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From: "Mickaël Salaün" <mic@digikod.net>
To: James Morris <jmorris@namei.org>, Jann Horn <jannh@google.com>,
	"Serge E . Hallyn" <serge@hallyn.com>
Cc: "Mickaël Salaün" <mic@digikod.net>,
	"Al Viro" <viro@zeniv.linux.org.uk>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Andy Lutomirski" <luto@amacapital.net>,
	"Anton Ivanov" <anton.ivanov@cambridgegreys.com>,
	"Arnd Bergmann" <arnd@arndb.de>,
	"Casey Schaufler" <casey@schaufler-ca.com>,
	"David Howells" <dhowells@redhat.com>,
	"Jeff Dike" <jdike@addtoit.com>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Kees Cook" <keescook@chromium.org>,
	"Michael Kerrisk" <mtk.manpages@gmail.com>,
	"Richard Weinberger" <richard@nod.at>,
	"Shuah Khan" <shuah@kernel.org>,
	"Vincent Dagonneau" <vincent.dagonneau@ssi.gouv.fr>,
	kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org,
	linux-arch@vger.kernel.org, linux-doc@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-kselftest@vger.kernel.org,
	linux-security-module@vger.kernel.org, x86@kernel.org,
	"Mickaël Salaün" <mic@linux.microsoft.com>
Subject: [PATCH v30 09/12] arch: Wire up Landlock syscalls
Date: Tue, 16 Mar 2021 21:42:49 +0100	[thread overview]
Message-ID: <20210316204252.427806-10-mic@digikod.net> (raw)
In-Reply-To: <20210316204252.427806-1-mic@digikod.net>

From: Mickaël Salaün <mic@linux.microsoft.com>

Wire up the following system calls for all architectures:
* landlock_create_ruleset(2)
* landlock_add_rule(2)
* landlock_restrict_self(2)

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: James Morris <jmorris@namei.org>
Cc: Jann Horn <jannh@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Serge E. Hallyn <serge@hallyn.com>
Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com>
Link: https://lore.kernel.org/r/20210316204252.427806-10-mic@digikod.net
---

Changes since v29:
* Rebase on v5.12-rc3 and fix trivial conflict with mount_setattr(2).
* Synchronize syscall numbers with -next, which are the same as for
  v5.12-rc3.

Changes since v27:
* Rename landlock_enforce_ruleset_self(2) to landlock_restrict_self(2).
* Cosmetic fix: align TBL enries.

Changes since v26:
* Rename landlock_enforce_ruleset_current(2) to
  landlock_enforce_ruleset_self(2).

Changes since v25:
* Rebase and leave space for the new epoll_pwait2(2) and memfd_secret(2)
  from -next.

Changes since v21:
* Rebase and leave space for watch_mount(2) from -next.

Changes since v20:
* Remove landlock_get_features(2).
* Decrease syscall numbers to stick to process_madvise(2) in -next.
* Rename landlock_enforce_ruleset(2) to
  landlock_enforce_ruleset_current(2).

Changes since v19:
* Increase syscall numbers by 4 to leave space for new ones (in
  linux-next): watch_mount(2), watch_sb(2), fsinfo(2) and
  process_madvise(2) (requested by Arnd Bergmann).
* Replace the previous multiplexor landlock(2) with 4 syscalls:
  landlock_get_features(2), landlock_create_ruleset(2),
  landlock_add_rule(2) and landlock_enforce_ruleset(2).

Changes since v18:
* Increase the syscall number because of the new faccessat2(2).

Changes since v14:
* Add all architectures.

