From: Lidong Chen <lidong.c...@oracle.com>
The check for poll_fds in g_assert() was incorrect. The correct assertion
should check "n_poll_fds + w->num <= ARRAY_SIZE(poll_fds)" because the
subsequent for-loop is doing access to poll_fds[n_poll_fds + i] where i
is in [0, w->num). This could happen with a very high number of file
descriptors and/or wait objects.
Signed-off-by: Lidong Chen <lidong.c...@oracle.com>
Suggested-by: Peter Maydell <peter.mayd...@linaro.org>
Suggested-by: Liam Merwick <liam.merw...@oracle.com>
Reviewed-by: Liran Alon <liran.a...@oracle.com>
Reviewed-by: Darren Kenny <darren.ke...@oracle.com>
Reviewed-by: Li Qiang <liq...@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
Message-Id:
<ded30967982811617ce7f0222d11228130c198b7.1560806687.git.lidong.c...@oracle.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
util/main-loop.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/util/main-loop.c b/util/main-loop.c
index e1e349c..a9f4e8d 100644
--- a/util/main-loop.c
+++ b/util/main-loop.c
@@ -422,7 +422,7 @@ static int os_host_main_loop_wait(int64_t timeout)
g_main_context_prepare(context, &max_priority);
n_poll_fds = g_main_context_query(context, max_priority, &poll_timeout,
poll_fds, ARRAY_SIZE(poll_fds));
- g_assert(n_poll_fds <= ARRAY_SIZE(poll_fds));
+ g_assert(n_poll_fds + w->num <= ARRAY_SIZE(poll_fds));
for (i = 0; i < w->num; i++) {
poll_fds[n_poll_fds + i].fd = (DWORD_PTR)w->events[i];
--
1.8.3.1
