BUG: Bad page state in process syz.4.1242 pfn:26d47
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888026d47140 pfn:0x26d47
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 0000000000000000
raw: ffff888026d47140 3ffffffffffffffe 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 7192, tgid 7187 (syz.2.357), ts 125650348639, free_ts 125627679505
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0xc43/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:7c1de
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88807c1de640 pfn:0x7c1de
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 0000000000000000
raw: ffff88807c1de640 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 7192, tgid 7187 (syz.2.357), ts 125650036452, free_ts 125628294527
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:542fb
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880542fbc80 pfn:0x542fb
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 0000000000000000
raw: ffff8880542fbc80 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 7192, tgid 7187 (syz.2.357), ts 125650055949, free_ts 125628220247
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:27f80
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x27f80
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 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 7192, tgid 7187 (syz.2.357), ts 125650072827, free_ts 125628180810
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:25c5e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888025c5e640 pfn:0x25c5e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 0000000000000000
raw: ffff888025c5e640 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 7192, tgid 7187 (syz.2.357), ts 125650091402, free_ts 125628141383
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:29cf6
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29cf6
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 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 7192, tgid 7187 (syz.2.357), ts 125650110969, free_ts 125628102417
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:2819f
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802819f3c0 pfn:0x2819f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 0000000000000000
raw: ffff88802819f3c0 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 7192, tgid 7187 (syz.2.357), ts 125650130690, free_ts 125628063183
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:56415
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888056415dc0 pfn:0x56415
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 0000000000000000
raw: ffff888056415dc0 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 7192, tgid 7187 (syz.2.357), ts 125650149267, free_ts 125628024332
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:7aa91
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x7aa91
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 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 7192, tgid 7187 (syz.2.357), ts 125650165444, free_ts 125627985038
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:7aa92
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7aa92
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 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 7192, tgid 7187 (syz.2.357), ts 125650184770, free_ts 125627936858
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:762ee
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880762ee900 pfn:0x762ee
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 0000000000000000
raw: ffff8880762ee900 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 7192, tgid 7187 (syz.2.357), ts 125650203560, free_ts 125627897569
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8
BUG: Bad page state in process syz.4.1242 pfn:202a5
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880202a5f50 pfn:0x202a5
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888020ac3000 0000000000000000
raw: ffff8880202a5f50 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 7192, tgid 7187 (syz.2.357), ts 125650221834, free_ts 125627857185
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x228/0x280 mm/page_alloc.c:1884
prep_new_page mm/page_alloc.c:1892 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3945
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5240
__alloc_pages_noprof mm/page_alloc.c:5274 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5194
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+0xc21/0x1680 net/core/skbuff.c:972
netif_skb_check_for_xdp net/core/dev.c:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5825 tgid 5825 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973
__tlb_remove_table_free mm/mmu_gather.c:228 [inline]
tlb_remove_table_rcu+0x85/0x100 mm/mmu_gather.c:291
rcu_do_batch kernel/rcu/tree.c:2605 [inline]
rcu_core+0xc9e/0x1750 kernel/rcu/tree.c:2857
handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x5f/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: 1 UID: 0 PID: 10277 Comm: syz.4.1242 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+0x17f/0x1c0 mm/page_alloc.c:677
free_page_is_bad mm/page_alloc.c:1121 [inline]
free_pages_prepare mm/page_alloc.c:1425 [inline]
__free_frozen_pages+0xd28/0xd70 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4228
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:712 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x117b/0x13f0 net/core/dev.c:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
tun_get_user+0x247d/0x3dd0 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+0x61d/0xb90 fs/read_write.c:686
ksys_write+0x150/0x270 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fba20d5b78e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fba21c95fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fba21c966c0 RCX: 00007fba20d5b78e
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007fba20e08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fba21016038 R14: 00007fba21015fa0 R15: 00007ffee1d171d8