Greeting, FYI, we noticed the following commit (built with clang-14): commit: f859d2a494648d9e9903bf46d4c27f88b2c53ab0 ("[PATCH v4] mm: page_alloc: Add debug log in free_reserved_area for static memory") url: https://github.com/0day-ci/linux/commits/Faiyaz-Mohammed/mm-page_alloc-Add-debug-log-in-free_reserved_area-for-static-memory/20211018-145621 in testcase: trinity version: with following parameters: number: 99999 group: group-04 test-description: Trinity is a linux system call fuzz tester. test-url: http://codemonkey.org.uk/projects/trinity/ on test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +--------------------------------------------------------------------------+-----------+------------+ | | v5.15-rc6 | f859d2a494 | +--------------------------------------------------------------------------+-----------+------------+ | kernel_BUG_at_arch/x86/mm/physaddr.c | 0 | 35 | | invalid_opcode:#[##] | 0 | 35 | | EIP:__phys_addr | 0 | 35 | +--------------------------------------------------------------------------+-----------+------------+ If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 3.615599][ T5] Unpacking initramfs... [ 4.464112][ T5] ------------[ cut here ]------------ [ 4.465044][ T5] kernel BUG at arch/x86/mm/physaddr.c:81! [ 4.466084][ T5] invalid opcode: 0000 [#1] [ 4.466746][ T5] CPU: 0 PID: 5 Comm: kworker/u2:0 Not tainted 5.15.0-rc6-00001-gf859d2a49464 #5 21680ec59cac6f17b63f4ff3a76cd498fdf11f87 [ 4.468387][ T5] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 4.469812][ T5] Workqueue: events_unbound async_run_entry_fn [ 4.469995][ T5] EIP: __phys_addr+0x50/0x60 [ 4.469995][ T5] Code: 90 cb 8f c3 85 c0 74 16 89 f1 c1 e9 0c 39 c1 77 17 89 f8 e8 72 20 00 00 31 f0 09 d0 75 0c 89 f0 5e 5f 5d c3 0f 0b 0f 0b 0f 0b <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 89 e5 56 3d 00 [ 4.469995][ T5] EAX: 36dfe000 EBX: f6175000 ECX: 00000000 EDX: 00000000 [ 4.469995][ T5] ESI: 36dfe000 EDI: f6dfe000 EBP: c3cdfeac ESP: c3cdfea4 [ 4.469995][ T5] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010206 [ 4.469995][ T5] CR0: 80050033 CR2: 00000000 CR3: 031ce000 CR4: 000406f0 [ 4.469995][ T5] Call Trace: [ 4.469995][ T5] free_reserved_area+0x1c/0x1c0 [ 4.469995][ T5] ? set_memory_rw+0x1d/0x30 [ 4.469995][ T5] free_init_pages+0x55/0x70 [ 4.469995][ T5] free_initrd_mem+0x1e/0x21 [ 4.469995][ T5] do_populate_rootfs+0x92/0x9f [ 4.469995][ T5] async_run_entry_fn+0x1c/0xa0 [ 4.469995][ T5] process_one_work+0x208/0x400 [ 4.469995][ T5] worker_thread+0x22a/0x400 [ 4.469995][ T5] kthread+0x133/0x150 [ 4.469995][ T5] ? pool_mayday_timeout+0x180/0x180 [ 4.469995][ T5] ? kthread_blkcg+0x30/0x30 [ 4.469995][ T5] ret_from_fork+0x19/0x24 [ 4.469995][ T5] Modules linked in: [ 4.487712][ T5] ---[ end trace e05e1d4a3febc36d ]--- [ 4.488527][ T5] EIP: __phys_addr+0x50/0x60 [ 4.489244][ T5] Code: 90 cb 8f c3 85 c0 74 16 89 f1 c1 e9 0c 39 c1 77 17 89 f8 e8 72 20 00 00 31 f0 09 d0 75 0c 89 f0 5e 5f 5d c3 0f 0b 0f 0b 0f 0b <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 89 e5 56 3d 00 [ 4.492036][ T5] EAX: 36dfe000 EBX: f6175000 ECX: 00000000 EDX: 00000000 [ 4.493068][ T5] ESI: 36dfe000 EDI: f6dfe000 EBP: c3cdfeac ESP: c3cdfea4 [ 4.494202][ T5] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010206 [ 4.495349][ T5] CR0: 80050033 CR2: 00000000 CR3: 031ce000 CR4: 000406f0 [ 4.496328][ T5] Kernel panic - not syncing: Fatal exception To reproduce: # build kernel cd linux cp config-5.15.0-rc6-00001-gf859d2a49464 .config make HOSTCC=clang-14 CC=clang-14 ARCH=i386 olddefconfig prepare modules_prepare bzImage git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k 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