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From: Andrey Konovalov <andreyknvl@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Andrey Konovalov <andreyknvl@google.com>,
	Kees Cook <keescook@chromium.org>,
	Kate Stewart <kstewart@linuxfoundation.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@kernel.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Shuah Khan <shuah@kernel.org>,
	linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
	linux-mm@kvack.org, linux-arch@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Dmitry Vyukov <dvyukov@google.com>,
	Kostya Serebryany <kcc@google.com>,
	Evgeniy Stepanov <eugenis@google.com>,
	Lee Smith <Lee.Smith@arm.com>,
	Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
	Jacob Bramley <Jacob.Bramley@arm.com>,
	Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
	Chintan Pandya <cpandya@codeaurora.org>
Subject: [PATCH v4 4/7] mm, arm64: untag user addresses in mm/gup.c
Date: Wed, 20 Jun 2018 17:24:23 +0200	[thread overview]
Message-ID: <1203c510e5c34e97e5940688df075d69429e94de.1529507994.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1529507994.git.andreyknvl@google.com>

mm/gup.c provides a kernel interface that accepts user addresses and
manipulates user pages directly (for example get_user_pages, that is used
by the futex syscall). Here we also need to handle the case of tagged user
pointers.

Add untagging to gup.c functions that use user pointers for vma lookup.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
 mm/gup.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/gup.c b/mm/gup.c
index b70d7ba7cc13..5bb351c91989 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -666,6 +666,8 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 	if (!nr_pages)
 		return 0;
 
+	start = untagged_addr(start);
+
 	VM_BUG_ON(!!pages != !!(gup_flags & FOLL_GET));
 
 	/*
@@ -820,6 +822,8 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
 	struct vm_area_struct *vma;
 	int ret, major = 0;
 
+	address = untagged_addr(address);
+
 	if (unlocked)
 		fault_flags |= FAULT_FLAG_ALLOW_RETRY;
 
-- 
2.18.0.rc1.244.gcf134e6275-goog


WARNING: multiple messages have this Message-ID
From: Andrey Konovalov <andreyknvl@google.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Andrey Konovalov <andreyknvl@google.com>,
	Kees Cook <keescook@chromium.org>,
	Kate Stewart <kstewart@linuxfoundation.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@kernel.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Shuah Khan <shuah@kernel.org>,
	linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
	linux-mm@kvack.org, linux-arch@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Dmitry Vyukov <dvyukov@google.com>,
	Kostya Serebryany <kcc@google.com>,
	Evgeniy Stepanov <eugenis@google.com>,
	Lee Smith <Lee.Smith@arm.com>,
	Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>,
	Jacob Bramley <Jacob.Bramley@arm.com>,
	Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>,
	Chintan Pandya <cpandya@codeaurora.org>
Subject: [PATCH v4 4/7] mm, arm64: untag user addresses in mm/gup.c
Date: Wed, 20 Jun 2018 17:24:23 +0200	[thread overview]
Message-ID: <1203c510e5c34e97e5940688df075d69429e94de.1529507994.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1529507994.git.andreyknvl@google.com>

mm/gup.c provides a kernel interface that accepts user addresses and
manipulates user pages directly (for example get_user_pages, that is used
by the futex syscall). Here we also need to handle the case of tagged user
pointers.

Add untagging to gup.c functions that use user pointers for vma lookup.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
 mm/gup.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/gup.c b/mm/gup.c
index b70d7ba7cc13..5bb351c91989 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -666,6 +666,8 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 	if (!nr_pages)
 		return 0;
 
+	start = untagged_addr(start);
+
 	VM_BUG_ON(!!pages != !!(gup_flags & FOLL_GET));
 
 	/*
@@ -820,6 +822,8 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
 	struct vm_area_struct *vma;
 	int ret, major = 0;
 
+	address = untagged_addr(address);
+
 	if (unlocked)
 		fault_flags |= FAULT_FLAG_ALLOW_RETRY;
 
