tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 372b2891c15acbf7b90d948b08ac174bde77102c commit: 185e297653a7e0431db813764d2efb9ffd09160c [8858/10077] fortify: Explicitly disable Clang support config: i386-randconfig-a016-20210824 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d26000e4cc2bc65e207a84fa26cb6e374d60aa12) 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/next/linux-next.git/commit/?id=185e297653a7e0431db813764d2efb9ffd09160c git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 185e297653a7e0431db813764d2efb9ffd09160c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): clang-14: warning: optimization flag '-falign-jumps=0' is not supported [-Wignored-optimization-argument] In file included from fs/statfs.c:2: In file included from include/linux/syscalls.h:76: In file included from include/uapi/linux/aio_abi.h:31: In file included from include/linux/fs.h:6: In file included from include/linux/wait_bit.h:8: In file included from include/linux/wait.h:9: In file included from include/linux/spinlock.h:51: In file included from include/linux/preempt.h:78: In file included from arch/x86/include/asm/preempt.h:7: In file included from include/linux/thread_info.h:60: arch/x86/include/asm/thread_info.h:172:13: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address] oldframe = __builtin_frame_address(1); ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/thread_info.h:174:11: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address] frame = __builtin_frame_address(2); ^~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from fs/statfs.c:2: In file included from include/linux/syscalls.h:87: In file included from include/trace/syscall.h:7: In file included from include/linux/trace_events.h:10: In file included from include/linux/perf_event.h:49: In file included from include/linux/ftrace.h:22: arch/x86/include/asm/ftrace.h:7:3: error: Compiler does not support fentry? # error Compiler does not support fentry? ^ In file included from fs/statfs.c:2: In file included from include/linux/syscalls.h:87: In file included from include/trace/syscall.h:7: In file included from include/linux/trace_events.h:10: In file included from include/linux/perf_event.h:49: include/linux/ftrace.h:843:9: warning: calling '__builtin_return_address' with a nonzero argument is unsafe [-Wframe-address] addr = CALLER_ADDR1; ^~~~~~~~~~~~ include/linux/ftrace.h:830:38: note: expanded from macro 'CALLER_ADDR1' #define CALLER_ADDR1 ((unsigned long)ftrace_return_address(1)) ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/ftrace.h:823:36: note: expanded from macro 'ftrace_return_address' # define ftrace_return_address(n) __builtin_return_address(n) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/ftrace.h:846:9: warning: calling '__builtin_return_address' with a nonzero argument is unsafe [-Wframe-address] return CALLER_ADDR2; ^~~~~~~~~~~~ include/linux/ftrace.h:831:38: note: expanded from macro 'CALLER_ADDR2' #define CALLER_ADDR2 ((unsigned long)ftrace_return_address(2)) ^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/ftrace.h:823:36: note: expanded from macro 'ftrace_return_address' # define ftrace_return_address(n) __builtin_return_address(n) ^~~~~~~~~~~~~~~~~~~~~~~~~~~ >> fs/statfs.c:131:3: warning: 'memcpy' will always overflow; destination buffer has size 64, but size argument is 84 [-Wfortify-source] memcpy(&buf, st, sizeof(*st)); ^ arch/x86/include/asm/string_32.h:182:25: note: expanded from macro 'memcpy' #define memcpy(t, f, n) __builtin_memcpy(t, f, n) ^ 5 warnings and 1 error generated. vim +/memcpy +131 fs/statfs.c c8b91accfa1059 Al Viro 2011-03-12 125 c8b91accfa1059 Al Viro 2011-03-12 126 static int do_statfs_native(struct kstatfs *st, struct statfs __user *p) c8b91accfa1059 Al Viro 2011-03-12 127 { c8b91accfa1059 Al Viro 2011-03-12 128 struct statfs buf; 7ed1ee6118ae77 Al Viro 2010-03-23 129 c8b91accfa1059 Al Viro 2011-03-12 130 if (sizeof(buf) == sizeof(*st)) c8b91accfa1059 Al Viro 2011-03-12 @131 memcpy(&buf, st, sizeof(*st)); 7ed1ee6118ae77 Al Viro 2010-03-23 132 else { c8b91accfa1059 Al Viro 2011-03-12 133 if (sizeof buf.f_blocks == 4) { c8b91accfa1059 Al Viro 2011-03-12 134 if ((st->f_blocks | st->f_bfree | st->f_bavail | c8b91accfa1059 Al Viro 2011-03-12 135 st->f_bsize | st->f_frsize) & 7ed1ee6118ae77 Al Viro 2010-03-23 136 0xffffffff00000000ULL) 7ed1ee6118ae77 Al Viro 2010-03-23 137 return -EOVERFLOW; 7ed1ee6118ae77 Al Viro 2010-03-23 138 /* 7ed1ee6118ae77 Al Viro 2010-03-23 139 * f_files and f_ffree may be -1; it's okay to stuff 7ed1ee6118ae77 Al Viro 2010-03-23 140 * that into 32 bits 7ed1ee6118ae77 Al Viro 2010-03-23 141 */ c8b91accfa1059 Al Viro 2011-03-12 142 if (st->f_files != -1 && c8b91accfa1059 Al Viro 2011-03-12 143 (st->f_files & 0xffffffff00000000ULL)) 7ed1ee6118ae77 Al Viro 2010-03-23 144 return -EOVERFLOW; c8b91accfa1059 Al Viro 2011-03-12 145 if (st->f_ffree != -1 && c8b91accfa1059 Al Viro 2011-03-12 146 (st->f_ffree & 0xffffffff00000000ULL)) 7ed1ee6118ae77 Al Viro 2010-03-23 147 return -EOVERFLOW; 7ed1ee6118ae77 Al Viro 2010-03-23 148 } 7ed1ee6118ae77 Al Viro 2010-03-23 149 c8b91accfa1059 Al Viro 2011-03-12 150 buf.f_type = st->f_type; c8b91accfa1059 Al Viro 2011-03-12 151 buf.f_bsize = st->f_bsize; c8b91accfa1059 Al Viro 2011-03-12 152 buf.f_blocks = st->f_blocks; c8b91accfa1059 Al Viro 2011-03-12 153 buf.f_bfree = st->f_bfree; c8b91accfa1059 Al Viro 2011-03-12 154 buf.f_bavail = st->f_bavail; c8b91accfa1059 Al Viro 2011-03-12 155 buf.f_files = st->f_files; c8b91accfa1059 Al Viro 2011-03-12 156 buf.f_ffree = st->f_ffree; c8b91accfa1059 Al Viro 2011-03-12 157 buf.f_fsid = st->f_fsid; c8b91accfa1059 Al Viro 2011-03-12 158 buf.f_namelen = st->f_namelen; c8b91accfa1059 Al Viro 2011-03-12 159 buf.f_frsize = st->f_frsize; c8b91accfa1059 Al Viro 2011-03-12 160 buf.f_flags = st->f_flags; c8b91accfa1059 Al Viro 2011-03-12 161 memset(buf.f_spare, 0, sizeof(buf.f_spare)); c8b91accfa1059 Al Viro 2011-03-12 162 } c8b91accfa1059 Al Viro 2011-03-12 163 if (copy_to_user(p, &buf, sizeof(buf))) c8b91accfa1059 Al Viro 2011-03-12 164 return -EFAULT; 7ed1ee6118ae77 Al Viro 2010-03-23 165 return 0; 7ed1ee6118ae77 Al Viro 2010-03-23 166 } 7ed1ee6118ae77 Al Viro 2010-03-23 167 :::::: The code at line 131 was first introduced by commit :::::: c8b91accfa1059d5565443193d89572eca2f5dd6 clean statfs-like syscalls up :::::: TO: Al Viro <viro@xxxxxxxxxxxxxxxxxx> :::::: CC: Al Viro <viro@xxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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