BUG: Bad page state in process syz.7.6260 pfn:9f7a9
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x9f7a9
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 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 29793, tgid 29791 (syz.7.6260), ts 3339230954032, free_ts 3339118914177
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 6015 tgid 6015 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
vfree+0x1fd/0xb50 mm/vmalloc.c:3466
delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3385
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:9f7aa
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x10 pfn:0x9f7aa
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 0000000000000000
raw: 0000000000000010 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 29793, tgid 29791 (syz.7.6260), ts 3339230935622, free_ts 3339118929127
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 6015 tgid 6015 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
vfree+0x1fd/0xb50 mm/vmalloc.c:3466
delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3385
process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
process_scheduled_works kernel/workqueue.c:3340 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:360a5
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x3 pfn:0x360a5
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 0000000000000000
raw: 0000000000000003 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 29793, tgid 29791 (syz.7.6260), ts 3339230916992, free_ts 3339188416175
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:6023f
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88806023fc80 pfn:0x6023f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 0000000000000000
raw: ffff88806023fc80 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 29793, tgid 29791 (syz.7.6260), ts 3339230898292, free_ts 3339188492125
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:aa0ed
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0xaa0ed
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 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 29793, tgid 29791 (syz.7.6260), ts 3339230879883, free_ts 3339188531555
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:9340e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9340e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 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 29793, tgid 29791 (syz.7.6260), ts 3339230861222, free_ts 3339188569785
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:302fa
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x302fa
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 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 29793, tgid 29791 (syz.7.6260), ts 3339230842832, free_ts 3339188610155
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:9f7b3
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9f7b3
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 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 29793, tgid 29791 (syz.7.6260), ts 3339230824563, free_ts 3339188648985
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:a5183
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0xa5183
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 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 29793, tgid 29791 (syz.7.6260), ts 3339230805902, free_ts 3339188687725
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:800a0
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x800a0
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 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 29793, tgid 29791 (syz.7.6260), ts 3339230787422, free_ts 3339188708195
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8
BUG: Bad page state in process syz.7.6260 pfn:7ad97
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ad97
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021293000 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 29793, tgid 29791 (syz.7.6260), ts 3339230768942, free_ts 3339188747215
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c7/0xca0 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x190 net/core/page_pool.c:654
page_pool_alloc_netmem include/net/page_pool/helpers.h:128 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x7c0/0x1010 net/core/skbuff.c:972
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1006
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x530/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
page last free pid 29791 tgid 29791 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943
__pagetable_free include/linux/mm.h:3200 [inline]
pagetable_free include/linux/mm.h:3224 [inline]
pagetable_dtor_free include/linux/mm.h:3328 [inline]
__tlb_remove_table include/asm-generic/tlb.h:220 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x2b2/0x390 mm/mmu_gather.c:290
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0x79c/0x15f0 kernel/rcu/tree.c:2857
handle_softirqs+0x219/0x950 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
Modules linked in:
CPU: 1 UID: 0 PID: 29793 Comm: syz.7.6260 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
bad_page+0xcf/0x220 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_page_is_bad mm/page_alloc.c:1088 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0x84d/0x1170 mm/page_alloc.c:2943
page_frag_free+0x27f/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3ba/0xb20 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4226 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x887/0xcb0 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x607/0x1590 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x8e6/0x1310 net/core/dev.c:5596
__netif_receive_skb_core.constprop.0+0xcec/0x35b0 net/core/dev.c:5949
__netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6137
__netif_receive_skb+0x1d/0x160 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x137/0x760 net/core/dev.c:6397
tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509
tun_get_user+0x28b2/0x3cc0 drivers/net/tun.c:1953
tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f703458e1ff
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:00007f703543c000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f70347e5fa0 RCX: 00007f703458e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007f7034613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f70347e6038 R14: 00007f70347e5fa0 R15: 00007ffc6419c8b8