-- 
2.18.0.rc1.244.gcf134e6275-goog

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WARNING: multiple messages have this Message-ID
From: andreyknvl at google.com (Andrey Konovalov)
Subject: [PATCH v4 4/7] mm, arm64: untag user addresses in mm/gup.c
Date: Wed, 20 Jun 2018 17:24:23 +0200	[thread overview]
Message-ID: <1203c510e5c34e97e5940688df075d69429e94de.1529507994.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1529507994.git.andreyknvl@google.com>

mm/gup.c provides a kernel interface that accepts user addresses and
manipulates user pages directly (for example get_user_pages, that is used
by the futex syscall). Here we also need to handle the case of tagged user
pointers.

Add untagging to gup.c functions that use user pointers for vma lookup.

Signed-off-by: Andrey Konovalov <andreyknvl at google.com>
---
 mm/gup.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/gup.c b/mm/gup.c
index b70d7ba7cc13..5bb351c91989 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -666,6 +666,8 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 	if (!nr_pages)
 		return 0;
 
+	start = untagged_addr(start);
+
 	VM_BUG_ON(!!pages != !!(gup_flags & FOLL_GET));
 
 	/*
@@ -820,6 +822,8 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
 	struct vm_area_struct *vma;
 	int ret, major = 0;
 
+	address = untagged_addr(address);
+
 	if (unlocked)
 		fault_flags |= FAULT_FLAG_ALLOW_RETRY;
 
-- 
2.18.0.rc1.244.gcf134e6275-goog

--
To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in
the body of a message to majordomo at vger.kernel.org
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WARNING: multiple messages have this Message-ID
From: andreyknvl@google.com (Andrey Konovalov)
Subject: [PATCH v4 4/7] mm, arm64: untag user addresses in mm/gup.c
Date: Wed, 20 Jun 2018 17:24:23 +0200	[thread overview]
Message-ID: <1203c510e5c34e97e5940688df075d69429e94de.1529507994.git.andreyknvl@google.com> (raw)
Message-ID: <20180620152423.VTJEvkoODsQf5R1EFvR9_JeiJWkT0nh43-kACOicGLo@z> (raw)
In-Reply-To: <cover.1529507994.git.andreyknvl@google.com>

mm/gup.c provides a kernel interface that accepts user addresses and
manipulates user pages directly (for example get_user_pages, that is used
by the futex syscall). Here we also need to handle the case of tagged user
pointers.

Add untagging to gup.c functions that use user pointers for vma lookup.

Signed-off-by: Andrey Konovalov <andreyknvl at google.com>
---
 mm/gup.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/gup.c b/mm/gup.c
index b70d7ba7cc13..5bb351c91989 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -666,6 +666,8 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 	if (!nr_pages)
 		return 0;
 
+	start = untagged_addr(start);
+
 	VM_BUG_ON(!!pages != !!(gup_flags & FOLL_GET));
 
 	/*
@@ -820,6 +822,8 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
 	struct vm_area_struct *vma;
 	int ret, major = 0;
 
+	address = untagged_addr(address);
+
 	if (unlocked)
 		fault_flags |= FAULT_FLAG_ALLOW_RETRY;
 
-- 
2.18.0.rc1.244.gcf134e6275-goog

--
To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in
the body of a message to majordomo at vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

WARNING: multiple messages have this Message-ID
From: andreyknvl@google.com (Andrey Konovalov)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 4/7] mm, arm64: untag user addresses in mm/gup.c
Date: Wed, 20 Jun 2018 17:24:23 +0200	[thread overview]
Message-ID: <1203c510e5c34e97e5940688df075d69429e94de.1529507994.git.andreyknvl@google.com> (raw)
In-Reply-To: <cover.1529507994.git.andreyknvl@google.com>

mm/gup.c provides a kernel interface that accepts user addresses and
manipulates user pages directly (for example get_user_pages, that is used
by the futex syscall). Here we also need to handle the case of tagged user
pointers.

