID | 1464592161-18348-3-git-send-email-kraxel@redhat.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
diff --git a/hw/display/vmware_vga.c b/hw/display/vmware_vga.c index 63a7c05..a26e62e 100644 --- a/hw/display/vmware_vga.c +++ b/hw/display/vmware_vga.c @@ -563,7 +563,10 @@ static inline int vmsvga_fifo_length(struct vmsvga_state_s *s) if (CMD(min) < (uint8_t *) s->cmd->fifo - (uint8_t *) s->fifo) { return 0; } - if (CMD(max) > SVGA_FIFO_SIZE) { + if (CMD(max) > SVGA_FIFO_SIZE || + CMD(min) >= SVGA_FIFO_SIZE || + CMD(stop) >= SVGA_FIFO_SIZE || + CMD(next_cmd) >= SVGA_FIFO_SIZE) { return 0; } if (CMD(max) < CMD(min) + 10 * 1024) {
Make sure all fifo ptrs are within range. Fixes: CVE-2016-4454 Cc: P J P <ppandit@redhat.com> Reported-by: 李强 <liqiang6-s@360.cn> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> --- hw/display/vmware_vga.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)