From: Qianfeng Rong <rongqianfeng@vivo.com>
Date: Mon, 11 Aug 2025 12:39:49 +0000 (+0800)
Subject: bpf: Replace kvfree with kfree for kzalloc memory
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bf0c2a84df9fb0f7779eb24c30198ef93f292e66;p=thirdparty%2Fkernel%2Fstable.git

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 3c2e7f36a09c9..3a3982fe20d48 100644
--- 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;
 				}
 			}