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fix(uart): Fix uart_ll_set_baudrate div-by-zero crash due to uint32_t overflow

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Merges https://github.com/espressif/esp-idf/pull/12179
This commit is contained in:
Eduardo Lacerda Campos
2023-09-01 18:33:08 -04:00
committed by Song Ruo Jing
parent ddcb5f663c
commit b0bde58521
5 changed files with 18 additions and 8 deletions
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4
components/hal/esp32c6/include/hal/uart_ll.h
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@@ -305,7 +305,9 @@ FORCE_INLINE_ATTR void uart_ll_set_baudrate(uart_dev_t *hw, uint32_t baud, uint3
{
#define DIV_UP(a, b) (((a) + (b) - 1) / (b))
const uint32_t max_div = BIT(12) - 1; // UART divider integer part only has 12 bits
int sclk_div = DIV_UP(sclk_freq, max_div * baud);
uint32_t sclk_div = DIV_UP(sclk_freq, (uint64_t)max_div * baud);
if (sclk_div == 0) abort();
uint32_t clk_div = ((sclk_freq) << 4) / (baud * sclk_div);
// The baud rate configuration register is divided into