BUG: Bad page state in process syz-executor pfn:69125 page:ffffea0001a44940 refcount:0 mapcount:0 mapping:ffff888053ef87c8 index:0x2 pfn:0x69125 aops:z_erofs_cache_aops ino:0 flags: 0xfff00000000001(locked|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000001 dead000000000100 dead000000000122 ffff888053ef87c8 raw: 0000000000000002 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x192840(GFP_NOWAIT|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 6887, tgid 6886 (syz.4.300), ts 103104456513, free_ts 102899993012 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 z_erofs_bind_cache fs/erofs/zdata.c:605 [inline] z_erofs_pcluster_begin fs/erofs/zdata.c:889 [inline] z_erofs_do_read_page+0x20c0/0x3680 fs/erofs/zdata.c:1024 z_erofs_pcluster_readmore+0x2cf/0x450 fs/erofs/zdata.c:1833 z_erofs_read_folio+0x208/0x540 fs/erofs/zdata.c:1853 filemap_read_folio+0x167/0x760 mm/filemap.c:2420 do_read_cache_folio+0x470/0x7e0 mm/filemap.c:3789 erofs_bread+0x16f/0x630 fs/erofs/data.c:48 erofs_find_target_block fs/erofs/namei.c:103 [inline] erofs_namei+0x28c/0xf00 fs/erofs/namei.c:177 erofs_lookup+0x135/0x310 fs/erofs/namei.c:206 lookup_one_qstr_excl+0x112/0x250 fs/namei.c:1617 filename_create+0x222/0x460 fs/namei.c:3891 do_symlinkat+0xbd/0x3f0 fs/namei.c:4500 __do_sys_symlinkat fs/namei.c:4523 [inline] __se_sys_symlinkat fs/namei.c:4520 [inline] __x64_sys_symlinkat+0x99/0xb0 fs/namei.c:4520 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 vfree+0x1a6/0x320 mm/vmalloc.c:2868 dvb_usb_adapter_dvb_exit+0x9c/0x1b0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:225 dvb_usb_adapter_exit+0x8b/0x230 drivers/media/usb/dvb-usb/dvb-usb-init.c:128 dvb_usb_exit drivers/media/usb/dvb-usb/dvb-usb-init.c:143 [inline] dvb_usb_device_exit+0x1b7/0x330 drivers/media/usb/dvb-usb/dvb-usb-init.c:338 usb_unbind_interface+0x1f2/0x870 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x4cb/0x7a0 drivers/base/dd.c:1295 bus_remove_device+0x342/0x400 drivers/base/bus.c:576 device_del+0x50b/0x900 drivers/base/core.c:3872 usb_disable_device+0x3e9/0x8a0 drivers/usb/core/message.c:1416 usb_disconnect+0x34c/0x8a0 drivers/usb/core/hub.c:2315 hub_port_connect drivers/usb/core/hub.c:5369 [inline] hub_port_connect_change drivers/usb/core/hub.c:5669 [inline] port_event drivers/usb/core/hub.c:5833 [inline] hub_event+0x1cef/0x49c0 drivers/usb/core/hub.c:5915 process_one_work kernel/workqueue.c:2634 [inline] process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792 kthread+0x2fa/0x390 kernel/kthread.c:388 Modules linked in: CPU: 1 PID: 6140 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 bad_page+0x14b/0x170 mm/page_alloc.c:512 free_page_is_bad mm/page_alloc.c:961 [inline] free_pages_prepare mm/page_alloc.c:1146 [inline] free_unref_page_prepare+0x887/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 detach_page_private include/linux/pagemap.h:539 [inline] erofs_try_to_free_all_cached_pages+0x295/0x600 fs/erofs/zdata.c:657 erofs_try_to_release_workgroup fs/erofs/utils.c:132 [inline] erofs_shrink_workstation+0x118/0x290 fs/erofs/utils.c:161 erofs_shrinker_unregister+0x5d/0x170 fs/erofs/utils.c:198 erofs_put_super+0x4e/0x150 fs/erofs/super.c:812 generic_shutdown_super+0x134/0x2b0 fs/super.c:693 kill_block_super+0x44/0x90 fs/super.c:1660 erofs_kill_sb+0x4c/0x140 fs/erofs/super.c:794 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1259 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f7516790a77 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc2f005638 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f7516813d7d RCX: 00007f7516790a77 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc2f0056f0 RBP: 00007ffc2f0056f0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc2f006780 R13: 00007f7516813d7d R14: 00000000000192fa R15: 00007ffc2f0067c0