tree: https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android12-5.10 head: 87a74496ed4a51378b6b01606639d71113b040e5 commit: fe50dcab7ae21c88bdde199e04978903b3ebff4d [9986/9999] UPSTREAM: mm: wire up syscall process_mrelease config: x86_64-randconfig-a011 (https://download.01.org/0day-ci/archive/20220113/202201132036.zLX4pFMK-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/ammarfaizi2/linux-block/commit/fe50dcab7ae21c88bdde199... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android12-5.10 git checkout fe50dcab7ae21c88bdde199e04978903b3ebff4d # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:279:1: note: in expansion of macro 'COND_SYSCALL' 279 | COND_SYSCALL(mlockall); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_munlockall' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' 256 | __X64_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:280:1: note: in expansion of macro 'COND_SYSCALL' 280 | COND_SYSCALL(munlockall); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_munlockall' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' 120 | __COND_SYSCALL(ia32, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' 257 | __IA32_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:280:1: note: in expansion of macro 'COND_SYSCALL' 280 | COND_SYSCALL(munlockall); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_mincore' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' 256 | __X64_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:281:1: note: in expansion of macro 'COND_SYSCALL' 281 | COND_SYSCALL(mincore); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_mincore' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' 120 | __COND_SYSCALL(ia32, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' 257 | __IA32_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:281:1: note: in expansion of macro 'COND_SYSCALL' 281 | COND_SYSCALL(mincore); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_madvise' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' 256 | __X64_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:282:1: note: in expansion of macro 'COND_SYSCALL' 282 | COND_SYSCALL(madvise); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_madvise' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' 120 | __COND_SYSCALL(ia32, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' 257 | __IA32_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:282:1: note: in expansion of macro 'COND_SYSCALL' 282 | COND_SYSCALL(madvise); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_process_madvise' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' 256 | __X64_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:283:1: note: in expansion of macro 'COND_SYSCALL' 283 | COND_SYSCALL(process_madvise); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_process_madvise' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' 120 | __COND_SYSCALL(ia32, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' 257 | __IA32_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:283:1: note: in expansion of macro 'COND_SYSCALL' 283 | COND_SYSCALL(process_madvise); | ^~~~~~~~~~~~ 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' 256 | __X64_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:284:1: note: in expansion of macro 'COND_SYSCALL' 284 | COND_SYSCALL(process_mrelease); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_process_mrelease' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' 120 | __COND_SYSCALL(ia32, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' 257 | __IA32_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:284:1: note: in expansion of macro 'COND_SYSCALL' 284 | COND_SYSCALL(process_mrelease); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_remap_file_pages' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' 256 | __X64_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:285:1: note: in expansion of macro 'COND_SYSCALL' 285 | COND_SYSCALL(remap_file_pages); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_remap_file_pages' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' 120 | __COND_SYSCALL(ia32, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' 257 | __IA32_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:285:1: note: in expansion of macro 'COND_SYSCALL' 285 | COND_SYSCALL(remap_file_pages); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_mbind' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:256:2: note: in expansion of macro '__X64_COND_SYSCALL' 256 | __X64_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:286:1: note: in expansion of macro 'COND_SYSCALL' 286 | COND_SYSCALL(mbind); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_sys_mbind' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:120:2: note: in expansion of macro '__COND_SYSCALL' 120 | __COND_SYSCALL(ia32, sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:257:2: note: in expansion of macro '__IA32_COND_SYSCALL' 257 | __IA32_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:286:1: note: in expansion of macro 'COND_SYSCALL' 286 | COND_SYSCALL(mbind); | ^~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__ia32_compat_sys_mbind' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:148:2: note: in expansion of macro '__COND_SYSCALL' 148 | __COND_SYSCALL(ia32, compat_sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:218:2: note: in expansion of macro '__IA32_COMPAT_COND_SYSCALL' 218 | __IA32_COMPAT_COND_SYSCALL(name) \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:287:1: note: in expansion of macro 'COND_SYSCALL_COMPAT' 287 | COND_SYSCALL_COMPAT(mbind); | ^~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x32_compat_sys_mbind' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:175:2: note: in expansion of macro '__COND_SYSCALL' 175 | __COND_SYSCALL(x32, compat_sys_##name) | ^~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:219:2: note: in expansion of macro '__X32_COMPAT_COND_SYSCALL' 219 | __X32_COMPAT_COND_SYSCALL(name) | ^~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sys_ni.c:287:1: note: in expansion of macro 'COND_SYSCALL_COMPAT' 287 | COND_SYSCALL_COMPAT(mbind); | ^~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/syscall_wrapper.h:83:14: warning: no previous prototype for '__x64_sys_get_mempolicy' [-Wmissing-prototypes] 83 | __weak long __##abi##_##name(const struct pt_regs *__unused) \ | ^~ arch/x86/include/asm/syscall_wrapper.h:100:2: note: in expansion of macro '__COND_SYSCALL' 100 | __COND_SYSCALL(x64, sys_##name) vim +/__x64_sys_process_mrelease +83 arch/x86/include/asm/syscall_wrapper.h cc42c045af1ff4 Brian Gerst 2020-03-13 13 25c619e59b395a Brian Gerst 2020-03-13 14 /* 25c619e59b395a Brian Gerst 2020-03-13 15 * Instead of the generic __SYSCALL_DEFINEx() definition, the x86 version takes 25c619e59b395a Brian Gerst 2020-03-13 16 * struct pt_regs *regs as the only argument of the syscall stub(s) named as: 25c619e59b395a Brian Gerst 2020-03-13 17 * __x64_sys_*() - 64-bit native syscall 25c619e59b395a Brian Gerst 2020-03-13 18 * __ia32_sys_*() - 32-bit native syscall or common compat syscall 25c619e59b395a Brian Gerst 2020-03-13 19 * __ia32_compat_sys_*() - 32-bit compat syscall 25c619e59b395a Brian Gerst 2020-03-13 20 * __x32_compat_sys_*() - 64-bit X32 compat syscall 25c619e59b395a Brian Gerst 2020-03-13 21 * 25c619e59b395a Brian Gerst 2020-03-13 22 * The registers are decoded according to the ABI: 25c619e59b395a Brian Gerst 2020-03-13 23 * 64-bit: RDI, RSI, RDX, R10, R8, R9 25c619e59b395a Brian Gerst 2020-03-13 24 * 32-bit: EBX, ECX, EDX, ESI, EDI, EBP 25c619e59b395a Brian Gerst 2020-03-13 25 * 25c619e59b395a Brian Gerst 2020-03-13 26 * The stub then passes the decoded arguments to the __se_sys_*() wrapper to 25c619e59b395a Brian Gerst 2020-03-13 27 * perform sign-extension (omitted for zero-argument syscalls). Finally the 25c619e59b395a Brian Gerst 2020-03-13 28 * arguments are passed to the __do_sys_*() function which is the actual 25c619e59b395a Brian Gerst 2020-03-13 29 * syscall. These wrappers are marked as inline so the compiler can optimize 25c619e59b395a Brian Gerst 2020-03-13 30 * the functions where appropriate. 