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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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6
components/hal/esp32c2/include/hal/uart_ll.h
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@ -159,13 +159,15 @@ 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
// an integer part and a fractional part.
hw->clk_div.div_int = clk_div >> 4;
hw->clk_div.div_frag = clk_div & 0xf;
hw->clk_div.div_frag = clk_div & 0xf;
hw->clk_conf.sclk_div_num = sclk_div - 1;
#undef DIV_UP
}

6
components/hal/esp32c3/include/hal/uart_ll.h
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@ -161,13 +161,15 @@ 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
// an integer part and a fractional part.
hw->clk_div.div_int = clk_div >> 4;
hw->clk_div.div_frag = clk_div & 0xf;
hw->clk_div.div_frag = clk_div & 0xf;
HAL_FORCE_MODIFY_U32_REG_FIELD(hw->clk_conf, sclk_div_num, sclk_div - 1);
#undef DIV_UP
}

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

4
components/hal/esp32h2/include/hal/uart_ll.h
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@ -194,7 +194,9 @@ 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

6
components/hal/esp32s3/include/hal/uart_ll.h
View File

@ -133,13 +133,15 @@ 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
// an integer part and a fractional part.
hw->clkdiv.clkdiv = clk_div >> 4;
hw->clkdiv.clkdiv_frag = clk_div & 0xf;
hw->clkdiv.clkdiv_frag = clk_div & 0xf;
HAL_FORCE_MODIFY_U32_REG_FIELD(hw->clk_conf, sclk_div_num, sclk_div - 1);
#undef DIV_UP
}