[Qemu-devel] [PATCH] [M25P80] Make sure not to overrun the internal data buffer.

[Jean-Christophe Dubois <jcd@tribudubois.net>]

It did happen that the internal data buffer was overrun leading to a Qemu
crash (in particular while emulating the i.MX6 sabrelite board).

This patch makes sure the data array would not be overrun and allow the
sabrelite emulation to run without crash.

Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
---
 hw/block/m25p80.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index d29ff4c..a1c4e5d 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -1117,7 +1117,7 @@ static uint32_t m25p80_transfer8(SSISlave *ss, uint32_t tx)
         s->data[s->len] = (uint8_t)tx;
         s->len++;
 
-        if (s->len == s->needed_bytes) {
+        if ((s->len >= s->needed_bytes) || (s->len >= sizeof(s->data))) {
             complete_collecting_data(s);
         }
         break;
-- 
2.9.3