From nobody Fri Apr 3 07:42:21 2026 Received: from out-177.mta1.migadu.com (out-177.mta1.migadu.com [95.215.58.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 47439260580 for ; Wed, 18 Feb 2026 00:31:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771374695; cv=none; b=Il1detRNDHfhtXFiOXbuuxRzFJxapAzySffZfLorlPophkCmLnOjJGq18fkbSgBnvByj35hAiBhsvcOBiV/mB6MDwzz7aIHCoaWNklcRECf6vwUPMgjkYc3g2mUKYanOqZqjbYbJPkYwFfp04Guezcn8ghskhbE5h77UWgG2c/Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771374695; c=relaxed/simple; bh=MzkexYF0KXI6/3f5A4mloKiVVpwcWcpdxEdjkRZ1j64=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ulwugWYxeHt/rRfUZI7qGR+86TdEjNUfQVxALg6D3oRp58D6qt27TnJx9NUnZsKgZ+u6pVIrJ0hgN5VpPrYruWNFWRNT/s8dGiHJL4y+s1ty1hAHMTftMjOaTlrcrWjD0AKxBsn7J5Oy8MALrKRFSUcZXAfGXinnAxQ43PhsJJI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=C5UNJADe; arc=none smtp.client-ip=95.215.58.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="C5UNJADe" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1771374692; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=t09EQpvSYD39X1EIK3P1BpaFzBMy5xyjK9v+7bVPEt8=; b=C5UNJADeqyWs/YvTFuoLIlyq9BH3Qt7/qzbTCsaZ4Y0ABuOgauTypM+AJzFD8/ibYU7UoF BZfFff2YjvJxtPUEOUcKcAzU66a8sEwRzus+w3MfntS09mbj8sGdfsoj1ZGNZWuxakWcS0 X9TiGSHZGIJiU8MTn6OEgrC4fmIFWdQ= From: Ihor Solodrai To: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Eduard Zingerman , Jiri Olsa , Mykyta Yatsenko , =?UTF-8?q?Alexis=20Lothor=C3=A9?= Cc: Amery Hung , bpf@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: [PATCH bpf v2 08/15] selftests/bpf: Fix use-after-free in xdp_metadata test Date: Tue, 17 Feb 2026 16:30:34 -0800 Message-ID: <20260218003041.1156774-9-ihor.solodrai@linux.dev> In-Reply-To: <20260218003041.1156774-1-ihor.solodrai@linux.dev> References: <20260218003041.1156774-1-ihor.solodrai@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT Content-Type: text/plain; charset="utf-8" ASAN reported a use-after-free in close_xsk(). The xsk->socket internally references xsk->umem via socket->ctx->umem, so the socket must be deleted before the umem. Fix the order of operations in close_xsk(). Acked-by: Mykyta Yatsenko Signed-off-by: Ihor Solodrai --- tools/testing/selftests/bpf/prog_tests/xdp_metadata.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c b/tools/= testing/selftests/bpf/prog_tests/xdp_metadata.c index 19f92affc2da..5c31054ad4a4 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c @@ -126,10 +126,10 @@ static int open_xsk(int ifindex, struct xsk *xsk) =20 static void close_xsk(struct xsk *xsk) { - if (xsk->umem) - xsk_umem__delete(xsk->umem); if (xsk->socket) xsk_socket__delete(xsk->socket); + if (xsk->umem) + xsk_umem__delete(xsk->umem); munmap(xsk->umem_area, UMEM_SIZE); } =20 --=20 2.53.0