[PATCH v8 2/5] arm64: Tighten the PR_{SET,GET}_TAGGED_ADDR_CTRL prctl() unused arguments

All of lore.kernel.org
 help / color / mirror / Atom feed

From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Andrey Konovalov <andreyknvl@google.com>,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	Kevin Brodsky <kevin.brodsky@arm.com>,
	Dave P Martin <Dave.Martin@arm.com>,
	Dave Hansen <dave.hansen@intel.com>,
	linux-doc@vger.kernel.org, linux-arch@vger.kernel.org
Subject: [PATCH v8 2/5] arm64: Tighten the PR_{SET,GET}_TAGGED_ADDR_CTRL prctl() unused arguments
Date: Thu, 15 Aug 2019 16:44:00 +0100	[thread overview]
Message-ID: <20190815154403.16473-3-catalin.marinas@arm.com> (raw)
In-Reply-To: <20190815154403.16473-1-catalin.marinas@arm.com>

Require that arg{3,4,5} of the PR_{SET,GET}_TAGGED_ADDR_CTRL prctl and
arg2 of the PR_GET_TAGGED_ADDR_CTRL prctl() are zero rather than ignored
for future extensions.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 kernel/sys.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/sys.c b/kernel/sys.c
index c6c4d5358bd3..ec48396b4943 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2499,9 +2499,13 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
 		error = PAC_RESET_KEYS(me, arg2);
 		break;
 	case PR_SET_TAGGED_ADDR_CTRL:
+		if (arg3 || arg4 || arg5)
+			return -EINVAL;
 		error = SET_TAGGED_ADDR_CTRL(arg2);
 		break;
 	case PR_GET_TAGGED_ADDR_CTRL:
+		if (arg2 || arg3 || arg4 || arg5)
+			return -EINVAL;
 		error = GET_TAGGED_ADDR_CTRL();
 		break;
 	default:

WARNING: multiple messages have this Message-ID (diff)

From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org
Cc: linux-arch@vger.kernel.org, linux-doc@vger.kernel.org,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	Andrey Konovalov <andreyknvl@google.com>,
	Kevin Brodsky <kevin.brodsky@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Dave P Martin <Dave.Martin@arm.com>
Subject: [PATCH v8 2/5] arm64: Tighten the PR_{SET, GET}_TAGGED_ADDR_CTRL prctl() unused arguments
Date: Thu, 15 Aug 2019 16:44:00 +0100	[thread overview]
Message-ID: <20190815154403.16473-3-catalin.marinas@arm.com> (raw)
In-Reply-To: <20190815154403.16473-1-catalin.marinas@arm.com>

Require that arg{3,4,5} of the PR_{SET,GET}_TAGGED_ADDR_CTRL prctl and
arg2 of the PR_GET_TAGGED_ADDR_CTRL prctl() are zero rather than ignored
for future extensions.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 kernel/sys.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/sys.c b/kernel/sys.c
index c6c4d5358bd3..ec48396b4943 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2499,9 +2499,13 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
 		error = PAC_RESET_KEYS(me, arg2);
 		break;
 	case PR_SET_TAGGED_ADDR_CTRL:
+		if (arg3 || arg4 || arg5)
+			return -EINVAL;
 		error = SET_TAGGED_ADDR_CTRL(arg2);
 		break;
 	case PR_GET_TAGGED_ADDR_CTRL:
+		if (arg2 || arg3 || arg4 || arg5)
+			return -EINVAL;
 		error = GET_TAGGED_ADDR_CTRL();
 		break;
 	default:

WARNING: multiple messages have this Message-ID (diff)

From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org
Cc: linux-arch@vger.kernel.org, linux-doc@vger.kernel.org,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	Andrey Konovalov <andreyknvl@google.com>,
	Kevin Brodsky <kevin.brodsky@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Dave Hansen <dave.hansen@intel.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Dave P Martin <Dave.Martin@arm.com>
Subject: [PATCH v8 2/5] arm64: Tighten the PR_{SET, GET}_TAGGED_ADDR_CTRL prctl() unused arguments
Date: Thu, 15 Aug 2019 16:44:00 +0100	[thread overview]
Message-ID: <20190815154403.16473-3-catalin.marinas@arm.com> (raw)
In-Reply-To: <20190815154403.16473-1-catalin.marinas@arm.com>

Require that arg{3,4,5} of the PR_{SET,GET}_TAGGED_ADDR_CTRL prctl and
arg2 of the PR_GET_TAGGED_ADDR_CTRL prctl() are zero rather than ignored
for future extensions.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 kernel/sys.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/sys.c b/kernel/sys.c
index c6c4d5358bd3..ec48396b4943 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2499,9 +2499,13 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
 		error = PAC_RESET_KEYS(me, arg2);
 		break;
 	case PR_SET_TAGGED_ADDR_CTRL:
+		if (arg3 || arg4 || arg5)
+			return -EINVAL;
 		error = SET_TAGGED_ADDR_CTRL(arg2);
 		break;
 	case PR_GET_TAGGED_ADDR_CTRL:
+		if (arg2 || arg3 || arg4 || arg5)
+			return -EINVAL;
 		error = GET_TAGGED_ADDR_CTRL();
 		break;
 	default:

