tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.4 head: 517550f651234b0e27057d8108908f58f07fa357 commit: 5f936529eee86906de3b0dba0d40ddc29bb8bac1 [84/103] cxl: Fix kobject memleak config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 7.5.0 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 git checkout 5f936529eee86906de3b0dba0d40ddc29bb8bac1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=powerpc 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 >>): In file included from arch/powerpc/include/asm/bug.h:127:0, from arch/powerpc/include/asm/mmu-hash64.h:17, from arch/powerpc/include/asm/mmu.h:185, from arch/powerpc/include/asm/lppaca.h:36, from arch/powerpc/include/asm/paca.h:20, from arch/powerpc/include/asm/current.h:16, from include/linux/mutex.h:13, from include/linux/kernfs.h:13, from include/linux/sysfs.h:15, from include/linux/kobject.h:21, from include/linux/device.h:17, from drivers/misc/cxl/sysfs.c:11: include/linux/cpumask.h: In function 'cpumask_check': include/linux/cpumask.h:117:19: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] WARN_ON_ONCE(cpu >= nr_cpumask_bits); ^ include/asm-generic/bug.h:112:27: note: in definition of macro 'WARN_ON_ONCE' int __ret_warn_once = !!(condition); \ ^~~~~~~~~ drivers/misc/cxl/sysfs.c: In function 'prefault_mode_store': drivers/misc/cxl/sysfs.c:306:11: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] if (mode == -1) ^~ drivers/misc/cxl/sysfs.c: In function 'cxl_sysfs_adapter_add': drivers/misc/cxl/sysfs.c:411:16: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] for (i = 0; i < ARRAY_SIZE(adapter_attrs); i++) { ^ drivers/misc/cxl/sysfs.c: In function 'cxl_sysfs_adapter_remove': drivers/misc/cxl/sysfs.c:425:16: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] for (i = 0; i < ARRAY_SIZE(adapter_attrs); i++) ^ drivers/misc/cxl/sysfs.c: In function 'cxl_sysfs_afu_new_cr': err: ^~~ drivers/misc/cxl/sysfs.c: In function 'cxl_sysfs_afu_remove': drivers/misc/cxl/sysfs.c:572:16: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) ^ drivers/misc/cxl/sysfs.c: In function 'cxl_sysfs_afu_add': drivers/misc/cxl/sysfs.c:588:16: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) { ^ drivers/misc/cxl/sysfs.c: In function 'cxl_sysfs_afu_m_add': drivers/misc/cxl/sysfs.c:638:16: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] for (i = 0; i < ARRAY_SIZE(afu_master_attrs); i++) { ^ drivers/misc/cxl/sysfs.c: In function 'cxl_sysfs_afu_m_remove': drivers/misc/cxl/sysfs.c:655:16: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] for (i = 0; i < ARRAY_SIZE(afu_master_attrs); i++) ^ cc1: all warnings being treated as errors # https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-4.4 git checkout 5f936529eee86906de3b0dba0d40ddc29bb8bac1 vim +/err +558 drivers/misc/cxl/sysfs.c b087e6190ddcd9 Ian Munsie 2015-02-04 509 b087e6190ddcd9 Ian Munsie 2015-02-04 510 static struct afu_config_record *cxl_sysfs_afu_new_cr(struct cxl_afu *afu, int cr_idx) b087e6190ddcd9 Ian Munsie 2015-02-04 511 { b087e6190ddcd9 Ian Munsie 2015-02-04 512 struct afu_config_record *cr; b087e6190ddcd9 Ian Munsie 2015-02-04 513 int rc; b087e6190ddcd9 Ian Munsie 2015-02-04 514 b087e6190ddcd9 Ian Munsie 2015-02-04 515 cr = kzalloc(sizeof(struct afu_config_record), GFP_KERNEL); b087e6190ddcd9 Ian Munsie 2015-02-04 516 if (!cr) b087e6190ddcd9 Ian Munsie 2015-02-04 517 return ERR_PTR(-ENOMEM); b087e6190ddcd9 Ian Munsie 2015-02-04 