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fix(lwip): prevent integer overflow in sys_arch_sem_wait timeout

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jjsch-dev
2026-04-29 13:32:47 +02:00
committed by David Cermak
parent 338f341110
commit d0dcfda4bf
1 changed files with 6 additions and 2 deletions
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components/lwip/port/freertos/sys_arch.c
+6 -2
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@@ -164,8 +164,12 @@ u32_t
sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout) sys_arch_sem_wait(sys_sem_t *sem, u32_t timeout)
{ {
BaseType_t ret; BaseType_t ret;
/* * Protect against Integer Overflow:
if (!timeout) { * If timeout is 0 (LwIP infinite wait), or if it's so large that adding
* portTICK_PERIOD_MS would overflow the 32-bit unsigned integer,
* we force it to wait infinitely.
*/
if (!timeout || timeout >= (UINT32_MAX - portTICK_PERIOD_MS)) {
/* wait infinite */ /* wait infinite */
ret = xSemaphoreTake((QueueHandle_t)sem, portMAX_DELAY); ret = xSemaphoreTake((QueueHandle_t)sem, portMAX_DELAY);
LWIP_ASSERT("taking semaphore failed", ret == pdTRUE); LWIP_ASSERT("taking semaphore failed", ret == pdTRUE);