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flash: sandbox: fix size checks and erase initial memory

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This commit is contained in:
S.J.R. van Schaik 2017-03-11 13:51:04 +00:00
parent 4a176a404c
commit 2f82854e8a
1 changed files with 3 additions and 2 deletions
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5
source/drivers/sandbox_flash.c
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@ -32,7 +32,7 @@ static int stdio_flash_read(struct flash_dev *dev, uint32_t addr, void *data,
{ {
struct stdio_flash_priv *priv = dev->priv; struct stdio_flash_priv *priv = dev->priv;
if (addr > priv->size || priv->size - addr > len) if (addr > priv->size || len > priv->size - addr)
return -1; return -1;
memcpy(data, priv->data + addr, len); memcpy(data, priv->data + addr, len);
@ -48,7 +48,7 @@ static int stdio_flash_write(struct flash_dev *dev, uint32_t addr,
char *dst; char *dst;
size_t i; size_t i;
if (addr > priv->size || priv->size - addr > len) if (addr > priv->size || len > priv->size - addr)
return -1; return -1;
src = data; src = data;
@ -89,6 +89,7 @@ struct flash_dev *flash_probe(void)
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0))) MAP_ANONYMOUS | MAP_PRIVATE, -1, 0)))
goto err_free_priv; goto err_free_priv;
memset(priv->data, 0xFF, CONFIG_FLASH_SIZE);
priv->size = CONFIG_FLASH_SIZE; priv->size = CONFIG_FLASH_SIZE;
dev->priv = priv; dev->priv = priv;