On 2/17/21 9:26 PM, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > head: f40ddce88593482919761f74910f42f4b84c004b > commit: c281634c865202e2776b0250678ff93c771947ff ARM: compat: remove KERNEL_DS usage in sys_oabi_epoll_ctl() > date: 10 months ago > config: arm-randconfig-m031-20210218 (attached as .config) > compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 > 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 > # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... > git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > git fetch --no-tags linus master > git checkout c281634c865202e2776b0250678ff93c771947ff > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp(a)intel.com&gt; > > All errors (new ones prefixed by >>): > > arch/arm/kernel/sys_oabi-compat.c:142:17: warning: no previous prototype for 'sys_oabi_stat64' [-Wmissing-prototypes] > 142 | asmlinkage long sys_oabi_stat64(const char __user * filename, > | ^~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:152:17: warning: no previous prototype for 'sys_oabi_lstat64' [-Wmissing-prototypes] > 152 | asmlinkage long sys_oabi_lstat64(const char __user * filename, > | ^~~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:162:17: warning: no previous prototype for 'sys_oabi_fstat64' [-Wmissing-prototypes] > 162 | asmlinkage long sys_oabi_fstat64(unsigned long fd, > | ^~~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:172:17: warning: no previous prototype for 'sys_oabi_fstatat64' [-Wmissing-prototypes] > 172 | asmlinkage long sys_oabi_fstatat64(int dfd, > | ^~~~~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:229:17: warning: no previous prototype for 'sys_oabi_fcntl64' [-Wmissing-prototypes] > 229 | asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd, > | ^~~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:251:17: warning: no previous prototype for 'sys_oabi_epoll_ctl' [-Wmissing-prototypes] > 251 | asmlinkage long sys_oabi_epoll_ctl(int epfd, int op, int fd, > | ^~~~~~~~~~~~~~~~~~ > In file included from include/linux/kernel.h:11, > from include/linux/list.h:9, > from include/linux/wait.h:7, > from include/linux/wait_bit.h:8, > from include/linux/fs.h:6, > from include/uapi/linux/aio_abi.h:31, > from include/linux/syscalls.h:74, > from arch/arm/kernel/sys_oabi-compat.c:73: > arch/arm/kernel/sys_oabi-compat.c: In function 'sys_oabi_epoll_ctl': >>> arch/arm/kernel/sys_oabi-compat.c:257:6: error: implicit declaration of function 'ep_op_has_event' [-Werror=implicit-function-declaration] > 257 | if (ep_op_has_event(op) && > | ^~~~~~~~~~~~~~~ > include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' > 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) > | ^~~~ > arch/arm/kernel/sys_oabi-compat.c:257:2: note: in expansion of macro 'if' > 257 | if (ep_op_has_event(op) && > | ^~ >>> arch/arm/kernel/sys_oabi-compat.c:264:9: error: implicit declaration of function 'do_epoll_ctl'; did you mean 'sys_epoll_ctl'? [-Werror=implicit-function-declaration] > 264 | return do_epoll_ctl(epfd, op, fd, &kernel, false); > | ^~~~~~~~~~~~ > | sys_epoll_ctl > arch/arm/kernel/sys_oabi-compat.c: At top level: > arch/arm/kernel/sys_oabi-compat.c:267:17: warning: no previous prototype for 'sys_oabi_epoll_wait' [-Wmissing-prototypes] > 267 | asmlinkage long sys_oabi_epoll_wait(int epfd, > | ^~~~~~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:309:17: warning: no previous prototype for 'sys_oabi_semtimedop' [-Wmissing-prototypes] > 309 | asmlinkage long sys_oabi_semtimedop(int semid, > | ^~~~~~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:352:17: