From: Peter Zijlstra <peterz@infradead.org>
To: Gabriel Krisman Bertazi <krisman@collabora.com>
Cc: luto@kernel.org, tglx@linutronix.de, keescook@chromium.org,
christian.brauner@ubuntu.com, willy@infradead.org,
shuah@kernel.org, linux-kernel@vger.kernel.org,
linux-api@vger.kernel.org, linux-kselftest@vger.kernel.org,
x86@kernel.org, gofmanp@gmail.com, kernel@collabora.com
Subject: Re: [PATCH v7 3/7] kernel: Implement selective syscall userspace redirection
Date: Thu, 19 Nov 2020 13:36:02 +0100 [thread overview]
Message-ID: <20201119123602.GK3121392@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20201118032840.3429268-4-krisman@collabora.com>
On Tue, Nov 17, 2020 at 10:28:36PM -0500, Gabriel Krisman Bertazi wrote:
> prctl(PR_SET_SYSCALL_USER_DISPATCH, <op>, <off>, <length>, [selector])
>
> The range [<offset>,<offset>+len] is a part of the process memory map
> + if (likely(instruction_pointer(regs) - sd->offset < sd->len))
> + return false;
The actual implementation ^ is: [<offset>, <offset>+<length>).
Which seems consistent and right, so I would suggest simply changing the
Changelog, something that could be done when applying.
next prev parent reply other threads:[~2020-11-19 12:36 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-18 3:28 [PATCH v7 0/7] Syscall User Dispatch Gabriel Krisman Bertazi
2020-11-18 3:28 ` [PATCH v7 1/7] x86: vdso: Expose sigreturn address on vdso to the kernel Gabriel Krisman Bertazi
2020-11-18 3:28 ` [PATCH v7 2/7] signal: Expose SYS_USER_DISPATCH si_code type Gabriel Krisman Bertazi
2020-11-18 3:28 ` [PATCH v7 3/7] kernel: Implement selective syscall userspace redirection Gabriel Krisman Bertazi
2020-11-19 12:36 ` Peter Zijlstra [this message]
2020-11-19 17:43 ` Gabriel Krisman Bertazi
2020-11-21 0:18 ` Kees Cook
2020-11-22 4:01 ` Andy Lutomirski
2020-11-18 3:28 ` [PATCH v7 4/7] entry: Support Syscall User Dispatch on common syscall entry Gabriel Krisman Bertazi
2020-11-18 3:28 ` [PATCH v7 5/7] selftests: Add kselftest for syscall user dispatch Gabriel Krisman Bertazi
2020-11-18 3:28 ` [PATCH v7 6/7] selftests: Add benchmark " Gabriel Krisman Bertazi
2020-11-18 3:28 ` [PATCH v7 7/7] docs: Document Syscall User Dispatch Gabriel Krisman Bertazi
2020-11-18 8:48 ` Florian Weimer
2020-11-18 17:02 ` Gabriel Krisman Bertazi
2020-11-18 8:47 ` [PATCH v7 0/7] " Florian Weimer
2020-11-18 17:01 ` Gabriel Krisman Bertazi
2020-11-18 17:22 ` Florian Weimer
2020-11-19 12:38 ` Peter Zijlstra
2020-11-21 0:24 ` Kees Cook
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