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[Qemu-devel] [PATCH RFC v2 2/5] qemu_thread_join: fix segmentation fault
From: |
Fei Li |
Subject: |
[Qemu-devel] [PATCH RFC v2 2/5] qemu_thread_join: fix segmentation fault |
Date: |
Thu, 29 Nov 2018 18:03:37 +0800 |
To avoid the segmentation fault in qemu_thread_join(), just directly
return when the QemuThread *thread failed to be created in either
qemu-thread-posix.c or qemu-thread-win32.c.
Signed-off-by: Fei Li <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
---
util/qemu-thread-posix.c | 3 +++
util/qemu-thread-win32.c | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/util/qemu-thread-posix.c b/util/qemu-thread-posix.c
index 865e476df5..b9ab5a4711 100644
--- a/util/qemu-thread-posix.c
+++ b/util/qemu-thread-posix.c
@@ -558,6 +558,9 @@ void *qemu_thread_join(QemuThread *thread)
int err;
void *ret;
+ if (!thread->thread) {
+ return NULL;
+ }
err = pthread_join(thread->thread, &ret);
if (err) {
error_exit(err, __func__);
diff --git a/util/qemu-thread-win32.c b/util/qemu-thread-win32.c
index 4a363ca675..1a27e1cf6f 100644
--- a/util/qemu-thread-win32.c
+++ b/util/qemu-thread-win32.c
@@ -366,7 +366,7 @@ void *qemu_thread_join(QemuThread *thread)
HANDLE handle;
data = thread->data;
- if (data->mode == QEMU_THREAD_DETACHED) {
+ if (data == NULL || data->mode == QEMU_THREAD_DETACHED) {
return NULL;
}
--
2.13.7