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 exit_mmap+0x3d0/0x640 mm/mmap.c:3218 __mmput+0x115/0x390 kernel/fork.c:1133 exit_mm+0x632/0x7b0 kernel/exit.c:557 do_exit+0x5b8/0x2110 kernel/exit.c:877 do_group_exit+0x12c/0x2f0 kernel/exit.c:1004 __do_sys_exit_group kernel/exit.c:1015 [inline] __se_sys_exit_group kernel/exit.c:1013 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1013 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: 0 PID: 5886 Comm: syz.4.488 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 28 0a db ff 4c 89 f7 48 c7 c6 60 02 33 8a e8 59 fe 0d 00 0f 0b e8 12 0a db ff 4c 89 f7 48 c7 c6 a0 02 33 8a e8 43 fe 0d 00 <0f> 0b 48 85 ed 75 59 e8 f7 09 db ff eb 5d e8 f0 09 db ff 4c 89 f7 RSP: 0018:ffffc9000320f6e8 EFLAGS: 00010046 RAX: 473d879def7fab00 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff52000641ed0 RBP: ffffea0001692f08 R08: ffffffff8c313963 R09: fffff52000641e8c R10: dffffc0000000000 R11: fffffbfff186272d R12: ffffea0001692f00 R13: dffffc0000000000 R14: ffffea0001692f00 R15: 1ffffd40002d25e1 FS: 000055556997f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c33b0a0 CR3: 000000001eadd000 CR4: 00000000003526f0 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:184 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:217 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:310 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f6244a17159 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:00007ffc281b7a38 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffc281b7b20 RCX: 00007f6244a17159 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 000000000001c4cc R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b31820000 R11: 0000000000000246 R12: 00007ffc281b7b60 R13: 00007f6244c9efac R14: 000000000001c51b R15: 00007f6244c9efa0 Modules linked in: ---[ end trace bdf62e930d7d8627 ]--- RIP: 0010:unaccount_page_cache_page+0x74d/0x860 mm/filemap.c:166 Code: e8 28 0a db ff 4c 89 f7 48 c7 c6 60 02 33 8a e8 59 fe 0d 00 0f 0b e8 12 0a db ff 4c 89 f7 48 c7 c6 a0 02 33 8a e8 43 fe 0d 00 <0f> 0b 48 85 ed 75 59 e8 f7 09 db ff eb 5d e8 f0 09 db ff 4c 89 f7 RSP: 0018:ffffc9000320f6e8 EFLAGS: 00010046 RAX: 473d879def7fab00 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff52000641ed0 RBP: ffffea0001692f08 R08: ffffffff8c313963 R09: fffff52000641e8c R10: dffffc0000000000 R11: fffffbfff186272d R12: ffffea0001692f00 R13: dffffc0000000000 R14: ffffea0001692f00 R15: 1ffffd40002d25e1 FS: 000055556997f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c33b0a0 CR3: 000000001eadd000 CR4: 00000000003526f0