bpf: Replace kvfree with kfree for kzalloc memory

The 'backedge' pointer is allocated with kzalloc(), which returns
physically contiguous memory. Using kvfree() to deallocate such
memory is functionally safe but semantically incorrect.

Replace kvfree() with kfree() to avoid unnecessary is_vmalloc_addr()
check in kvfree().

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20250811123949.552885-1-rongqianfeng@vivo.com

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 3c2e7f36a09c91f589d0a057908e43624eea981f..3a3982fe20d48ab40e0b726728564a3dfc3a2016 100644 (file)
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -19553,7 +19553,7 @@ hit:
                                err = err ?: add_scc_backedge(env, &sl->state, backedge);
                                if (err) {
                                        free_verifier_state(&backedge->state, false);
-                                       kvfree(backedge);
+                                       kfree(backedge);
                                        return err;
                                }
                        }