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

next prev parent reply	other threads:[~2019-08-15 15:44 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-15 15:43 [PATCH v8 0/2] arm64 tagged address ABI Catalin Marinas
2019-08-15 15:43 ` Catalin Marinas
2019-08-15 15:43 ` Catalin Marinas
2019-08-15 15:43 ` [PATCH v8 1/5] mm: untag user pointers in mmap/munmap/mremap/brk Catalin Marinas
2019-08-15 15:43   ` Catalin Marinas
2019-08-15 15:43   ` Catalin Marinas
2019-08-19 15:45   ` Andrey Konovalov
2019-08-19 15:45     ` Andrey Konovalov
2019-08-19 15:45     ` Andrey Konovalov
2019-08-19 15:45     ` Andrey Konovalov
2019-08-19 16:28   ` Will Deacon
2019-08-19 16:28     ` Will Deacon
2019-08-19 16:28     ` Will Deacon
2019-08-22 23:41     ` Andrew Morton
2019-08-22 23:41       ` Andrew Morton
2019-08-22 23:41       ` Andrew Morton
2019-08-23 15:01       ` Will Deacon
2019-08-23 15:01         ` Will Deacon
2019-08-23 15:01         ` Will Deacon
2019-08-15 15:44 ` Catalin Marinas [this message]
2019-08-15 15:44   ` [PATCH v8 2/5] arm64: Tighten the PR_{SET, GET}_TAGGED_ADDR_CTRL prctl() unused arguments Catalin Marinas
2019-08-15 15:44   ` Catalin Marinas
2019-08-19 15:46   ` [PATCH v8 2/5] arm64: Tighten the PR_{SET,GET}_TAGGED_ADDR_CTRL " Andrey Konovalov
2019-08-19 15:46     ` Andrey Konovalov
2019-08-19 15:46     ` Andrey Konovalov
2019-08-19 15:46     ` Andrey Konovalov
2019-08-15 15:44 ` [PATCH v8 3/5] arm64: Change the tagged_addr sysctl control semantics to only prevent the opt-in Catalin Marinas
2019-08-15 15:44   ` Catalin Marinas
2019-08-15 15:44   ` Catalin Marinas
2019-08-19 15:47   ` Andrey Konovalov
2019-08-19 15:47     ` Andrey Konovalov
2019-08-19 15:47     ` Andrey Konovalov
2019-08-19 15:47     ` Andrey Konovalov
2019-08-15 15:44 ` [PATCH v8 4/5] arm64: Define Documentation/arm64/tagged-address-abi.rst Catalin Marinas
2019-08-15 15:44   ` Catalin Marinas
2019-08-15 15:44   ` Catalin Marinas
2019-08-15 16:54   ` Kevin Brodsky
2019-08-15 16:54     ` Kevin Brodsky
2019-08-15 16:54     ` Kevin Brodsky
2019-08-19 15:50   ` Andrey Konovalov
2019-08-19 15:50     ` Andrey Konovalov
2019-08-19 15:50     ` Andrey Konovalov
2019-08-19 15:50     ` Andrey Konovalov
2019-08-19 16:25   ` Will Deacon
2019-08-19 16:25     ` Will Deacon
2019-08-19 16:25     ` Will Deacon
2019-08-15 15:44 ` [PATCH v8 5/5] arm64: Relax Documentation/arm64/tagged-pointers.rst Catalin Marinas
2019-08-15 15:44   ` Catalin Marinas
2019-08-15 15:44   ` Catalin Marinas
2019-08-19 15:48   ` Andrey Konovalov
2019-08-19 15:48     ` Andrey Konovalov
2019-08-19 15:48     ` Andrey Konovalov
2019-08-19 15:48     ` Andrey Konovalov

find likely ancestor, descendant, or conflicting patches for this message:
dfblob:c6c4d5358bd dfblob:c6c4d5358bd dfblob:c6c4d5358bd
dfblob:ec48396b494 dfblob:ec48396b494 dfblob:ec48396b494
	(help)

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190815154403.16473-3-catalin.marinas@arm.com \
    --to=catalin.marinas@arm.com \
    --cc=Dave.Martin@arm.com \
    --cc=akpm@linux-foundation.org \
    --cc=andreyknvl@google.com \
    --cc=dave.hansen@intel.com \
    --cc=kevin.brodsky@arm.com \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=szabolcs.nagy@arm.com \
    --cc=vincenzo.frascino@arm.com \
    --cc=will.deacon@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Be sure your reply has a Subject: header at the top and a blank line before the message body.

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.