From nobody Tue Feb 10 10:18:59 2026 Received: from canpmsgout01.his.huawei.com (canpmsgout01.his.huawei.com [113.46.200.216]) (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 E835C30F552; Mon, 22 Dec 2025 11:48:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.216 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766404100; cv=none; b=O1chpMkz3M5xbzwuFS3PRHcp1ph2E9uaogBSRvZK8qAt+jVSNgXnHh6RglL8QJAbyZr0TMurKDfvj+SWKD453FDqXmVNJFusDguCfvyVr3KtZPONoXQEeVl2SmPn+kCoj7lrc3xVAsjs9gFrAgvtaEaadOl236j49OSmPk+Z6Wo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766404100; c=relaxed/simple; bh=e2WbpbCMzHLqBkoEtGaFBePKKKYbMo6SyDuqYb8qkLc=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=eKGmZUPR6KUq5UIKJ/6UJS6bzGkzZpQGCb9H3kcTFiSB779F6P/bEeWiYaDuZ9SFiaYzJKLV3olvzTjmrCFlD4pfASRNqlJ3wOF8tViRyolhSqgyx7TDjEi87nI28pUrJz1eBnc4fPwF9oYj7vNvs0Vf1ZViyBvRhrH6925zPOc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b=H07+Cca2; arc=none smtp.client-ip=113.46.200.216 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b="H07+Cca2" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=eA9FmNXHGiOZZGgTL6Sla6Y2umwnwt6FXz/Hs6qRHm4=; b=H07+Cca2xuxeNQpzvbRVmh8CyvEBwrt6UIo902ma750PFu24SIMd5UR52h0063FIyECjxm0Qt 6O0Y7f3whHfpdAAHfOC/G8ZJ9d2sd3Tnz199rOns6TCik7R/Ojo+FTGTmx8iDnF/17f8pkZgbRe mlSK4OHEbDVRcQm2aRzBTgw= Received: from mail.maildlp.com (unknown [172.19.162.223]) by canpmsgout01.his.huawei.com (SkyGuard) with ESMTPS id 4dZbtr6fL6z1T4GL; Mon, 22 Dec 2025 19:45:56 +0800 (CST) Received: from dggpemf500011.china.huawei.com (unknown [7.185.36.131]) by mail.maildlp.com (Postfix) with ESMTPS id 3E50240562; Mon, 22 Dec 2025 19:48:16 +0800 (CST) Received: from huawei.com (10.90.53.73) by dggpemf500011.china.huawei.com (7.185.36.131) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 22 Dec 2025 19:48:14 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v10 03/16] arm64/ptrace: Return early for ptrace_report_syscall_entry() error Date: Mon, 22 Dec 2025 19:47:24 +0800 Message-ID: <20251222114737.1334364-4-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251222114737.1334364-1-ruanjinjie@huawei.com> References: <20251222114737.1334364-1-ruanjinjie@huawei.com> 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-ClientProxiedBy: kwepems100001.china.huawei.com (7.221.188.238) To dggpemf500011.china.huawei.com (7.185.36.131) Content-Type: text/plain; charset="utf-8" The generic entry abort the syscall_trace_enter() sequence if ptrace_report_syscall_entry() errors out, but arm64 not. When ptrace requests interception, it should prevent all subsequent system-call processing, including audit and seccomp. In preparation for moving arm64 over to the generic entry code, return early if ptrace_report_syscall_entry() encounters an error. Reviewed-by: Kevin Brodsky Signed-off-by: Jinjie Ruan --- arch/arm64/kernel/ptrace.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 03fe2f8a4d54..f333791ffba6 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -2372,15 +2372,18 @@ static __always_inline unsigned long ptrace_save_re= g(struct pt_regs *regs, return saved_reg; } =20 -static void report_syscall_entry(struct pt_regs *regs) +static int report_syscall_entry(struct pt_regs *regs) { unsigned long saved_reg; - int regno; + int regno, ret; =20 saved_reg =3D ptrace_save_reg(regs, PTRACE_SYSCALL_ENTER, ®no); - if (ptrace_report_syscall_entry(regs)) + ret =3D ptrace_report_syscall_entry(regs); + if (ret) forget_syscall(regs); regs->regs[regno] =3D saved_reg; + + return ret; } =20 static void report_syscall_exit(struct pt_regs *regs) @@ -2407,10 +2410,11 @@ static void report_syscall_exit(struct pt_regs *reg= s) int syscall_trace_enter(struct pt_regs *regs) { unsigned long flags =3D read_thread_flags(); + int ret; =20 if (flags & (_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE)) { - report_syscall_entry(regs); - if (flags & _TIF_SYSCALL_EMU) + ret =3D report_syscall_entry(regs); + if (ret || (flags & _TIF_SYSCALL_EMU)) return NO_SYSCALL; } =20 --=20 2.34.1