Add untagging to gup.c functions that use user pointers for vma lookup.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
---
 mm/gup.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/gup.c b/mm/gup.c
index b70d7ba7cc13..5bb351c91989 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -666,6 +666,8 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 	if (!nr_pages)
 		return 0;
 
+	start = untagged_addr(start);
+
 	VM_BUG_ON(!!pages != !!(gup_flags & FOLL_GET));
 
 	/*
@@ -820,6 +822,8 @@ int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm,
 	struct vm_area_struct *vma;
 	int ret, major = 0;
 
+	address = untagged_addr(address);
+
 	if (unlocked)
 		fault_flags |= FAULT_FLAG_ALLOW_RETRY;
 
-- 
2.18.0.rc1.244.gcf134e6275-goog

  parent reply	other threads:[~2018-06-20 15:26 UTC|newest]

Thread overview: 195+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-20 15:24 [PATCH v4 0/7] arm64: untag user pointers passed to the kernel Andrey Konovalov
2018-06-20 15:24 ` Andrey Konovalov
2018-06-20 15:24 ` Andrey Konovalov
2018-06-20 15:24 ` Andrey Konovalov
2018-06-20 15:24 ` Andrey Konovalov
2018-06-20 15:24 ` andreyknvl
2018-06-20 15:24 ` Andrey Konovalov
2018-06-20 15:24 ` [PATCH v4 1/7] arm64: add type casts to untagged_addr macro Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` andreyknvl
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24 ` [PATCH v4 2/7] uaccess: add untagged_addr definition for other arches Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` andreyknvl
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24 ` [PATCH v4 3/7] arm64: untag user addresses in access_ok and __uaccess_mask_ptr Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` andreyknvl
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24 ` Andrey Konovalov [this message]
2018-06-20 15:24   ` [PATCH v4 4/7] mm, arm64: untag user addresses in mm/gup.c Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` andreyknvl
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24 ` [PATCH v4 5/7] lib, arm64: untag addrs passed to strncpy_from_user and strnlen_user Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` andreyknvl
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24 ` [PATCH v4 6/7] arm64: update Documentation/arm64/tagged-pointers.txt Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` andreyknvl
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24 ` [PATCH v4 7/7] selftests, arm64: add a selftest for passing tagged pointers to kernel Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` Andrey Konovalov
2018-06-20 15:24   ` andreyknvl
2018-06-20 15:24   ` Andrey Konovalov
2018-06-26 12:47 ` [PATCH v4 0/7] arm64: untag user pointers passed to the kernel Andrey Konovalov
2018-06-26 12:47   ` Andrey Konovalov
2018-06-26 12:47   ` Andrey Konovalov
2018-06-26 12:47   ` andreyknvl
2018-06-26 12:47   ` Andrey Konovalov
2018-06-26 17:29   ` Catalin Marinas
2018-06-26 17:29     ` Catalin Marinas
2018-06-26 17:29     ` Catalin Marinas
2018-06-26 17:29     ` Catalin Marinas
2018-06-26 17:29     ` catalin.marinas
2018-06-26 17:29     ` Catalin Marinas
2018-06-27 15:05     ` Andrey Konovalov
2018-06-27 15:05       ` Andrey Konovalov
2018-06-27 15:05       ` Andrey Konovalov
2018-06-27 15:05       ` Andrey Konovalov
2018-06-27 15:05       ` andreyknvl
2018-06-27 15:05       ` Andrey Konovalov
2018-06-27 15:08       ` Ramana Radhakrishnan
2018-06-27 15:08         ` Ramana Radhakrishnan
