[linux-next:master 7948/13846] arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchroot' 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 unsigne...
kernel test robot <[email protected]>
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 6b8c8af514d739d0335f5579b585e02babe8a727 commit: 20370a5f5d9b1549ab3bf10a898b4e024b8841fa [7948/13846] fs: add fchroot() config: riscv-randconfig-002-20260810 (https://download.01.org/0day-ci/archive/20260810/[email protected]/config) compiler: riscv32-linux-gcc (GCC) 8.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260810/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:736:1: note: in expansion of macro 'SYSCALL_DEFINE2' SYSCALL_DEFINE2(chmod, const char __user *, filename, umode_t, mode) ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchmodat' 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:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:730:1: note: in expansion of macro 'SYSCALL_DEFINE3' SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename, ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) ^~~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:730:1: note: in expansion of macro 'SYSCALL_DEFINE3' SYSCALL_DEFINE3(fchmodat, int, dfd, const char __user *, filename, ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchmodat2' 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:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:724:1: note: in expansion of macro 'SYSCALL_DEFINE4' SYSCALL_DEFINE4(fchmodat2, int, dfd, const char __user *, filename, ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) ^~~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE4(name, ...) SYSCALL_DEFINEx(4, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:724:1: note: in expansion of macro 'SYSCALL_DEFINE4' SYSCALL_DEFINE4(fchmodat2, int, dfd, const char __user *, filename, ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchmod' 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)' [-Wattribute-alias] static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \ ^~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:689:1: note: in expansion of macro 'SYSCALL_DEFINE2' SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode) ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) ^~~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:689:1: note: in expansion of macro 'SYSCALL_DEFINE2' SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode) ^~~~~~~~~~~~~~~ >> arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchroot' 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)' [-Wattribute-alias] static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \ ^~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:621:1: note: in expansion of macro 'SYSCALL_DEFINE2' SYSCALL_DEFINE2(fchroot, int, fd, unsigned int, flags) ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) ^~~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: 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_DEFINE2(name, ...) SYSCALL_DEFINEx(2, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:621:1: note: in expansion of macro 'SYSCALL_DEFINE2' SYSCALL_DEFINE2(fchroot, int, fd, unsigned int, flags) ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_chroot' 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)' [-Wattribute-alias] static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \ ^~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^~~~~~~~~~~~~~~~~ include/linux/syscalls.h:225:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:591:1: note: in expansion of macro 'SYSCALL_DEFINE1' SYSCALL_DEFINE1(chroot, const char __user *, filename) ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) ^~~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^~~~~~~~~~~~~~~~~ include/linux/syscalls.h:225:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:591:1: note: in expansion of macro 'SYSCALL_DEFINE1' SYSCALL_DEFINE1(chroot, const char __user *, filename) ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_fchdir' 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)' [-Wattribute-alias] static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \ ^~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^~~~~~~~~~~~~~~~~ include/linux/syscalls.h:225:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:571:1: note: in expansion of macro 'SYSCALL_DEFINE1' SYSCALL_DEFINE1(fchdir, unsigned int, fd) ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:45:14: note: aliased declaration here static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) ^~~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^~~~~~~~~~~~~~~~~ include/linux/syscalls.h:225:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) ^~~~~~~~~~~~~~~ fs/open.c:571:1: note: in expansion of macro 'SYSCALL_DEFINE1' SYSCALL_DEFINE1(fchdir, unsigned int, fd) ^~~~~~~~~~~~~~~ arch/riscv/include/asm/syscall_wrapper.h:39:14: warning: '__se_sys_chdir' 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)' [-Wattribute-alias] static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \ ^~~~~ arch/riscv/include/asm/syscall_wrapper.h:86:2: note: in expansion of macro '__SYSCALL_SE_DEFINEx' __SYSCALL_SE_DEFINEx(x, sys, name, __VA_ARGS__) \ ^~~~~~~~~~~~~~~~~~~~ include/linux/syscalls.h:236:2: note: in expansion of macro '__SYSCALL_DEFINEx' __SYSCALL_DEFINEx(x, sname, __VA_ARGS__) ^~~~~~~~~~~~~~~~~ include/linux/syscalls.h:225:36: note: in expansion of macro 'SYSCALL_DEFINEx' #define SYSCALL_DEFINE1(name, ...) SYSCALL_DEFINEx(1, _##name, __VA_ARGS__) vim +39 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", \ 175db11786bde9 Nathan Chancellor 2026-05-16 34 "Type aliasing is used to sanitize syscall arguments"); \ 175db11786bde9 Nathan Chancellor 2026-05-16 35 __diag_ignore(clang, 23, "-Wunknown-warning-option", \ 175db11786bde9 Nathan Chancellor 2026-05-16 36 "Avoid breaking versions without -Wattribute-alias"); \ 175db11786bde9 Nathan Chancellor 2026-05-16 37 __diag_ignore(clang, 23, "-Wattribute-alias", \ a9ad73295cc1e3 Sami Tolvanen 2024-03-11 38 "Type aliasing is used to sanitize syscall arguments"); \ a9ad73295cc1e3 Sami Tolvanen 2024-03-11 @39 static long __se_##prefix##name(ulong, ulong, ulong, ulong, ulong, ulong, \ a9ad73295cc1e3 Sami Tolvanen 2024-03-11 40 ulong) \ a9ad73295cc1e3 Sami Tolvanen 2024-03-11 41 __attribute__((alias(__stringify(___se_##prefix##name)))); \ a9ad73295cc1e3 Sami Tolvanen 2024-03-11 42 __diag_pop(); \ 653650c468be21 Sami Tolvanen 2024-03-26 43 static long noinline ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 653650c468be21 Sami Tolvanen 2024-03-26 44 __used; \ a9ad73295cc1e3 Sami Tolvanen 2024-03-11 45 static long ___se_##prefix##name(__MAP(x,__SC_LONG,__VA_ARGS__)) a9ad73295cc1e3 Sami Tolvanen 2024-03-11 46 :::::: The code at line 39 was first introduced by commit :::::: a9ad73295cc1e3af0253eee7d08943b2419444c4 riscv: Fix syscall wrapper for >word-size arguments :::::: TO: Sami Tolvanen <[email protected]> :::::: CC: Palmer Dabbelt <[email protected]> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki