BUG: Bad page state in process syz.7.2062 pfn:6105c page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000166 pfn:0x6105c flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 dead000000000040 ffff888020ee8000 0000000000000000 raw: 0000000200000166 3fffffffffffffff 00000000ffffffff 0000000000000000 page dumped because: page_pool leak page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 15369, tgid 15367 (syz.7.2062), ts 476112364947, free_ts 475916175255 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x234/0x290 mm/page_alloc.c:1846 prep_new_page mm/page_alloc.c:1854 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210 __alloc_pages_noprof mm/page_alloc.c:5244 [inline] alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164 alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline] __page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616 page_pool_alloc_netmems net/core/page_pool.c:667 [inline] page_pool_alloc_frag_netmem+0x421/0x9b0 net/core/page_pool.c:1076 page_pool_alloc_netmem include/net/page_pool/helpers.h:131 [inline] page_pool_alloc include/net/page_pool/helpers.h:167 [inline] page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline] skb_pp_cow_data+0xb69/0x13e0 net/core/skbuff.c:972 netif_skb_check_for_xdp net/core/dev.c:5485 [inline] netif_receive_generic_xdp net/core/dev.c:5526 [inline] do_xdp_generic+0x699/0x1190 net/core/dev.c:5594 tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x5c9/0xb30 fs/read_write.c:686 ksys_write+0x145/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 15 tgid 15 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943 __tlb_remove_table_free mm/mmu_gather.c:227 [inline] tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:290 rcu_do_batch kernel/rcu/tree.c:2605 [inline] rcu_core+0xd70/0x1870 kernel/rcu/tree.c:2857 handle_softirqs+0x27d/0x850 kernel/softirq.c:622 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:1063 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Modules linked in: CPU: 0 UID: 0 PID: 15369 Comm: syz.7.2062 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 bad_page+0x180/0x1c0 mm/page_alloc.c:650 free_page_is_bad mm/page_alloc.c:1083 [inline] free_pages_prepare mm/page_alloc.c:1387 [inline] __free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943 bpf_xdp_shrink_data net/core/filter.c:4202 [inline] bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226 ____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline] bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241 bpf_prog_c65c7c5a0bd22f3a+0x27/0x68 __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run_xdp include/net/xdp.h:696 [inline] bpf_prog_run_generic_xdp+0x665/0x14c0 net/core/dev.c:5416 netif_receive_generic_xdp net/core/dev.c:5532 [inline] do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5594 tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x5c9/0xb30 fs/read_write.c:686 ksys_write+0x145/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb00f8e1ff Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48 RSP: 002b:00007fdb01ed6000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fdb011e5fa0 RCX: 00007fdb00f8e1ff RDX: 0000000000000f87 RSI: 0000200000001180 RDI: 00000000000000c8 RBP: 00007fdb01013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000f87 R11: 0000000000000293 R12: 0000000000000000 R13: 00007fdb011e6038 R14: 00007fdb011e5fa0 R15: 00007ffcedb04d38