motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-07-26 20:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

util/main-loop: Avoid adding the same HANDLE twice

Browse source 
Fix the logic in qemu_add_wait_object() to avoid adding the same
HANDLE twice, as the behavior is undefined when passing an array
that contains same HANDLEs to WaitForMultipleObjects() API.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Message-Id: <20221019102015.2441622-2-bmeng.cn@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Bin Meng 2022-10-19 18:20:14 +08:00 • committed by Paolo Bonzini
parent 4f76b3d9bb
commit d393b0a176
2 changed files with 12 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

10
util/main-loop.c
View file

@ -373,10 +373,20 @@ static WaitObjects wait_objects = {0};
int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
{
int i;
WaitObjects *w = &wait_objects;
if (w->num >= MAXIMUM_WAIT_OBJECTS) {
return -1;
}
for (i = 0; i < w->num; i++) {
/* check if the same handle is added twice */
if (w->events[i] == handle) {
return -1;
}
}
w->events[w->num] = handle;
w->func[w->num] = func;
w->opaque[w->num] = opaque;