Add support for the new lsm_config_self_policy and
lsm_config_system_policy syscalls, providing a unified API for loading
and modifying LSM policies, for the current user and for the entire
system, respectively without requiring the LSM’s pseudo-filesystems.

Benefits:
  - Works even if the LSM pseudo-filesystem isn’t mounted or available
    (e.g. in containers)
  - Offers a logical and unified interface rather than multiple
    heterogeneous pseudo-filesystems
  - Avoids the overhead of other kernel interfaces for better efficiency

Signed-off-by: Maxime Bélair <maxime.belair@canonical.com>
---
 arch/alpha/kernel/syscalls/syscall.tbl            |  2 ++
 arch/arm/tools/syscall.tbl                        |  2 ++
 arch/m68k/kernel/syscalls/syscall.tbl             |  2 ++
 arch/microblaze/kernel/syscalls/syscall.tbl       |  2 ++
 arch/mips/kernel/syscalls/syscall_n32.tbl         |  2 ++
 arch/mips/kernel/syscalls/syscall_n64.tbl         |  2 ++
 arch/mips/kernel/syscalls/syscall_o32.tbl         |  2 ++
 arch/parisc/kernel/syscalls/syscall.tbl           |  2 ++
 arch/powerpc/kernel/syscalls/syscall.tbl          |  2 ++
 arch/s390/kernel/syscalls/syscall.tbl             |  2 ++
 arch/sh/kernel/syscalls/syscall.tbl               |  2 ++
 arch/sparc/kernel/syscalls/syscall.tbl            |  2 ++
 arch/x86/entry/syscalls/syscall_32.tbl            |  2 ++
 arch/x86/entry/syscalls/syscall_64.tbl            |  2 ++
 arch/xtensa/kernel/syscalls/syscall.tbl           |  2 ++
 include/linux/syscalls.h                          |  5 +++++
 include/uapi/asm-generic/unistd.h                 |  6 +++++-
 kernel/sys_ni.c                                   |  2 ++
 security/lsm_syscalls.c                           | 12 ++++++++++++
 tools/include/uapi/asm-generic/unistd.h           |  6 +++++-
 tools/perf/arch/x86/entry/syscalls/syscall_64.tbl |  2 ++
 21 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/arch/alpha/kernel/syscalls/syscall.tbl b/arch/alpha/kernel/syscalls/syscall.tbl
index 2dd6340de6b4..4fc75352220d 100644
--- a/arch/alpha/kernel/syscalls/syscall.tbl
+++ b/arch/alpha/kernel/syscalls/syscall.tbl
@@ -507,3 +507,5 @@
 575	common	listxattrat			sys_listxattrat
 576	common	removexattrat			sys_removexattrat
 577	common	open_tree_attr			sys_open_tree_attr
+578	common	lsm_config_self_policy		sys_lsm_config_self_policy
+579	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
index 27c1d5ebcd91..326483cb94a4 100644
--- a/arch/arm/tools/syscall.tbl
+++ b/arch/arm/tools/syscall.tbl
@@ -482,3 +482,5 @@
 465	common	listxattrat			sys_listxattrat
 466	common	removexattrat			sys_removexattrat
 467	common	open_tree_attr			sys_open_tree_attr
+468	common	lsm_config_self_policy		sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/m68k/kernel/syscalls/syscall.tbl b/arch/m68k/kernel/syscalls/syscall.tbl
index 9fe47112c586..d37364df1cd7 100644
--- a/arch/m68k/kernel/syscalls/syscall.tbl
+++ b/arch/m68k/kernel/syscalls/syscall.tbl
@@ -467,3 +467,5 @@
 465	common	listxattrat			sys_listxattrat
 466	common	removexattrat			sys_removexattrat
 467	common	open_tree_attr			sys_open_tree_attr
+468	common	lsm_config_self_policy		sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/microblaze/kernel/syscalls/syscall.tbl b/arch/microblaze/kernel/syscalls/syscall.tbl
index 7b6e97828e55..9d58ebfcf967 100644
--- a/arch/microblaze/kernel/syscalls/syscall.tbl
+++ b/arch/microblaze/kernel/syscalls/syscall.tbl
@@ -473,3 +473,5 @@
 465	common	listxattrat			sys_listxattrat
 466	common	removexattrat			sys_removexattrat
 467	common	open_tree_attr			sys_open_tree_attr
+468	common	lsm_config_self_policy		sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/mips/kernel/syscalls/syscall_n32.tbl b/arch/mips/kernel/syscalls/syscall_n32.tbl
index aa70e371bb54..8627b5f56280 100644
--- a/arch/mips/kernel/syscalls/syscall_n32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n32.tbl
@@ -406,3 +406,5 @@
 465	n32	listxattrat			sys_listxattrat
 466	n32	removexattrat			sys_removexattrat
 467	n32	open_tree_attr			sys_open_tree_attr
