BUG: Bad page state in process syz.3.897 pfn:4d758
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804d758000 pfn:0x4d758
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: ffff88804d758000 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 9848, tgid 9847 (syz.3.897), ts 337678067428
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
page_pool_alloc_netmems net/core/page_pool.c:688 [inline]
page_pool_alloc_frag_netmem+0x561/0x9b0 net/core/page_pool.c:1090
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+0xc2c/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337674886661 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:4d759
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x4d759
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: ffffffffffffffff 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337678046579
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337674902038 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:4d75a
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4d75a
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337678026389
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337674917769 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:4d75b
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4d75b
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337678005429
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337674932856 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:4d75c
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4d75c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337677986807
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337674948180 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:4d75d
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4d75d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337677968208
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337674963462 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:4d75e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4d75e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337677947975
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337674978824 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:4d75f
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4d75f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337677927189
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337674995240 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:53140
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888053142000 pfn:0x53140
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: ffff888053142000 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 9848, tgid 9847 (syz.3.897), ts 337677906964
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337675010581 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:53141
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x53141
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: ffffffffffffffff 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337677887386
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337675025968 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:53142
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x53142
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337677867343
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337675041329 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8
BUG: Bad page state in process syz.3.897 pfn:53143
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x53143
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff88801c74a000 0000000000000000
raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000
page dumped because: page_pool leak
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2820(GFP_ATOMIC|__GFP_NOWARN), pid 9848, tgid 9847 (syz.3.897), ts 337677847496
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471
alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295
alloc_pages_bulk_node_noprof include/linux/gfp.h:235 [inline]
__page_pool_alloc_netmems_slow+0x14f/0x720 net/core/page_pool.c:637
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+0xc08/0x18e0 net/core/skbuff.c:990
netif_skb_check_for_xdp net/core/dev.c:5760 [inline]
netif_receive_generic_xdp net/core/dev.c:5801 [inline]
do_xdp_generic+0x78f/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 6245 tgid 6245 ts 337675056621 stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0xc93/0xd90 mm/page_alloc.c:2962
kasan_depopulate_vmalloc_pte+0x6d/0x90 mm/kasan/shadow.c:484
apply_to_pte_range mm/memory.c:3470 [inline]
apply_to_pmd_range mm/memory.c:3514 [inline]
apply_to_pud_range mm/memory.c:3550 [inline]
apply_to_p4d_range mm/memory.c:3586 [inline]
__apply_to_page_range+0xbd8/0x1420 mm/memory.c:3622
__kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:602
kasan_release_vmalloc include/linux/kasan.h:593 [inline]
kasan_release_vmalloc_node mm/vmalloc.c:2306 [inline]
purge_vmap_node+0x220/0x960 mm/vmalloc.c:2328
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Modules linked in:
CPU: 0 UID: 0 PID: 9848 Comm: syz.3.897 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
bad_page+0x17f/0x1c0 mm/page_alloc.c:647
free_page_is_bad mm/page_alloc.c:1082 [inline]
__free_pages_prepare mm/page_alloc.c:1409 [inline]
__free_frozen_pages+0xd37/0xd90 mm/page_alloc.c:2962
bpf_xdp_shrink_data net/core/filter.c:4383 [inline]
bpf_xdp_frags_shrink_tail+0x4ed/0x800 net/core/filter.c:4407
____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline]
bpf_xdp_adjust_tail+0x1ce/0x210 net/core/filter.c:4422
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:768 [inline]
bpf_prog_run_xdp include/net/xdp.h:701 [inline]
bpf_prog_run_generic_xdp+0x12e7/0x1560 net/core/dev.c:5687
netif_receive_generic_xdp net/core/dev.c:5807 [inline]
do_xdp_generic+0xae1/0x12f0 net/core/dev.c:5869
tun_get_user+0x248b/0x4450 drivers/net/tun.c:1967
tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:2094
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd564f5ed8e
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:00007fd565e8ffb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd565e906c0 RCX: 00007fd564f5ed8e
RDX: 000000000000fdef RSI: 0000200000000200 RDI: 00000000000000c8
RBP: 00007fd5650358b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd565226038 R14: 00007fd565225fa0 R15: 00007ffdf4187fd8