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Prevent buffer overflow.

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Signed-off-by: MasterPhi <admin@hifiphile.com>
This commit is contained in:
MasterPhi 2021-06-15 21:16:51 +02:00
parent 54dc694be4
commit 6cc702e9ec
1 changed files with 13 additions and 3 deletions
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16
src/portable/microchip/samx7x/dcd_samx7x.c
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@ -238,8 +238,13 @@ static void dcd_ep_handler(uint8_t ep_ix)
if (int_status & USBHS_DEVEPTISR_RXOUTI)
{
xfer_ctl_t *xfer = &xfer_status[0];
if (count)
if (count && xfer->total_len)
{
uint16_t remain = xfer->total_len - xfer->queued_len;
if (count > remain)
{
count = remain;
}
uint8_t *ptr = EP_GET_FIFO_PTR(0,8);
if (xfer->buffer)
{
@ -256,7 +261,7 @@ static void dcd_ep_handler(uint8_t ep_ix)
if ((count < xfer->max_packet_size) || (xfer->queued_len == xfer->total_len))
{
// RX COMPLETE
dcd_event_xfer_complete(0, 0, xfer->queued_len, XFER_RESULT_SUCCESS, true);
dcd_event_xfer_complete(0, 0, xfer->total_len, XFER_RESULT_SUCCESS, true);
// Disable the interrupt
USBHS->USBHS_DEVEPTIDR[0] = USBHS_DEVEPTIDR_RXOUTEC;
// Though the host could still send, we don't know.
@ -280,8 +285,13 @@ static void dcd_ep_handler(uint8_t ep_ix)
if (int_status & USBHS_DEVEPTISR_RXOUTI)
{
xfer_ctl_t *xfer = &xfer_status[ep_ix];
if (count)
if (count && xfer->total_len)
{
uint16_t remain = xfer->total_len - xfer->queued_len;
if (count > remain)
{
count = remain;
}
uint8_t *ptr = EP_GET_FIFO_PTR(ep_ix,8);
if (xfer->buffer)
{