From: Andreas Schwab <schwab@linux-m68k.org>
To: Deepak Gupta <debug@rivosinc.com>
Cc: "Deepak Gupta via B4 Relay"
<devnull+debug.rivosinc.com@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Conor Dooley" <conor@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Christian Brauner" <brauner@kernel.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Oleg Nesterov" <oleg@redhat.com>,
"Eric Biederman" <ebiederm@xmission.com>,
"Kees Cook" <kees@kernel.org>, "Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <shuah@kernel.org>, "Jann Horn" <jannh@google.com>,
"Conor Dooley" <conor+dt@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"Trevor Gross" <tmgross@umich.edu>,
"Benno Lossin" <lossin@kernel.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, linux-riscv@lists.infradead.org,
devicetree@vger.kernel.org, linux-arch@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org,
alistair.francis@wdc.com, richard.henderson@linaro.org,
jim.shu@sifive.com, andybnac@gmail.com, kito.cheng@sifive.com,
charlie@rivosinc.com, atishp@rivosinc.com, evan@rivosinc.com,
cleger@rivosinc.com, alexghiti@rivosinc.com,
samitolvanen@google.com, broonie@kernel.org,
rick.p.edgecombe@intel.com, rust-for-linux@vger.kernel.org,
"Zong Li" <zong.li@sifive.com>
Subject: Re: [PATCH v23 06/28] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE
Date: Sat, 30 May 2026 23:47:36 +0200 [thread overview]
Message-ID: <875x44o9hj.fsf@igel.home> (raw)
In-Reply-To: <CAKC1njS=AHu6uHrH4ae8VxcdEbhgiPXYCAoN3F_mnppBd3SwOA@mail.gmail.com> (Deepak Gupta's message of "Sat, 30 May 2026 12:40:33 -0700")
On Mai 30 2026, Deepak Gupta wrote:
> I see two ways forward:
>
> - It can be done in generic way where incoming PROT_WRITE means
> PROT_READ | PROT_WRITE irrespective of RISC-V. Although others
> (x86, arm, etc) would have to weigh in.
>
> OR
>
> - mmap04 LTP test can be updated to expect either of "rw-p" or "-w-p"
> whenever only PROT_WRITE was specified.
OR
- Add a new PROT_ flag.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
WARNING: multiple messages have this Message-ID (diff)
From: Andreas Schwab <schwab@linux-m68k.org>
To: Deepak Gupta <debug@rivosinc.com>
Cc: "Deepak Gupta via B4 Relay"
<devnull+debug.rivosinc.com@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Conor Dooley" <conor@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Christian Brauner" <brauner@kernel.org>,
"Peter Zijlstra" <peterz@infradead.org>,
"Oleg Nesterov" <oleg@redhat.com>,
"Eric Biederman" <ebiederm@xmission.com>,
"Kees Cook" <kees@kernel.org>, "Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <shuah@kernel.org>, "Jann Horn" <jannh@google.com>,
"Conor Dooley" <conor+dt@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Alice Ryhl" <aliceryhl@google.com>,
"Trevor Gross" <tmgross@umich.edu>,
"Benno Lossin" <lossin@kernel.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-mm@kvack.org, linux-riscv@lists.infradead.org,
devicetree@vger.kernel.org, linux-arch@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org,
alistair.francis@wdc.com, richard.henderson@linaro.org,
jim.shu@sifive.com, andybnac@gmail.com, kito.cheng@sifive.com,
charlie@rivosinc.com, atishp@rivosinc.com, evan@rivosinc.com,
cleger@rivosinc.com, alexghiti@rivosinc.com,
samitolvanen@google.com, broonie@kernel.org,
rick.p.edgecombe@intel.com, rust-for-linux@vger.kernel.org,
"Zong Li" <zong.li@sifive.com>
Subject: Re: [PATCH v23 06/28] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE
Date: Sat, 30 May 2026 23:47:36 +0200 [thread overview]
Message-ID: <875x44o9hj.fsf@igel.home> (raw)
In-Reply-To: <CAKC1njS=AHu6uHrH4ae8VxcdEbhgiPXYCAoN3F_mnppBd3SwOA@mail.gmail.com> (Deepak Gupta's message of "Sat, 30 May 2026 12:40:33 -0700")
On Mai 30 2026, Deepak Gupta wrote:
> I see two ways forward:
>
> - It can be done in generic way where incoming PROT_WRITE means
> PROT_READ | PROT_WRITE irrespective of RISC-V. Although others
> (x86, arm, etc) would have to weigh in.
>
> OR
>
> - mmap04 LTP test can be updated to expect either of "rw-p" or "-w-p"
> whenever only PROT_WRITE was specified.
