BUG: Bad page state in process syz.2.3 pfn:31505 page:ffffea0000c54140 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1c pfn:0x31505 flags: 0xfff0800000820c(referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff0800000820c ffffc9000484f940 ffffc9000484f940 0000000000000000 raw: 000000000000001c ffff88802f3019b0 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 5837, tgid 5836 (syz.2.3), ts 82859870545, free_ts 82714624476 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1582 prep_new_page mm/page_alloc.c:1589 [inline] get_page_from_freelist+0x2181/0x22a0 mm/page_alloc.c:3221 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4501 folio_alloc+0x1e/0x30 mm/mempolicy.c:2289 filemap_alloc_folio+0xdf/0x490 mm/filemap.c:1004 do_read_cache_folio+0x381/0x7f0 mm/filemap.c:3773 do_read_cache_page+0x32/0x260 mm/filemap.c:3875 read_mapping_page include/linux/pagemap.h:892 [inline] __get_metapage+0x31d/0xfa0 fs/jfs/jfs_metapage.c:620 diRead+0x6ec/0xbb0 fs/jfs/jfs_imap.c:367 jfs_iget+0x90/0x440 fs/jfs/inode.c:35 jfs_fill_super+0x6fc/0xab0 fs/jfs/super.c:580 mount_bdev+0x21c/0x2c0 fs/super.c:1643 legacy_get_tree+0xea/0x180 fs/fs_context.c:662 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24a/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1182 [inline] free_unref_page_prepare+0x7d7/0x8f0 mm/page_alloc.c:2366 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x319/0x400 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xd0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:306 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:770 slab_alloc_node mm/slub.c:3495 [inline] kmem_cache_alloc_node+0x1af/0x310 mm/slub.c:3540 __alloc_skb+0x103/0x2c0 net/core/skbuff.c:643 alloc_skb include/linux/skbuff.h:1316 [inline] mld_newpack+0x14f/0xbf0 net/ipv6/mcast.c:1771 add_grhead net/ipv6/mcast.c:1882 [inline] add_grec+0x1461/0x19c0 net/ipv6/mcast.c:2021 mld_send_cr net/ipv6/mcast.c:2144 [inline] mld_ifc_work+0x6f1/0xd60 net/ipv6/mcast.c:2686 process_one_work kernel/workqueue.c:2657 [inline] process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815 Modules linked in: CPU: 1 PID: 5849 Comm: syz.2.3 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 bad_page+0x14b/0x170 mm/page_alloc.c:539 free_page_is_bad mm/page_alloc.c:988 [inline] free_pages_prepare mm/page_alloc.c:1173 [inline] free_unref_page_prepare+0x884/0x8f0 mm/page_alloc.c:2366 free_unref_page_list+0xbe/0x860 mm/page_alloc.c:2505 release_pages+0x208a/0x2300 mm/swap.c:1022 __folio_batch_release+0x71/0xe0 mm/swap.c:1042 folio_batch_release include/linux/pagevec.h:83 [inline] truncate_inode_pages_range+0xb21/0xea0 mm/truncate.c:453 jfs_remount+0x34c/0x5c0 fs/jfs/super.c:451 reconfigure_super+0x229/0x8e0 fs/super.c:1151 do_remount fs/namespace.c:2927 [inline] path_mount+0xcfe/0xfa0 fs/namespace.c:3705 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f3c8599f34a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f3c86887e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f3c86887ee0 RCX: 00007f3c8599f34a RDX: 0000200000000f40 RSI: 0000200000000f00 RDI: 0000000000000000 RBP: 0000200000000f40 R08: 00007f3c86887ee0 R09: 0000000001a5a438 R10: 0000000001a5a438 R11: 0000000000000246 R12: 0000200000000f00 R13: 00007f3c86887ea0 R14: 0000000000000000 R15: 00002000000043c0