Changes since v13:
* New implementation.
---
 arch/alpha/kernel/syscalls/syscall.tbl      | 3 +++
 arch/arm/tools/syscall.tbl                  | 3 +++
 arch/arm64/include/asm/unistd.h             | 2 +-
 arch/arm64/include/asm/unistd32.h           | 6 ++++++
 arch/ia64/kernel/syscalls/syscall.tbl       | 3 +++
 arch/m68k/kernel/syscalls/syscall.tbl       | 3 +++
 arch/microblaze/kernel/syscalls/syscall.tbl | 3 +++
 arch/mips/kernel/syscalls/syscall_n32.tbl   | 3 +++
 arch/mips/kernel/syscalls/syscall_n64.tbl   | 3 +++
 arch/mips/kernel/syscalls/syscall_o32.tbl   | 3 +++
 arch/parisc/kernel/syscalls/syscall.tbl     | 3 +++
 arch/powerpc/kernel/syscalls/syscall.tbl    | 3 +++
 arch/s390/kernel/syscalls/syscall.tbl       | 3 +++
 arch/sh/kernel/syscalls/syscall.tbl         | 3 +++
 arch/sparc/kernel/syscalls/syscall.tbl      | 3 +++
 arch/x86/entry/syscalls/syscall_32.tbl      | 3 +++
 arch/x86/entry/syscalls/syscall_64.tbl      | 3 +++
 arch/xtensa/kernel/syscalls/syscall.tbl     | 3 +++
 include/uapi/asm-generic/unistd.h           | 8 +++++++-
 19 files changed, 62 insertions(+), 2 deletions(-)

diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl
index 02f0244e005c..0924a3ac7bd9 100644
--- a/arch/alpha/kernel/syscalls/syscall.tbl
+++ b/arch/alpha/kernel/syscalls/syscall.tbl
@@ -482,3 +482,6 @@
 550	common	process_madvise			sys_process_madvise
 551	common	epoll_pwait2			sys_epoll_pwait2
 552	common	mount_setattr			sys_mount_setattr
+553	common	landlock_create_ruleset		sys_landlock_create_ruleset
+554	common	landlock_add_rule		sys_landlock_add_rule
+555	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index dcc1191291a2..dc1134b34cea 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -456,3 +456,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 949788f5ba40..d1cc2849dc00 100644
--- a/arch/arm64/include/asm/unistd.h
+++ b/arch/arm64/include/asm/unistd.h
@@ -38,7 +38,7 @@
 #define __ARM_NR_compat_set_tls		(__ARM_NR_COMPAT_BASE + 5)
 #define __ARM_NR_COMPAT_END		(__ARM_NR_COMPAT_BASE + 0x800)
 
-#define __NR_compat_syscalls		443
+#define __NR_compat_syscalls		446
 #endif
 
 #define __ARCH_WANT_SYS_CLONE
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 3d874f624056..54e11bce7677 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -893,6 +893,12 @@ __SYSCALL(__NR_process_madvise, sys_process_madvise)
 __SYSCALL(__NR_epoll_pwait2, compat_sys_epoll_pwait2)
 #define __NR_mount_setattr 442
 __SYSCALL(__NR_mount_setattr, sys_mount_setattr)
+#define __NR_landlock_create_ruleset 443
+__SYSCALL(__NR_landlock_create_ruleset, sys_landlock_create_ruleset)
+#define __NR_landlock_add_rule 444
+__SYSCALL(__NR_landlock_add_rule, sys_landlock_add_rule)
+#define __NR_landlock_restrict_self 445
+__SYSCALL(__NR_landlock_restrict_self, sys_landlock_restrict_self)
 
