BUG: Bad page state in process syz.3.1418  pfn:900b2
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x900b2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 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 11876, tgid 11875 (syz.3.1418), ts 296152110734, free_ts 295621761818
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 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:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 __tlb_remove_table_free mm/mmu_gather.c:228 [inline]
 tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
 rcu_do_batch kernel/rcu/tree.c:2617 [inline]
 rcu_core+0x78b/0x10a0 kernel/rcu/tree.c:2869
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1076
 smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:57c60
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888057c60000 pfn:0x57c60
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: ffff888057c60000 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 11876, tgid 11875 (syz.3.1418), ts 296152093087, free_ts 295641702400
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:57c61
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x57c61
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: ffffffffffffffff 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 11876, tgid 11875 (syz.3.1418), ts 296152074700, free_ts 295641720140
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:57c62
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x57c62
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: 0000000000000000 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 11876, tgid 11875 (syz.3.1418), ts 296152057395, free_ts 295641733945
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:57c63
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x57c63
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: 0000000000000000 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 11876, tgid 11875 (syz.3.1418), ts 296152036201, free_ts 295641747259
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:57c64
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x57c64
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: 0000000000000000 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 11876, tgid 11875 (syz.3.1418), ts 296149847803, free_ts 295641760337
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:38618
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88803861c000 pfn:0x38618
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: ffff88803861c000 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 11876, tgid 11875 (syz.3.1418), ts 296149828827, free_ts 295671510629
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:38619
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x38619
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: ffffffffffffffff 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 11876, tgid 11875 (syz.3.1418), ts 296149809338, free_ts 295671529081
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:3861a
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3861a
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: 0000000000000000 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 11876, tgid 11875 (syz.3.1418), ts 296149778126, free_ts 295671542414
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:3861b
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3861b
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: 0000000000000000 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 11876, tgid 11875 (syz.3.1418), ts 296149759486, free_ts 295671570984
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>
BUG: Bad page state in process syz.3.1418  pfn:3861c
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3861c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801af17000 0000000000000000
raw: 0000000000000000 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 11876, tgid 11875 (syz.3.1418), ts 296149740916, free_ts 295671583380
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5255
 alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5175
 alloc_pages_bulk_node_noprof include/linux/gfp.h:259 [inline]
 __page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:619
 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+0xcd0/0x19a0 net/core/skbuff.c:982
 netif_skb_check_for_xdp net/core/dev.c:5559 [inline]
 netif_receive_generic_xdp net/core/dev.c:5600 [inline]
 do_xdp_generic+0x770/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 10985 tgid 10985 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1397 [inline]
 __free_frozen_pages+0xc0d/0xd20 mm/page_alloc.c:2938
 vfree+0x1fd/0x330 mm/vmalloc.c:3472
 delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3392
 process_one_work kernel/workqueue.c:3314 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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: 11876 Comm: syz.3.1418 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 bad_page+0x17f/0x1c0 mm/page_alloc.c:632
 free_page_is_bad mm/page_alloc.c:1076 [inline]
 __free_pages_prepare mm/page_alloc.c:1388 [inline]
 __free_frozen_pages+0xcca/0xd20 mm/page_alloc.c:2938
 bpf_xdp_shrink_data net/core/filter.c:4220 [inline]
 bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4244
 ____bpf_xdp_adjust_tail net/core/filter.c:4266 [inline]
 bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4259
 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:722 [inline]
 bpf_prog_run_xdp include/net/xdp.h:696 [inline]
 bpf_prog_run_generic_xdp+0x5e3/0x14b0 net/core/dev.c:5490
 netif_receive_generic_xdp net/core/dev.c:5606 [inline]
 do_xdp_generic+0xac2/0x12d0 net/core/dev.c:5668
 tun_get_user+0x24a0/0x4350 drivers/net/tun.c:1905
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2032
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f67df55d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f67e046afb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f67e046b6c0 RCX: 00007f67df55d68e
RDX: 0000000000011dc0 RSI: 00002000000030c0 RDI: 00000000000000c8
RBP: 00007f67df632d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f67df816038 R14: 00007f67df815fa0 R15: 00007fff14f602d8
 </TASK>