BUG: Bad page state in process syz.6.2168 pfn:7bb91
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1c pfn:0x7bb91
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 000000000000001c 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 13548, tgid 13544 (syz.6.2168), ts 763634619782, free_ts 763420234412
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
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:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:56c96
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1d pfn:0x56c96
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 000000000000001d 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 13548, tgid 13544 (syz.6.2168), ts 763634600362, free_ts 763420248897
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:69c43
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1e pfn:0x69c43
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 000000000000001e 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 13548, tgid 13544 (syz.6.2168), ts 763634581172, free_ts 763420263658
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:2690d
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1f pfn:0x2690d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 000000000000001f 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 13548, tgid 13544 (syz.6.2168), ts 763634561717, free_ts 763420549105
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:5e9e4
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x20 pfn:0x5e9e4
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 0000000000000020 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 13548, tgid 13544 (syz.6.2168), ts 763634542093, free_ts 763420571392
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:34666
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x21 pfn:0x34666
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 0000000000000021 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 13548, tgid 13544 (syz.6.2168), ts 763634522773, free_ts 763420584996
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:77ff2
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x22 pfn:0x77ff2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 0000000000000022 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 13548, tgid 13544 (syz.6.2168), ts 763634503315, free_ts 763420598924
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:31d6b
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x23 pfn:0x31d6b
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 0000000000000023 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 13548, tgid 13544 (syz.6.2168), ts 763634483974, free_ts 763420613220
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:5fdd2
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x24 pfn:0x5fdd2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 0000000000000024 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 13548, tgid 13544 (syz.6.2168), ts 763634463964, free_ts 763420627988
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:7ec4c
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x25 pfn:0x7ec4c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 0000000000000025 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 13548, tgid 13544 (syz.6.2168), ts 763634444437, free_ts 763420642230
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98
BUG: Bad page state in process syz.6.2168 pfn:25b8b
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x26 pfn:0x25b8b
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880232bd000 0000000000000000
raw: 0000000000000026 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 13548, tgid 13544 (syz.6.2168), ts 763634425139, free_ts 763420657487
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x231/0x280 mm/page_alloc.c:1883
prep_new_page mm/page_alloc.c:1891 [inline]
get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3956
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5244
__alloc_pages_noprof mm/page_alloc.c:5278 [inline]
alloc_pages_bulk_noprof+0x558/0x700 mm/page_alloc.c:5198
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:5500 [inline]
netif_receive_generic_xdp net/core/dev.c:5541 [inline]
do_xdp_generic+0x715/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
page last free pid 5830 tgid 5830 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1432 [inline]
free_unref_folios+0xda7/0x14d0 mm/page_alloc.c:3034
folios_put_refs+0x58a/0x680 mm/swap.c:1002
folio_batch_release include/linux/pagevec.h:101 [inline]
mapping_try_invalidate+0x3c2/0x4c0 mm/truncate.c:579
btrfs_close_bdev fs/btrfs/volumes.c:1128 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1152 [inline]
close_fs_devices+0x442/0x840 fs/btrfs/volumes.c:1195
btrfs_close_devices+0xcd/0x570 fs/btrfs/volumes.c:1210
btrfs_free_fs_info+0x4f/0x380 fs/btrfs/disk-io.c:1208
deactivate_locked_super+0xbc/0x130 fs/super.c:476
cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Modules linked in:
CPU: 0 UID: 0 PID: 13548 Comm: syz.6.2168 Tainted: G B L syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0xccb/0xd10 mm/page_alloc.c:2972
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:5431
netif_receive_generic_xdp net/core/dev.c:5547 [inline]
do_xdp_generic+0xa6f/0x1280 net/core/dev.c:5609
__netif_receive_skb_core+0x10e5/0x30a0 net/core/dev.c:5962
__netif_receive_skb_one_core net/core/dev.c:6150 [inline]
__netif_receive_skb+0x72/0x370 net/core/dev.c:6265
netif_receive_skb_internal net/core/dev.c:6351 [inline]
netif_receive_skb+0x1bb/0x790 net/core/dev.c:6410
tun_rx_batched+0x1de/0x790 drivers/net/tun.c:1485
tun_get_user+0x2a78/0x3dd0 drivers/net/tun.c:1953
tun_chr_write_iter+0x113/0x210 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x61d/0xb90 fs/read_write.c:688
ksys_write+0x150/0x270 fs/read_write.c:740
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: 0033:0x7fa4a5f5b58e
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:00007fa4a6dd1fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa4a6dd26c0 RCX: 00007fa4a5f5b58e
RDX: 0000000000011dc0 RSI: 0000200000004780 RDI: 00000000000000c8
RBP: 00007fa4a6008bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4a6216128 R14: 00007fa4a6216090 R15: 00007ffdf2a3aa98