BUG: Bad page state in process syz.4.3253 pfn:24daa
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888024daa780 pfn:0x24daa
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 0000000000000000
raw: ffff888024daa780 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 18364, tgid 18362 (syz.4.3253), ts 440815202578, free_ts 440694459356
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 15 tgid 15 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
__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:2605 [inline]
rcu_core+0xc8e/0x1720 kernel/rcu/tree.c:2857
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:6ac59
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x6ac59
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 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 18364, tgid 18362 (syz.4.3253), ts 440815067994, free_ts 440694487446
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 15 tgid 15 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
__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:2605 [inline]
rcu_core+0xc8e/0x1720 kernel/rcu/tree.c:2857
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:31204
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x31204
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 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 7562, tgid 7562 (kworker/u8:24), ts 223784752455, free_ts 223013462590
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_frag_netmem+0x421/0x9b0 net/core/page_pool.c:1076
page_pool_alloc_netmem include/net/page_pool/helpers.h:131 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_alloc_va include/net/page_pool/helpers.h:198 [inline]
page_pool_dev_alloc_va include/net/page_pool/helpers.h:221 [inline]
skb_pp_cow_data+0x285/0x13e0 net/core/skbuff.c:939
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
process_backlog+0x54f/0x1340 net/core/dev.c:6604
__napi_poll+0xae/0x320 net/core/dev.c:7668
napi_poll net/core/dev.c:7731 [inline]
net_rx_action+0x64a/0xe00 net/core/dev.c:7883
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
do_softirq+0x76/0xd0 kernel/softirq.c:523
__local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
page last free pid 8308 tgid 8308 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
__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:2605 [inline]
rcu_core+0xc8e/0x1720 kernel/rcu/tree.c:2857
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x60/0x150 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+0xa6/0xc0 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: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:29b4d
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000241 pfn:0x29b4d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 0000000000000000
raw: 0000000200000241 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 16354, tgid 16353 (syz.0.2806), ts 391621319115, free_ts 391614808991
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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_alloc_va include/net/page_pool/helpers.h:198 [inline]
page_pool_dev_alloc_va include/net/page_pool/helpers.h:221 [inline]
skb_pp_cow_data+0x25d/0x13e0 net/core/skbuff.c:939
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 16354 tgid 16353 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
vfree+0x25a/0x400 mm/vmalloc.c:3466
bpf_prog_calc_tag+0x315/0x370 kernel/bpf/core.c:331
resolve_pseudo_ldimm64+0xbc/0xc60 kernel/bpf/verifier.c:21047
bpf_check+0x1cf9/0x1c300 kernel/bpf/verifier.c:25217
bpf_prog_load+0x13ba/0x1a10 kernel/bpf/syscall.c:3088
__sys_bpf+0x507/0x860 kernel/bpf/syscall.c:6164
__do_sys_bpf kernel/bpf/syscall.c:6274 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6272 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6272
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:4f531
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x4f531
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 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 16354, tgid 16353 (syz.0.2806), ts 391621498111, free_ts 390824755672
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 15 tgid 15 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
__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:2605 [inline]
rcu_core+0xc8e/0x1720 kernel/rcu/tree.c:2857
handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:32fe0
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888032fe04b0 pfn:0x32fe0
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 0000000000000000
raw: ffff888032fe04b0 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 16354, tgid 16353 (syz.0.2806), ts 391621488604, free_ts 391404618635
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 8961 tgid 8961 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
vfree+0x25a/0x400 mm/vmalloc.c:3466
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:475d0
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880475d0000 pfn:0x475d0
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 0000000000000000
raw: ffff8880475d0000 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 16354, tgid 16353 (syz.0.2806), ts 391621478815, free_ts 391404875000
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 8961 tgid 8961 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
vfree+0x25a/0x400 mm/vmalloc.c:3466
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3385
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:475d1
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x475d1
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 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 16354, tgid 16353 (syz.0.2806), ts 391621469382, free_ts 391404890619
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 8961 tgid 8961 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
vfree+0x25a/0x400 mm/vmalloc.c:3466
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3385
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:475d2
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x475d2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 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 16354, tgid 16353 (syz.0.2806), ts 391621460114, free_ts 391404903616
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 8961 tgid 8961 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
vfree+0x25a/0x400 mm/vmalloc.c:3466
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3385
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:475d3
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x475d3
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 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 16354, tgid 16353 (syz.0.2806), ts 391621450700, free_ts 391404916018
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 8961 tgid 8961 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
vfree+0x25a/0x400 mm/vmalloc.c:3466
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3385
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8
BUG: Bad page state in process syz.4.3253 pfn:2a311
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x2a311
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880202a0000 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 16354, tgid 16353 (syz.0.2806), ts 391621441054, free_ts 391550544709
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x234/0x290 mm/page_alloc.c:1857
prep_new_page mm/page_alloc.c:1865 [inline]
get_page_from_freelist+0x24e0/0x2580 mm/page_alloc.c:3915
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
__alloc_pages_noprof mm/page_alloc.c:5244 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5164
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x14c/0x710 net/core/page_pool.c:616
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+0xb47/0x13e0 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5487 [inline]
netif_receive_generic_xdp net/core/dev.c:5528 [inline]
do_xdp_generic+0x699/0x1190 net/core/dev.c:5596
tun_get_user+0x2465/0x3dc0 drivers/net/tun.c:1872
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 16344 tgid 16344 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1406 [inline]
__free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
tlb_batch_list_free mm/mmu_gather.c:159 [inline]
tlb_finish_mmu+0x112/0x1d0 mm/mmu_gather.c:500
exit_mmap+0x439/0xb10 mm/mmap.c:1290
__mmput+0x118/0x430 kernel/fork.c:1173
exit_mm+0x169/0x230 kernel/exit.c:581
do_exit+0x627/0x22f0 kernel/exit.c:959
do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
__do_sys_exit_group kernel/exit.c:1123 [inline]
__se_sys_exit_group kernel/exit.c:1121 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1121
__pfx_syscall_get_nr+0x0/0x10 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 18364 Comm: syz.4.3253 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x180/0x1c0 mm/page_alloc.c:650
free_page_is_bad mm/page_alloc.c:1094 [inline]
free_pages_prepare mm/page_alloc.c:1398 [inline]
__free_frozen_pages+0xce6/0xd30 mm/page_alloc.c:2943
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 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+0x665/0x14c0 net/core/dev.c:5418
netif_receive_generic_xdp net/core/dev.c:5534 [inline]
do_xdp_generic+0x9f7/0x1190 net/core/dev.c:5596
__netif_receive_skb_core+0x10b6/0x2f90 net/core/dev.c:5949
__netif_receive_skb_one_core net/core/dev.c:6137 [inline]
__netif_receive_skb+0x72/0x380 net/core/dev.c:6252
netif_receive_skb_internal net/core/dev.c:6338 [inline]
netif_receive_skb+0x1bb/0x750 net/core/dev.c:6397
tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485
tun_get_user+0x2aa3/0x3dc0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x5c9/0xb30 fs/read_write.c:686
ksys_write+0x145/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa826d8e1ff
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:00007fa827b41000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa826fe5fa0 RCX: 00007fa826d8e1ff
RDX: 0000000000011dc0 RSI: 0000200000000680 RDI: 00000000000000c8
RBP: 00007fa826e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011dc0 R11: 0000000000000293 R12: 0000000000000000
R13: 00007fa826fe6038 R14: 00007fa826fe5fa0 R15: 00007ffcb62267c8