OR
- Add a new PROT_ flag.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
_______________________________________________
linux-riscv mailing list
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next prev parent reply other threads:[~2026-05-30 21:47 UTC|newest]
Thread overview: 156+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-13 0:42 [PATCH v23 00/28] riscv control-flow integrity for usermode Deepak Gupta
2025-11-13 0:42 ` Deepak Gupta via B4 Relay
2025-11-13 0:42 ` Deepak Gupta via B4 Relay
2025-11-13 0:42 ` [PATCH v23 01/28] mm: VM_SHADOW_STACK definition for riscv Deepak Gupta
2025-11-13 0:42 ` Deepak Gupta via B4 Relay
2025-11-13 0:42 ` Deepak Gupta via B4 Relay
2025-12-04 14:14 ` Andreas Korb
2025-12-04 14:14 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 02/28] dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml) Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` [PATCH v23 03/28] riscv: zicfiss / zicfilp enumeration Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:36 ` Andreas Korb
2025-12-04 14:36 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 04/28] riscv: zicfiss / zicfilp extension csr and bit definitions Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:37 ` Andreas Korb
2025-12-04 14:37 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 05/28] riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` [PATCH v23 06/28] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:41 ` Andreas Korb
2025-12-04 14:41 ` Andreas Korb
2026-05-30 15:02 ` Andreas Schwab
2026-05-30 15:02 ` Andreas Schwab
2026-05-30 19:40 ` Deepak Gupta
2026-05-30 19:40 ` Deepak Gupta
2026-05-30 21:47 ` Andreas Schwab [this message]
2026-05-30 21:47 ` Andreas Schwab
2026-06-01 16:22 ` Deepak Gupta
2026-06-01 16:22 ` Deepak Gupta
2026-06-01 17:10 ` Andreas Schwab
2026-06-01 17:10 ` Andreas Schwab
2026-06-01 17:57 ` Deepak Gupta
2026-06-01 17:57 ` Deepak Gupta
2026-06-01 20:58 ` Andreas Schwab
2026-06-01 20:58 ` Andreas Schwab
2026-06-02 10:23 ` Eric W. Biederman
2026-06-02 10:23 ` Eric W. Biederman
2026-06-02 16:19 ` Deepak Gupta
2026-06-02 16:19 ` Deepak Gupta
2025-11-13 0:43 ` [PATCH v23 07/28] riscv/mm: manufacture shadow stack pte Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:41 ` Andreas Korb
2025-12-04 14:41 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 08/28] riscv/mm: teach pte_mkwrite to manufacture shadow stack PTEs Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:43 ` Andreas Korb
2025-12-04 14:43 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 09/28] riscv/mm: write protect and shadow stack Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:45 ` Andreas Korb
2025-12-04 14:45 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 10/28] riscv/mm: Implement map_shadow_stack() syscall Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:46 ` Andreas Korb
2025-12-04 14:46 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 11/28] riscv/shstk: If needed allocate a new shadow stack on clone Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` [PATCH v23 12/28] riscv: Implements arch agnostic shadow stack prctls Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:47 ` Andreas Korb
2025-12-04 14:47 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 13/28] prctl: arch-agnostic prctl for indirect branch tracking Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:48 ` Andreas Korb
2025-12-04 14:48 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 14/28] riscv: Implements arch agnostic indirect branch tracking prctls Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:48 ` Andreas Korb
2025-12-04 14:48 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 15/28] riscv/traps: Introduce software check exception and uprobe handling Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:53 ` Andreas Korb
2025-12-04 14:53 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 16/28] riscv: signal: abstract header saving for setup_sigcontext Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 14:56 ` Andreas Korb
2025-12-04 14:56 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 17/28] riscv/signal: save and restore of shadow stack for signal Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` [PATCH v23 18/28] riscv/kernel: update __show_regs to print shadow stack register Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 15:00 ` [PATCH v23 16/28] riscv: signal: abstract header saving for setup_sigcontext[PATCH " Andreas Korb
2025-12-04 15:00 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 19/28] riscv/ptrace: riscv cfi status and state via ptrace and in core files Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` [PATCH v23 20/28] riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` [PATCH v23 21/28] riscv: kernel command line option to opt out of user cfi Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-19 16:24 ` Paul Walmsley
2025-11-19 16:24 ` Paul Walmsley
2025-11-13 0:43 ` [PATCH v23 22/28] riscv: enable kernel access to shadow stack memory via FWFT sbi call Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 15:02 ` Andreas Korb
2025-12-04 15:02 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 23/28] arch/riscv: compile vdso with landing pad and shadow stack note Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 15:02 ` Andreas Korb
2025-12-04 15:02 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 24/28] arch/riscv: dual vdso creation logic and select vdso based on hw Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-12-04 15:04 ` Andreas Korb
2025-12-04 15:04 ` Andreas Korb
2025-12-04 16:56 ` Thomas Weißschuh
2025-12-04 16:56 ` Thomas Weißschuh
2025-12-04 17:18 ` Charles Mirabile
2025-12-04 17:18 ` Charles Mirabile
2025-11-13 0:43 ` [PATCH v23 25/28] riscv: create a config for shadow stack and landing pad instr support Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-17 8:24 ` kernel test robot
2025-12-04 15:04 ` Andreas Korb
2025-12-04 15:04 ` Andreas Korb
2025-11-13 0:43 ` [PATCH v23 26/28] riscv: Documentation for landing pad / indirect branch tracking Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` [PATCH v23 27/28] riscv: Documentation for shadow stack on riscv Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` [PATCH v23 28/28] kselftest/riscv: kselftest for user mode cfi Deepak Gupta
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-13 0:43 ` Deepak Gupta via B4 Relay
2025-11-19 16:40 ` [PATCH v23 00/28] riscv control-flow integrity for usermode patchwork-bot+linux-riscv
2025-11-19 16:40 ` patchwork-bot+linux-riscv
2025-11-27 8:30 ` patchwork-bot+linux-riscv
2025-11-27 8:30 ` patchwork-bot+linux-riscv
2025-11-27 21:14 ` Paul Walmsley
2025-11-27 21:14 ` Paul Walmsley
2025-12-03 16:31 ` Valentin Haudiquet
2025-12-03 16:31 ` Valentin Haudiquet
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