+468	n32	lsm_config_self_policy		sys_lsm_config_self_policy
+469	n32	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/mips/kernel/syscalls/syscall_n64.tbl b/arch/mips/kernel/syscalls/syscall_n64.tbl
index 1e8c44c7b614..813207b61f58 100644
--- a/arch/mips/kernel/syscalls/syscall_n64.tbl
+++ b/arch/mips/kernel/syscalls/syscall_n64.tbl
@@ -382,3 +382,5 @@
 465	n64	listxattrat			sys_listxattrat
 466	n64	removexattrat			sys_removexattrat
 467	n64	open_tree_attr			sys_open_tree_attr
+468	n64	lsm_config_self_policy		sys_lsm_config_self_policy
+469	n64	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/mips/kernel/syscalls/syscall_o32.tbl b/arch/mips/kernel/syscalls/syscall_o32.tbl
index 114a5a1a6230..9cd0946b4370 100644
--- a/arch/mips/kernel/syscalls/syscall_o32.tbl
+++ b/arch/mips/kernel/syscalls/syscall_o32.tbl
@@ -455,3 +455,5 @@
 465	o32	listxattrat			sys_listxattrat
 466	o32	removexattrat			sys_removexattrat
 467	o32	open_tree_attr			sys_open_tree_attr
+468	o32	lsm_config_self_policy		sys_lsm_config_self_policy
+469	o32	lsm_config_system_policy		sys_lsm_config_system_policy
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index 94df3cb957e9..9db01dd55793 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -466,3 +466,5 @@
 465	common	listxattrat			sys_listxattrat
 466	common	removexattrat			sys_removexattrat
 467	common	open_tree_attr			sys_open_tree_attr
+468	common	lsm_config_self_policy		sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/powerpc/kernel/syscalls/syscall.tbl b/arch/powerpc/kernel/syscalls/syscall.tbl
index 9a084bdb8926..97714acb39ab 100644
--- a/arch/powerpc/kernel/syscalls/syscall.tbl
+++ b/arch/powerpc/kernel/syscalls/syscall.tbl
@@ -558,3 +558,5 @@
 465	common	listxattrat			sys_listxattrat
 466	common	removexattrat			sys_removexattrat
 467	common	open_tree_attr			sys_open_tree_attr
+468	common	lsm_config_self_policy		sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index a4569b96ef06..d2b0f14fb516 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -470,3 +470,5 @@
 465  common	listxattrat		sys_listxattrat			sys_listxattrat
 466  common	removexattrat		sys_removexattrat		sys_removexattrat
 467  common	open_tree_attr		sys_open_tree_attr		sys_open_tree_attr
+468  common	lsm_config_self_policy	sys_lsm_config_self_policy		sys_lsm_config_self_policy
+469  common	lsm_config_system_policy	sys_lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/sh/kernel/syscalls/syscall.tbl b/arch/sh/kernel/syscalls/syscall.tbl
index 52a7652fcff6..210d7118ce16 100644
--- a/arch/sh/kernel/syscalls/syscall.tbl
+++ b/arch/sh/kernel/syscalls/syscall.tbl
@@ -471,3 +471,5 @@
 465	common	listxattrat			sys_listxattrat
 466	common	removexattrat			sys_removexattrat
 467	common	open_tree_attr			sys_open_tree_attr
+468	common	lsm_config_self_policy		sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/sparc/kernel/syscalls/syscall.tbl b/arch/sparc/kernel/syscalls/syscall.tbl
index 83e45eb6c095..494417d80680 100644
--- a/arch/sparc/kernel/syscalls/syscall.tbl
+++ b/arch/sparc/kernel/syscalls/syscall.tbl
@@ -513,3 +513,5 @@
 465	common	listxattrat			sys_listxattrat
 466	common	removexattrat			sys_removexattrat
 467	common	open_tree_attr			sys_open_tree_attr
+468	common	lsm_config_self_policy		sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/x86/entry/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl
index ac007ea00979..36c2c538e04f 100644
--- a/arch/x86/entry/syscalls/syscall_32.tbl
+++ b/arch/x86/entry/syscalls/syscall_32.tbl
@@ -473,3 +473,5 @@
 465	i386	listxattrat		sys_listxattrat
 466	i386	removexattrat		sys_removexattrat
 467	i386	open_tree_attr		sys_open_tree_attr
+468	i386	lsm_config_self_policy	sys_lsm_config_self_policy
+469	i386	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index cfb5ca41e30d..7eefbccfe531 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -391,6 +391,8 @@
 465	common	listxattrat		sys_listxattrat
 466	common	removexattrat		sys_removexattrat
 467	common	open_tree_attr		sys_open_tree_attr
+468	common	lsm_config_self_policy	sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
 
 #
 # 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 f657a77314f8..90d86a54a952 100644
--- a/arch/xtensa/kernel/syscalls/syscall.tbl
+++ b/arch/xtensa/kernel/syscalls/syscall.tbl
@@ -438,3 +438,5 @@
 465	common	listxattrat			sys_listxattrat
 466	common	removexattrat			sys_removexattrat
 467	common	open_tree_attr			sys_open_tree_attr
+468	common	lsm_config_self_policy		sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index e5603cc91963..15b0f35c42fe 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -988,6 +988,11 @@ asmlinkage long sys_lsm_get_self_attr(unsigned int attr, struct lsm_ctx __user *
 asmlinkage long sys_lsm_set_self_attr(unsigned int attr, struct lsm_ctx __user *ctx,
 				      u32 size, u32 flags);
 asmlinkage long sys_lsm_list_modules(u64 __user *ids, u32 __user *size, u32 flags);
+asmlinkage long sys_lsm_config_self_policy(u32 lsm_id, u32 op, void __user *buf,
+					   u32 __user *size, u32 flags);
+asmlinkage long sys_lsm_config_system_policy(u32 lsm_id, u32 op, void __user *buf,
+					     u32 __user *size, u32 flags);
+
 
 /*
  * Architecture-specific system calls
diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h
index 2892a45023af..34278cc6a476 100644
--- a/include/uapi/asm-generic/unistd.h
+++ b/include/uapi/asm-generic/unistd.h
@@ -851,9 +851,13 @@ __SYSCALL(__NR_listxattrat, sys_listxattrat)
 __SYSCALL(__NR_removexattrat, sys_removexattrat)
 #define __NR_open_tree_attr 467
 __SYSCALL(__NR_open_tree_attr, sys_open_tree_attr)
+#define __NR_lsm_config_self_policy 468
+__SYSCALL(__NR_lsm_config_self_policy, lsm_config_self_policy)
+#define __NR_lsm_config_system_policy 469
+__SYSCALL(__NR_lsm_config_system_policy, lsm_config_system_policy)
 
 #undef __NR_syscalls
-#define __NR_syscalls 468
+#define __NR_syscalls 470
 
 /*
  * 32 bit systems traditionally used different
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index c00a86931f8c..3ecebcd3fbe0 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -172,6 +172,8 @@ COND_SYSCALL_COMPAT(fadvise64_64);
 COND_SYSCALL(lsm_get_self_attr);
 COND_SYSCALL(lsm_set_self_attr);
 COND_SYSCALL(lsm_list_modules);
+COND_SYSCALL(lsm_config_self_policy);
+COND_SYSCALL(lsm_config_system_policy);
 
 /* CONFIG_MMU only */
 COND_SYSCALL(swapon);
diff --git a/security/lsm_syscalls.c b/security/lsm_syscalls.c
index 8440948a690c..a3cb6dab8102 100644
--- a/security/lsm_syscalls.c
+++ b/security/lsm_syscalls.c
@@ -118,3 +118,15 @@ SYSCALL_DEFINE3(lsm_list_modules, u64 __user *, ids, u32 __user *, size,
 
 	return lsm_active_cnt;
 }
+
+SYSCALL_DEFINE5(lsm_config_self_policy, u32, lsm_id, u32, op, void __user *,
+		buf, u32 __user *, size, u32, flags)
+{
+	return 0;
+}
+
+SYSCALL_DEFINE5(lsm_config_system_policy, u32, lsm_id, u32, op, void __user *,
+		buf, u32 __user *, size, u32, flags)
+{
+	return 0;
+}
diff --git a/tools/include/uapi/asm-generic/unistd.h b/tools/include/uapi/asm-generic/unistd.h
index 2892a45023af..34278cc6a476 100644
--- a/tools/include/uapi/asm-generic/unistd.h
+++ b/tools/include/uapi/asm-generic/unistd.h
@@ -851,9 +851,13 @@ __SYSCALL(__NR_listxattrat, sys_listxattrat)
 __SYSCALL(__NR_removexattrat, sys_removexattrat)
 #define __NR_open_tree_attr 467
 __SYSCALL(__NR_open_tree_attr, sys_open_tree_attr)
+#define __NR_lsm_config_self_policy 468
+__SYSCALL(__NR_lsm_config_self_policy, lsm_config_self_policy)
+#define __NR_lsm_config_system_policy 469
+__SYSCALL(__NR_lsm_config_system_policy, lsm_config_system_policy)
 
