Hi Chris, Thank you for the patch! Yet something to improve: [auto build test ERROR on linux/master] [also build test ERROR on kees/for-next/seccomp kees/for-next/pstore linus/master v5.11-rc6 next-20210125] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Chris-Wilson/kernel-Expose-SYS_kcmp-by-default/20210206-004006 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2ab38c17aac10bf55ab3efde4c4db3893d8691d2 config: powerpc-randconfig-r023-20210205 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://github.com/0day-ci/linux/commit/f7694e48ae81aac5a226e74421dbda1dcdc3ca92 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Chris-Wilson/kernel-Expose-SYS_kcmp-by-default/20210206-004006 git checkout f7694e48ae81aac5a226e74421dbda1dcdc3ca92 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All error/warnings (new ones prefixed by >>): In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:190:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:557:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from kernel/kcmp.c:3: In file included from include/linux/syscalls.h:84: In file included from include/trace/syscall.h:7: In file included from include/linux/trace_events.h:9: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:192:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:558:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from kernel/kcmp.c:3: In file included from include/linux/syscalls.h:84: In file included from include/trace/syscall.h:7: In file included from include/linux/trace_events.h:9: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:194:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:559:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from kernel/kcmp.c:3: In file included from include/linux/syscalls.h:84: In file included from include/trace/syscall.h:7: In file included from include/linux/trace_events.h:9: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:196:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:560:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from kernel/kcmp.c:3: In file included from include/linux/syscalls.h:84: In file included from include/trace/syscall.h:7: In file included from include/linux/trace_events.h:9: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:198:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> kernel/kcmp.c:117:13: error: implicit declaration of function 'get_epoll_tfile_raw_ptr' [-Werror,-Wimplicit-function-declaration] filp_tgt = get_epoll_tfile_raw_ptr(filp_epoll, slot.tfd, slot.toff); ^ kernel/kcmp.c:117:13: note: did you mean 'get_file_raw_ptr'? kernel/kcmp.c:62:1: note: 'get_file_raw_ptr' declared here get_file_raw_ptr(struct task_struct *task, unsigned int idx) ^ >> kernel/kcmp.c:117:11: warning: incompatible integer to pointer conversion assigning to 'struct file *' from 'int' [-Wint-conversion] filp_tgt = get_epoll_tfile_raw_ptr(filp_epoll, slot.tfd, slot.toff); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 13 warnings and 1 error generated. vim +/get_epoll_tfile_raw_ptr +117 kernel/kcmp.c d97b46a64674a2 Cyrill Gorcunov 2012-05-31 96 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 97 #ifdef CONFIG_EPOLL 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 98 static int kcmp_epoll_target(struct task_struct *task1, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 99 struct task_struct *task2, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 100 unsigned long idx1, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 101 struct kcmp_epoll_slot __user *uslot) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 102 { 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 103 struct file *filp, *filp_epoll, *filp_tgt; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 104 struct kcmp_epoll_slot slot; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 105 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 106 if (copy_from_user(&slot, uslot, sizeof(slot))) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 107 return -EFAULT; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 108 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 109 filp = get_file_raw_ptr(task1, idx1); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 110 if (!filp) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 111 return -EBADF; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 112 f43c283a89a7dc Eric W. Biederman 2020-11-20 113 filp_epoll = fget_task(task2, slot.efd); f43c283a89a7dc Eric W. Biederman 2020-11-20 114 if (!filp_epoll) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 115 return -EBADF; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 116 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 @117 filp_tgt = get_epoll_tfile_raw_ptr(filp_epoll, slot.tfd, slot.toff); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 118 fput(filp_epoll); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 119 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 120 if (IS_ERR(filp_tgt)) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 121 return PTR_ERR(filp_tgt); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 122 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 123 return kcmp_ptr(filp, filp_tgt, KCMP_FILE); 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 124 } 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 125 #else 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 126 static int kcmp_epoll_target(struct task_struct *task1, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 127 struct task_struct *task2, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 128 unsigned long idx1, 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 129 struct kcmp_epoll_slot __user *uslot) 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 130 { 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 131 return -EOPNOTSUPP; 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 132 } 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 133 #endif 0791e3644e5ef2 Cyrill Gorcunov 2017-07-12 134 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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