BUG: Bad page state in process syz.0.946 pfn:104a24 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7ff9b pfn:0x104a24 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 000000000007ff9b 3fffffffffffffff 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Not tainted syzkaller #0 PREEMPT(lazy) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:11b3c4 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11b3c4 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:11bae6 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7ff98 pfn:0x11bae6 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 000000000007ff98 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:11a99b page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x7ff99 pfn:0x11a99b flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 000000000007ff99 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:105b4a page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x3b pfn:0x105b4a flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 000000000000003b 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:11bc92 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11bc92 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:11e1a9 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x39 pfn:0x11e1a9 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 0000000000000039 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:11e1d7 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x51 pfn:0x11e1d7 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 0000000000000051 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:11e32f page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e32f flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 0000000000000000 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:11d48b page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x3c pfn:0x11d48b flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 000000000000003c 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:1103a3 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x4f pfn:0x1103a3 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 000000000000004f 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 BUG: Bad page state in process syz.0.946 pfn:10c9d2 page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x4e pfn:0x10c9d2 flags: 0x200000000000000(node=0|zone=2) raw: 0200000000000000 dead000000000040 ffff888100ba3800 0000000000000000 raw: 000000000000004e 0000000000000001 00000000ffffffff 0000000000000000 page dumped because: page_pool leak Modules linked in: CPU: 0 UID: 0 PID: 12770 Comm: syz.0.946 Tainted: G B syzkaller #0 PREEMPT(lazy) Tainted: [B]=BAD_PAGE Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: __dump_stack+0x1d/0x30 lib/dump_stack.c:94 dump_stack_lvl+0x95/0xd0 lib/dump_stack.c:120 dump_stack+0x15/0x1b lib/dump_stack.c:129 bad_page+0xee/0x100 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+0x501/0x510 mm/page_alloc.c:2962 page_frag_free+0x11d/0x120 mm/page_frag_cache.c:169 __xdp_return+0x154/0x450 net/core/xdp.c:448 bpf_xdp_shrink_data net/core/filter.c:4383 [inline] bpf_xdp_frags_shrink_tail+0x2e1/0x430 net/core/filter.c:4407 ____bpf_xdp_adjust_tail net/core/filter.c:4429 [inline] bpf_xdp_adjust_tail+0x125/0x130 net/core/filter.c:4422 bpf_prog_5d7dc57dfd7f985a+0x1e/0x24 bpf_dispatcher_xdp_func+0x25/0x30 net/core/filter.c:12177 __bpf_prog_run include/linux/filter.h:779 [inline] bpf_prog_run_xdp include/net/xdp.h:701 [inline] bpf_prog_run_generic_xdp+0x37b/0xb20 net/core/dev.c:5579 netif_receive_generic_xdp net/core/dev.c:5699 [inline] do_xdp_generic+0x477/0x800 net/core/dev.c:5761 tun_get_user+0x18d8/0x28e0 drivers/net/tun.c:1967 tun_chr_write_iter+0x15a/0x210 drivers/net/tun.c:2094 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x57f/0x9a0 fs/read_write.c:687 ksys_write+0xdc/0x1a0 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __x64_sys_write+0x40/0x50 fs/read_write.c:747 x64_sys_call+0x154e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0da9bfea0e 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:00007f0da8675fb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f0da86766c0 RCX: 00007f0da9bfea0e RDX: 000000000000fdef RSI: 00002000000017c0 RDI: 00000000000000c8 RBP: 00007f0da9cd5888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0da9ec6128 R14: 00007f0da9ec6090 R15: 00007fff1910ccd8 EXT4-fs error (device sda1): ext4_discard_preallocations:5690: comm syz.0.946: Error -117 loading buddy information for 3 EXT4-fs error (device sda1): ext4_discard_preallocations:5690: comm syz.0.946: Error -117 loading buddy information for 3