From: Thomas Gleixner <tglx@linutronix.de>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@amacapital.net>,
Roland McGrath <roland@hack.frob.com>,
Oleg Nesterov <oleg@redhat.com>,
linux-arch@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Dominik Brodowski <linux@dominikbrodowski.net>,
Andy Lutomirski <luto@kernel.org>,
Kees Cook <keescook@chromium.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
"Dmitry V. Levin" <ldv@altlinux.org>,
Palmer Dabbelt <palmer@sifive.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
Al Viro <viro@zeniv.linux.org.uk>,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 1/6 v3] ptrace: Remove maxargs from task_current_syscall()
Date: Thu, 4 Apr 2019 09:52:11 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.21.1904040951200.1833@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20190401134420.601152379@goodmis.org>
On Mon, 1 Apr 2019, Steven Rostedt wrote:
> From: "Steven Rostedt (Red Hat)" <rostedt@goodmis.org>
>
> task_current_syscall() has a single user that passes in 6 for maxargs, which
> is the maximum arguments that can be used to get system calls from
> syscall_get_arguments(). Instead of passing in a number of arguments to
> grab, just get 6 arguments. The args argument even specifies that it's an
> array of 6 items.
>
> This will also allow changing syscall_get_arguments() to not get a variable
> number of arguments, but always grab 6.
>
> Linus also suggested not passing in a bunch of arguments to
> task_current_syscall() but to instead pass in a pointer to a structure, and
> just fill the structure. struct seccomp_data has almost all the parameters
> that is needed except for the stack pointer (sp). As seccomp_data is part of
> uapi, and I'm afraid to change it, a new structure was created
> "syscall_info", which includes seccomp_data and adds the "sp" field.
>
> Link: http://lkml.kernel.org/r/20161107213233.466776454@goodmis.org
>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Andy Lutomirski <luto@kernel.org>
> Cc: Alexey Dobriyan <adobriyan@gmail.com>
> Cc: Oleg Nesterov <oleg@redhat.com>
> Cc: Kees Cook <keescook@chromium.org>
> Cc: Al Viro <viro@zeniv.linux.org.uk>
> Cc: linux-fsdevel@vger.kernel.org
> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
next prev parent reply other threads:[~2019-04-04 7:53 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-01 13:41 [PATCH 0/6 v3] sycalls: Remove args i and n from syscall_get_arguments() Steven Rostedt
2019-04-01 13:41 ` [PATCH 1/6 v3] ptrace: Remove maxargs from task_current_syscall() Steven Rostedt
2019-04-04 7:52 ` Thomas Gleixner [this message]
2019-04-01 13:41 ` [PATCH 2/6 v3] tracing/syscalls: Pass in hardcoded 6 into syscall_get_arguments() Steven Rostedt
2019-04-01 13:41 ` [PATCH 3/6 v3] riscv: Fix syscall_get_arguments() and syscall_set_arguments() Steven Rostedt
2019-04-04 14:02 ` Dmitry V. Levin
2019-04-04 14:26 ` Steven Rostedt
2019-04-04 23:29 ` Palmer Dabbelt
2019-04-01 13:41 ` [PATCH 4/6 v3] csky: " Steven Rostedt
2019-04-04 14:02 ` Dmitry V. Levin
2019-04-04 14:28 ` Steven Rostedt
2019-04-01 13:41 ` [PATCH 5/6 v3] syscalls: Remove start and number from syscall_get_arguments() args Steven Rostedt
2019-04-04 7:52 ` Thomas Gleixner
2019-04-04 18:17 ` Dmitry V. Levin
2019-04-04 21:06 ` Steven Rostedt
2019-04-04 18:56 ` Max Filippov
2019-04-01 13:41 ` [PATCH 6/6 v3] syscalls: Remove start and number from syscall_set_arguments() args Steven Rostedt
2019-04-04 7:53 ` Thomas Gleixner
2019-04-04 18:18 ` Dmitry V. Levin
2019-04-04 18:55 ` Max Filippov
2019-04-04 13:28 ` [PATCH 0/6 v3] sycalls: Remove args i and n from syscall_get_arguments() Steven Rostedt
2019-04-05 1:24 ` Linus Torvalds
2019-04-05 14:07 ` Steven Rostedt
2019-04-05 8:58 ` Will Deacon
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