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 __pagevec_release+0x6d/0xe0 mm/swap.c:983 pagevec_release include/linux/pagevec.h:81 [inline] shmem_undo_range+0x5cd/0x19a0 mm/shmem.c:964 shmem_truncate_range mm/shmem.c:1063 [inline] shmem_evict_inode+0x1e2/0x9a0 mm/shmem.c:1145 evict+0x4b6/0x8b0 fs/inode.c:647 do_unlinkat+0x3e7/0x710 fs/namei.c:4363 __do_sys_unlink fs/namei.c:4404 [inline] __se_sys_unlink fs/namei.c:4402 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4402 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: 6333 Comm: syz.4.524 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:unaccount_page_cache_page+0x74d/0x860 mm/filemap.c:166 Code: e8 58 1a db ff 4c 89 f7 48 c7 c6 40 01 33 8a e8 c9 fc 0d 00 0f 0b e8 42 1a db ff 4c 89 f7 48 c7 c6 80 01 33 8a e8 b3 fc 0d 00 <0f> 0b 48 85 ed 75 59 e8 27 1a db ff eb 5d e8 20 1a db ff 4c 89 f7 RSP: 0018:ffffc900031ef6e8 EFLAGS: 00010046 RAX: 782c7ed9f25d4f00 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff5200063ded0 RBP: ffffea00014e9288 R08: ffff8880b902795b R09: fffff5200063de8c R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffffea00014e9280 R13: dffffc0000000000 R14: ffffea00014e9280 R15: 1ffffd400029d251 FS: 0000555555ff7500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000100 CR3: 00000000663d0000 CR4: 00000000003526f0 DR0: 0000000000000008 DR1: 0000000000000007 DR2: 0000000000000004 DR3: 0000000000000008 DR6: 00000000ffff0ff0 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: 0033:0x7f8e7de52e59 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:00007ffdd1382c38 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007ffdd1382d20 RCX: 00007f8e7de52e59 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 000000000002af1f R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b31c20000 R11: 0000000000000246 R12: 00007ffdd1382d60 R13: 00007f8e7e0dafac R14: 000000000002af79 R15: 00007f8e7e0dafa0 Modules linked in: ---[ end trace 082cff2b3d6eeef0 ]--- RIP: 0010:unaccount_page_cache_page+0x74d/0x860 mm/filemap.c:166 Code: e8 58 1a db ff 4c 89 f7 48 c7 c6 40 01 33 8a e8 c9 fc 0d 00 0f 0b e8 42 1a db ff 4c 89 f7 48 c7 c6 80 01 33 8a e8 b3 fc 0d 00 <0f> 0b 48 85 ed 75 59 e8 27 1a db ff eb 5d e8 20 1a db ff 4c 89 f7 RSP: 0018:ffffc900031ef6e8 EFLAGS: 00010046 RAX: 782c7ed9f25d4f00 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000044 RSI: 0000000000000000 RDI: fffff5200063ded0 RBP: ffffea00014e9288 R08: ffff8880b902795b R09: fffff5200063de8c R10: dffffc0000000000 R11: ffffed1017204f2c R12: ffffea00014e9280 R13: dffffc0000000000 R14: ffffea00014e9280 R15: 1ffffd400029d251 FS: 0000555555ff7500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000100 CR3: 00000000663d0000 CR4: 00000000003526f0 DR0: 0000000000000008 DR1: 0000000000000007 DR2: 0000000000000004 DR3: 0000000000000008 DR6: 00000000ffff0ff0 DR7: 0000000000000400