[PATCH v20 09/12] arch: Wire up Landlock syscalls

Mickaël Salaün
2020-08-02T21:59:00Z

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

Signed-off-by: Mickaël Salaün <mic@digikod.net>
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>
---

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 | 4 ++++
arch/arm/tools/syscall.tbl | 4 ++++
arch/arm64/include/asm/unistd.h | 2 +-
arch/arm64/include/asm/unistd32.h | 8 ++++++++
arch/ia64/kernel/syscalls/syscall.tbl | 4 ++++
arch/m68k/kernel/syscalls/syscall.tbl | 4 ++++
arch/microblaze/kernel/syscalls/syscall.tbl | 4 ++++
arch/mips/kernel/syscalls/syscall_n32.tbl | 4 ++++
arch/mips/kernel/syscalls/syscall_n64.tbl | 4 ++++
arch/mips/kernel/syscalls/syscall_o32.tbl | 4 ++++
arch/parisc/kernel/syscalls/syscall.tbl | 4 ++++
arch/powerpc/kernel/syscalls/syscall.tbl | 4 ++++
arch/s390/kernel/syscalls/syscall.tbl | 4 ++++
arch/sh/kernel/syscalls/syscall.tbl | 4 ++++
arch/sparc/kernel/syscalls/syscall.tbl | 4 ++++
arch/x86/entry/syscalls/syscall_32.tbl | 4 ++++
arch/x86/entry/syscalls/syscall_64.tbl | 4 ++++
arch/xtensa/kernel/syscalls/syscall.tbl | 4 ++++
include/uapi/asm-generic/unistd.h | 10 +++++++++-
19 files changed, 82 insertions(+), 2 deletions(-)

diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl
index 5ddd128d4b7a..d59664094690 100644
--- a/arch/alpha/kernel/syscalls/syscall.tbl
+++ b/arch/alpha/kernel/syscalls/syscall.tbl
@@ -478,3 +478,7 @@
547 common openat2 sys_openat2
548 common pidfd_getfd sys_pidfd_getfd
549 common faccessat2 sys_faccessat2
+554 common landlock_get_features sys_landlock_get_features
+555 common landlock_create_ruleset sys_landlock_create_ruleset
+556 common landlock_add_rule sys_landlock_add_rule
+557 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index d5cae5ffede0..9fe59a61fa75 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -452,3 +452,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h
index 3b859596840d..fb7a0be2f3d9 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 440
+#define __NR_compat_syscalls 448
#endif

#define __ARCH_WANT_SYS_CLONE
diff --git a/arch/arm64/include/asm/unistd32.h b/arch/arm64/include/asm/unistd32.h
index 6d95d0c8bf2f..d150396491e6 100644
--- a/arch/arm64/include/asm/unistd32.h
+++ b/arch/arm64/include/asm/unistd32.h
@@ -885,6 +885,14 @@ __SYSCALL(__NR_openat2, sys_openat2)
__SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd)
#define __NR_faccessat2 439
__SYSCALL(__NR_faccessat2, sys_faccessat2)
+#define __NR_landlock_get_features 444
+__SYSCALL(__NR_landlock_get_features, sys_landlock_get_features)
+#define __NR_landlock_create_ruleset 445
+__SYSCALL(__NR_landlock_create_ruleset, sys_landlock_create_ruleset)
+#define __NR_landlock_add_rule 446
+__SYSCALL(__NR_landlock_add_rule, sys_landlock_add_rule)
+#define __NR_landlock_enforce_ruleset 447
+__SYSCALL(__NR_landlock_enforce_ruleset, sys_landloc_enforce_rulesetk)

