Greeting, FYI, we noticed kernel_BUG_at_include/linux/page-flags.h due to commit (built with gcc-11): commit: fa9b88e459d710cadf3b01e8a64eda00cc91cdd6 ("mm, slub: refactor free debug processing") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linux-next/master 469a89fd3bb73bb2eea628da2b3e0f695f80b7ce] in testcase: boot 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): [ 14.864365][ T181] page:6b5e897b refcount:1 mapcount:0 mapping:00000000 index:0xedc20780 pfn:0x2dc20 [ 14.865191][ T181] head:e9959bfb order:1 compound_mapcount:0 compound_pincount:0 [ 14.865805][ T181] flags: 0x10200(slab|head|zone=0) [ 14.866254][ T181] raw: 00010200 ead174b1 c0100a70 00000400 edc20780 00080002 ffffffff 00000001 [ 14.867009][ T181] raw: 00000000 00000000 [ 14.867363][ T181] head: 00010200 00000000 00000122 c01a0200 00000000 00010001 ffffffff 00000001 [ 14.868096][ T181] head: 00000000 00000000 [ 14.868449][ T181] page dumped because: VM_BUG_ON_PAGE(PageTail(page)) [ 14.869002][ T181] page_owner tracks the page as allocated [ 14.869497][ T181] page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 194, tgid 194 (lkp-setup-rootf), ts 14489802849, free_ts 14483904809 [ 14.871285][ T181] post_alloc_hook+0x1fa/0x280 [ 14.871703][ T181] get_page_from_freelist+0x226/0x310 [ 14.872149][ T181] __alloc_pages+0xdd/0x360 [ 14.872516][ T181] alloc_slab_page+0x12d/0x200 [ 14.872917][ T181] allocate_slab+0x6a/0x350 [ 14.873288][ T181] new_slab+0x48/0xc0 [ 14.873616][ T181] ___slab_alloc+0x8ff/0x11c0 [ 14.874084][ T181] __slab_alloc+0x47/0x80 [ 14.874559][ T181] kmem_cache_alloc+0x47a/0x610 [ 14.875048][ T181] mm_alloc+0x20/0x90 [ 14.875407][ T181] bprm_mm_init+0x24/0x180 [ 14.875773][ T181] alloc_bprm+0xc9/0x1a0 [ 14.876138][ T181] do_execveat_common+0x55/0x330 [ 14.876537][ T181] __ia32_sys_execve+0x64/0xa0 [ 14.876935][ T181] __do_fast_syscall_32+0x72/0xd0 [ 14.877320][ T181] do_fast_syscall_32+0x32/0x70 [ 14.877711][ T181] page last free stack trace: [ 14.878105][ T181] free_pcp_prepare+0x34f/0x940 [ 14.878501][ T181] free_unref_page_prepare+0x29/0x210 [ 14.878969][ T181] free_unref_page+0x3a/0x3b0 [ 14.879348][ T181] __free_pages+0x187/0x1f0 [ 14.879751][ T181] __free_slab+0x1fd/0x350 [ 14.880238][ T181] free_slab+0x22/0x70 [ 14.880620][ T181] __slab_free+0x2ab/0x340 [ 14.881070][ T181] kmem_cache_free+0x288/0x2d0 [ 14.881457][ T181] free_task+0x6d/0xd0 [ 14.881790][ T181] __put_task_struct+0x10d/0x2d0 [ 14.882202][ T181] put_task_struct+0x9d/0x100 [ 14.882668][ T181] delayed_put_task_struct+0x5e/0x70 [ 14.883126][ T181] rcu_do_batch+0x267/0xab0 [ 14.883519][ T181] rcu_core+0x21b/0x460 [ 14.883879][ T181] rcu_core_si+0x16/0x30 [ 14.884231][ T181] __do_softirq+0x178/0x53b [ 14.884634][ T181] ------------[ cut here ]------------ [ 14.885088][ T181] kernel BUG at include/linux/page-flags.h:319! [ 14.885586][ T181] invalid opcode: 0000 [#1] SMP [ 14.885973][ T181] CPU: 1 PID: 181 Comm: mountall Tainted: G S 6.1.0-rc2-00012-gfa9b88e459d7 #1 8a586a2648e09836656ae144dee8b8278b48383e [ 14.887074][ T181] EIP: folio_flags+0x31/0x70 [ 14.887532][ T181] Code: 48 83 05 28 19 bf c5 01 ba 18 47 2f c4 55 89 e5 83 15 2c 19 bf c5 00 e8 2d 2e f6 ff 83 05 38 19 bf c5 01 83 15 3c 19 bf c5 00 <0f> 0b 83 05 40 19 bf c5 01 b8 14 32 a5 c4 83 15 44 19 bf c5 00 e8 [ 14.889269][ T181] EAX: 00000000 EBX: edc21680 ECX: 00000000 EDX: ffffffff [ 14.889816][ T181] ESI: ead17500 EDI: c01a0480 EBP: edcdfd0c ESP: