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util/aio-win32: Correct the event array size in aio_poll()

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WaitForMultipleObjects() can only wait for MAXIMUM_WAIT_OBJECTS
object handles. Correct the event array size in aio_poll() and
add a assert() to ensure it does not cause out of bound access.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221019102015.2441622-3-bmeng.cn@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Bin Meng 2022-10-19 18:20:15 +08:00 committed by Paolo Bonzini
parent d393b0a176
commit e0d034bb24
1 changed files with 3 additions and 2 deletions
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5
util/aio-win32.c
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@ -326,9 +326,9 @@ void aio_dispatch(AioContext *ctx)
bool aio_poll(AioContext *ctx, bool blocking)
{
AioHandler *node;
HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
HANDLE events[MAXIMUM_WAIT_OBJECTS];
bool progress, have_select_revents, first;
int count;
unsigned count;
int timeout;
/*
@ -369,6 +369,7 @@ bool aio_poll(AioContext *ctx, bool blocking)
QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) {
if (!node->deleted && node->io_notify
&& aio_node_check(ctx, node->is_external)) {
assert(count < MAXIMUM_WAIT_OBJECTS);
events[count++] = event_notifier_get_handle(node->e);
}
}