From: Roman Kagan <rvka...@yandex-team.ru>
Fix the (hypothetical) potential problem when the value parsed out of
the vhost module parameter in sysfs overflows the return value from
vhost_kernel_memslots_limit.
Signed-off-by: Roman Kagan <rvka...@yandex-team.ru>
Message-Id: <20211111153354.18807-6-rvka...@yandex-team.ru>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
---
hw/virtio/vhost-backend.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c
index b65f8f7e97..44f7dbb243 100644
--- a/hw/virtio/vhost-backend.c
+++ b/hw/virtio/vhost-backend.c
@@ -58,7 +58,7 @@ static int vhost_kernel_memslots_limit(struct vhost_dev *dev)
if (g_file_get_contents("/sys/module/vhost/parameters/max_mem_regions",
&s, NULL, NULL)) {
uint64_t val = g_ascii_strtoull(s, NULL, 10);
- if (!((val == G_MAXUINT64 || !val) && errno)) {
+ if (val < INT_MAX && val > 0) {
g_free(s);
return val;
}
--
MST
