BUG: Bad page state in process syz.1.3758 pfn:7975e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x20000025e pfn:0x7975e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 000000020000025e 3fffffffffffffff 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 20337, tgid 20334 (syz.1.3758), ts 687825248877, free_ts 687429136537
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+0xb7b/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:527bd
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x20000025f pfn:0x527bd
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 000000020000025f 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 20337, tgid 20334 (syz.1.3758), ts 687825222576, free_ts 687429152838
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:61990
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000260 pfn:0x61990
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000260 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 20337, tgid 20334 (syz.1.3758), ts 687825205440, free_ts 687429168585
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:3df4e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000261 pfn:0x3df4e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000261 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 20337, tgid 20334 (syz.1.3758), ts 687825188491, free_ts 687429184850
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:6bfc2
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000262 pfn:0x6bfc2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000262 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 20337, tgid 20334 (syz.1.3758), ts 687825171689, free_ts 687429201250
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:3e68d
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000263 pfn:0x3e68d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000263 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 20337, tgid 20334 (syz.1.3758), ts 687825154481, free_ts 687429217948
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:795e5
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000264 pfn:0x795e5
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000264 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 20337, tgid 20334 (syz.1.3758), ts 687825137369, free_ts 687429236247
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:3aa5f
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000265 pfn:0x3aa5f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000265 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 20337, tgid 20334 (syz.1.3758), ts 687825120210, free_ts 687429252401
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:8c567
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000266 pfn:0x8c567
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000266 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 20337, tgid 20334 (syz.1.3758), ts 687825103203, free_ts 687429268363
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:78d5f
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000267 pfn:0x78d5f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000267 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 20337, tgid 20334 (syz.1.3758), ts 687825086165, free_ts 687429285845
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:3e71d
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000268 pfn:0x3e71d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000268 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 20337, tgid 20334 (syz.1.3758), ts 687825069366, free_ts 687429302223
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188
BUG: Bad page state in process syz.1.3758 pfn:348ae
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x200000269 pfn:0x348ae
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff888021280000 0000000000000000
raw: 0000000200000269 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 20337, tgid 20334 (syz.1.3758), ts 687825053379, free_ts 687429319445
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+0xb59/0x1410 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+0x715/0x1280 net/core/dev.c:5608
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 5903 tgid 5903 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1433 [inline]
__free_frozen_pages+0xbb0/0xd10 mm/page_alloc.c:2973
__folio_put+0x227/0x2c0 mm/swap.c:112
unpin_user_pages_dirty_lock+0x391/0x500 mm/gup.c:324
xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline]
xdp_umem_release+0xdc/0x220 net/xdp/xdp_umem.c:61
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0x89f/0xd90 kernel/workqueue.c:3421
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: 20337 Comm: syz.1.3758 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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+0xcc2/0xd10 mm/page_alloc.c:2973
bpf_xdp_shrink_data net/core/filter.c:4202 [inline]
bpf_xdp_frags_shrink_tail+0x4f7/0x7f0 net/core/filter.c:4226
____bpf_xdp_adjust_tail net/core/filter.c:4248 [inline]
bpf_xdp_adjust_tail+0x1d6/0x220 net/core/filter.c:4241
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x623/0x13f0 net/core/dev.c:5430
netif_receive_generic_xdp net/core/dev.c:5546 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5608
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: 0033:0x7f8c6f55b58e
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:00007f8c6d7f5fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8c6d7f66c0 RCX: 00007f8c6f55b58e
RDX: 000000000000fed7 RSI: 00002000000002c0 RDI: 00000000000000c8
RBP: 00007f8c6f608bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8c6f816128 R14: 00007f8c6f816090 R15: 00007fffe5fed188