 /*
  * Please add new compat syscalls above this comment and update
diff --git a/arch/ia64/kernel/syscalls/syscall.tbl b/arch/ia64/kernel/syscalls/syscall.tbl
index d89231166e19..1bb35159561a 100644
--- a/arch/ia64/kernel/syscalls/syscall.tbl
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -363,3 +363,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index 72bde6707dd3..e06e224523bb 100644
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -442,3 +442,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl
index d603a5ec9338..9994a43eafb2 100644
--- a/arch/microblaze/kernel/syscalls/syscall.tbl
+++ b/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -448,3 +448,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index 8fd8c1790941..834333d84d3e 100644
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -381,3 +381,6 @@
 440	n32	process_madvise			sys_process_madvise
 441	n32	epoll_pwait2			compat_sys_epoll_pwait2
 442	n32	mount_setattr			sys_mount_setattr
+443	n32	landlock_create_ruleset		sys_landlock_create_ruleset
+444	n32	landlock_add_rule		sys_landlock_add_rule
+445	n32	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl
index 169f21438065..935024e0f49b 100644
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -357,3 +357,6 @@
 440	n64	process_madvise			sys_process_madvise
 441	n64	epoll_pwait2			sys_epoll_pwait2
 442	n64	mount_setattr			sys_mount_setattr
+443	n64	landlock_create_ruleset		sys_landlock_create_ruleset
+444	n64	landlock_add_rule		sys_landlock_add_rule
+445	n64	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index 090d29ca80ff..f3f8bea8ce99 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -430,3 +430,6 @@
 440	o32	process_madvise			sys_process_madvise
 441	o32	epoll_pwait2			sys_epoll_pwait2		compat_sys_epoll_pwait2
 442	o32	mount_setattr			sys_mount_setattr
+443	o32	landlock_create_ruleset		sys_landlock_create_ruleset
+444	o32	landlock_add_rule		sys_landlock_add_rule
+445	o32	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index 271a92519683..1bddfeffdebd 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -440,3 +440,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2		compat_sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 0b2480cf3e47..98548b8da879 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -522,3 +522,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2		compat_sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index 3abef2144dac..ecb697fee2f3 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -445,3 +445,6 @@
 440  common	process_madvise		sys_process_madvise		sys_process_madvise
 441  common	epoll_pwait2		sys_epoll_pwait2		compat_sys_epoll_pwait2
 442  common	mount_setattr		sys_mount_setattr		sys_mount_setattr
+443  common	landlock_create_ruleset	sys_landlock_create_ruleset	sys_landlock_create_ruleset
+444  common	landlock_add_rule	sys_landlock_add_rule		sys_landlock_add_rule
+445  common	landlock_restrict_self	sys_landlock_restrict_self	sys_landlock_restrict_self
diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl
index d08eebad6b7f..440c053eada5 100644
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -445,3 +445,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index 84403a99039c..f5f5d165c8c1 100644
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -488,3 +488,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2		compat_sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index a1c9f496fca6..995dc5b46dfc 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -447,3 +447,6 @@
 440	i386	process_madvise		sys_process_madvise
 441	i386	epoll_pwait2		sys_epoll_pwait2		compat_sys_epoll_pwait2
 442	i386	mount_setattr		sys_mount_setattr
+443	i386	landlock_create_ruleset	sys_landlock_create_ruleset
+444	i386	landlock_add_rule	sys_landlock_add_rule
+445	i386	landlock_restrict_self	sys_landlock_restrict_self
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 7bf01cbe582f..a5207ee2b67b 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -364,6 +364,9 @@
 440	common	process_madvise		sys_process_madvise
 441	common	epoll_pwait2		sys_epoll_pwait2
 442	common	mount_setattr		sys_mount_setattr
+443	common	landlock_create_ruleset	sys_landlock_create_ruleset
+444	common	landlock_add_rule	sys_landlock_add_rule
+445	common	landlock_restrict_self	sys_landlock_restrict_self
 
 #
 # Due to a historical design error, certain syscalls are numbered differently
diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
index 365a9b849224..b43b96a862cd 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -413,3 +413,6 @@
 440	common	process_madvise			sys_process_madvise
 441	common	epoll_pwait2			sys_epoll_pwait2
 442	common	mount_setattr			sys_mount_setattr
+443	common	landlock_create_ruleset		sys_landlock_create_ruleset
+444	common	landlock_add_rule		sys_landlock_add_rule
+445	common	landlock_restrict_self		sys_landlock_restrict_self
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index ce58cff99b66..02d8d7804a29 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -863,9 +863,15 @@ __SYSCALL(__NR_process_madvise, sys_process_madvise)
 __SC_COMP(__NR_epoll_pwait2, sys_epoll_pwait2, compat_sys_epoll_pwait2)
 #define __NR_mount_setattr 442
 __SYSCALL(__NR_mount_setattr, sys_mount_setattr)
+#define __NR_landlock_create_ruleset 443
+__SYSCALL(__NR_landlock_create_ruleset, sys_landlock_create_ruleset)
+#define __NR_landlock_add_rule 444
+__SYSCALL(__NR_landlock_add_rule, sys_landlock_add_rule)
+#define __NR_landlock_restrict_self 445
+__SYSCALL(__NR_landlock_restrict_self, sys_landlock_restrict_self)
 