warning: no previous prototype for 'sys_oabi_semop' [-Wmissing-prototypes] > 352 | asmlinkage long sys_oabi_semop(int semid, struct oabi_sembuf __user *tsops, > | ^~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:358:16: warning: no previous prototype for 'sys_oabi_ipc' [-Wmissing-prototypes] > 358 | asmlinkage int sys_oabi_ipc(uint call, int first, int second, int third, > | ^~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:376:17: warning: no previous prototype for 'sys_oabi_bind' [-Wmissing-prototypes] > 376 | asmlinkage long sys_oabi_bind(int fd, struct sockaddr __user *addr, int addrlen) > | ^~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:386:17: warning: no previous prototype for 'sys_oabi_connect' [-Wmissing-prototypes] > 386 | asmlinkage long sys_oabi_connect(int fd, struct sockaddr __user *addr, int addrlen) > | ^~~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:396:17: warning: no previous prototype for 'sys_oabi_sendto' [-Wmissing-prototypes] > 396 | asmlinkage long sys_oabi_sendto(int fd, void __user *buff, > | ^~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:409:17: warning: no previous prototype for 'sys_oabi_sendmsg' [-Wmissing-prototypes] > 409 | asmlinkage long sys_oabi_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags) > | ^~~~~~~~~~~~~~~~ > arch/arm/kernel/sys_oabi-compat.c:435:17: warning: no previous prototype for 'sys_oabi_socketcall' [-Wmissing-prototypes] > 435 | asmlinkage long sys_oabi_socketcall(int call, unsigned long __user *args) > | ^~~~~~~~~~~~~~~~~~~ > cc1: some warnings being treated as errors > > > vim +/ep_op_has_event +257 arch/arm/kernel/sys_oabi-compat.c > > > 73 #include <linux/syscalls.h> > 74 #include <linux/errno.h> > 75 #include <linux/fs.h> > 76 #include <linux/cred.h> > 77 #include <linux/fcntl.h> > 78 #include <linux/eventpoll.h> > 79 #include <linux/sem.h> > 80 #include <linux/socket.h> > 81 #include <linux/net.h> > 82 #include <linux/ipc.h> > 83 #include <linux/uaccess.h> > 84 #include <linux/slab.h> > 85 > 86 struct oldabi_stat64 { > 87 unsigned long long st_dev; > 88 unsigned int __pad1; > 89 unsigned long __st_ino; > 90 unsigned int st_mode; > 91 unsigned int st_nlink; > 92 > 93 unsigned long st_uid; > 94 unsigned long st_gid; > 95 > 96 unsigned long long st_rdev; > 97 unsigned int __pad2; > 98 > 99 long long st_size; > 100 unsigned long st_blksize; > 101 unsigned long long st_blocks; > 102 > 103 unsigned long st_atime; > 104 unsigned long st_atime_nsec; > 105 > 106 unsigned long st_mtime; > 107 unsigned long st_mtime_nsec; > 108 > 109 unsigned long st_ctime; > 110 unsigned long st_ctime_nsec; > 111 > 112 unsigned long long st_ino; > 113 } __attribute__ ((packed,aligned(4))); > 114 > 115 static long cp_oldabi_stat64(struct kstat *stat, > 116 struct oldabi_stat64 __user *statbuf) > 117 { > 118 struct oldabi_stat64 tmp; > 119 > 120 tmp.st_dev = huge_encode_dev(stat->dev); > 121 tmp.__pad1 = 0; > 122 tmp.__st_ino = stat->ino; > 123 tmp.st_mode = stat->mode; > 124 tmp.st_nlink = stat->nlink; > 125 tmp.st_uid = from_kuid_munged(current_user_ns(), stat->uid); > 126 tmp.st_gid = from_kgid_munged(current_user_ns(), stat->gid); > 127 tmp.st_rdev = huge_encode_dev(stat->rdev); > 128 tmp.st_size = stat->size; > 129 tmp.st_blocks = stat->blocks; > 130 tmp.