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charset=us-ascii Content-Disposition: inline tree: https://github.com/brauner/linux.git kernel-6.19.cred head: 59e578cf86c391d6595e005247ebefd4f371242c commit: b9455f57e32048146ad5b98fb477b96eba6e8ffd [12/39] backing-file: use credential guards for reads config: hexagon-randconfig-002-20251104 (https://download.01.org/0day-ci/archive/20251104/202511041731.OPKyrqmX-lkp@intel.com/config) compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251104/202511041731.OPKyrqmX-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202511041731.OPKyrqmX-lkp@intel.com/ All warnings (new ones prefixed by >>): >> fs/backing-file.c:209:9: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] return ret; ^~~ fs/backing-file.c:191:13: note: initialize the variable 'ret' to silence this warning ssize_t ret; ^ = 0 1 warning generated. vim +/ret +209 fs/backing-file.c b9455f57e320481 Christian Brauner 2025-11-03 186 b9455f57e320481 Christian Brauner 2025-11-03 187 ssize_t backing_file_read_iter(struct file *file, struct iov_iter *iter, b9455f57e320481 Christian Brauner 2025-11-03 188 struct kiocb *iocb, int flags, b9455f57e320481 Christian Brauner 2025-11-03 189 struct backing_file_ctx *ctx) b9455f57e320481 Christian Brauner 2025-11-03 190 { b9455f57e320481 Christian Brauner 2025-11-03 191 ssize_t ret; b9455f57e320481 Christian Brauner 2025-11-03 192 b9455f57e320481 Christian Brauner 2025-11-03 193 if (WARN_ON_ONCE(!(file->f_mode & FMODE_BACKING))) b9455f57e320481 Christian Brauner 2025-11-03 194 return -EIO; b9455f57e320481 Christian Brauner 2025-11-03 195 b9455f57e320481 Christian Brauner 2025-11-03 196 if (!iov_iter_count(iter)) b9455f57e320481 Christian Brauner 2025-11-03 197 return 0; b9455f57e320481 Christian Brauner 2025-11-03 198 b9455f57e320481 Christian Brauner 2025-11-03 199 if (iocb->ki_flags & IOCB_DIRECT && b9455f57e320481 Christian Brauner 2025-11-03 200 !(file->f_mode & FMODE_CAN_ODIRECT)) b9455f57e320481 Christian Brauner 2025-11-03 201 return -EINVAL; b9455f57e320481 Christian Brauner 2025-11-03 202 b9455f57e320481 Christian Brauner 2025-11-03 203 scoped_with_creds(ctx->cred) b9455f57e320481 Christian Brauner 2025-11-03 204 do_backing_file_read_iter(file, iter, iocb, flags); a6293b3e285cd0d Amir Goldstein 2023-11-22 205 a6293b3e285cd0d Amir Goldstein 2023-11-22 206 if (ctx->accessed) 48b50624aec454c Miklos Szeredi 2024-10-21 207 ctx->accessed(iocb->ki_filp); a6293b3e285cd0d Amir Goldstein 2023-11-22 208 a6293b3e285cd0d Amir Goldstein 2023-11-22 @209 return ret; a6293b3e285cd0d Amir Goldstein 2023-11-22 210 } a6293b3e285cd0d Amir Goldstein 2023-11-22 211 EXPORT_SYMBOL_GPL(backing_file_read_iter); a6293b3e285cd0d Amir Goldstein 2023-11-22 212 :::::: The code at line 209 was first introduced by commit :::::: a6293b3e285cd0d7692141d7981a5f144f0e2f0b fs: factor out backing_file_{read,write}_iter() helpers :::::: TO: Amir Goldstein :::::: CC: Amir Goldstein -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki