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"BUG:Bad_page_state_in_process" on: commit: 4e691413bed009d7bd6198eb8fcebd4559a9e017 ("[PATCH] mm/gup: fix handling of zero page in follow_page_pte()") url: https://github.com/intel-lab-lkp/linux/commits/peng8420-li-gmail-com/mm-gup-fix-handling-of-zero-page-in-follow_page_pte/20251112-152851 base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/all/20251112072424.125514-1-peng8420.li@gmail.com/ patch subject: [PATCH] mm/gup: fix handling of zero page in follow_page_pte() in testcase: trinity version: with following parameters: runtime: 300s group: group-04 nr_groups: 5 config: x86_64-randconfig-001-20251114 compiler: clang-20 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202511172111.32f89804-lkp@intel.com [ 271.087528][ T5904] BUG: Bad page state in process trinity-c1 pfn:05d00 [ 271.088206][ T5904] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5d00 [ 271.088949][ T5904] flags: 0x2000000000002000(reserved|zone=1) [ 271.089455][ T5904] raw: 2000000000002000 ffffea0000174008 ffffea0000174008 0000000000000000 [ 271.090260][ T5904] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 271.090973][ T5904] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set [ 271.091567][ T5904] Modules linked in: uvesafb input_leds pcspkr [ 271.092115][ T5904] CPU: 0 UID: 16384 PID: 5904 Comm: trinity-c1 Tainted: G T 6.18.0-rc5-00409-g4e691413bed0 #1 PREEMPT(none) [ 271.093592][ T5904] Tainted: [T]=RANDSTRUCT [ 271.094176][ T5904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 271.095412][ T5904] Call Trace: [ 271.095916][ T5904] [ 271.096360][ T5904] __dump_stack (lib/dump_stack.c:95) [ 271.096928][ T5904] dump_stack_lvl (lib/dump_stack.c:123) [ 271.097534][ T5904] dump_stack (lib/dump_stack.c:130) [ 271.098105][ T5904] bad_page (mm/page_alloc.c:?) [ 271.098668][ T5904] __free_frozen_pages (mm/page_alloc.c:?) [ 271.099331][ T5904] free_frozen_pages (mm/page_alloc.c:2987) [ 271.099969][ T5904] __folio_put (mm/swap.c:?) [ 271.100495][ T5904] page_cache_pipe_buf_release (fs/splice.c:112) [ 271.100975][ T5904] __se_sys_vmsplice (include/linux/pipe_fs_i.h:? fs/splice.c:261 fs/splice.c:1475 fs/splice.c:1555 fs/splice.c:1610 fs/splice.c:1580) [ 271.101425][ T5904] ? _raw_spin_unlock_irq (arch/x86/include/asm/preempt.h:104 include/linux/spinlock_api_smp.h:160 kernel/locking/spinlock.c:202) [ 271.101869][ T5904] ? do_setitimer (include/linux/spinlock.h:?) [ 271.102283][ T5904] ? trace_preempt_on (kernel/trace/trace_preemptirq.c:122) [ 271.102730][ T5904] __x64_sys_vmsplice (fs/splice.c:1580) [ 271.103151][ T5904] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 271.103653][ T5904] x64_sys_call (kbuild/obj/consumer/x86_64-randconfig-001-20251114/./arch/x86/include/generated/asm/syscalls_64.h:470) [ 271.104064][ T5904] do_syscall_64 (arch/x86/entry/syscall_64.c:?) [ 271.104467][ T5904] ? irqentry_exit (kernel/entry/common.c:224) [ 271.104869][ T5904] ? exc_page_fault (arch/x86/mm/fault.c:?) [ 271.105286][ T5904] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 271.105781][ T5904] RIP: 0033:0x463519 [ 271.106141][ T5904] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db 59 00 00 c3 66 2e 0f 1f 84 00 00 00 00 All code ======== 0: 00 f3 add %dh,%bl 2: c3 ret 3: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) a: 00 00 00 d: 0f 1f 40 00 nopl 0x0(%rax) 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 0f 83 db 59 00 00 jae 0x5a11 36: c3 ret 37: 66 data16 38: 2e cs 39: 0f .byte 0xf 3a: 1f (bad) 3b: 84 00 test %al,(%rax) 3d: 00 00 add %al,(%rax) ... Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 0f 83 db 59 00 00 jae 0x59e7 c: c3 ret d: 66 data16 e: 2e cs f: 0f .byte 0xf 10: 1f (bad) 11: 84 00 test %al,(%rax) 13: 00 00 add %al,(%rax) ... [ 271.107601][ T5904] RSP: 002b:00007ffffa2365e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000116 [ 271.108301][ T5904] RAX: ffffffffffffffda RBX: 0000000000000116 RCX: 0000000000463519 [ 271.108967][ T5904] RDX: 00000000000000d4 RSI: 000000002d4190c0 RDI: 0000000000000126 [ 271.109624][ T5904] RBP: 00007f2836c7b000 R08: 0000000000000000 R09: fffffffffffffffb [ 271.110286][ T5904] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000002 [ 271.110942][ T5904] R13: 00007f2836c7b058 R14: 000000002d15b850 R15: 00007f2836c7b000 [ 271.111621][ T5904] [ 271.111949][ T5904] Disabling lock debugging due to kernel taint The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20251117/202511172111.32f89804-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki