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-rw-r--r--fs/userfaultfd.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index 4b53dc4a3266..390e4b7d9cb9 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -786,6 +786,8 @@ void mremap_userfaultfd_fail(struct vm_userfaultfd_ctx *vm_ctx)
if (!ctx)
return;
+ atomic_dec(&ctx->mmap_changing);
+ VM_WARN_ON_ONCE(atomic_read(&ctx->mmap_changing) < 0);
userfaultfd_ctx_put(ctx);
}