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serial: nrfx_uarte: check size before writing to buffer

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NRFX UARTE would write to user supplied buffer on IRQ without checking
whether or not the supplied buffer had available space left to write
one char

Signed-off-by: Arne Edholm <arne.edholm@assaabloy.com>
This commit is contained in:
Arne Edholm 2021-05-03 10:11:28 +02:00 • committed by Carles Cufí
commit 2b864edbcd
1 changed files with 1 additions and 1 deletions
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2
drivers/serial/uart_nrfx_uarte.c
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@ -1452,7 +1452,7 @@ static int uarte_nrfx_fifo_read(const struct device *dev,
NRF_UARTE_Type *uarte = get_uarte_instance(dev);
const struct uarte_nrfx_data *data = get_dev_data(dev);
if (nrf_uarte_event_check(uarte, NRF_UARTE_EVENT_ENDRX)) {
if (size > 0 && nrf_uarte_event_check(uarte, NRF_UARTE_EVENT_ENDRX)) {
/* Clear the interrupt */
nrf_uarte_event_clear(uarte, NRF_UARTE_EVENT_ENDRX);