2018-06-27 15:08         ` Ramana Radhakrishnan
2018-06-27 15:08         ` Ramana Radhakrishnan
2018-06-27 15:08         ` Ramana Radhakrishnan
2018-06-27 15:08         ` ramana.radhakrishnan
2018-06-27 15:08         ` Ramana Radhakrishnan
2018-06-27 17:17         ` Catalin Marinas
2018-06-27 17:17           ` Catalin Marinas
2018-06-27 17:17           ` Catalin Marinas
2018-06-27 17:17           ` Catalin Marinas
2018-06-27 17:17           ` Catalin Marinas
2018-06-27 17:17           ` catalin.marinas
2018-06-27 17:17           ` Catalin Marinas
2018-06-28  6:17           ` Luc Van Oostenryck
2018-06-28  6:17             ` Luc Van Oostenryck
2018-06-28  6:17             ` Luc Van Oostenryck
2018-06-28  6:17             ` Luc Van Oostenryck
2018-06-28  6:17             ` Luc Van Oostenryck
2018-06-28  6:17             ` luc.vanoostenryck
2018-06-28  6:17             ` Luc Van Oostenryck
2018-06-28 10:27             ` Catalin Marinas
2018-06-28 10:27               ` Catalin Marinas
2018-06-28 10:27               ` Catalin Marinas
2018-06-28 10:27               ` Catalin Marinas
2018-06-28 10:27               ` Catalin Marinas
2018-06-28 10:27               ` catalin.marinas
2018-06-28 10:27               ` Catalin Marinas
2018-06-28 10:46               ` Luc Van Oostenryck
2018-06-28 10:46                 ` Luc Van Oostenryck
2018-06-28 10:46                 ` Luc Van Oostenryck
2018-06-28 10:46                 ` Luc Van Oostenryck
2018-06-28 10:46                 ` Luc Van Oostenryck
2018-06-28 10:46                 ` luc.vanoostenryck
2018-06-28 10:46                 ` Luc Van Oostenryck
2018-06-28 14:48                 ` Catalin Marinas
2018-06-28 14:48                   ` Catalin Marinas
2018-06-28 14:48                   ` Catalin Marinas
2018-06-28 14:48                   ` Catalin Marinas
2018-06-28 14:48                   ` Catalin Marinas
2018-06-28 14:48                   ` catalin.marinas
2018-06-28 14:48                   ` Catalin Marinas
2018-06-28 15:28                   ` Luc Van Oostenryck
2018-06-28 15:28                     ` Luc Van Oostenryck
2018-06-28 15:28                     ` Luc Van Oostenryck
2018-06-28 15:28                     ` Luc Van Oostenryck
2018-06-28 15:28                     ` Luc Van Oostenryck
2018-06-28 15:28                     ` luc.vanoostenryck
2018-06-28 15:28                     ` Luc Van Oostenryck
2018-06-29 15:27                   ` David Laight
2018-06-29 15:27                     ` David Laight
2018-06-29 15:27                     ` David Laight
2018-06-29 15:27                     ` David Laight
2018-06-29 15:27                     ` David Laight
2018-06-29 15:27                     ` David.Laight
2018-06-29 15:27                     ` David Laight
2018-06-28 23:21               ` [PATCH] sparse: stricter warning for explicit cast to ulong Luc Van Oostenryck
2018-06-28 23:21                 ` Luc Van Oostenryck
2018-06-28 23:21                 ` Luc Van Oostenryck
2018-06-28 23:21                 ` Luc Van Oostenryck
2018-06-28 23:21                 ` luc.vanoostenryck
2018-06-28 23:21                 ` Luc Van Oostenryck
2018-06-28 23:21                 ` Luc Van Oostenryck
2018-06-28 19:30       ` [PATCH v4 0/7] arm64: untag user pointers passed to the kernel Andrey Konovalov
2018-06-28 19:30         ` Andrey Konovalov
2018-06-28 19:30         ` Andrey Konovalov
2018-06-28 19:30         ` Andrey Konovalov
