From nobody Sat Feb 7 05:33:04 2026 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) (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 24D4339E197; Tue, 3 Feb 2026 13:37:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.187 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770125837; cv=none; b=aeuUchoOf0M9IjtqKprMew9a2BepMfSv2ohc8n7qsk8xOIf/v1DwdVCKBWfV2gcDfnzYjAVEareOoBm8ta4I5boEgZk03ye73QbnTqKVwdFdTvnSMkLHepHPjLIn7GvHzMcTl3BU67x+6bj3wUf95CkHii/FIRGLjSNzMnMInEk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770125837; c=relaxed/simple; bh=JwuHP1sq3T4XAte3CiA8By9Pb6Zy34PlS5pERchEBYU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=qcrsIsC1JdYJeDQ5LL2nZ5bY1qss1WIMWnN8fWgVnTsEKfbTqqB6LZotvjaOUxsyKzabsjtRxgPIvzCV9eDNHuik7t164M3Zgmjhavg2xCoDuFjcH2fpVmeOXliS7dk7kp2w5TVipynfsh9eeFhMCMW3TdMaFG2ljAw76X41gKs= 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=1HsPy7IV; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b=1HsPy7IV; arc=none smtp.client-ip=45.249.212.187 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="1HsPy7IV"; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b="1HsPy7IV" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=afh8FvCb9EHKgkE+4+/25vww4aVm2AkzGm6S3B5KCYc=; b=1HsPy7IVGWvtySLu6kgJfWHKRZwiFzVZFbT10zodPsiC9sAPlouCKf2Cv82vRYDHpvzHGBOvI mF34Io2lM1QzY+QbJkoK8wftipvuBjkT7L3uZJwebReX/BVYcwTMPiHXelzDaFQtgRDREzJEg5J LKT9D4K/Hn6x9hfhM/T4nB0= Received: from canpmsgout01.his.huawei.com (unknown [172.19.92.178]) by szxga01-in.huawei.com (SkyGuard) with ESMTPS id 4f54JX5WWjz1BG3p; Tue, 3 Feb 2026 21:36:28 +0800 (CST) dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=afh8FvCb9EHKgkE+4+/25vww4aVm2AkzGm6S3B5KCYc=; b=1HsPy7IVGWvtySLu6kgJfWHKRZwiFzVZFbT10zodPsiC9sAPlouCKf2Cv82vRYDHpvzHGBOvI mF34Io2lM1QzY+QbJkoK8wftipvuBjkT7L3uZJwebReX/BVYcwTMPiHXelzDaFQtgRDREzJEg5J LKT9D4K/Hn6x9hfhM/T4nB0= Received: from mail.maildlp.com (unknown [172.19.163.104]) by canpmsgout01.his.huawei.com (SkyGuard) with ESMTPS id 4f54DG4JKBz1T4Lx; Tue, 3 Feb 2026 21:32:46 +0800 (CST) Received: from dggpemf500011.china.huawei.com (unknown [7.185.36.131]) by mail.maildlp.com (Postfix) with ESMTPS id CCD2C4056A; Tue, 3 Feb 2026 21:37:07 +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; Tue, 3 Feb 2026 21:37:05 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: Subject: [PATCH v12 03/13] arm64/ptrace: Return early for ptrace_report_syscall_entry() error Date: Tue, 3 Feb 2026 21:37:18 +0800 Message-ID: <20260203133728.848283-4-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260203133728.848283-1-ruanjinjie@huawei.com> References: <20260203133728.848283-1-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: kwepems200002.china.huawei.com (7.221.188.68) 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 Signed-off-by: Will Deacon --- 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