From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E9A8C3F6B0 for ; Mon, 8 Aug 2022 01:55:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243227AbiHHBzO (ORCPT ); Sun, 7 Aug 2022 21:55:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243794AbiHHBvy (ORCPT ); Sun, 7 Aug 2022 21:51:54 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F01351A07E; Sun, 7 Aug 2022 18:38:42 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 08526CE0F6E; Mon, 8 Aug 2022 01:38:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25E34C433D6; Mon, 8 Aug 2022 01:38:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1659922719; bh=dVAKuP0k3jQdgg3zKm/je6I06KVgigLnek50Bw8I6pI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gu8YJW+fNnUox6GWXHuogMMhmrLPZIOm7NTm9rzwtVkNJNkwxgwF+kO2l2yhiicIB GUM2h7K4XNpDrKVpp0PNh7ClrSeemu0hGI8HHk61JNV5eRvuSUeixnaUVOJLjjvMzj raDflgCwB2RDE713xR6lZYe4h25lBV4QuoFzJWu8aIRp5u/KedO8FNBfK6smImInp/ rScW2XdMKWWhi7J729J/g3XswefqJYbnhgdvljQhDfdLV/BNAVAbLhyBCebtqsZZ55 e58B4dTloriTLW8TgbT9MF7yHSFRwBzb+Krh4Wk1c/5NACEQURDIjMlohReMJIgCKK uht6Zs7Pqu0zQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Francis Laniel , Will Deacon , Sasha Levin , catalin.marinas@arm.com, broonie@kernel.org, keescook@chromium.org, geert@linux-m68k.org, christophe.leroy@csgroup.eu, mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 02/23] arm64: Do not forget syscall when starting a new thread. Date: Sun, 7 Aug 2022 21:38:09 -0400 Message-Id: <20220808013832.316381-2-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220808013832.316381-1-sashal@kernel.org> References: <20220808013832.316381-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Francis Laniel [ Upstream commit de6921856f99c11d3986c6702d851e1328d4f7f6 ] Enable tracing of the execve*() system calls with the syscalls:sys_exit_execve tracepoint by removing the call to forget_syscall() when starting a new thread and preserving the value of regs->syscallno across exec. Signed-off-by: Francis Laniel Link: https://lore.kernel.org/r/20220608162447.666494-2-flaniel@linux.microsoft.com Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/include/asm/processor.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 5623685c7d13..65834b84f0e1 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -184,8 +184,9 @@ void tls_preserve_current_state(void); static inline void start_thread_common(struct pt_regs *regs, unsigned long pc) { + s32 previous_syscall = regs->syscallno; memset(regs, 0, sizeof(*regs)); - forget_syscall(regs); + regs->syscallno = previous_syscall; regs->pc = pc; if (system_uses_irq_prio_masking()) -- 2.35.1