2018-06-28 19:30         ` andreyknvl
2018-06-28 19:30         ` Andrey Konovalov
2018-06-29 15:19         ` Andrey Konovalov
2018-06-29 15:19           ` Andrey Konovalov
2018-06-29 15:19           ` Andrey Konovalov
2018-06-29 15:19           ` Andrey Konovalov
2018-06-29 15:19           ` andreyknvl
2018-06-29 15:19           ` Andrey Konovalov
2018-06-29 15:20           ` Andrey Konovalov
2018-06-29 15:20             ` Andrey Konovalov
2018-06-29 15:20             ` Andrey Konovalov
2018-06-29 15:20             ` Andrey Konovalov
2018-06-29 15:20             ` andreyknvl
2018-06-29 15:20             ` Andrey Konovalov
2018-07-16 11:25         ` Andrey Konovalov
2018-07-16 11:25           ` Andrey Konovalov
2018-07-16 11:25           ` Andrey Konovalov
2018-07-16 11:25           ` Andrey Konovalov
2018-07-16 11:25           ` andreyknvl
2018-07-16 11:25           ` Andrey Konovalov
2018-07-31 13:23           ` Andrey Konovalov
2018-07-31 13:23             ` Andrey Konovalov
2018-07-31 13:23             ` Andrey Konovalov
2018-07-31 13:23             ` Andrey Konovalov
2018-07-31 13:23             ` andreyknvl
2018-07-31 13:23             ` Andrey Konovalov
2018-08-01 17:42           ` Catalin Marinas
2018-08-01 17:42             ` Catalin Marinas
2018-08-01 17:42             ` Catalin Marinas
2018-08-01 17:42             ` Catalin Marinas
2018-08-01 17:42             ` catalin.marinas
2018-08-01 17:42             ` Catalin Marinas
2018-08-02 15:00             ` Andrey Konovalov
2018-08-02 15:00               ` Andrey Konovalov
2018-08-02 15:00               ` Andrey Konovalov
2018-08-02 15:00               ` Andrey Konovalov
2018-08-02 15:00               ` andreyknvl
2018-08-02 15:00               ` Andrey Konovalov
2018-08-03 14:59               ` Andrey Konovalov
2018-08-03 14:59                 ` Andrey Konovalov
2018-08-03 14:59                 ` Andrey Konovalov
2018-08-03 14:59                 ` Andrey Konovalov
2018-08-03 14:59                 ` andreyknvl
2018-08-03 14:59                 ` Andrey Konovalov
2018-08-03 15:09                 ` Greg Kroah-Hartman
2018-08-03 15:09                   ` Greg Kroah-Hartman
2018-08-03 15:09                   ` Greg Kroah-Hartman
2018-08-03 15:09                   ` Greg Kroah-Hartman
2018-08-03 15:09                   ` gregkh
2018-08-03 15:09                   ` Greg Kroah-Hartman
2018-08-03 16:43                   ` Matthew Wilcox
2018-08-03 16:43                     ` Matthew Wilcox
2018-08-03 16:43                     ` Matthew Wilcox
2018-08-03 16:43                     ` Matthew Wilcox
2018-08-03 16:43                     ` willy
2018-08-03 16:43                     ` Matthew Wilcox
2018-08-03 16:54                     ` Andrey Konovalov
2018-08-03 16:54                       ` Andrey Konovalov
2018-08-03 16:54                       ` Andrey Konovalov
2018-08-03 16:54                       ` Andrey Konovalov
2018-08-03 16:54                       ` andreyknvl
2018-08-03 16:54                       ` Andrey Konovalov
2018-08-06 19:12                   ` Luc Van Oostenryck
2018-08-06 19:12                     ` Luc Van Oostenryck
2018-08-06 19:12                     ` Luc Van Oostenryck
2018-08-06 19:12                     ` Luc Van Oostenryck
2018-08-06 19:12                     ` luc.vanoostenryck
2018-08-06 19:12                     ` Luc Van Oostenryck

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