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+0x122/0x7e0 mm/page_alloc.c:3433 release_pages+0x184b/0x1bb0 mm/swap.c:963 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline] tlb_flush_mmu_free mm/mmu_gather.c:240 [inline] tlb_flush_mmu mm/mmu_gather.c:247 [inline] tlb_finish_mmu+0x164/0x2e0 mm/mmu_gather.c:338 unmap_region+0x315/0x360 mm/mmap.c:2669 __do_munmap+0x9d3/0xdc0 mm/mmap.c:2899 __vm_munmap+0x137/0x230 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: 6523 Comm: syz.6.390 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:unaccount_page_cache_page+0x75c/0x870 mm/filemap.c:166 Code: e8 89 6f db ff 4c 89 f7 48 c7 c6 00 f5 12 8a e8 7a da 0d 00 0f 0b e8 73 6f db ff 4c 89 f7 48 c7 c6 40 f5 12 8a e8 64 da 0d 00 <0f> 0b 48 85 ed 75 59 e8 58 6f db ff eb 5d e8 51 6f db ff 4c 89 f7 RSP: 0018:ffffc900030df228 EFLAGS: 00010046 RAX: 893f62d2d62aa600 RBX: 0000000000000000 RCX: ffff8880576cd940 RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff RBP: 1ffffd40002bcca9 R08: dffffc0000000000 R09: ffffed1017224f2c R10: ffffed1017224f2c R11: 1ffff11017224f2b R12: ffffea00015e6540 R13: dffffc0000000000 R14: ffffea00015e6540 R15: ffffea00015e6548 FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c406a9a CR3: 00000000225de000 CR4: 00000000003526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __delete_from_page_cache+0xbf/0x6b0 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+0x4dc/0x1880 mm/shmem.c:960 shmem_truncate_range mm/shmem.c:1063 [inline] shmem_evict_inode+0x20d/0xa00 mm/shmem.c:1145 evict+0x485/0x870 fs/inode.c:647 __dentry_kill+0x431/0x650 fs/dcache.c:586 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xd8/0x1a0 fs/dcache.c:893 __fput+0x5ee/0x930 fs/file_table.c:319 task_work_run+0x125/0x1a0 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0x61e/0x20a0 kernel/exit.c:883 do_group_exit+0x12e/0x300 kernel/exit.c:997 get_signal+0x6ca/0x12c0 kernel/signal.c:2900 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 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: 0033:0x7f457faa9749 Code: Unable to access opcode bytes at RIP 0x7f457faa971f. RSP: 002b:00007f457dd100e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f457fcfffa8 RCX: 00007f457faa9749 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f457fcfffa8 RBP: 00007f457fcfffa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f457fd00038 R14: 00007ffc9bb77260 R15: 00007ffc9bb77348 Modules linked in: ---[ end trace 424a5af462cc399c ]--- RIP: 0010:unaccount_page_cache_page+0x75c/0x870 mm/filemap.c:166 Code: e8 89 6f db ff 4c 89 f7 48 c7 c6 00 f5 12 8a e8 7a da 0d 00 0f 0b e8 73 6f db ff 4c 89 f7 48 c7 c6 40 f5 12 8a e8 64 da 0d 00 <0f> 0b 48 85 ed 75 59 e8 58 6f db ff eb 5d e8 51 6f db ff 4c 89 f7 RSP: 0018:ffffc900030df228 EFLAGS: 00010046 RAX: 893f62d2d62aa600 RBX: 0000000000000000 RCX: ffff8880576cd940 RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff RBP: 1ffffd40002bcca9 R08: dffffc0000000000 R09: ffffed1017224f2c R10: ffffed1017224f2c R11: 1ffff11017224f2b R12: ffffea00015e6540 R13: dffffc0000000000 R14: ffffea00015e6540 R15: ffffea00015e6548 FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c406a9a CR3: 00000000225de000 CR4: 00000000003526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400