25c619e59b395a Brian Gerst 2020-03-13 31 * 25c619e59b395a Brian Gerst 2020-03-13 32 * Example assembly (slightly re-ordered for better readability): 25c619e59b395a Brian Gerst 2020-03-13 33 * 25c619e59b395a Brian Gerst 2020-03-13 34 * <__x64_sys_recv>: <-- syscall with 4 parameters 25c619e59b395a Brian Gerst 2020-03-13 35 * callq <__fentry__> 25c619e59b395a Brian Gerst 2020-03-13 36 * 25c619e59b395a Brian Gerst 2020-03-13 37 * mov 0x70(%rdi),%rdi <-- decode regs->di 25c619e59b395a Brian Gerst 2020-03-13 38 * mov 0x68(%rdi),%rsi <-- decode regs->si 25c619e59b395a Brian Gerst 2020-03-13 39 * mov 0x60(%rdi),%rdx <-- decode regs->dx 25c619e59b395a Brian Gerst 2020-03-13 40 * mov 0x38(%rdi),%rcx <-- decode regs->r10 25c619e59b395a Brian Gerst 2020-03-13 41 * 25c619e59b395a Brian Gerst 2020-03-13 42 * xor %r9d,%r9d <-- clear %r9 25c619e59b395a Brian Gerst 2020-03-13 43 * xor %r8d,%r8d <-- clear %r8 25c619e59b395a Brian Gerst 2020-03-13 44 * 25c619e59b395a Brian Gerst 2020-03-13 45 * callq __sys_recvfrom <-- do the actual work in __sys_recvfrom() 25c619e59b395a Brian Gerst 2020-03-13 46 * which takes 6 arguments 25c619e59b395a Brian Gerst 2020-03-13 47 * 25c619e59b395a Brian Gerst 2020-03-13 48 * cltq <-- extend return value to 64-bit 25c619e59b395a Brian Gerst 2020-03-13 49 * retq <-- return 25c619e59b395a Brian Gerst 2020-03-13 50 * 25c619e59b395a Brian Gerst 2020-03-13 51 * This approach avoids leaking random user-provided register content down 25c619e59b395a Brian Gerst 2020-03-13 52 * the call chain. 25c619e59b395a Brian Gerst 2020-03-13 53 */ 25c619e59b395a Brian Gerst 2020-03-13 54 ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 55 /* Mapping of registers to parameters for syscalls on x86-64 and x32 */ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 56 #define SC_X86_64_REGS_TO_ARGS(x, ...) \ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 57 __MAP(x,__SC_ARGS \ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 58 ,,regs->di,,regs->si,,regs->dx \ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 59 ,,regs->r10,,regs->r8,,regs->r9) \ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 60 ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 61 /* Mapping of registers to parameters for syscalls on i386 */ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 62 #define SC_IA32_REGS_TO_ARGS(x, ...) \ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 63 __MAP(x,__SC_ARGS \ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 64 ,,(unsigned int)regs->bx,,(unsigned int)regs->cx \ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 65 ,,(unsigned int)regs->dx,,(unsigned int)regs->si \ ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 66 ,,(unsigned int)regs->di,,(unsigned int)regs->bp) ebeb8c82ffaf94 Dominik Brodowski 2018-04-05 67 d2b5de495ee983 Brian Gerst 2020-03-13 68 #define __SYS_STUB0(abi, name) \ 0f78ff17112d8b Brian Gerst 2020-03-13 69 long __##abi##_##name(const struct pt_regs *regs); \ d2b5de495ee983 Brian Gerst 2020-03-13 70 ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \ 0f78ff17112d8b Brian Gerst 2020-03-13 71 long __##abi##_##name(const struct pt_regs *regs) \ d2b5de495ee983 Brian Gerst 2020-03-13 72 __alias(__do_##name); d2b5de495ee983 Brian Gerst 2020-03-13 73 4399e0cf494f73 Brian Gerst 2020-03-13 74 #define __SYS_STUBx(abi, name, ...) \ 0f78ff17112d8b Brian Gerst 2020-03-13 75 long __##abi##_##name(const struct pt_regs *regs); \ 4399e0cf494f73 Brian Gerst 2020-03-13 76 ALLOW_ERROR_INJECTION(__##abi##_##name, ERRNO); \ 0f78ff17112d8b Brian Gerst 2020-03-13 77 long __##abi##_##name(const struct pt_regs *regs) \ 4399e0cf494f73 Brian Gerst 2020-03-13 78 { \ 4399e0cf494f73 Brian Gerst 2020-03-13 79 return __se_##name(__VA_ARGS__); \ 4399e0cf494f73 Brian Gerst 2020-03-13 80 } 4399e0cf494f73 Brian Gerst 2020-03-13 81 6cc8d2b286d9e7 Brian Gerst 2020-03-13 82 #define __COND_SYSCALL(abi, name) \ 0f78ff17112d8b Brian Gerst 2020-03-13 @83 __weak long __##abi##_##name(const struct pt_regs *__unused) \ 6cc8d2b286d9e7 Brian Gerst 2020-03-13 84 { \ 6cc8d2b286d9e7 Brian Gerst 2020-03-13 85 return sys_ni_syscall(); \ 6cc8d2b286d9e7 Brian Gerst 2020-03-13 86 } 6cc8d2b286d9e7 Brian Gerst 2020-03-13 87 :::::: The code at line 83 was first introduced by commit :::::: 0f78ff17112d8b3469b805ff4ea9780cc1e5c93b x86/entry: Drop asmlinkage from syscalls :::::: TO: Brian Gerst <brgerst(a)gmail.com&gt; :::::: CC: Thomas Gleixner <tglx(a)linutronix.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org