[PATCH 3/3] virtiofsd: check whether strdup lo.source return NULL in main func

[Haotian Li]

In main func, strdup lo.source may fail. So check whether strdup
lo.source return NULL before using it.

Signed-off-by: Haotian Li <lihaoti...@huawei.com>
Signed-off-by: Zhiqiang Liu <liuzhiqian...@huawei.com>
---
 tools/virtiofsd/passthrough_ll.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index 3e9bbc7a04..0c11134fb5 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -3525,6 +3525,10 @@ int main(int argc, char *argv[])
         }
     } else {
         lo.source = strdup("/");
+        if (!lo.source) {
+            fuse_log(FUSE_LOG_ERR, "failed to strdup source\n");
+            goto err_out1;
+        }
     }

     if (lo.xattrmap) {
--