BUG: Bad page state in process syz.6.4177 pfn:6b72c
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6b72c
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 0000000000000000
raw: 0000000000000000 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 21881, tgid 21880 (syz.6.4177), ts 1570044165285, free_ts 1569776790456
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
page_pool_alloc_frag_netmem+0x21d/0xa00 net/core/page_pool.c:1076
page_pool_alloc_netmem include/net/page_pool/helpers.h:131 [inline]
page_pool_alloc include/net/page_pool/helpers.h:167 [inline]
page_pool_dev_alloc include/net/page_pool/helpers.h:188 [inline]
skb_pp_cow_data+0x5be/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:6b72d
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6b72d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570044144845, free_ts 1569776803355
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:6b72e
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6b72e
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570044125855, free_ts 1569776816296
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:6b72f
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6b72f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570044106565, free_ts 1569776829536
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:99300
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888099306000 pfn:0x99300
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 0000000000000000
raw: ffff888099306000 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 21881, tgid 21880 (syz.6.4177), ts 1570044087035, free_ts 1569776911096
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:99301
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffffffffffffff pfn:0x99301
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570044068165, free_ts 1569776924875
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:99302
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99302
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570044049125, free_ts 1569776937846
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:99303
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99303
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570044029845, free_ts 1569776952096
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:99304
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99304
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570044010205, free_ts 1569776965096
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:99305
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99305
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570043991325, free_ts 1569776978146
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:99306
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99306
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570043972485, free_ts 1569776991016
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018
BUG: Bad page state in process syz.6.4177 pfn:99307
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99307
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 dead000000000040 ffff8880236a7000 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 21881, tgid 21880 (syz.6.4177), ts 1570043953424, free_ts 1569777003746
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x153/0x170 mm/page_alloc.c:1888
prep_new_page mm/page_alloc.c:1896 [inline]
get_page_from_freelist+0x111d/0x3140 mm/page_alloc.c:3961
__alloc_frozen_pages_noprof+0x27c/0x2ba0 mm/page_alloc.c:5249
__alloc_pages_noprof mm/page_alloc.c:5283 [inline]
alloc_pages_bulk_noprof+0x782/0x1490 mm/page_alloc.c:5203
alloc_pages_bulk_node_noprof include/linux/gfp.h:255 [inline]
__page_pool_alloc_netmems_slow+0x1c6/0xc10 net/core/page_pool.c:616
page_pool_alloc_netmems net/core/page_pool.c:667 [inline]
page_pool_alloc_netmems+0xc4/0x1a0 net/core/page_pool.c:654
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+0x7f9/0xea0 net/core/skbuff.c:993
skb_cow_data_for_xdp+0x88/0xb0 net/core/skbuff.c:1027
netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
netif_receive_generic_xdp net/core/dev.c:5538 [inline]
do_xdp_generic+0x56b/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 18145 tgid 18145 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1432 [inline]
__free_frozen_pages+0x7ca/0x10a0 mm/page_alloc.c:2977
vfree.part.0+0x12b/0x9d0 mm/vmalloc.c:3479
vfree mm/vmalloc.c:3456 [inline]
delayed_vfree_work+0x8e/0xd0 mm/vmalloc.c:3398
process_one_work+0x9d7/0x1920 kernel/workqueue.c:3275
process_scheduled_works kernel/workqueue.c:3358 [inline]
worker_thread+0x5da/0xe40 kernel/workqueue.c:3439
kthread+0x370/0x450 kernel/kthread.c:467
ret_from_fork+0x754/0xd80 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: 21881 Comm: syz.6.4177 Tainted: G B syzkaller #0 PREEMPT(full)
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
bad_page.cold+0xbe/0xdf mm/page_alloc.c:676
free_page_is_bad mm/page_alloc.c:1120 [inline]
free_page_is_bad mm/page_alloc.c:1114 [inline]
__free_pages_prepare mm/page_alloc.c:1424 [inline]
__free_frozen_pages+0x7fe/0x10a0 mm/page_alloc.c:2977
page_frag_free+0x284/0x2e0 mm/page_frag_cache.c:169
__xdp_return+0x3cd/0xb90 net/core/xdp.c:448
bpf_xdp_shrink_data net/core/filter.c:4204 [inline]
bpf_xdp_frags_shrink_tail net/core/filter.c:4228 [inline]
____bpf_xdp_adjust_tail net/core/filter.c:4250 [inline]
bpf_xdp_adjust_tail+0x854/0xb60 net/core/filter.c:4243
bpf_prog_5d7dc57dfd7f985a+0x1e/0x24
__bpf_prog_run include/linux/filter.h:723 [inline]
bpf_prog_run_xdp include/net/xdp.h:696 [inline]
bpf_prog_run_generic_xdp+0x614/0x1610 net/core/dev.c:5428
netif_receive_generic_xdp net/core/dev.c:5544 [inline]
do_xdp_generic+0x92e/0x12c0 net/core/dev.c:5606
tun_get_user+0x1bd2/0x3e10 drivers/net/tun.c:1872
tun_chr_write_iter+0xdc/0x200 drivers/net/tun.c:1999
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6ac/0x1070 fs/read_write.c:688
ksys_write+0x12a/0x250 fs/read_write.c:740
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a12b5c84e
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:00007f6a13b19fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6a13b1a6c0 RCX: 00007f6a12b5c84e
RDX: 000000000000fdef RSI: 0000200000000400 RDI: 00000000000000c8
RBP: 00007f6a12c327e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6a12e16038 R14: 00007f6a12e15fa0 R15: 00007ffd43880018