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Tue, 28 Jan 2025 10:03:35 -0500 X-MC-Unique: zthpiRmcML2MbERzCpKDPA-1 X-Mimecast-MFC-AGG-ID: zthpiRmcML2MbERzCpKDPA Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id ECDBF18009C5; Tue, 28 Jan 2025 15:03:32 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.45.226.70]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with SMTP id D6A621800352; Tue, 28 Jan 2025 15:03:27 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Tue, 28 Jan 2025 16:03:06 +0100 (CET) Date: Tue, 28 Jan 2025 16:03:00 +0100 From: Oleg Nesterov To: Kees Cook , Andy Lutomirski , Will Drewry , Thomas Bogendoerfer Cc: Linus Walleij , Madhavan Srinivasan , Michael Ellerman , Thomas Gleixner , Peter Zijlstra , linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 1/4] seccomp/mips: change syscall_trace_enter() to use secure_computing() Message-ID: <20250128150300.GA15318@redhat.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250128150228.GA15298@redhat.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 arch/mips/Kconfig selects HAVE_ARCH_SECCOMP_FILTER so syscall_trace_enter() can just use __secure_computing(NULL) and rely on populate_seccomp_data(sd) and "sd == NULL" checks in __secure_computing(sd) paths. With the change above syscall_trace_enter() can just use secure_computing() and avoid #ifdef + test_thread_flag(TIF_SECCOMP). CONFIG_GENERIC_ENTRY is not defined, so test_syscall_work(SECCOMP) will check TIF_SECCOMP. Signed-off-by: Oleg Nesterov Acked-by: Thomas Bogendoerfer Reviewed-by: Kees Cook --- arch/mips/kernel/ptrace.c | 20 ++------------------ 1 file changed, 2 insertions(+), 18 deletions(-) diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c index 61503a36067e..f7107479c7fa 100644 --- a/arch/mips/kernel/ptrace.c +++ b/arch/mips/kernel/ptrace.c @@ -1326,24 +1326,8 @@ asmlinkage long syscall_trace_enter(struct pt_regs *regs) return -1; } -#ifdef CONFIG_SECCOMP - if (unlikely(test_thread_flag(TIF_SECCOMP))) { - int ret, i; - struct seccomp_data sd; - unsigned long args[6]; - - sd.nr = current_thread_info()->syscall; - sd.arch = syscall_get_arch(current); - syscall_get_arguments(current, regs, args); - for (i = 0; i < 6; i++) - sd.args[i] = args[i]; - sd.instruction_pointer = KSTK_EIP(current); - - ret = __secure_computing(&sd); - if (ret == -1) - return ret; - } -#endif + if (secure_computing()) + return -1; if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT))) trace_sys_enter(regs, regs->regs[2]); -- 2.25.1.362.g51ebf55