Hi Guangshuo, kernel test robot noticed the following build errors:
[auto build test ERROR on powerpc/next] [also build test ERROR on powerpc/fixes linus/master v7.0 next-20260421] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Guangshuo-Li/powerpc-pseries-papr-hvpipe-fix-NULL-dereference-in-handle-creation/20260420-224327 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next patch link: https://lore.kernel.org/r/20260420132429.128075-1-lgs201920130244%40gmail.com patch subject: [PATCH v2] powerpc/pseries/papr-hvpipe: fix NULL dereference in handle creation config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20260422/[email protected]/config) compiler: powerpc64-linux-gcc (GCC) 15.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260422/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): arch/powerpc/platforms/pseries/papr-hvpipe.c: In function 'papr_hvpipe_dev_create_handle': >> arch/powerpc/platforms/pseries/papr-hvpipe.c:513:24: error: invalid use of >> void expression 513 | owned_src_info = retain_and_null_ptr(src_info); | ^ vim +513 arch/powerpc/platforms/pseries/papr-hvpipe.c 479 480 static int papr_hvpipe_dev_create_handle(u32 srcID) 481 { 482 struct hvpipe_source_info *src_info __free(kfree) = NULL; 483 struct hvpipe_source_info *owned_src_info; 484 485 spin_lock(&hvpipe_src_list_lock); 486 /* 487 * Do not allow more than one process communicates with 488 * each source. 489 */ 490 src_info = hvpipe_find_source(srcID); 491 if (src_info) { 492 spin_unlock(&hvpipe_src_list_lock); 493 pr_err("pid(%d) is already using the source(%d)\n", 494 src_info->tsk->pid, srcID); 495 return -EALREADY; 496 } 497 spin_unlock(&hvpipe_src_list_lock); 498 499 src_info = kzalloc_obj(*src_info, GFP_KERNEL_ACCOUNT); 500 if (!src_info) 501 return -ENOMEM; 502 503 src_info->srcID = srcID; 504 src_info->tsk = current; 505 init_waitqueue_head(&src_info->recv_wqh); 506 507 FD_PREPARE(fdf, O_RDONLY | O_CLOEXEC, 508 anon_inode_getfile("[papr-hvpipe]", &papr_hvpipe_handle_ops, 509 (void *)src_info, O_RDWR)); 510 if (fdf.err) 511 return fdf.err; 512 > 513 owned_src_info = retain_and_null_ptr(src_info); 514 spin_lock(&hvpipe_src_list_lock); 515 /* 516 * If two processes are executing ioctl() for the same 517 * source ID concurrently, prevent the second process to 518 * acquire FD. 519 */ 520 if (hvpipe_find_source(srcID)) { 521 spin_unlock(&hvpipe_src_list_lock); 522 return -EALREADY; 523 } 524 list_add(&owned_src_info->list, &hvpipe_src_list); 525 spin_unlock(&hvpipe_src_list_lock); 526 return fd_publish(fdf); 527 } 528 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