 #undef __NR_syscalls
-#define __NR_syscalls 468
+#define __NR_syscalls 470
 
 /*
  * 32 bit systems traditionally used different
diff --git a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
index cfb5ca41e30d..7eefbccfe531 100644
--- a/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
@@ -391,6 +391,8 @@
 465	common	listxattrat		sys_listxattrat
 466	common	removexattrat		sys_removexattrat
 467	common	open_tree_attr		sys_open_tree_attr
+468	common	lsm_config_self_policy	sys_lsm_config_self_policy
+469	common	lsm_config_system_policy	sys_lsm_config_system_policy
 
 #
 # Due to a historical design error, certain syscalls are numbered differently
-- 
2.48.1

Hi Maxime,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 9c32cda43eb78f78c73aee4aa344b777714e259b]

url:    https://github.com/intel-lab-lkp/linux/commits/Maxime-B-lair/Wire-up-lsm_config_self_policy-and-lsm_config_system_policy-syscalls/20250624-225008
base:   9c32cda43eb78f78c73aee4aa344b777714e259b
patch link:    https://lore.kernel.org/r/20250624143211.436045-2-maxime.belair%40canonical.com
patch subject: [PATCH v3 1/3] Wire up lsm_config_self_policy and lsm_config_system_policy syscalls
config: riscv-randconfig-001-20250627 (https://download.01.org/0day-ci/archive/20250627/202506271432.Hsg0FzKQ-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250627/202506271432.Hsg0FzKQ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506271432.Hsg0FzKQ-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/linux/compat.h:34,
                    from arch/riscv/include/asm/elf.h:12,
                    from include/linux/elf.h:6,
                    from include/linux/module.h:19,
                    from include/linux/bpf.h:20,
                    from include/linux/security.h:35,
                    from security/lsm_syscalls.c:13:
   arch/riscv/include/asm/syscall_wrapper.h:35:14: warning: '__se_sys_lsm_set_self_attr' alias between functions of incompatible types 'long int(ulong,  ulong,  ulong,  ulong,  ulong,  ulong,  ulong)' {aka 'long int(long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int)'} and 'long int(long int,  long int,  long int,  long int)' [-Wattribute-alias]
     static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong,  \
                 ^~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:227:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:55:1: note: in expansion of macro 'SYSCALL_DEFINE4'
    SYSCALL_DEFINE4(lsm_set_self_attr, unsigned int, attr, struct lsm_ctx __user *,
    ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:41:14: note: aliased declaration here
     static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
                 ^~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:227:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:55:1: note: in expansion of macro 'SYSCALL_DEFINE4'
    SYSCALL_DEFINE4(lsm_set_self_attr, unsigned int, attr, struct lsm_ctx __user *,
    ^~~~~~~~~~~~~~~
>> arch/riscv/include/asm/syscall_wrapper.h:35:14: warning: '__se_sys_lsm_config_system_policy' alias between functions of incompatible types 'long int(ulong,  ulong,  ulong,  ulong,  ulong,  ulong,  ulong)' {aka 'long int(long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int)'} and 'long int(long int,  long int,  long int,  long int,  long int)' [-Wattribute-alias]
     static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong,  \
                 ^~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:228:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:128:1: note: in expansion of macro 'SYSCALL_DEFINE5'
    SYSCALL_DEFINE5(lsm_config_system_policy, u32, lsm_id, u32, op, void __user *,
    ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:41:14: note: aliased declaration here
     static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
                 ^~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:228:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:128:1: note: in expansion of macro 'SYSCALL_DEFINE5'
    SYSCALL_DEFINE5(lsm_config_system_policy, u32, lsm_id, u32, op, void __user *,
    ^~~~~~~~~~~~~~~
>> arch/riscv/include/asm/syscall_wrapper.h:35:14: warning: '__se_sys_lsm_config_self_policy' alias between functions of incompatible types 'long int(ulong,  ulong,  ulong,  ulong,  ulong,  ulong,  ulong)' {aka 'long int(long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int)'} and 'long int(long int,  long int,  long int,  long int,  long int)' [-Wattribute-alias]
     static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong,  \
                 ^~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:228:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:122:1: note: in expansion of macro 'SYSCALL_DEFINE5'
    SYSCALL_DEFINE5(lsm_config_self_policy, u32, lsm_id, u32, op, void __user *,
    ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:41:14: note: aliased declaration here
     static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
                 ^~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:228:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE5(name, ...) SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:122:1: note: in expansion of macro 'SYSCALL_DEFINE5'
    SYSCALL_DEFINE5(lsm_config_self_policy, u32, lsm_id, u32, op, void __user *,
    ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:35:14: warning: '__se_sys_lsm_list_modules' alias between functions of incompatible types 'long int(ulong,  ulong,  ulong,  ulong,  ulong,  ulong,  ulong)' {aka 'long int(long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int)'} and 'long int(long int,  long int,  long int)' [-Wattribute-alias]
     static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong,  \
                 ^~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:226:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:96:1: note: in expansion of macro 'SYSCALL_DEFINE3'
    SYSCALL_DEFINE3(lsm_list_modules, u64 __user *, ids, u32 __user *, size,
    ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:41:14: note: aliased declaration here
     static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
                 ^~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:226:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:96:1: note: in expansion of macro 'SYSCALL_DEFINE3'
    SYSCALL_DEFINE3(lsm_list_modules, u64 __user *, ids, u32 __user *, size,
    ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:35:14: warning: '__se_sys_lsm_get_self_attr' alias between functions of incompatible types 'long int(ulong,  ulong,  ulong,  ulong,  ulong,  ulong,  ulong)' {aka 'long int(long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int)'} and 'long int(long int,  long int,  long int,  long int)' [-Wattribute-alias]
     static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong,  \
                 ^~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:227:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:77:1: note: in expansion of macro 'SYSCALL_DEFINE4'
    SYSCALL_DEFINE4(lsm_get_self_attr, unsigned int, attr, struct lsm_ctx __user *,
    ^~~~~~~~~~~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:41:14: note: aliased declaration here
     static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
                 ^~~~~~
   arch/riscv/include/asm/syscall_wrapper.h:82:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx'
     __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__)    \
     ^~~~~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:235:2: note: in expansion of macro '__SYSCALL_DEFINEx'
     __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
     ^~~~~~~~~~~~~~~~~
   include/linux/syscalls.h:227:36: note: in expansion of macro 'SYSCALL_DEFINEx'
    #define SYSCALL_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
                                       ^~~~~~~~~~~~~~~
   security/lsm_syscalls.c:77:1: note: in expansion of macro 'SYSCALL_DEFINE4'
    SYSCALL_DEFINE4(lsm_get_self_attr, unsigned int, attr, struct lsm_ctx __user *,
    ^~~~~~~~~~~~~~~


