tree: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git kspp/memcpy/next-20210803/v2-devel head: 4752984fc24104f399e70f99d48afa047d86a381 commit: 21b2d9d06a3a4d6bfafc9cfe88fcfa1a48e95162 [42/86] fortify: Detect struct member overflows in memcpy() at compile-time config: x86_64-randconfig-s022-20210814 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-348-gf0e6938b-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id... git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git git fetch --no-tags kees kspp/memcpy/next-20210803/v2-devel git checkout 21b2d9d06a3a4d6bfafc9cfe88fcfa1a48e95162 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/acpi/apei/erst.c:272:13: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *src @@ got void [noderef] __iomem * @@ drivers/acpi/apei/erst.c:272:13: sparse: expected void *src drivers/acpi/apei/erst.c:272:13: sparse: got void [noderef] __iomem * drivers/acpi/apei/erst.c:275:13: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *dst @@ got void [noderef] __iomem * @@ drivers/acpi/apei/erst.c:275:13: sparse: expected void *dst drivers/acpi/apei/erst.c:275:13: sparse: got void [noderef] __iomem * drivers/acpi/apei/erst.c:277:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got void *src @@ drivers/acpi/apei/erst.c:277:25: sparse: expected void volatile [noderef] __iomem *addr drivers/acpi/apei/erst.c:277:25: sparse: got void *src drivers/acpi/apei/erst.c:283:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got void *src @@ drivers/acpi/apei/erst.c:283:17: sparse: expected void volatile [noderef] __iomem *addr drivers/acpi/apei/erst.c:283:17: sparse: got void *src drivers/acpi/apei/erst.c:284:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got void *dst @@ drivers/acpi/apei/erst.c:284:17: sparse: expected void volatile [noderef] __iomem *addr drivers/acpi/apei/erst.c:284:17: sparse: got void *dst drivers/acpi/apei/erst.c:792:9: sparse: expected void const * drivers/acpi/apei/erst.c:792:9: sparse: got void [noderef] __iomem *static [toplevel] vaddr drivers/acpi/apei/erst.c:792:9: sparse: expected void const * drivers/acpi/apei/erst.c:792:9: sparse: got void [noderef] __iomem *static [toplevel] vaddr drivers/acpi/apei/erst.c:792:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void * @@ got void [noderef] __iomem *static [toplevel] vaddr @@ drivers/acpi/apei/erst.c:792:9: sparse: expected void * drivers/acpi/apei/erst.c:792:9: sparse: got void [noderef] __iomem *static [toplevel] vaddr drivers/acpi/apei/erst.c:793:20: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct cper_record_header *rcd_erange @@ got void [noderef] __iomem *static [toplevel] vaddr @@ drivers/acpi/apei/erst.c:793:20: sparse: expected struct cper_record_header *rcd_erange drivers/acpi/apei/erst.c:793:20: sparse: got void [noderef] __iomem *static [toplevel] vaddr drivers/acpi/apei/erst.c:830:17: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct cper_record_header *rcd_tmp @@ got void [noderef] __iomem * @@ drivers/acpi/apei/erst.c:830:17: sparse: expected struct cper_record_header *rcd_tmp drivers/acpi/apei/erst.c:830:17: sparse: got void [noderef] __iomem * vim +792 drivers/acpi/apei/erst.c a08f82d08053fb Huang Ying 2010-05-18 766 a08f82d08053fb Huang Ying 2010-05-18 767 int erst_write(const struct cper_record_header *record) a08f82d08053fb Huang Ying 2010-05-18 768 { a08f82d08053fb Huang Ying 2010-05-18 769 int rc; a08f82d08053fb Huang Ying 2010-05-18 770 unsigned long flags; a08f82d08053fb Huang Ying 2010-05-18 771 struct cper_record_header *rcd_erange; a08f82d08053fb Huang Ying 2010-05-18 772 a08f82d08053fb Huang Ying 2010-05-18 773 if (erst_disable) a08f82d08053fb Huang Ying 2010-05-18 774 return -ENODEV; a08f82d08053fb Huang Ying 2010-05-18 775 a08f82d08053fb Huang Ying 2010-05-18 776 if (memcmp(record->signature, CPER_SIG_RECORD, CPER_SIG_SIZE)) a08f82d08053fb Huang Ying 2010-05-18 777 return -EINVAL; a08f82d08053fb Huang Ying 2010-05-18 778 a08f82d08053fb Huang Ying 2010-05-18 779 if (erst_erange.attr & ERST_RANGE_NVRAM) { 3b38bb5f7f0635 Huang Ying 2010-12-02 780 if (!raw_spin_trylock_irqsave(&erst_lock, flags)) a08f82d08053fb Huang Ying 2010-05-18 781 return -EBUSY; a08f82d08053fb Huang Ying 2010-05-18 782 rc = __erst_write_to_nvram(record); 3b38bb5f7f0635 Huang Ying 2010-12-02 783 raw_spin_unlock_irqrestore(&erst_lock, flags); a08f82d08053fb Huang Ying 2010-05-18 784 return rc; a08f82d08053fb Huang Ying 2010-05-18 785 } a08f82d08053fb Huang Ying 2010-05-18 786 a08f82d08053fb Huang Ying 2010-05-18 787 if (record->record_length > erst_erange.size) a08f82d08053fb Huang Ying 2010-05-18 788 return -EINVAL; a08f82d08053fb Huang Ying 2010-05-18 789 3b38bb5f7f0635 Huang Ying 2010-12-02 790 if (!raw_spin_trylock_irqsave(&erst_lock, flags)) a08f82d08053fb Huang Ying 2010-05-18 791 return -EBUSY; a08f82d08053fb Huang Ying 2010-05-18 @792 memcpy(erst_erange.vaddr, record, record->record_length); a08f82d08053fb Huang Ying 2010-05-18 793 rcd_erange = erst_erange.vaddr; a08f82d08053fb Huang Ying 2010-05-18 794 /* signature for serialization system */ a08f82d08053fb Huang Ying 2010-05-18 795 memcpy(&rcd_erange->persistence_information, "ER", 2); a08f82d08053fb Huang Ying 2010-05-18 796 a08f82d08053fb Huang Ying 2010-05-18 797 rc = __erst_write_to_storage(0); 3b38bb5f7f0635 Huang Ying 2010-12-02 798 raw_spin_unlock_irqrestore(&erst_lock, flags); a08f82d08053fb Huang Ying 2010-05-18 799 a08f82d08053fb Huang Ying 2010-05-18 800 return rc; a08f82d08053fb Huang Ying 2010-05-18 801 } a08f82d08053fb Huang Ying 2010-05-18 802 EXPORT_SYMBOL_GPL(erst_write); a08f82d08053fb Huang Ying 2010-05-18 803 :::::: The code at line 792 was first introduced by commit :::::: a08f82d08053fb6e3aa3635c2c26456d96337c8b ACPI, APEI, Error Record Serialization Table (ERST) support :::::: TO: Huang Ying <ying.huang(a)intel.com&gt; :::::: CC: Len Brown <len.brown(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org