BUG: Bad page state in process syz.0.15  pfn:6f0dd
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x700000000 pfn:0x6f0dd
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 0000000000000000
raw: 0000000700000000 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 6549, tgid 6548 (syz.0.15), ts 128082283298, free_ts 124674542042
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 6431 tgid 6431 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 vfree+0x1a6/0x330 mm/vmalloc.c:3384
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:535
 __fput+0x449/0xa70 fs/file_table.c:465
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x8d6/0x2550 kernel/exit.c:953
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Not tainted 6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:33310
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x33310
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 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 6549, tgid 6548 (syz.0.15), ts 128082266028, free_ts 124674557223
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 6431 tgid 6431 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 vfree+0x1a6/0x330 mm/vmalloc.c:3384
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:535
 __fput+0x449/0xa70 fs/file_table.c:465
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x8d6/0x2550 kernel/exit.c:953
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:117af
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x117af
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 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 6549, tgid 6548 (syz.0.15), ts 128082248565, free_ts 124674572466
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 6431 tgid 6431 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 vfree+0x1a6/0x330 mm/vmalloc.c:3384
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:535
 __fput+0x449/0xa70 fs/file_table.c:465
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x8d6/0x2550 kernel/exit.c:953
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:2978b
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802978bc60 pfn:0x2978b
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 0000000000000000
raw: ffff88802978bc60 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 6549, tgid 6548 (syz.0.15), ts 128082231331, free_ts 124767626789
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 6431 tgid 6431 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 vfree+0x1a6/0x330 mm/vmalloc.c:3384
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:535
 __fput+0x449/0xa70 fs/file_table.c:465
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x8d6/0x2550 kernel/exit.c:953
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:66229
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7fa7a6a48 pfn:0x66229
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 0000000000000000
raw: 00000007fa7a6a48 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 6549, tgid 6548 (syz.0.15), ts 128082213727, free_ts 124777380077
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 23 tgid 23 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 pagetable_free include/linux/mm.h:3019 [inline]
 pagetable_dtor_free include/linux/mm.h:3117 [inline]
 __tlb_remove_table+0x2d2/0x3b0 include/asm-generic/tlb.h:215
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968
 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:6622a
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x700000000 pfn:0x6622a
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 0000000000000000
raw: 0000000700000000 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 6549, tgid 6548 (syz.0.15), ts 128082196322, free_ts 124777402915
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 23 tgid 23 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 pagetable_free include/linux/mm.h:3019 [inline]
 pagetable_dtor_free include/linux/mm.h:3117 [inline]
 __tlb_remove_table+0x2d2/0x3b0 include/asm-generic/tlb.h:215
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968
 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:79d6e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888079d6efc0 pfn:0x79d6e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 0000000000000000
raw: ffff888079d6efc0 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 6549, tgid 6548 (syz.0.15), ts 128082178830, free_ts 124777416504
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 23 tgid 23 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 pagetable_free include/linux/mm.h:3019 [inline]
 pagetable_dtor_free include/linux/mm.h:3117 [inline]
 __tlb_remove_table+0x2d2/0x3b0 include/asm-generic/tlb.h:215
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968
 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:5fcbb
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5fcbb
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 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 6549, tgid 6548 (syz.0.15), ts 128082161126, free_ts 124777475868
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 23 tgid 23 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 pagetable_free include/linux/mm.h:3019 [inline]
 pagetable_dtor_free include/linux/mm.h:3117 [inline]
 __tlb_remove_table+0x2d2/0x3b0 include/asm-generic/tlb.h:215
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968
 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:79d6a
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888079d6a310 pfn:0x79d6a
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 0000000000000000
raw: ffff888079d6a310 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 6549, tgid 6548 (syz.0.15), ts 128082143433, free_ts 124785625355
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 6431 tgid 6431 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 vfree+0x1a6/0x330 mm/vmalloc.c:3384
 vfree+0x29e/0x330 mm/vmalloc.c:3389
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:535
 __fput+0x449/0xa70 fs/file_table.c:465
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x8d6/0x2550 kernel/exit.c:953
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:31d1d
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888031d1de00 pfn:0x31d1d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 0000000000000000
raw: ffff888031d1de00 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 6549, tgid 6548 (syz.0.15), ts 128082125947, free_ts 124785642107
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 6431 tgid 6431 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 vfree+0x1a6/0x330 mm/vmalloc.c:3384
 vfree+0x29e/0x330 mm/vmalloc.c:3389
 kcov_put kernel/kcov.c:439 [inline]
 kcov_close+0x28/0x50 kernel/kcov.c:535
 __fput+0x449/0xa70 fs/file_table.c:465
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x8d6/0x2550 kernel/exit.c:953
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>
BUG: Bad page state in process syz.0.15  pfn:11001
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888011001dc0 pfn:0x11001
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021ad4000 0000000000000000
raw: ffff888011001dc0 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 6549, tgid 6548 (syz.0.15), ts 128082108787, free_ts 124786718946
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714
 prep_new_page mm/page_alloc.c:1722 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3684
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966
 __alloc_pages_noprof mm/page_alloc.c:5000 [inline]
 alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4920
 alloc_pages_bulk_node_noprof include/linux/gfp.h:254 [inline]
 __page_pool_alloc_pages_slow+0x127/0x6c0 net/core/page_pool.c:547
 page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
 page_pool_alloc include/net/page_pool/helpers.h:160 [inline]
 page_pool_dev_alloc include/net/page_pool/helpers.h:181 [inline]
 skb_pp_cow_data+0xaf4/0x12f0 net/core/skbuff.c:955
 netif_skb_check_for_xdp net/core/dev.c:5241 [inline]
 netif_receive_generic_xdp net/core/dev.c:5280 [inline]
 do_xdp_generic+0x51a/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
page last free pid 6431 tgid 6431 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1258 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2721
 pagetable_free include/linux/mm.h:3019 [inline]
 pagetable_dtor_free include/linux/mm.h:3117 [inline]
 __tlb_remove_table+0x2d2/0x3b0 include/asm-generic/tlb.h:215
 __tlb_remove_table_free mm/mmu_gather.c:227 [inline]
 tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:290
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Modules linked in:
CPU: 0 UID: 0 PID: 6549 Comm: syz.0.15 Tainted: G    B               6.15.0-rc7-syzkaller-ga11a72229881 #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 bad_page+0x15e/0x1a0 mm/page_alloc.c:506
 free_page_is_bad mm/page_alloc.c:949 [inline]
 free_pages_prepare mm/page_alloc.c:1250 [inline]
 __free_frozen_pages+0xc77/0xcd0 mm/page_alloc.c:2721
 bpf_xdp_shrink_data net/core/filter.c:4164 [inline]
 bpf_xdp_frags_shrink_tail+0x3a5/0x750 net/core/filter.c:4184
 ____bpf_xdp_adjust_tail net/core/filter.c:4209 [inline]
 bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4202
 bpf_prog_f476d5219b92964a+0x1e/0x24
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run_xdp include/net/xdp.h:653 [inline]
 bpf_prog_run_generic_xdp+0x64b/0x14c0 net/core/dev.c:5173
 netif_receive_generic_xdp net/core/dev.c:5286 [inline]
 do_xdp_generic+0x76e/0xd20 net/core/dev.c:5348
 __netif_receive_skb_core+0x1823/0x4180 net/core/dev.c:5698
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0x72/0x380 net/core/dev.c:6000
 netif_receive_skb_internal net/core/dev.c:6086 [inline]
 netif_receive_skb+0x1cb/0x790 net/core/dev.c:6145
 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
 tun_get_user+0x2879/0x3c20 drivers/net/tun.c:1938
 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1984
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff56317e98f
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:00007ff564035020 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff563345fa0 RCX: 00007ff56317e98f
RDX: 0000000000011dc0 RSI: 00000000200004c0 RDI: 00000000000000c8
RBP: 00007ff5631f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff563345fa0 R15: 00007ffca324b8d8
 </TASK>