tree: https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git vectorized-scrub head: 142ad7efefdd71fa40628c868530a9357c18ba27 commit: 76d00130dc943feaf66ea28353b9975a2f4213d1 [70/303] xfs: repair damaged symlinks config: riscv-randconfig-c006-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 2c6448cdc2f68f8c28fd0bd9404182b81306e6e6) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git/comm... git remote add djwong-xfs https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git git fetch --no-tags djwong-xfs vectorized-scrub git checkout 76d00130dc943feaf66ea28353b9975a2f4213d1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; clang-analyzer warnings: (new ones prefixed by >>) 10 warnings generated. Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 10 warnings generated. Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 10 warnings generated. Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 10 warnings generated. Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 10 warnings generated. Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 11 warnings generated. drivers/media/i2c/imx258.c:781:3: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = imx258_write_reg(imx258, IMX258_REG_TEST_PATTERN, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/media/i2c/imx258.c:781:3: note: Value stored to 'ret' is never read ret = imx258_write_reg(imx258, IMX258_REG_TEST_PATTERN, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 10 warnings generated. Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 12 warnings generated. drivers/iio/imu/inv_mpu6050/inv_mpu_core.c:713:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = inv_mpu6050_sensor_show(st, st->reg->gyro_offset, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/iio/imu/inv_mpu6050/inv_mpu_core.c:713:4: note: Value stored to 'ret' is never read ret = inv_mpu6050_sensor_show(st, st->reg->gyro_offset, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/iio/imu/inv_mpu6050/inv_mpu_core.c:719:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores] ret = inv_mpu6050_sensor_show(st, st->reg->accl_offset, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/iio/imu/inv_mpu6050/inv_mpu_core.c:719:4: note: Value stored to 'ret' is never read ret = inv_mpu6050_sensor_show(st, st->reg->accl_offset, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 12 warnings generated. fs/ntfs/runlist.c:1764:4: warning: Value stored to 'rl_end' is never read [clang-analyzer-deadcode.DeadStores] rl_end = trl + (rl_end - runlist->rl); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/ntfs/runlist.c:1764:4: note: Value stored to 'rl_end' is never read rl_end = trl + (rl_end - runlist->rl); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/ntfs/runlist.c:1834:4: warning: Value stored to 'rl_end' is never read [clang-analyzer-deadcode.DeadStores] rl_end = trl + (rl_end - runlist->rl); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/ntfs/runlist.c:1834:4: note: Value stored to 'rl_end' is never read rl_end = trl + (rl_end - runlist->rl); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/ntfs/runlist.c:1866:2: warning: Value stored to 'old_size' is never read [clang-analyzer-deadcode.DeadStores] old_size += 2; ^ ~ fs/ntfs/runlist.c:1866:2: note: Value stored to 'old_size' is never read old_size += 2; ^ ~ fs/ntfs/runlist.c:1869:3: warning: Value stored to 'rl_end' is never read [clang-analyzer-deadcode.DeadStores] rl_end = trl + (rl_end - runlist->rl); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/ntfs/runlist.c:1869:3: note: Value stored to 'rl_end' is never read rl_end = trl + (rl_end - runlist->rl); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 10 warnings generated. Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 7 warnings generated. Suppressed 7 warnings (7 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 8 warnings generated. Suppressed 8 warnings (8 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 9 warnings generated. Suppressed 9 warnings (9 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 9 warnings generated. Suppressed 9 warnings (9 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 9 warnings generated. Suppressed 9 warnings (9 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 11 warnings generated. resblks -= fs_blocks; ^ ~~~~~~~~~ fs/xfs/xfs_symlink.c:176:2: note: Value stored to 'resblks' is never read resblks -= fs_blocks; ^ ~~~~~~~~~ Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 13 warnings generated. include/linux/completion.h:86:10: warning: Access to field 'done' results in a dereference of a null pointer (loaded from variable 'x') [clang-analyzer-core.NullDereference] x->done = 0; ^ fs/xfs/xfs_sysfs.c:686:25: note: Passing value via 1st parameter 'kobj' error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype, ^~~~~~~~~~~~~~~~~ fs/xfs/xfs_sysfs.c:686:10: note: Calling 'xfs_sysfs_init' error = xfs_sysfs_init(&mp->m_error_kobj, &xfs_error_ktype, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/xfs/xfs_sysfs.h:37:11: note: Assuming 'parent_kobj' is null parent = parent_kobj ? &parent_kobj->kobject : NULL; ^~~~~~~~~~~ fs/xfs/xfs_sysfs.h:37:11: note: '?' condition is false fs/xfs/xfs_sysfs.h:38:18: note: Passing value via 1st parameter 'x' init_completion(&kobj->complete); ^~~~~~~~~~~~~~~ fs/xfs/xfs_sysfs.h:38:2: note: Calling 'init_completion' init_completion(&kobj->complete); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/completion.h:86:10: note: Access to field 'done' results in a dereference of a null pointer (loaded from variable 'x') x->done = 0; ~ ^ Suppressed 12 warnings (12 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 12 warnings generated. Suppressed 12 warnings (12 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 10 warnings generated. Suppressed 10 warnings (10 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 9 warnings generated. Suppressed 9 warnings (9 in non-user code). Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 17 warnings generated. net/netfilter/nfnetlink_log.c:573:45: warning: Access to field 'type' results in a dereference of a null pointer (loaded from field 'dev') [clang-analyzer-core.NullDereference] if (nla_put_be16(inst->skb, NFULA_HWTYPE, htons(skb->dev->type)) || ^ include/linux/byteorder/generic.h:141:18: note: expanded from macro 'htons' #define htons(x) ___htons(x) ^ ~ include/linux/byteorder/generic.h:135:21: note: expanded from macro '___htons' #define ___htons(x) __cpu_to_be16(x) ^ ~ include/uapi/linux/byteorder/little_endian.h:41:43: note: expanded from macro '__cpu_to_be16' #define __cpu_to_be16(x) ((__force __be16)__swab16((x))) ^ ~ include/uapi/linux/swab.h:105:31: note: expanded from macro '__swab16' (__builtin_constant_p((__u16)(x)) ? \ ^~ net/netfilter/nfnetlink_log.c:465:28: note: '?' condition is false 0, pf, NFNETLINK_V0, htons(inst->group_num)); ^ include/linux/byteorder/generic.h:141:18: note: expanded from macro 'htons' #define htons(x) ___htons(x) ^ include/linux/byteorder/generic.h:135:21: note: expanded from macro '___htons' #define ___htons(x) __cpu_to_be16(x) ^ include/uapi/linux/byteorder/little_endian.h:41:43: note: expanded from macro '__cpu_to_be16' #define __cpu_to_be16(x) ((__force __be16)__swab16((x))) ^ include/uapi/linux/swab.h:105:3: note: expanded from macro '__swab16' (__builtin_constant_p((__u16)(x)) ? \ ^ net/netfilter/nfnetlink_log.c:463:8: note: Calling 'nfnl_msg_put' nlh = nfnl_msg_put(inst->skb, 0, 0, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netfilter/nfnetlink.h:86:8: note: Calling 'nlmsg_put' nlh = nlmsg_put(skb, portid, seq, type, sizeof(struct nfgenmsg), flags); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/net/netlink.h:917:15: note: Assuming the condition is false if (unlikely(skb_tailroom(skb) < nlmsg_total_size(payload))) ^ include/linux/compiler.h:78:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ include/net/netlink.h:917:2: note: Taking false branch if (unlikely(skb_tailroom(skb) < nlmsg_total_size(payload))) ^ include/net/netlink.h:920:2: note: Returning pointer, which participates in a condition later return __nlmsg_put(skb, portid, seq, type, payload, flags); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netfilter/nfnetlink.h:86:8: note: Returning from 'nlmsg_put' nlh = nlmsg_put(skb, portid, seq, type, sizeof(struct nfgenmsg), flags); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/netfilter/nfnetlink.h:87:6: note: Assuming 'nlh' is non-null, which participates in a condition later if (!nlh) ^~~~ include/linux/netfilter/nfnetlink.h:87:2: note: Taking false branch if (!nlh) ^ include/linux/netfilter/nfnetlink.h:92:2: note: Returning pointer (loaded from 'nlh'), which participates in a condition later vim +/resblks +176 fs/xfs/xfs_symlink.c 135 136 /* Write the symlink target into the inode. */ 137 int 138 xfs_symlink_write_target( 139 struct xfs_trans *tp, 140 struct xfs_inode *ip, 141 const char *target_path, 142 int pathlen, 143 xfs_fsblock_t fs_blocks, 144 uint resblks) 145 { 146 struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS]; 147 struct xfs_mount *mp = tp->t_mountp; 148 const char *cur_chunk; 149 struct xfs_buf *bp; 150 xfs_daddr_t d; 151 int byte_cnt; 152 int nmaps; 153 int offset = 0; 154 int n; 155 int error; 156 157 /* 158 * If the symlink will fit into the inode, write it inline. 159 */ 160 if (pathlen <= XFS_IFORK_DSIZE(ip)) { 161 xfs_init_local_fork(ip, XFS_DATA_FORK, target_path, pathlen); 162 163 ip->i_disk_size = pathlen; 164 ip->i_df.if_format = XFS_DINODE_FMT_LOCAL; 165 xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); 166 i_size_write(VFS_I(ip), ip->i_disk_size); 167 return 0; 168 } 169 170 nmaps = XFS_SYMLINK_MAPS; 171 error = xfs_bmapi_write(tp, ip, 0, fs_blocks, XFS_BMAPI_METADATA, 172 resblks, mval, &nmaps); 173 if (error) 174 return error; 175 177 ip->i_disk_size = pathlen; 178 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); 179 180 cur_chunk = target_path; 181 offset = 0; 182 for (n = 0; n < nmaps; n++) { 183 char *buf; 184 185 d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); 186 byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); 187 error = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, 188 BTOBB(byte_cnt), 0, &bp); 189 if (error) 190 return error; 191 bp->b_ops = &xfs_symlink_buf_ops; 192 193 byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt); 194 byte_cnt = min(byte_cnt, pathlen); 195 196 buf = bp->b_addr; 197 buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset, byte_cnt, 198 bp); 199 200 memcpy(buf, cur_chunk, byte_cnt); 201 202 cur_chunk += byte_cnt; 203 pathlen -= byte_cnt; 204 offset += byte_cnt; 205 206 xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF); 207 xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) - 208 (char *)bp->b_addr); 209 } 210 ASSERT(pathlen == 0); 211 i_size_write(VFS_I(ip), ip->i_disk_size); 212 return 0; 213 } 214 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org