vim +35 arch/riscv/include/asm/syscall_wrapper.h

a9ad73295cc1e3 Sami Tolvanen 2024-03-11  16  
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  17  #define __SYSCALL_SE_DEFINEx(x, prefix, name, ...)					\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  18  	static long __se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__));		\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  19  	static long __se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  20  
08d0ce30e0e4fc Sami Tolvanen 2023-07-10  21  #define SC_RISCV_REGS_TO_ARGS(x, ...)							\
08d0ce30e0e4fc Sami Tolvanen 2023-07-10  22  	__MAP(x,__SC_ARGS								\
08d0ce30e0e4fc Sami Tolvanen 2023-07-10  23  	      ,,regs->orig_a0,,regs->a1,,regs->a2					\
08d0ce30e0e4fc Sami Tolvanen 2023-07-10  24  	      ,,regs->a3,,regs->a4,,regs->a5,,regs->a6)
08d0ce30e0e4fc Sami Tolvanen 2023-07-10  25  
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  26  #else
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  27  /*
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  28   * Use type aliasing to ensure registers a0-a6 are correctly passed to the syscall
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  29   * implementation when >word-size arguments are used.
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  30   */
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  31  #define __SYSCALL_SE_DEFINEx(x, prefix, name, ...)					\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  32  	__diag_push();									\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  33  	__diag_ignore(GCC, 8, "-Wattribute-alias",					\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  34  			"Type aliasing is used to sanitize syscall arguments");		\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11 @35  	static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, 	\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  36  					ulong)						\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  37  			__attribute__((alias(__stringify(___se_##prefix##name))));	\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  38  	__diag_pop();									\
653650c468be21 Sami Tolvanen 2024-03-26  39  	static long noinline ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))	\
653650c468be21 Sami Tolvanen 2024-03-26  40  			__used;								\
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  41  	static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__))
a9ad73295cc1e3 Sami Tolvanen 2024-03-11  42  

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