BUG: Bad page state in process syz.2.3 pfn:1bf29 page:ffffea00006fca40 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1d pfn:0x1bf29 flags: 0xfff1800000820c(referenced|uptodate|workingset|private|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff1800000820c ffffea0001de0748 ffffea0000958788 0000000000000000 raw: 000000000000001d ffff88802d631000 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 5841, tgid 5840 (syz.2.3), ts 89959076068, free_ts 89457293329 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 diWrite+0x3fc/0x1f40 fs/jfs/jfs_imap.c:639 txCommit+0x83b/0x52e0 fs/jfs/jfs_txnmgr.c:1256 jfs_create+0x8c2/0xac0 fs/jfs/namei.c:156 lookup_open fs/namei.c:3496 [inline] open_last_lookups fs/namei.c:3564 [inline] path_openat+0x1705/0x3270 fs/namei.c:3794 do_filp_open+0x1f2/0x430 fs/namei.c:3824 do_sys_openat2+0x134/0x1d0 fs/open.c:1421 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x139/0x160 fs/open.c:1447 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 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:767 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:1743 add_grhead net/ipv6/mcast.c:1854 [inline] add_grec+0x1409/0x1910 net/ipv6/mcast.c:1992 mld_send_initial_cr+0x22d/0x4c0 net/ipv6/mcast.c:2237 ipv6_mc_dad_complete+0x87/0x4b0 net/ipv6/mcast.c:2248 addrconf_dad_completed+0x77e/0xd90 net/ipv6/addrconf.c:4327 Modules linked in: CPU: 0 PID: 5879 Comm: syz.2.3 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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+0x381/0xea0 mm/truncate.c:396 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: 0033:0x7feebf79e0ca 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:00007feebd9d4e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007feebd9d4ee0 RCX: 00007feebf79e0ca RDX: 0000200000000f40 RSI: 0000200000000f00 RDI: 0000000000000000 RBP: 0000200000000f40 R08: 00007feebd9d4ee0 R09: 0000000001ada438 R10: 0000000001ada438 R11: 0000000000000246 R12: 0000200000000f00 R13: 00007feebd9d4ea0 R14: 0000000000000000 R15: 0000200000000f80