BUG: Bad page state in process syz.6.2093 pfn:11887 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888011887f00 pfn:0x11887 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 dead000000000040 ffff888020ef3000 0000000000000000 raw: ffff888011887f00 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 10119, tgid 10119 (kworker/1:10), ts 213917221634, free_ts 213849796629 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850 prep_new_page mm/page_alloc.c:1858 [inline] get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3884 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5183 __alloc_pages_noprof mm/page_alloc.c:5217 [inline] alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5137 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline] __page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:612 page_pool_alloc_netmems net/core/page_pool.c:663 [inline] page_pool_alloc_frag_netmem+0x421/0x9b0 net/core/page_pool.c:1072 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_alloc_va include/net/page_pool/helpers.h:198 [inline] page_pool_dev_alloc_va include/net/page_pool/helpers.h:221 [inline] skb_pp_cow_data+0x285/0x13e0 net/core/skbuff.c:919 netif_skb_check_for_xdp net/core/dev.c:5429 [inline] netif_receive_generic_xdp net/core/dev.c:5470 [inline] do_xdp_generic+0x699/0x11a0 net/core/dev.c:5538 __netif_receive_skb_core+0x18f4/0x4380 net/core/dev.c:5889 __netif_receive_skb_one_core net/core/dev.c:6077 [inline] __netif_receive_skb+0x72/0x380 net/core/dev.c:6192 process_backlog+0x60e/0x14f0 net/core/dev.c:6544 __napi_poll+0xc7/0x360 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x5f7/0xdf0 net/core/dev.c:7784 handle_softirqs+0x283/0x870 kernel/softirq.c:622 do_softirq+0xec/0x180 kernel/softirq.c:523 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:450 page last free pid 5826 tgid 5826 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906 discard_slab mm/slub.c:3302 [inline] __put_partials+0x146/0x170 mm/slub.c:3849 put_cpu_partial+0x1f2/0x2e0 mm/slub.c:3924 __slab_free+0x2b9/0x390 mm/slub.c:5883 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4947 [inline] slab_alloc_node mm/slub.c:5246 [inline] kmem_cache_alloc_noprof+0x367/0x6e0 mm/slub.c:5253 ptlock_alloc+0x20/0x70 mm/memory.c:7284 ptlock_init include/linux/mm.h:3052 [inline] pagetable_pte_ctor include/linux/mm.h:3106 [inline] __pte_alloc_one_noprof include/asm-generic/pgalloc.h:78 [inline] pte_alloc_one+0x7a/0x310 arch/x86/mm/pgtable.c:18 __pte_alloc+0x25/0x1a0 mm/memory.c:452 copy_pte_range mm/memory.c:1235 [inline] copy_pmd_range+0x7805/0x7f00 mm/memory.c:1389 copy_pud_range mm/memory.c:1426 [inline] copy_p4d_range mm/memory.c:1450 [inline] copy_page_range+0xc14/0x1270 mm/memory.c:1538 dup_mmap+0xf4c/0x1b10 mm/mmap.c:1834 dup_mm kernel/fork.c:1489 [inline] copy_mm+0x13c/0x4b0 kernel/fork.c:1541 copy_process+0x1706/0x3c00 kernel/fork.c:2181 Modules linked in: CPU: 1 UID: 0 PID: 13962 Comm: syz.6.2093 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 bad_page+0x180/0x1c0 mm/page_alloc.c:649 free_page_is_bad mm/page_alloc.c:1082 [inline] free_pages_prepare mm/page_alloc.c:1386 [inline] __free_frozen_pages+0xce2/0xd30 mm/page_alloc.c:2906 bpf_xdp_shrink_data net/core/filter.c:4188 [inline] bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4212 ____bpf_xdp_adjust_tail net/core/filter.c:4234 [inline] bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4227 bpf_prog_c65c7c5a0bd22f3a+0x27/0x68 __bpf_prog_run include/linux/filter.h:721 [inline] bpf_prog_run_xdp include/net/xdp.h:696 [inline] bpf_prog_run_generic_xdp+0x606/0x13d0 net/core/dev.c:5360 netif_receive_generic_xdp net/core/dev.c:5476 [inline] do_xdp_generic+0x9f7/0x11a0 net/core/dev.c:5538 tun_get_user+0x2527/0x3e90 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/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4d3fb8d97f 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:00007f4d40986000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f4d3fde5fa0 RCX: 00007f4d3fb8d97f RDX: 00000000000010c6 RSI: 0000200000000440 RDI: 00000000000000c8 RBP: 00007f4d3fc11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000010c6 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f4d3fde6038 R14: 00007f4d3fde5fa0 R15: 00007fff6a51f808