From: Oleg Nesterov <oleg@redhat.com>
To: Gregory Price <gourry.memverge@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
avagin@gmail.com, peterz@infradead.org, luto@kernel.org,
krisman@collabora.com, tglx@linutronix.de, corbet@lwn.net,
shuah@kernel.org, Gregory Price <gregory.price@memverge.com>
Subject: Re: [PATCH v6 1/2] ptrace,syscall_user_dispatch: Implement Syscall User Dispatch Suspension
Date: Thu, 26 Jan 2023 01:30:08 +0100 [thread overview]
Message-ID: <20230126003008.GA31684@redhat.com> (raw)
In-Reply-To: <20230125025126.787431-2-gregory.price@memverge.com>
On 01/24, Gregory Price wrote:
>
> Adds PTRACE_O_SUSPEND_SYSCALL_USER_DISPATCH to ptrace options, and
> modify Syscall User Dispatch to suspend interception when enabled.
>
> This is modeled after the SUSPEND_SECCOMP feature, which suspends
> SECCOMP interposition. Without doing this, software like CRIU will
> inject system calls into a process and be intercepted by Syscall
> User Dispatch, either causing a crash (due to blocked signals) or
> the delivery of those signals to a ptracer (not the intended behavior).
Cough... Gregory, I am sorry ;)
but can't we drop this patch to ?
CRIU needs to do PTRACE_SET_SYSCALL_USER_DISPATCH_CONFIG and check
config->mode anyway as we discussed.
Then it can simply set *config->selector = SYSCALL_DISPATCH_FILTER_ALLOW
with the same effect, no?
Oleg.
next prev parent reply other threads:[~2023-01-26 0:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-25 2:51 [PATCH v6 0/2] Gregory Price
2023-01-25 2:51 ` [PATCH v6 1/2] ptrace,syscall_user_dispatch: Implement Syscall User Dispatch Suspension Gregory Price
2023-01-26 0:30 ` Oleg Nesterov [this message]
2023-01-26 1:30 ` Gregory Price
2023-01-26 4:43 ` Gregory Price
[not found] ` <CANaxB-xn0wW5xA_CT7bA5=jig+td__EDKPBWSpZdfgMgVOezCg@mail.gmail.com>
2023-01-26 5:26 ` Gregory Price
2023-01-26 15:10 ` Oleg Nesterov
2023-01-26 18:09 ` Andrei Vagin
2023-01-26 15:07 ` Oleg Nesterov
2023-01-26 17:45 ` Andrei Vagin
2023-01-26 17:52 ` Gregory Price
2023-01-26 18:30 ` Andrei Vagin
2023-01-26 18:30 ` Oleg Nesterov
2023-01-26 18:46 ` Gregory Price
2023-01-26 18:53 ` Andrei Vagin
2023-01-26 19:01 ` Gregory Price
2023-01-25 2:51 ` [PATCH v6 2/2] ptrace,syscall_user_dispatch: add a getter/setter for sud configuration Gregory Price
2023-01-25 7:14 ` kernel test robot
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