tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 27787ba3fa4904422b3928b898d1bd3d74d98bea commit: 60593df667e087b009ee0fc20d92e9c4c096a9b5 gpio: dwapb: fix NULL pointer dereference at dwapb_gpio_suspend() date: 5 months ago config: powerpc64-randconfig-r026-20210430 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=60593df667e087b009ee0fc20d92e9c4c096a9b5 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 60593df667e087b009ee0fc20d92e9c4c096a9b5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/gpio/gpio-dwapb.c:678:12: warning: stack frame size of 2064 bytes in function 'dwapb_gpio_probe' [-Wframe-larger-than=] static int dwapb_gpio_probe(struct platform_device *pdev) ^ 1 warning generated. vim +/dwapb_gpio_probe +678 drivers/gpio/gpio-dwapb.c a72b8c4a63e2a3 Hoan Tran 2017-02-21 677 7779b34556978f Jamie Iles 2014-02-25 @678 static int dwapb_gpio_probe(struct platform_device *pdev) 7779b34556978f Jamie Iles 2014-02-25 679 { 3d2613c4289ff2 Weike Chen 2014-09-17 680 unsigned int i; 7779b34556978f Jamie Iles 2014-02-25 681 struct dwapb_gpio *gpio; 7779b34556978f Jamie Iles 2014-02-25 682 int err; 3d2613c4289ff2 Weike Chen 2014-09-17 683 struct device *dev = &pdev->dev; 3d2613c4289ff2 Weike Chen 2014-09-17 684 struct dwapb_platform_data *pdata = dev_get_platdata(dev); 3d2613c4289ff2 Weike Chen 2014-09-17 685 da9df93e9e0fd1 Axel Lin 2014-12-28 686 if (!pdata) { 4ba8cfa79f44a9 Jiang Qiu 2016-04-28 687 pdata = dwapb_gpio_get_pdata(dev); 3d2613c4289ff2 Weike Chen 2014-09-17 688 if (IS_ERR(pdata)) 3d2613c4289ff2 Weike Chen 2014-09-17 689 return PTR_ERR(pdata); 3d2613c4289ff2 Weike Chen 2014-09-17 690 } 7779b34556978f Jamie Iles 2014-02-25 691 da9df93e9e0fd1 Axel Lin 2014-12-28 692 if (!pdata->nports) da9df93e9e0fd1 Axel Lin 2014-12-28 693 return -ENODEV; 7779b34556978f Jamie Iles 2014-02-25 694 3d2613c4289ff2 Weike Chen 2014-09-17 695 gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); da9df93e9e0fd1 Axel Lin 2014-12-28 696 if (!gpio) da9df93e9e0fd1 Axel Lin 2014-12-28 697 return -ENOMEM; da9df93e9e0fd1 Axel Lin 2014-12-28 698 3d2613c4289ff2 Weike Chen 2014-09-17 699 gpio->dev = &pdev->dev; 3d2613c4289ff2 Weike Chen 2014-09-17 700 gpio->nr_ports = pdata->nports; 3d2613c4289ff2 Weike Chen 2014-09-17 701 4731d80f5ea9b8 Serge Semin 2020-07-30 702 err = dwapb_get_reset(gpio); 4731d80f5ea9b8 Serge Semin 2020-07-30 703 if (err) 4731d80f5ea9b8 Serge Semin 2020-07-30 704 return err; 07901a94f9f9b1 Alan Tull 2017-10-11 705 3d2613c4289ff2 Weike Chen 2014-09-17 706 gpio->ports = devm_kcalloc(&pdev->dev, gpio->nr_ports, 7779b34556978f Jamie Iles 2014-02-25 707 sizeof(*gpio->ports), GFP_KERNEL); da9df93e9e0fd1 Axel Lin 2014-12-28 708 if (!gpio->ports) da9df93e9e0fd1 Axel Lin 2014-12-28 709 return -ENOMEM; 7779b34556978f Jamie Iles 2014-02-25 710 2a7194e9759586 Enrico Weigelt, metux IT consult 2019-03-11 711 gpio->regs = devm_platform_ioremap_resource(pdev, 0); da9df93e9e0fd1 Axel Lin 2014-12-28 712 if (IS_ERR(gpio->regs)) da9df93e9e0fd1 Axel Lin 2014-12-28 713 return PTR_ERR(gpio->regs); 7779b34556978f Jamie Iles 2014-02-25 714 daa3f58d180c07 Serge Semin 2020-07-30 715 err = dwapb_get_clks(gpio); daa3f58d180c07 Serge Semin 2020-07-30 716 if (err) e6bf37736f6495 Phil Edworthy 2018-03-12 717 return err; e6bf37736f6495 Phil Edworthy 2018-03-12 718 9826bbe1fef0b5 Andy Shevchenko 2020-04-15 719 gpio->flags = (uintptr_t)device_get_match_data(dev); a72b8c4a63e2a3 Hoan Tran 2017-02-21 720 3d2613c4289ff2 Weike Chen 2014-09-17 721 for (i = 0; i < gpio->nr_ports; i++) { 3d2613c4289ff2 Weike Chen 2014-09-17 722 err = dwapb_gpio_add_port(gpio, &pdata->properties[i], i); 7779b34556978f Jamie Iles 2014-02-25 723 if (err) 7779b34556978f Jamie Iles 2014-02-25 724 return err; 7779b34556978f Jamie Iles 2014-02-25 725 } 7779b34556978f Jamie Iles 2014-02-25 726 60593df667e087 Luo Jiaxing 2020-11-27 727 platform_set_drvdata(pdev, gpio); 60593df667e087 Luo Jiaxing 2020-11-27 728 7779b34556978f Jamie Iles 2014-02-25 729 return 0; 7779b34556978f Jamie Iles 2014-02-25 730 } 7779b34556978f Jamie Iles 2014-02-25 731 :::::: The code at line 678 was first introduced by commit :::::: 7779b34556978f6771a78bd87557523623e0405b gpio: add a driver for the Synopsys DesignWare APB GPIO block :::::: TO: Jamie Iles :::::: CC: Linus Walleij --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org