edcdfd0c [ 14.890364][ T181] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010246 [ 14.890976][ T181] CR0: 80050033 CR2: b7d1e03c CR3: 2dcfb000 CR4: 000406d0 [ 14.891528][ T181] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 14.892094][ T181] DR6: fffe0ff0 DR7: 00000400 [ 14.892483][ T181] Call Trace: [ 14.892754][ T181] kmem_cache_free+0xc3/0x2d0 [ 14.893139][ T181] __mmdrop+0xe4/0x210 [ 14.893478][ T181] ? lockdep_hardirqs_on_prepare+0x242/0x400 [ 14.893960][ T181] ? do_raw_spin_unlock+0x1c/0xa0 [ 14.894358][ T181] finish_task_switch+0x23e/0x370 [ 14.894760][ T181] ? finish_task_switch+0x42/0x370 [ 14.895168][ T181] __schedule+0x472/0x790 [ 14.895516][ T181] schedule+0x4a/0x130 [ 14.895830][ T181] pipe_read+0x417/0x780 [ 14.896159][ T181] ? prepare_to_wait_exclusive+0x160/0x160 [ 14.896603][ T181] vfs_read+0x35e/0x3f0 [ 14.896933][ T181] ksys_read+0x12e/0x1d0 [ 14.897286][ T181] __ia32_sys_read+0x1e/0x30 [ 14.897655][ T181] __do_fast_syscall_32+0x72/0xd0 [ 14.898059][ T181] ? kvm_clock_read+0x3f/0x70 [ 14.898452][ T181] ? kvm_sched_clock_read+0x16/0x40 [ 14.898877][ T181] ? sched_clock+0x16/0x30 [ 14.899222][ T181] ? sched_clock_cpu+0x12b/0x160 [ 14.899605][ T181] ? __lock_release+0x3bc/0x410 [ 14.899981][ T181] ? do_user_addr_fault+0x326/0xcb0 [ 14.900389][ T181] ? lockdep_hardirqs_on_prepare+0x242/0x400 [ 14.900849][ T181] ? irqentry_exit_to_user_mode+0x23/0x30 [ 14.901287][ T181] ? irqentry_exit+0x7f/0xc0 [ 14.901641][ T181] do_fast_syscall_32+0x32/0x70 [ 14.902018][ T181] do_SYSENTER_32+0x15/0x20 [ 14.902413][ T181] entry_SYSENTER_32+0xa2/0xfb [ 14.902836][ T181] EIP: 0xb7efd549 [ 14.903129][ T181] Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76 [ 14.904668][ T181] EAX: ffffffda EBX: 0000000d ECX: bfc4fecf EDX: 00000001 [ 14.905396][ T181] ESI: 00522a78 EDI: 00526b28 EBP: bfc4fee8 ESP: bfc4fe08 [ 14.905942][ T181] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000246 [ 14.906593][ T181] Modules linked in: [ 14.907010][ T181] ---[ end trace 0000000000000000 ]--- [ 14.907474][ T181] EIP: folio_flags+0x31/0x70 [ 14.907934][ T181] Code: 48 83 05 28 19 bf c5 01 ba 18 47 2f c4 55 89 e5 83 15 2c 19 bf c5 00 e8 2d 2e f6 ff 83 05 38 19 bf c5 01 83 15 3c 19 bf c5 00 <0f> 0b 83 05 40 19 bf c5 01 b8 14 32 a5 c4 83 15 44 19 bf c5 00 e8 [ 14.909475][ T181] EAX: 00000000 EBX: edc21680 ECX: 00000000 EDX: ffffffff [ 14.910036][ T181] ESI: ead17500 EDI: c01a0480 EBP: edcdfd0c ESP: edcdfd0c [ 14.910675][ T181] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 EFLAGS: 00010246 [ 14.911310][ T181] CR0: 80050033 CR2: b7d1e03c CR3: 2dcfb000 CR4: 000406d0 [ 14.911835][ T181] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 14.912399][ T181] DR6: fffe0ff0 DR7: 00000400 [ 14.912769][ T181] Kernel panic - not syncing: Fatal exception [ 14.913288][ T181] Kernel Offset: disabled If you fix the issue, kindly add following tag | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-lkp/202301081605.a2503af7-yujie.liu@intel.com To reproduce: # build kernel cd linux cp config-6.1.0-rc2-00012-gfa9b88e459d7 .config make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 olddefconfig prepare modules_prepare bzImage modules make HOSTCC=gcc-11 CC=gcc-11 ARCH=i386 INSTALL_MOD_PATH= modules_install cd 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 -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. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests