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-rw-r--r--libmount/src/context_mount.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/libmount/src/context_mount.c b/libmount/src/context_mount.c
index 307da3c5c..58224088a 100644
--- a/libmount/src/context_mount.c
+++ b/libmount/src/context_mount.c
@@ -60,6 +60,9 @@ static int mnt_context_append_additional_mount(struct libmnt_context *cxt,
assert(cxt);
assert(ad);
+ if (!list_empty(&ad->mounts))
+ return -EINVAL;
+
DBG(CXT, ul_debugobj(cxt,
"mount: add additional flag: 0x%08lx",
ad->mountflags));