entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page_list+0x119/0x830 mm/page_alloc.c:3433 release_pages+0x185f/0x1bd0 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:50 [inline] tlb_flush_mmu_free mm/mmu_gather.c:241 [inline] tlb_flush_mmu mm/mmu_gather.c:248 [inline] tlb_finish_mmu+0x1b4/0x370 mm/mmu_gather.c:371 unmap_region+0x344/0x3b0 mm/mmap.c:2669 __do_munmap+0xa29/0xe10 mm/mmap.c:2899 __vm_munmap+0x13f/0x240 mm/mmap.c:2952 __do_sys_munmap mm/mmap.c:2978 [inline] __se_sys_munmap mm/mmap.c:2974 [inline] __x64_sys_munmap+0x67/0x70 mm/mmap.c:2974 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 ------------[ cut here ]------------ kernel BUG at mm/filemap.c:166! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 4916 Comm: syz.5.115 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:unaccount_page_cache_page+0x74d/0x860 mm/filemap.c:166 Code: e8 c8 17 db ff 4c 89 f7 48 c7 c6 20 02 33 8a e8 c9 fc 0d 00 0f 0b e8 b2 17 db ff 4c 89 f7 48 c7 c6 60 02 33 8a e8 b3 fc 0d 00 <0f> 0b 48 85 ed 75 59 e8 97 17 db ff eb 5d e8 90 17 db ff 4c 89 f7 RSP: 0018:ffffc900031bf6e8 EFLAGS: 00010046 RAX: 0c59b2d426f9f900 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff52000637ed0 RBP: ffffea00017423c8 R08: ffff8880b912795b R09: fffff52000637e8c R10: dffffc0000000000 R11: ffffed1017224f2c R12: ffffea00017423c0 R13: dffffc0000000000 R14: ffffea00017423c0 R15: 1ffffd40002e8479 FS: 000055556ebe8500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c300236 CR3: 000000005f9b4000 CR4: 00000000003526e0 DR0: 0000000000000000 DR1: 0000000000006800 DR2: 0000000000009951 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __delete_from_page_cache+0xbc/0x6c0 mm/filemap.c:231 delete_from_page_cache+0x121/0x190 mm/filemap.c:266 truncate_inode_page+0x8d/0xb0 mm/truncate.c:219 shmem_undo_range+0x4f4/0x19a0 mm/shmem.c:960 shmem_truncate_range mm/shmem.c:1063 [inline] shmem_evict_inode+0x1e2/0x9a0 mm/shmem.c:1145 evict+0x4b6/0x8b0 fs/inode.c:647 __dentry_kill+0x412/0x630 fs/dcache.c:586 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xd8/0x1a0 fs/dcache.c:893 __fput+0x5a5/0x8c0 fs/file_table.c:319 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fdabfc240d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcbea048a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffcbea04990 RCX: 00007fdabfc240d9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 0000000000019f29 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b2c120000 R11: 0000000000000246 R12: 00007ffcbea049d0 R13: 00007fdabfeabfac R14: 0000000000019f6b R15: 00007fdabfeabfa0 Modules linked in: ---[ end trace 31992e0be42c115c ]--- RIP: 0010:unaccount_page_cache_page+0x74d/0x860 mm/filemap.c:166 Code: e8 c8 17 db ff 4c 89 f7 48 c7 c6 20 02 33 8a e8 c9 fc 0d 00 0f 0b e8 b2 17 db ff 4c 89 f7 48 c7 c6 60 02 33 8a e8 b3 fc 0d 00 <0f> 0b 48 85 ed 75 59 e8 97 17 db ff eb 5d e8 90 17 db ff 4c 89 f7 RSP: 0018:ffffc900031bf6e8 EFLAGS: 00010046 RAX: 0c59b2d426f9f900 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff52000637ed0 RBP: ffffea00017423c8 R08: ffff8880b912795b R09: fffff52000637e8c R10: dffffc0000000000 R11: ffffed1017224f2c R12: ffffea00017423c0 R13: dffffc0000000000 R14: ffffea00017423c0 R15: 1ffffd40002e8479 FS: 000055556ebe8500(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c300236 CR3: 000000005f9b4000 CR4: 00000000003526e0 DR0: 0000000000000000 DR1: 0000000000006800 DR2: 0000000000009951 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400