518 b087e6190ddcd9 Ian Munsie 2015-02-04 519 cr->cr = cr_idx; b087e6190ddcd9 Ian Munsie 2015-02-04 520 cr->device = cxl_afu_cr_read16(afu, cr_idx, PCI_DEVICE_ID); b087e6190ddcd9 Ian Munsie 2015-02-04 521 cr->vendor = cxl_afu_cr_read16(afu, cr_idx, PCI_VENDOR_ID); b087e6190ddcd9 Ian Munsie 2015-02-04 522 cr->class = cxl_afu_cr_read32(afu, cr_idx, PCI_CLASS_REVISION) >> 8; b087e6190ddcd9 Ian Munsie 2015-02-04 523 b087e6190ddcd9 Ian Munsie 2015-02-04 524 /* b087e6190ddcd9 Ian Munsie 2015-02-04 525 * Export raw AFU PCIe like config record. For now this is read only by b087e6190ddcd9 Ian Munsie 2015-02-04 526 * root - we can expand that later to be readable by non-root and maybe b087e6190ddcd9 Ian Munsie 2015-02-04 527 * even writable provided we have a good use-case. Once we suport b087e6190ddcd9 Ian Munsie 2015-02-04 528 * exposing AFUs through a virtual PHB they will get that for free from b087e6190ddcd9 Ian Munsie 2015-02-04 529 * Linux' PCI infrastructure, but until then it's not clear that we b087e6190ddcd9 Ian Munsie 2015-02-04 530 * need it for anything since the main use case is just identifying b087e6190ddcd9 Ian Munsie 2015-02-04 531 * AFUs, which can be done via the vendor, device and class attributes. b087e6190ddcd9 Ian Munsie 2015-02-04 532 */ b087e6190ddcd9 Ian Munsie 2015-02-04 533 sysfs_bin_attr_init(&cr->config_attr); b087e6190ddcd9 Ian Munsie 2015-02-04 534 cr->config_attr.attr.name = "config"; b087e6190ddcd9 Ian Munsie 2015-02-04 535 cr->config_attr.attr.mode = S_IRUSR; b087e6190ddcd9 Ian Munsie 2015-02-04 536 cr->config_attr.size = afu->crs_len; b087e6190ddcd9 Ian Munsie 2015-02-04 537 cr->config_attr.read = afu_read_config; b087e6190ddcd9 Ian Munsie 2015-02-04 538 b087e6190ddcd9 Ian Munsie 2015-02-04 539 rc = kobject_init_and_add(&cr->kobj, &afu_config_record_type, b087e6190ddcd9 Ian Munsie 2015-02-04 540 &afu->dev.kobj, "cr%i", cr->cr); b087e6190ddcd9 Ian Munsie 2015-02-04 541 if (rc) 5f936529eee869 Wang Hai 2020-06-02 542 goto err1; b087e6190ddcd9 Ian Munsie 2015-02-04 543 b087e6190ddcd9 Ian Munsie 2015-02-04 544 rc = sysfs_create_bin_file(&cr->kobj, &cr->config_attr); b087e6190ddcd9 Ian Munsie 2015-02-04 545 if (rc) b087e6190ddcd9 Ian Munsie 2015-02-04 546 goto err1; b087e6190ddcd9 Ian Munsie 2015-02-04 547 b087e6190ddcd9 Ian Munsie 2015-02-04 548 rc = kobject_uevent(&cr->kobj, KOBJ_ADD); b087e6190ddcd9 Ian Munsie 2015-02-04 549 if (rc) b087e6190ddcd9 Ian Munsie 2015-02-04 550 goto err2; b087e6190ddcd9 Ian Munsie 2015-02-04 551 b087e6190ddcd9 Ian Munsie 2015-02-04 552 return cr; b087e6190ddcd9 Ian Munsie 2015-02-04 553 err2: b087e6190ddcd9 Ian Munsie 2015-02-04 554 sysfs_remove_bin_file(&cr->kobj, &cr->config_attr); b087e6190ddcd9 Ian Munsie 2015-02-04 555 err1: b087e6190ddcd9 Ian Munsie 2015-02-04 556 kobject_put(&cr->kobj); b087e6190ddcd9 Ian Munsie 2015-02-04 557 return ERR_PTR(rc); f204e0b8cedd7d Ian Munsie 2014-10-08 @558 err: b087e6190ddcd9 Ian Munsie 2015-02-04 559 kfree(cr); b087e6190ddcd9 Ian Munsie 2015-02-04 560 return ERR_PTR(rc); f204e0b8cedd7d Ian Munsie 2014-10-08 561 } f204e0b8cedd7d Ian Munsie 2014-10-08 562 :::::: The code at line 558 was first introduced by commit :::::: f204e0b8cedd7da1dfcfd05ed6b7692737e24029 cxl: Driver code for powernv PCIe based cards for userspace access :::::: TO: Ian Munsie <imunsie(a)au1.ibm.com&gt; :::::: CC: Michael Ellerman <mpe(a)ellerman.id.au&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org