BUG: Bad page state in process syz.0.3463 pfn:33797
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x33797
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 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 17163, tgid 17159 (syz.0.3463), ts 457095117456, free_ts 456647649129
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 15 tgid 15 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
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 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: 17163 Comm: syz.0.3463 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:34e91
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888034e91280 pfn:0x34e91
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 0000000000000000
raw: ffff888034e91280 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 17163, tgid 17159 (syz.0.3463), ts 457095097172, free_ts 456647661792
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 15 tgid 15 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
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 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: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:6d28a
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88806d28adc0 pfn:0x6d28a
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 0000000000000000
raw: ffff88806d28adc0 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 17163, tgid 17159 (syz.0.3463), ts 457095076998, free_ts 456647684939
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 15 tgid 15 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
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 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: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:786f9
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x786f9
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 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 17163, tgid 17159 (syz.0.3463), ts 457095056868, free_ts 456647707873
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 15 tgid 15 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
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 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: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:41467
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x41467
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 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 17163, tgid 17159 (syz.0.3463), ts 457095036531, free_ts 456647730358
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 15 tgid 15 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
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 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: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:9767a
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9767a
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 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 17163, tgid 17159 (syz.0.3463), ts 457095016134, free_ts 456647752858
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 15 tgid 15 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
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 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: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:89bf5
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x89bf5
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 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 17163, tgid 17159 (syz.0.3463), ts 457094959848, free_ts 456647775114
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 15 tgid 15 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
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 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: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:7c8ea
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0x7c8ea
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 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 17163, tgid 17159 (syz.0.3463), ts 457094939152, free_ts 456647797582
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 15 tgid 15 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
run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063
smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 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: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:98ad6
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98ad6
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 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 17163, tgid 17159 (syz.0.3463), ts 457094917843, free_ts 456937181274
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 17153 tgid 17153 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_batch_list_free mm/mmu_gather.c:160 [inline]
tlb_finish_mmu+0x144/0x230 mm/mmu_gather.c:533
exit_mmap+0x451/0xb30 mm/mmap.c:1290
__mmput+0x118/0x430 kernel/fork.c:1173
exit_mm+0x168/0x220 kernel/exit.c:581
do_exit+0x62e/0x2310 kernel/exit.c:959
do_group_exit+0x21b/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+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:5536c
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88805536c640 pfn:0x5536c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 0000000000000000
raw: ffff88805536c640 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 17163, tgid 17159 (syz.0.3463), ts 457094896630, free_ts 457072855929
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 17156 tgid 17156 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
__slab_free+0x2ce/0x320 mm/slub.c:6008
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4953 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x370/0x6e0 mm/slub.c:5270
proc_reg_open+0x1f4/0x540 fs/proc/inode.c:502
do_dentry_open+0x7ce/0x1420 fs/open.c:962
vfs_open+0x3b/0x340 fs/open.c:1094
do_open fs/namei.c:4637 [inline]
path_openat+0x3486/0x3e20 fs/namei.c:4796
do_filp_open+0x22d/0x490 fs/namei.c:4823
do_sys_openat2+0x12f/0x220 fs/open.c:1430
do_sys_open fs/open.c:1436 [inline]
__do_sys_openat fs/open.c:1452 [inline]
__se_sys_openat fs/open.c:1447 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1447
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
Modules linked in:
CPU: 0 UID: 0 PID: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758
BUG: Bad page state in process syz.0.3463 pfn:30783
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888030783000 pfn:0x30783
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021695000 0000000000000000
raw: ffff888030783000 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 17163, tgid 17159 (syz.0.3463), ts 457094876199, free_ts 457073010535
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:992
netif_skb_check_for_xdp net/core/dev.c:5499 [inline]
netif_receive_generic_xdp net/core/dev.c:5540 [inline]
do_xdp_generic+0x76b/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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 17156 tgid 17156 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
__slab_free+0x2ce/0x320 mm/slub.c:6008
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4953 [inline]
slab_alloc_node mm/slub.c:5263 [inline]
kmem_cache_alloc_noprof+0x370/0x6e0 mm/slub.c:5270
proc_reg_open+0x1f4/0x540 fs/proc/inode.c:502
do_dentry_open+0x7ce/0x1420 fs/open.c:962
vfs_open+0x3b/0x340 fs/open.c:1094
do_open fs/namei.c:4637 [inline]
path_openat+0x3486/0x3e20 fs/namei.c:4796
do_filp_open+0x22d/0x490 fs/namei.c:4823
do_sys_openat2+0x12f/0x220 fs/open.c:1430
do_sys_open fs/open.c:1436 [inline]
__do_sys_openat fs/open.c:1452 [inline]
__se_sys_openat fs/open.c:1447 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1447
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
Modules linked in:
CPU: 0 UID: 0 PID: 17163 Comm: syz.0.3463 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x603/0x1490 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xac5/0x12e0 net/core/dev.c:5608
__netif_receive_skb_core+0x10e5/0x3150 net/core/dev.c:5961
__netif_receive_skb_one_core net/core/dev.c:6149 [inline]
__netif_receive_skb net/core/dev.c:6264 [inline]
netif_receive_skb_internal net/core/dev.c:6350 [inline]
netif_receive_skb+0x1fe/0xbb0 net/core/dev.c:6409
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 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+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: 0033:0x7fbde955b78e
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:00007fbdea39dfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fbdea39e6c0 RCX: 00007fbde955b78e
RDX: 0000000000011dc0 RSI: 00002000000037c0 RDI: 00000000000000c8
RBP: 00007fbde9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbde9816128 R14: 00007fbde9816090 R15: 00007ffe9b06e758