From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>,
"James E.J. Bottomley" <jejb@parisc-linux.org>,
Helge Deller <deller@gmx.de>,
linux-parisc@vger.kernel.org, Andy Lutomirski <luto@kernel.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Chris Metcalf <cmetcalf@mellanox.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
James Hogan <james.hogan@imgtec.com>,
Jeff Dike <jdike@addtoit.com>,
linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org,
linux-s390@vger.kernel.org,
"Maciej W. Rozycki" <macro@imgtec.com>,
Mark Rutland <mark.rutland@arm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Paul Mackerras <paulus@samba.org>,
Ralf Baechle <ralf@linux-mips.org>,
Richard Weinberger <richard@nod.at>,
Russell King <linux@armlinux.org.uk>,
user-mode-linux-devel@lists.sourceforge.net,
Will Deacon <will.deacon@arm.com>,
x86@kernel.org
Subject: [PATCH 10/14] parisc/ptrace: run seccomp after ptrace
Date: Thu, 9 Jun 2016 14:02:00 -0700 [thread overview]
Message-ID: <1465506124-21866-11-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1465506124-21866-1-git-send-email-keescook@chromium.org>
Close the hole where ptrace can change a syscall out from under seccomp.
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
---
arch/parisc/kernel/ptrace.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c
index 8edc47c0b98e..e02d7b4d2b69 100644
--- a/arch/parisc/kernel/ptrace.c
+++ b/arch/parisc/kernel/ptrace.c
@@ -311,10 +311,6 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
long do_syscall_trace_enter(struct pt_regs *regs)
{
- /* Do the secure computing check first. */
- if (secure_computing(NULL) == -1)
- return -1;
-
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(regs)) {
/*
@@ -325,6 +321,11 @@ long do_syscall_trace_enter(struct pt_regs *regs)
regs->gr[20] = -1UL;
goto out;
}
+
+ /* Do the secure computing check after ptrace. */
+ if (secure_computing(NULL) == -1)
+ return -1;
+
#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->gr[20]);
--
2.7.4
next prev parent reply other threads:[~2016-06-09 21:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-09 21:01 [PATCH 00/14] run seccomp after ptrace Kees Cook
2016-06-09 21:01 ` [PATCH 01/14] seccomp: add tests for ptrace hole Kees Cook
2016-06-09 21:01 ` [PATCH 02/14] seccomp: Add a seccomp_data parameter secure_computing() Kees Cook
2016-06-09 21:01 ` [PATCH 03/14] x86/entry: Get rid of two-phase syscall entry work Kees Cook
2016-06-09 21:01 ` [PATCH 04/14] seccomp: remove 2-phase API Kees Cook
2016-06-09 21:01 ` [PATCH 05/14] seccomp: recheck the syscall after RET_TRACE Kees Cook
2016-06-09 22:46 ` Andy Lutomirski
2016-06-09 21:01 ` [PATCH 06/14] x86/ptrace: run seccomp after ptrace Kees Cook
2016-06-09 22:52 ` Andy Lutomirski
2016-06-10 2:01 ` Kees Cook
2016-06-14 2:27 ` Andy Lutomirski
2016-06-09 21:01 ` [PATCH 07/14] arm/ptrace: " Kees Cook
2016-06-09 21:01 ` [PATCH 08/14] arm64/ptrace: " Kees Cook
2016-06-09 21:01 ` [PATCH 09/14] MIPS/ptrace: " Kees Cook
2016-06-09 21:02 ` Kees Cook [this message]
2016-06-09 21:02 ` [PATCH 11/14] s390/ptrace: " Kees Cook
2016-06-10 10:51 ` Martin Schwidefsky
2016-06-09 21:02 ` [PATCH 12/14] powerpc/ptrace: " Kees Cook
2016-06-09 21:02 ` [PATCH 13/14] tile/ptrace: " Kees Cook
2016-06-09 21:02 ` [PATCH 14/14] um/ptrace: " Kees Cook
2016-06-13 20:50 ` [PATCH 00/14] " Kees Cook
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