page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1298 [inline] __free_pages_ok+0x10a5/0x1180 mm/page_alloc.c:1572 destroy_compound_page include/linux/mm.h:939 [inline] __put_compound_page mm/swap.c:111 [inline] release_pages+0x600/0x1b80 mm/swap.c:948 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:242 [inline] tlb_flush_mmu+0x780/0x910 mm/mmu_gather.c:249 tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:340 unmap_region+0x2ab/0x300 mm/mmap.c:2683 __do_munmap+0x18ae/0x2020 mm/mmap.c:2912 do_munmap mm/mmap.c:2923 [inline] munmap_vma_range mm/mmap.c:604 [inline] mmap_region+0x86f/0x1da0 mm/mmap.c:1756 do_mmap+0x967/0x11e0 mm/mmap.c:1587 vm_mmap_pgoff+0x19e/0x2b0 mm/util.c:519 ksys_mmap_pgoff+0x504/0x7b0 mm/mmap.c:1638 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae ------------[ cut here ]------------ kernel BUG at include/linux/page-flags.h:686! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 31819 Comm: syz-executor.3 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:PageDoubleMap include/linux/page-flags.h:686 [inline] RIP: 0010:__page_mapcount+0x2b3/0x2d0 mm/util.c:728 Code: e8 72 25 cf ff 4c 89 ff 48 c7 c6 40 fb 39 8a e8 03 4c 04 00 0f 0b e8 5c 25 cf ff 4c 89 ff 48 c7 c6 40 fc 39 8a e8 ed 4b 04 00 <0f> 0b e8 46 25 cf ff 4c 89 ff 48 c7 c6 80 fc 39 8a e8 d7 4b 04 00 RSP: 0018:ffffc9000238f460 EFLAGS: 00010246 RAX: 32d862b87f31f100 RBX: 00fff0000008001d RCX: 0000000000040000 RDX: ffffc9001671d000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 0000000000000000 R08: ffffffff81ce2584 R09: ffffed1017363f24 R10: ffffed1017363f24 R11: 0000000000000000 R12: 1ffffd400040e079 R13: 00000000ffffea00 R14: dffffc0000000000 R15: ffffea00020703c0 FS: 00007f3262016700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e524000 CR3: 0000000028359000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_mapcount include/linux/mm.h:873 [inline] smaps_account+0x79d/0x980 fs/proc/task_mmu.c:467 smaps_pte_entry fs/proc/task_mmu.c:533 [inline] smaps_pte_range+0x6ed/0xfc0 fs/proc/task_mmu.c:596 walk_pmd_range mm/pagewalk.c:89 [inline] walk_pud_range mm/pagewalk.c:160 [inline] walk_p4d_range mm/pagewalk.c:193 [inline] walk_pgd_range mm/pagewalk.c:229 [inline] __walk_page_range+0xd64/0x1ad0 mm/pagewalk.c:331 walk_page_vma+0x3c2/0x500 mm/pagewalk.c:482 smap_gather_stats fs/proc/task_mmu.c:769 [inline] show_smaps_rollup+0x49d/0xc20 fs/proc/task_mmu.c:872 seq_read_iter+0x43a/0xcf0 fs/seq_file.c:227 seq_read+0x445/0x5c0 fs/seq_file.c:159 do_loop_readv_writev fs/read_write.c:761 [inline] do_iter_read+0x464/0x660 fs/read_write.c:803 vfs_readv fs/read_write.c:921 [inline] do_preadv+0x1f7/0x340 fs/read_write.c:1013 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: ff ff 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3262016188 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000001 RSI: 0000000020000780 RDI: 0000000000000004 RBP: 00000000004bfcb9 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffca4fab89f R14: 00007f3262016300 R15: 0000000000022000 Modules linked in: ---[ end trace 55dced33dd81b9e0 ]--- RIP: 0010:PageDoubleMap include/linux/page-flags.h:686 [inline] RIP: 0010:__page_mapcount+0x2b3/0x2d0 mm/util.c:728 Code: e8 72 25 cf ff 4c 89 ff 48 c7 c6 40 fb 39 8a e8 03 4c 04 00 0f 0b e8 5c 25 cf ff 4c 89 ff 48 c7 c6 40 fc 39 8a e8 ed 4b 04 00 <0f> 0b e8 46 25 cf ff 4c 89 ff 48 c7 c6 80 fc 39 8a e8 d7 4b 04 00 RSP: 0018:ffffc9000238f460 EFLAGS: 00010246 RAX: 32d862b87f31f100 RBX: 00fff0000008001d RCX: 0000000000040000 RDX: ffffc9001671d000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 0000000000000000 R08: ffffffff81ce2584 R09: ffffed1017363f24 R10: ffffed1017363f24 R11: 0000000000000000 R12: 1ffffd400040e079 R13: 00000000ffffea00 R14: dffffc0000000000 R15: ffffea00020703c0 FS: 00007f3262016700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e524000 CR3: 0000000028359000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400