BUG: Bad page state in process syz.0.3419  pfn:2aadf
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802aadf000 pfn:0x2aadf
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff88802aadf000 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 20863, tgid 20862 (syz.0.3419), ts 1495313646639, free_ts 1495303461185
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_frag_netmem+0x219/0x9c0 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_dev_alloc include/net/page_pool/helpers.h:188 [inline]
 skb_pp_cow_data+0x584/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:790e5
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804a4ed600 pfn:0x790e5
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff88804a4ed600 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313640094, free_ts 1495303469781
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:28df1
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x28df1
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff888000000000 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313633182, free_ts 1495303478013
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:79eb5
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000000 pfn:0x79eb5
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: 0000000200000000 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313626684, free_ts 1495303486352
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:77ace
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x77ace
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff888000000000 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313620290, free_ts 1495303495210
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:52e57
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000118 pfn:0x52e57
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: 0000000200000118 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313613867, free_ts 1495303500070
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:75892
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x75892
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff888000000000 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313607383, free_ts 1495303508487
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:3213e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x3213e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff888000000000 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313600332, free_ts 1495303516832
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:24fe2
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888024fe2000 pfn:0x24fe2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff888024fe2000 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313593827, free_ts 1495303522739
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 pagetable_free include/linux/mm.h:2997 [inline]
 pagetable_dtor_free include/linux/mm.h:3100 [inline]
 __tlb_remove_table include/asm-generic/tlb.h:220 [inline]
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x121/0x320 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:7979b
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807979b2d0 pfn:0x7979b
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff88807979b2d0 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313586990, free_ts 1495303527693
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 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:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 rcu_do_batch kernel/rcu/tree.c:2605 [inline]
 rcu_core+0x79c/0x1530 kernel/rcu/tree.c:2861
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3f7/0xae0 kernel/smpboot.c:160
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:5c77a
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000000 pfn:0x5c77a
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: 0000000200000000 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313580542, free_ts 1495304973314
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 19316 tgid 19316 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 vfree+0x1fd/0xb50 mm/vmalloc.c:3440
 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3359
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>
BUG: Bad page state in process syz.0.3419  pfn:5344e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x5344e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801e6dc000 0000000000000000
raw: ffff888000000000 0000000000000001 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 20863, tgid 20862 (syz.0.3419), ts 1495313573843, free_ts 1495304981199
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 __alloc_pages_noprof mm/page_alloc.c:5217 [inline]
 alloc_pages_bulk_noprof+0x71c/0x1410 mm/page_alloc.c:5137
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:612
 page_pool_alloc_netmems net/core/page_pool.c:663 [inline]
 page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:650
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [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+0x7c0/0xff0 net/core/skbuff.c:952
 skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:986
 netif_skb_check_for_xdp net/core/dev.c:5429 [inline]
 netif_receive_generic_xdp net/core/dev.c:5470 [inline]
 do_xdp_generic+0x530/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 19316 tgid 19316 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 vfree+0x1fd/0xb50 mm/vmalloc.c:3440
 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3359
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 20863 Comm: syz.0.3419 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 bad_page+0xcf/0x220 mm/page_alloc.c:649
 free_page_is_bad mm/page_alloc.c:1082 [inline]
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 free_pages_prepare mm/page_alloc.c:1386 [inline]
 __free_frozen_pages+0x845/0x1160 mm/page_alloc.c:2906
 page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
 __xdp_return+0x3ab/0xab0 net/core/xdp.c:448
 bpf_xdp_shrink_data net/core/filter.c:4190 [inline]
 bpf_xdp_frags_shrink_tail net/core/filter.c:4214 [inline]
 ____bpf_xdp_adjust_tail net/core/filter.c:4236 [inline]
 bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4229
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x61f/0x1570 net/core/dev.c:5360
 netif_receive_generic_xdp net/core/dev.c:5476 [inline]
 do_xdp_generic+0x8e6/0x1320 net/core/dev.c:5538
 tun_get_user+0x1d41/0x3cc0 drivers/net/tun.c:1872
 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x7d3/0x11d0 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe728b8da7f
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:00007fe729a18000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe728de5fa0 RCX: 00007fe728b8da7f
RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007fe728c11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000
R13: 00007fe728de6038 R14: 00007fe728de5fa0 R15: 00007ffc4b6dec08
 </TASK>