Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 62fabd56faafe033eb0be3ba24000b8db13d4c17 ("x86/PCI: Disable exclusion of E820 reserved addresses in some cases") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot <oliver.sang(a)intel.com&gt; [ 2.507461][ T1] BUG: KASAN: use-after-free in pci_acpi_root_prepare_resources (include/linux/list.h:150 include/linux/resource_ext.h:48 include/linux/resource_ext.h:59 arch/x86/pci/acpi.c:361) [ 2.507461][ T1] Read of size 8 at addr ffff8881433c6190 by task swapper/0/1 [ 2.507461][ T1] [ 2.507461][ T1] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.17.0-rc5-00001-g62fabd56faaf #1 [ 2.507461][ T1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 2.507461][ T1] Call Trace: [ 2.507461][ T1] <TASK> [ 2.507461][ T1] dump_stack_lvl (lib/dump_stack.c:107) [ 2.507461][ T1] print_address_description+0x21/0x180 [ 2.507461][ T1] ? pci_acpi_root_prepare_resources (include/linux/list.h:150 include/linux/resource_ext.h:48 include/linux/resource_ext.h:59 arch/x86/pci/acpi.c:361) [ 2.507461][ T1] kasan_report.cold (mm/kasan/report.c:443 mm/kasan/report.c:459) [ 2.507461][ T1] ? vscnprintf (lib/vsprintf.c:2974) [ 2.507461][ T1] ? pci_acpi_root_prepare_resources (include/linux/list.h:150 include/linux/resource_ext.h:48 include/linux/resource_ext.h:59 arch/x86/pci/acpi.c:361) [ 2.507461][ T1] pci_acpi_root_prepare_resources (include/linux/list.h:150 include/linux/resource_ext.h:48 include/linux/resource_ext.h:59 arch/x86/pci/acpi.c:361) [ 2.507461][ T1] ? pci_acpi_root_init_info.cold (arch/x86/pci/acpi.c:188 arch/x86/pci/acpi.c:219 arch/x86/pci/acpi.c:267) [ 2.507461][ T1] ? acpi_get_parent (drivers/acpi/acpica/nsxfobj.c:127) [ 2.507461][ T1] acpi_pci_root_create (drivers/acpi/pci_root.c:897) [ 2.507461][ T1] pci_acpi_scan_root (arch/x86/pci/acpi.c:431) [ 2.507461][ T1] ? pci_acpi_root_init_info (arch/x86/pci/acpi.c:390) [ 2.507461][ T1] ? decode_osc_bits+0x18a/0x18a [ 2.507461][ T1] ? acpi_pci_find_companion (drivers/pci/pci-acpi.c:108) [ 2.507461][ T1] acpi_pci_root_add.cold (drivers/acpi/pci_root.c:604) [ 2.507461][ T1] ? get_root_bridge_busnr_callback (drivers/acpi/pci_root.c:524) [ 2.507461][ T1] ? klist_next (lib/klist.c:403) [ 2.507461][ T1] ? acpi_bus_get_status_handle (drivers/acpi/bus.c:97) [ 2.507461][ T1] acpi_bus_attach (drivers/acpi/scan.c:2181 drivers/acpi/scan.c:2228) [ 2.507461][ T1] ? acpi_generic_device_attach (drivers/acpi/scan.c:2194) [ 2.507461][ T1] ? __device_attach (drivers/base/dd.c:942) [ 2.507461][ T1] ? device_bind_driver (drivers/base/dd.c:942) [ 2.507461][ T1] acpi_bus_attach (drivers/acpi/scan.c:2248 (discriminator 3)) [ 2.507461][ T1] ? acpi_generic_device_attach (drivers/acpi/scan.c:2194) [ 2.507461][ T1] ? __device_attach (drivers/base/dd.c:942) [ 2.507461][ T1] ? device_bind_driver (drivers/base/dd.c:942) [ 2.507461][ T1] acpi_bus_attach (drivers/acpi/scan.c:2248 (discriminator 3)) [ 2.507461][ T1] ? acpi_generic_device_attach (drivers/acpi/scan.c:2194) [ 2.507461][ T1] ? up (include/linux/list.h:292 kernel/locking/semaphore.c:187) [ 2.507461][ T1] ? acpi_os_signal_semaphore (drivers/acpi/osl.c:1305) [ 2.507461][ T1] ? acpi_ut_release_read_lock (drivers/acpi/acpica/utlock.c:111) [ 2.507461][ T1] ? acpi_bus_check_add_2 (drivers/acpi/scan.c:2116) [ 2.507461][ T1] ? acpi_walk_namespace (drivers/acpi/acpica/nsxfeval.c:616 drivers/acpi/acpica/nsxfeval.c:554) [ 2.507461][ T1] acpi_bus_scan (drivers/acpi/scan.c:2441) [ 2.507461][ T1] ? acpi_bus_check_add_1 (drivers/acpi/scan.c:2423) [ 2.507461][ T1] acpi_scan_init (drivers/acpi/scan.c:2603) [ 2.507461][ T1] ? acpi_match_madt (drivers/acpi/scan.c:2553) [ 2.507461][ T1] ? acpi_ut_release_mutex (drivers/acpi/acpica/utmutex.c:329) [ 2.507461][ T1] ? acpi_install_address_space_handler (drivers/acpi/acpica/evxfregn.c:88) [ 2.507461][ T1] acpi_init (drivers/acpi/bus.c:1335) [ 2.507461][ T1] ? acpi_bus_init (drivers/acpi/bus.c:1311) [ 2.507461][ T1] do_one_initcall (init/main.c:1300) [ 2.507461][ T1] ? perf_trace_initcall_level (init/main.c:1291) [ 2.507461][ T1] ? parameq (kernel/params.c:170) [ 2.507461][ T1] ? kasan_unpoison (mm/kasan/shadow.c:108 mm/kasan/shadow.c:142) [ 2.507461][ T1] ? __kasan_slab_alloc (mm/kasan/common.c:431 mm/kasan/common.c:469) [ 2.507461][ T1] kernel_init_freeable (init/main.c:1372 init/main.c:1389 init/main.c:1408 init/main.c:1613) [ 2.507461][ T1] ? console_on_rootfs (init/main.c:1584) [ 2.507461][ T1] ? _raw_spin_lock_irq (arch/x86/include/asm/atomic.h:202 include/linux/atomic/atomic-instrumented.h:543 include/asm-generic/qspinlock.h:82 include/linux/spinlock.h:185 include/linux/spinlock_api_smp.h:120 kernel/locking/spinlock.c:170) [ 2.507461][ T1] ? _raw_spin_lock (kernel/locking/spinlock.c:169) [ 2.507461][ T1] ? rest_init (init/main.c:1494) [ 2.507461][ T1] kernel_init (init/main.c:1504) [ 2.507461][ T1] ret_from_fork (arch/x86/entry/entry_64.S:301) [ 2.507461][ T1] </TASK> [ 2.507461][ T1] [ 2.507461][ T1] Allocated by task 1: [ 2.507461][ T1] kasan_save_stack (mm/kasan/common.c:39) [ 2.507461][ T1] __kasan_kmalloc (mm/kasan/common.c:45 mm/kasan/common.c:436 mm/kasan/common.c:515 mm/kasan/common.c:524) [ 2.507461][ T1] resource_list_create_entry (kernel/resource.c:1783) [ 2.507461][ T1] acpi_dev_new_resource_entry (drivers/acpi/resource.c:564) [ 2.507461][ T1] acpi_dev_process_resource (drivers/acpi/resource.c:601 drivers/acpi/resource.c:575) [ 2.507461][ T1] acpi_walk_resource_buffer (drivers/acpi/acpica/rsxface.c:548) [ 2.507461][ T1] acpi_walk_resources (include/acpi/platform/aclinuxex.h:62 drivers/acpi/acpica/rsxface.c:624 drivers/acpi/acpica/rsxface.c:594) [ 2.507461][ T1] __acpi_dev_get_resources (drivers/acpi/resource.c:635 drivers/acpi/resource.c:614) [ 2.507461][ T1] acpi_pci_probe_root_resources (drivers/acpi/pci_root.c:777) [ 2.507461][ T1] pci_acpi_root_prepare_resources (arch/x86/pci/acpi.c:358) [ 2.507461][ T1] acpi_pci_root_create (drivers/acpi/pci_root.c:897) [ 2.507461][ T1] pci_acpi_scan_root (arch/x86/pci/acpi.c:431) [ 2.507461][ T1] acpi_pci_root_add.cold (drivers/acpi/pci_root.c:604) [ 2.507461][ T1] acpi_bus_attach (drivers/acpi/scan.c:2181 drivers/acpi/scan.c:2228) [ 2.507461][ T1] acpi_bus_attach (drivers/acpi/scan.c:2248 (discriminator 3)) [ 2.507461][ T1] acpi_bus_scan (drivers/acpi/scan.c:2441) [ 2.507461][ T1] acpi_scan_init (drivers/acpi/scan.c:2603) [ 2.507461][ T1] acpi_init (drivers/acpi/bus.c:1335) [ 2.507461][ T1] do_one_initcall (init/main.c:1300) [ 2.507461][ T1] kernel_init_freeable (init/main.c:1372 init/main.c:1389 init/main.c:1408 init/main.c:1613) [ 2.507461][ T1] kernel_init (init/main.c:1504) [ 2.507461][ T1] ret_from_fork (arch/x86/entry/entry_64.S:301) [ 2.507461][ T1] [ 2.507461][ T1] Freed by task 1: [ 2.507461][ T1] kasan_save_stack (mm/kasan/common.c:39) [ 2.507461][ T1] kasan_set_track (mm/kasan/common.c:45) [ 2.507461][ T1] kasan_set_free_info (mm/kasan/generic.c:372) [ 2.507461][ T1] __kasan_slab_free (mm/kasan/common.c:368 mm/kasan/common.c:328 mm/kasan/common.c:374) [ 2.507461][ T1] kfree (mm/slub.c:1754 mm/slub.c:3509 mm/slub.c:4562) [ 2.507461][ T1] pci_acpi_root_prepare_resources (include/linux/resource_ext.h:53 include/linux/resource_ext.h:60 arch/x86/pci/acpi.c:361) [ 2.507461][ T1] acpi_pci_root_create (drivers/acpi/pci_root.c:897) [ 2.507461][ T1] pci_acpi_scan_root (arch/x86/pci/acpi.c:431) [ 2.507461][ T1] acpi_pci_root_add.cold (drivers/acpi/pci_root.c:604) [ 2.507461][ T1] acpi_bus_attach (drivers/acpi/scan.c:2181 drivers/acpi/scan.c:2228) [ 2.507461][ T1] acpi_bus_attach (drivers/acpi/scan.c:2248 (discriminator 3)) [ 2.507461][ T1] acpi_bus_scan (drivers/acpi/scan.c:2441) [ 2.507461][ T1] acpi_scan_init (drivers/acpi/scan.c:2603) [ 2.507461][ T1] acpi_init (drivers/acpi/bus.c:1335) To reproduce: # build kernel cd linux cp config-5.17.0-rc5-00001-g62fabd56faaf .config make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules make HOSTCC=gcc-9 CC=gcc-9 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install cd <mod-install-dir> find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email # if come across any failure that blocks the test, # please remove ~/.lkp and /lkp dir to run from a clean state. --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang