BUG: Bad page state in process syz-executor pfn:2b586 page:ffffea0000ad6180 refcount:0 mapcount:0 mapping:0000000000000000 index:0x4 pfn:0x2b586 flags: 0xfff18000002046(referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff18000002046 ffffea0000ab0e08 ffffc90003cb7960 0000000000000000 raw: 0000000000000004 ffff88802f42aba0 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 0x140c40(GFP_NOFS|__GFP_COMP|__GFP_HARDWALL), pid 8380, tgid 8379 (syz.0.912), ts 473331683777, free_ts 473309792532 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614 folio_alloc+0x1c/0x60 mm/mempolicy.c:2292 filemap_alloc_folio+0xdb/0x460 mm/filemap.c:999 do_read_cache_folio+0x1bb/0x760 mm/filemap.c:3591 do_read_cache_page+0x32/0x220 mm/filemap.c:3669 read_mapping_page include/linux/pagemap.h:791 [inline] __get_metapage+0x316/0xfa0 fs/jfs/jfs_metapage.c:620 dbAllocCtl+0xd4/0x9b0 fs/jfs/jfs_dmap.c:1813 dbAllocAG+0x1e7/0xfe0 fs/jfs/jfs_dmap.c:1353 dbDiscardAG+0x2ca/0x8e0 fs/jfs/jfs_dmap.c:1608 jfs_ioc_trim+0x42b/0x660 fs/jfs/jfs_discard.c:105 jfs_ioctl+0x2b6/0x3d0 fs/jfs/ioctl.c:131 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3525 release_pages+0x1f92/0x2200 mm/swap.c:1035 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0xff/0x210 mm/mmu_gather.c:261 tlb_finish_mmu+0xbd/0x1c0 mm/mmu_gather.c:361 unmap_region+0x272/0x2c0 mm/mmap.c:2343 do_mas_align_munmap+0xc57/0x1220 mm/mmap.c:2592 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650 __vm_munmap+0x18d/0x290 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2958 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Modules linked in: CPU: 0 PID: 4273 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+0x168/0x22e lib/dump_stack.c:106 bad_page+0x14b/0x170 mm/page_alloc.c:699 free_page_is_bad mm/page_alloc.c:1291 [inline] free_pages_prepare mm/page_alloc.c:1452 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x42a/0x9a0 mm/page_alloc.c:3384 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3525 release_pages+0x1f92/0x2200 mm/swap.c:1035 __pagevec_release+0x6d/0xe0 mm/swap.c:1055 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] truncate_inode_pages_range+0x2f6/0xff0 mm/truncate.c:372 dbUnmount+0x105/0x170 fs/jfs/jfs_dmap.c:264 jfs_umount+0x1fa/0x360 fs/jfs/jfs_umount.c:89 jfs_put_super+0x88/0x190 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x340 fs/super.c:501 kill_block_super+0x7c/0xe0 fs/super.c:1470 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191 task_work_run+0x1ca/0x250 kernel/task_work.c:203 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+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f6cbbb902f7 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:00007ffc28791348 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007f6cbbc11d7d RCX: 00007f6cbbb902f7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc28791400 RBP: 00007ffc28791400 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc28792490 R13: 00007f6cbbc11d7d R14: 00000000000739a7 R15: 00007ffc287924d0