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sys/suit: Ensure previous thread is stopped before reusing its stack

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Closes: https://github.com/RIOT-OS/RIOT/issues/19195
This commit is contained in:
chrysn 2023-01-25 18:01:14 +01:00
parent d6f44f6206
commit 2c716d3ede
1 changed files with 13 additions and 1 deletions
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14
sys/suit/transport/worker.c
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@ -79,6 +79,8 @@ static char _url[CONFIG_SOCK_URLPATH_MAXLEN];
static uint8_t _manifest_buf[SUIT_MANIFEST_BUFSIZE];
static mutex_t _worker_lock;
/* PID of the worker thread, guarded by */
static kernel_pid_t _worker_pid = KERNEL_PID_UNDEF;
int suit_handle_url(const char *url)
{
@ -154,17 +156,27 @@ static void *_suit_worker_thread(void *arg)
}
mutex_unlock(&_worker_lock);
thread_zombify();
/* Actually unreachable, given we're in a thread */
return NULL;
}
void suit_worker_trigger(const char *url, size_t len)
{
mutex_lock(&_worker_lock);
if (_worker_pid != KERNEL_PID_UNDEF) {
if (thread_kill_zombie(_worker_pid) != 1) {
/* This will only happen if the SUIT thread runs on a lower
* priority than the caller */
LOG_WARNING("Ignoring SUIT trigger: worker is still busy.\n");
return;
}
}
memcpy(_url, url, len);
_url[len] = '\0';
thread_create(_stack, SUIT_WORKER_STACKSIZE, SUIT_COAP_WORKER_PRIO,
_worker_pid = thread_create(_stack, SUIT_WORKER_STACKSIZE, SUIT_COAP_WORKER_PRIO,
THREAD_CREATE_STACKTEST,
_suit_worker_thread, NULL, "suit worker");
}