From: Oleg Nesterov <oleg@redhat.com>
To: Renzo Davoli <renzo@cs.unibo.it>
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Shuah Khan <shuah@kernel.org>, Alexey Gladkov <legion@kernel.org>,
Eugene Syromyatnikov <evgsyr@gmail.com>,
Davide Berardi <berardi.dav@gmail.com>,
strace-devel@lists.strace.io, "Dmitry V . Levin" <ldv@strace.io>
Subject: Re: [PATCH v2 1/5] ptrace: PTRACE_SET_SYSCALL_INFO syscall skipping support
Date: Fri, 3 Jul 2026 12:58:41 +0200 [thread overview]
Message-ID: <akeV4WhliQLZ6YHb@redhat.com> (raw)
In-Reply-To: <20260703105027.539399-2-renzo@cs.unibo.it>
On 07/03, Renzo Davoli wrote:
>
> This patch extends PTRACE_SET_SYSCALL_INFO with support for skipping a system
> call triggered via seccomp.
>
> When the tracer retrieves a ptrace_syscall_info structure with
> op == PTRACE_SYSCALL_INFO_SECCOMP,
... or PTRACE_SYSCALL_INFO_ENTRY
> - /* Changing the type of the system call stop is not supported yet. */
> - if (ptrace_get_syscall_info_op(child) != info.op)
> - return -EINVAL;
> + /*
> + * Changing the type of the system call stop is
> + * not allowed, with the following exception:
> + * PTRACE_SYSCALL_INFO_SECCOMP can be changed to
> + * PTRACE_SYSCALL_INFO_EXIT to skip the system call
> + */
ditto
Oleg.
next prev parent reply other threads:[~2026-07-03 10:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-03 10:50 [PATCH v2 0/5] ptrace_set_syscall_info: add support for seccomp syscall skipping and instruction pointer modification Renzo Davoli
2026-07-03 10:50 ` [PATCH v2 1/5] ptrace: PTRACE_SET_SYSCALL_INFO syscall skipping support Renzo Davoli
2026-07-03 10:58 ` Oleg Nesterov [this message]
2026-07-03 11:48 ` Oleg Nesterov
2026-07-03 10:50 ` [PATCH v2 2/5] selftests/ptrace: add a test case for PTRACE_SYSCALL_INFO syscall skipping Renzo Davoli
2026-07-03 10:50 ` [PATCH v2 3/5] asm/ptrace.h: add instruction_pointer_set Renzo Davoli
2026-07-03 10:50 ` [PATCH v2 4/5] ptrace: add PTRACE_SYSCALL_INFO_FLAG_SET_IP Renzo Davoli
2026-07-03 11:04 ` Oleg Nesterov
2026-07-03 15:01 ` Renzo Davoli
2026-07-03 15:54 ` Oleg Nesterov
2026-07-04 9:11 ` Renzo Davoli
2026-07-03 10:50 ` [PATCH v2 5/5] selftests/ptrace: add a test case for PTRACE_SYSCALL_INFO_FLAG_SET_IP Renzo Davoli
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