fix race condition in pthread_kill

[musl] / src / thread / pthread_create.c

diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c
index c856c58..d60c2a4 100644 (file)
--- a/src/thread/pthread_create.c
+++ b/src/thread/pthread_create.c
@@ -27,7 +27,9 @@ void __pthread_unwind_next(struct __ptcb *cb)
        __lock(&self->exitlock);
 
        /* Mark this thread dead before decrementing count */
+       __lock(&self->killlock);
        self->dead = 1;
+       a_store(&self->killlock, 0);
 
        do n = libc.threads_minus_1;
        while (n && a_cas(&libc.threads_minus_1, n, n-1)!=n);