/*
* 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 49e325b604b3..84872f8daa42 100644
--- a/arch/ia64/kernel/syscalls/syscall.tbl
+++ b/arch/ia64/kernel/syscalls/syscall.tbl
@@ -359,3 +359,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index f71b1bbcc198..a362b4b16d7b 100644
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -438,3 +438,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl
index edacc4561f2b..acc931725b43 100644
--- a/arch/microblaze/kernel/syscalls/syscall.tbl
+++ b/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -444,3 +444,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index f777141f5256..5e1d5bfced9d 100644
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -377,3 +377,7 @@
437 n32 openat2 sys_openat2
438 n32 pidfd_getfd sys_pidfd_getfd
439 n32 faccessat2 sys_faccessat2
+444 n32 landlock_get_features sys_landlock_get_features
+445 n32 landlock_create_ruleset sys_landlock_create_ruleset
+446 n32 landlock_add_rule sys_landlock_add_rule
+447 n32 landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl
index da8c76394e17..8d9b6175f4af 100644
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -353,3 +353,7 @@
437 n64 openat2 sys_openat2
438 n64 pidfd_getfd sys_pidfd_getfd
439 n64 faccessat2 sys_faccessat2
+444 n64 landlock_get_features sys_landlock_get_features
+445 n64 landlock_create_ruleset sys_landlock_create_ruleset
+446 n64 landlock_add_rule sys_landlock_add_rule
+447 n64 landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index 13280625d312..66e58338772a 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -426,3 +426,7 @@
437 o32 openat2 sys_openat2
438 o32 pidfd_getfd sys_pidfd_getfd
439 o32 faccessat2 sys_faccessat2
+444 o32 landlock_get_features sys_landlock_get_features
+445 o32 landlock_create_ruleset sys_landlock_create_ruleset
+446 o32 landlock_add_rule sys_landlock_add_rule
+447 o32 landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index 5a758fa6ec52..70bdc7c43464 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -436,3 +436,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index f833a3190822..3f1d2c12eb98 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -528,3 +528,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index bfdcb7633957..577d590450e9 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -441,3 +441,7 @@
437 common openat2 sys_openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl
index acc35daa1b79..9202338a9e70 100644
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -441,3 +441,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index 8004a276cb74..b4c47eefda57 100644
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -484,3 +484,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index d8f8a1a69ed1..26735df8c19e 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -443,3 +443,7 @@
437 i386 openat2 sys_openat2
438 i386 pidfd_getfd sys_pidfd_getfd
439 i386 faccessat2 sys_faccessat2
+444 i386 landlock_get_features sys_landlock_get_features
+445 i386 landlock_create_ruleset sys_landlock_create_ruleset
+446 i386 landlock_add_rule sys_landlock_add_rule
+447 i386 landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index 78847b32e137..7e9c927b51fb 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -360,6 +360,10 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset

#
# x32-specific system call numbers start at 512 to avoid cache impact
diff --git a/arch/xtensa/kernel/syscalls/syscall.tbl b/arch/xtensa/kernel/syscalls/syscall.tbl
index 69d0d73876b3..c8b1a6218ee6 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -409,3 +409,7 @@
437 common openat2 sys_openat2
438 common pidfd_getfd sys_pidfd_getfd
439 common faccessat2 sys_faccessat2
+444 common landlock_get_features sys_landlock_get_features
+445 common landlock_create_ruleset sys_landlock_create_ruleset
+446 common landlock_add_rule sys_landlock_add_rule
+447 common landlock_enforce_ruleset sys_landlock_enforce_ruleset
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index f4a01305d9a6..ff3afbf02b51 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -857,9 +857,17 @@ __SYSCALL(__NR_openat2, sys_openat2)
__SYSCALL(__NR_pidfd_getfd, sys_pidfd_getfd)
#define __NR_faccessat2 439
__SYSCALL(__NR_faccessat2, sys_faccessat2)
+#define __NR_landlock_get_features 444
+__SYSCALL(__NR_landlock_get_features, sys_landlock_get_features)
+#define __NR_landlock_create_ruleset 445
+__SYSCALL(__NR_landlock_create_ruleset, sys_landlock_create_ruleset)
+#define __NR_landlock_add_rule 446
+__SYSCALL(__NR_landlock_add_rule, sys_landlock_add_rule)
+#define __NR_landlock_enforce_ruleset 447
+__SYSCALL(__NR_landlock_enforce_ruleset, sys_landloc_enforce_rulesetk)

#undef __NR_syscalls
-#define __NR_syscalls 440
+#define __NR_syscalls 448

/*
* 32 bit systems traditionally used different
--
2.28.0.rc2