 #undef __NR_syscalls
-#define __NR_syscalls 443
+#define __NR_syscalls 446
 
 /*
  * 32 bit systems traditionally used different
-- 
2.30.2


  parent reply	other threads:[~2021-03-16 20:44 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 20:42 [PATCH v30 00/12] Landlock LSM Mickaël Salaün
2021-03-16 20:42 ` [PATCH v30 01/12] landlock: Add object management Mickaël Salaün
2021-03-19 18:13   ` Kees Cook
2021-03-19 18:57     ` Mickaël Salaün
2021-03-16 20:42 ` [PATCH v30 02/12] landlock: Add ruleset and domain management Mickaël Salaün
2021-03-19 18:40   ` Kees Cook
2021-03-19 19:03     ` Mickaël Salaün
2021-03-19 19:15       ` Kees Cook
2021-03-24 20:31       ` James Morris
2021-03-25  9:29         ` Mickaël Salaün
2021-03-23  0:13   ` Jann Horn
2021-03-16 20:42 ` [PATCH v30 03/12] landlock: Set up the security framework and manage credentials Mickaël Salaün
2021-03-19 18:45   ` Kees Cook
2021-03-19 19:07     ` Mickaël Salaün
2021-03-16 20:42 ` [PATCH v30 04/12] landlock: Add ptrace restrictions Mickaël Salaün
2021-03-19 18:45   ` Kees Cook
2021-03-16 20:42 ` [PATCH v30 05/12] LSM: Infrastructure management of the superblock Mickaël Salaün
2021-03-19 17:24   ` Kees Cook
2021-03-16 20:42 ` [PATCH v30 06/12] fs,security: Add sb_delete hook Mickaël Salaün
2021-03-19 17:24   ` Kees Cook
2021-03-16 20:42 ` [PATCH v30 07/12] landlock: Support filesystem access-control Mickaël Salaün
2021-03-18 23:10   ` James Morris
2021-03-19 18:57   ` Kees Cook
2021-03-19 19:19     ` Mickaël Salaün
2021-03-23 19:30       ` Mickaël Salaün
2021-03-23  0:13   ` Jann Horn
2021-03-23 15:55     ` Mickaël Salaün
2021-03-23 17:49       ` Jann Horn
2021-03-23 19:22         ` Mickaël Salaün
2021-03-24  3:10           ` Jann Horn
2021-03-16 20:42 ` [PATCH v30 08/12] landlock: Add syscall implementations Mickaël Salaün
2021-03-19 19:06   ` Kees Cook
2021-03-19 21:53     ` Mickaël Salaün
2021-03-24 15:03       ` Mickaël Salaün
2021-03-16 20:42 ` Mickaël Salaün [this message]
2021-03-16 20:42 ` [PATCH v30 10/12] selftests/landlock: Add user space tests Mickaël Salaün
2021-03-19 17:56   ` Kees Cook
2021-03-19 18:41     ` Mickaël Salaün
2021-03-19 19:11       ` Kees Cook
2021-03-19 21:57         ` Mickaël Salaün
2021-03-16 20:42 ` [PATCH v30 11/12] samples/landlock: Add a sandbox manager example Mickaël Salaün
2021-03-19 17:26   ` Kees Cook
2021-03-16 20:42 ` [PATCH v30 12/12] landlock: Add user and kernel documentation Mickaël Salaün
2021-03-19 18:03   ` Kees Cook
2021-03-19 18:54     ` Mickaël Salaün
2021-03-23 19:25       ` Mickaël Salaün
2021-03-24 16:21       ` Mickaël Salaün
2021-03-18 23:26 ` [PATCH v30 00/12] Landlock LSM James Morris
2021-03-18 23:26   ` James Morris
2021-03-19 15:52   ` Mickaël Salaün

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