__pad2 = 0; > 131 tmp.st_blksize = stat->blksize; > 132 tmp.st_atime = stat->atime.tv_sec; > 133 tmp.st_atime_nsec = stat->atime.tv_nsec; > 134 tmp.st_mtime = stat->mtime.tv_sec; > 135 tmp.st_mtime_nsec = stat->mtime.tv_nsec; > 136 tmp.st_ctime = stat->ctime.tv_sec; > 137 tmp.st_ctime_nsec = stat->ctime.tv_nsec; > 138 tmp.st_ino = stat->ino; > 139 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; > 140 } > 141 > 142 asmlinkage long sys_oabi_stat64(const char __user * filename, > 143 struct oldabi_stat64 __user * statbuf) > 144 { > 145 struct kstat stat; > 146 int error = vfs_stat(filename, &stat); > 147 if (!error) > 148 error = cp_oldabi_stat64(&stat, statbuf); > 149 return error; > 150 } > 151 > 152 asmlinkage long sys_oabi_lstat64(const char __user * filename, > 153 struct oldabi_stat64 __user * statbuf) > 154 { > 155 struct kstat stat; > 156 int error = vfs_lstat(filename, &stat); > 157 if (!error) > 158 error = cp_oldabi_stat64(&stat, statbuf); > 159 return error; > 160 } > 161 > 162 asmlinkage long sys_oabi_fstat64(unsigned long fd, > 163 struct oldabi_stat64 __user * statbuf) > 164 { > 165 struct kstat stat; > 166 int error = vfs_fstat(fd, &stat); > 167 if (!error) > 168 error = cp_oldabi_stat64(&stat, statbuf); > 169 return error; > 170 } > 171 > 172 asmlinkage long sys_oabi_fstatat64(int dfd, > 173 const char __user *filename, > 174 struct oldabi_stat64 __user *statbuf, > 175 int flag) > 176 { > 177 struct kstat stat; > 178 int error; > 179 > 180 error = vfs_fstatat(dfd, filename, &stat, flag); > 181 if (error) > 182 return error; > 183 return cp_oldabi_stat64(&stat, statbuf); > 184 } > 185 > 186 struct oabi_flock64 { > 187 short l_type; > 188 short l_whence; > 189 loff_t l_start; > 190 loff_t l_len; > 191 pid_t l_pid; > 192 } __attribute__ ((packed,aligned(4))); > 193 > 194 static long do_locks(unsigned int fd, unsigned int cmd, > 195 unsigned long arg) > 196 { > 197 struct flock64 kernel; > 198 struct oabi_flock64 user; > 199 mm_segment_t fs; > 200 long ret; > 201 > 202 if (copy_from_user(&user, (struct oabi_flock64 __user *)arg, > 203 sizeof(user))) > 204 return -EFAULT; > 205 kernel.l_type = user.l_type; > 206 kernel.l_whence = user.l_whence; > 207 kernel.l_start = user.l_start; > 208 kernel.l_len = user.l_len; > 209 kernel.l_pid = user.l_pid; > 210 > 211 fs = get_fs(); > 212 set_fs(KERNEL_DS); > 213 ret = sys_fcntl64(fd, cmd, (unsigned long)&kernel); > 214 set_fs(fs); > 215 > 216 if (!ret && (cmd == F_GETLK64 || cmd == F_OFD_GETLK)) { > 217 user.l_type = kernel.l_type; > 218 user.l_whence = kernel.l_whence; > 219 user.l_start = kernel.l_start; > 220 user.l_len = kernel.l_len; > 221 user.l_pid = kernel.l_pid; > 222 if (copy_to_user((struct oabi_flock64 __user *)arg, > 223 &user, sizeof(user))) > 224 ret = -EFAULT; > 225 } > 226 return ret; > 227 } > 228 > 229 asmlinkage long sys_oabi_fcntl64(unsigned int fd, unsigned int cmd, > 230 unsigned long arg) > 231 { > 232 switch (cmd) { > 233 case F_OFD_GETLK: > 234 case F_OFD_SETLK: > 235 case F_OFD_SETLKW: > 236 case F_GETLK64: > 237 case F_SETLK64: > 238 case F_SETLKW64: > 239 return do_locks(fd, cmd, arg); > 240 > 241 default: > 242 return sys_fcntl64(fd, cmd, arg); > 243 } > 244 } > 245 > 246 struct oabi_epoll_event { > 247 __u32 events; > 248 __u64 data; > 249 } __attribute__ ((packed,aligned(4))); > 250 > 251 asmlinkage long sys_oabi_epoll_ctl(int epfd, int op, int fd, > 252 struct oabi_epoll_event __user *event) > 253 { > 254 struct oabi_epoll_event user; > 255 struct epoll_event kernel; > 256 > > 257 if (ep_op_has_event(op) && > 258 copy_from_user(&user, event, sizeof(user))) > 259 return -EFAULT; > 260 > 261 kernel.events = user.events; > 262 kernel.data = user.data; > 263 > > 264 return do_epoll_ctl(epfd, op, fd, &kernel, false); > 265 } > 266 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org I sent a patch for this on 2021-JAN-14. Russell?