Warning: Permanently added '10.128.1.106' (ED25519) to the list of known hosts. 2026/07/23 22:18:20 parsed 1 programs 2026/07/23 22:18:20 serving rpc on tcp://43825 [ 25.733186][ T24] audit: type=1400 audit(1784845100.650:64): avc: denied { node_bind } for pid=287 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 25.754698][ T24] audit: type=1400 audit(1784845100.650:65): avc: denied { create } for pid=287 comm="syz-execprog" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=rawip_socket permissive=1 [ 25.774528][ T24] audit: type=1400 audit(1784845100.650:66): avc: denied { module_request } for pid=287 comm="syz-execprog" kmod="net-pf-2-proto-262-type-1" scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:kernel_t tclass=system permissive=1 [ 26.662846][ T24] audit: type=1400 audit(1784845101.580:67): avc: denied { mounton } for pid=293 comm="syz-executor" path="/syzcgroup/unified" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:root_t tclass=dir permissive=1 [ 26.666854][ T293] cgroup: Unknown subsys name 'net' [ 26.685678][ T24] audit: type=1400 audit(1784845101.580:68): avc: denied { mount } for pid=293 comm="syz-executor" name="/" dev="cgroup2" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 26.712830][ T24] audit: type=1400 audit(1784845101.610:69): avc: denied { unmount } for pid=293 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 26.713292][ T293] cgroup: Unknown subsys name 'devices' [ 26.858215][ T293] cgroup: Unknown subsys name 'hugetlb' [ 26.864029][ T293] cgroup: Unknown subsys name 'rlimit' [ 27.011686][ T24] audit: type=1400 audit(1784845101.930:70): avc: denied { setattr } for pid=293 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=253 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 27.034852][ T24] audit: type=1400 audit(1784845101.930:71): avc: denied { create } for pid=293 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 Setting up swapspace version 1, size = 127995904 bytes [ 27.051997][ T297] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 27.055914][ T24] audit: type=1400 audit(1784845101.930:72): avc: denied { write } for pid=293 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 27.084297][ T24] audit: type=1400 audit(1784845101.930:73): avc: denied { read } for pid=293 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 27.104683][ T293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 27.519171][ T299] request_module fs-gadgetfs succeeded, but still no fs? [ 27.529979][ T299] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 28.152533][ T350] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.159815][ T350] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.167364][ T350] device bridge_slave_0 entered promiscuous mode [ 28.174183][ T350] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.181368][ T350] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.188791][ T350] device bridge_slave_1 entered promiscuous mode [ 28.227567][ T350] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.234621][ T350] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.241944][ T350] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.249006][ T350] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.266653][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.274256][ T333] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.281525][ T333] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.291050][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.299345][ T333] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.306425][ T333] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.315486][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.323847][ T333] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.330888][ T333] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.342498][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.352016][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.365469][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.377188][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.385226][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.392885][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.401152][ T350] device veth0_vlan entered promiscuous mode [ 28.415457][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.424548][ T350] device veth1_macvtap entered promiscuous mode [ 28.439140][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.449293][ T333] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/07/23 22:18:23 executed programs: 0 [ 28.727357][ T365] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.734445][ T365] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.742061][ T365] device bridge_slave_0 entered promiscuous mode [ 28.749299][ T365] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.756488][ T365] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.763873][ T365] device bridge_slave_1 entered promiscuous mode [ 28.828103][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 28.835652][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.851300][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 28.861578][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.869811][ T354] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.876883][ T354] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.885202][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 28.893602][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.901907][ T354] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.908989][ T354] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.917645][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 28.925273][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.944746][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.953850][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.965873][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.975288][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.982748][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.992059][ T365] device veth0_vlan entered promiscuous mode [ 29.003220][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 29.012483][ T365] device veth1_macvtap entered promiscuous mode [ 29.022016][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 29.032598][ T354] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 29.126534][ T394] ================================================================== [ 29.134676][ T394] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 29.142761][ T394] Read of size 4 at addr ffff88811154cc00 by task syz.2.17/394 [ 29.150308][ T394] [ 29.152664][ T394] CPU: 0 PID: 394 Comm: syz.2.17 Not tainted syzkaller #0 [ 29.159782][ T394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 [ 29.169843][ T394] Call Trace: [ 29.173160][ T394] __dump_stack+0x21/0x24 [ 29.177530][ T394] dump_stack_lvl+0x1a7/0x208 [ 29.182215][ T394] ? show_regs_print_info+0x18/0x18 [ 29.187439][ T394] ? thaw_kernel_threads+0x220/0x220 [ 29.192735][ T394] ? __local_bh_enable_ip+0x53/0x80 [ 29.197942][ T394] print_address_description+0x7f/0x2c0 [ 29.203506][ T394] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 29.209243][ T394] kasan_report+0x100/0x140 [ 29.213757][ T394] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 29.219494][ T394] __asan_report_load4_noabort+0x14/0x20 [ 29.225143][ T394] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 29.230704][ T394] pppol2tp_release+0x150/0x2b0 [ 29.235564][ T394] sock_close+0xb8/0x200 [ 29.239815][ T394] ? sock_mmap+0xa0/0xa0 [ 29.244067][ T394] __fput+0x2dc/0x730 [ 29.248059][ T394] ____fput+0x15/0x20 [ 29.252051][ T394] task_work_run+0x127/0x190 [ 29.256657][ T394] do_exit+0xa7c/0x24e0 [ 29.260918][ T394] ? finish_task_switch+0x1b7/0x5a0 [ 29.266125][ T394] ? put_task_struct+0x90/0x90 [ 29.270916][ T394] ? remove_hrtimer+0x225/0x490 [ 29.275781][ T394] ? __kasan_check_write+0x14/0x20 [ 29.280929][ T394] ? _raw_spin_lock_irq+0x95/0xf0 [ 29.285972][ T394] do_group_exit+0x149/0x310 [ 29.290577][ T394] ? __kasan_check_write+0x14/0x20 [ 29.295719][ T394] ? recalc_sigpending+0x1c4/0x230 [ 29.300856][ T394] get_signal+0xfb1/0x1300 [ 29.305289][ T394] arch_do_signal_or_restart+0xe7/0x11b0 [ 29.310961][ T394] ? nanosleep_copyout+0x120/0x120 [ 29.316242][ T394] ? get_timespec64+0x116/0x1b0 [ 29.321118][ T394] ? __ia32_sys_rt_sigreturn+0x730/0x730 [ 29.326771][ T394] ? __x64_sys_clock_nanosleep+0xb0/0xb0 [ 29.332420][ T394] ? debug_smp_processor_id+0x17/0x20 [ 29.337811][ T394] exit_to_user_mode_loop+0xa2/0xe0 [ 29.343024][ T394] exit_to_user_mode_prepare+0x76/0xa0 [ 29.348495][ T394] syscall_exit_to_user_mode+0x1d/0x40 [ 29.353968][ T394] do_syscall_64+0x3d/0x40 [ 29.358398][ T394] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 29.364315][ T394] RIP: 0033:0x7f8131384017 [ 29.368731][ T394] Code: Unable to access opcode bytes at RIP 0x7f8131383fed. [ 29.376101][ T394] RSP: 002b:00007fffbeff1700 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6 [ 29.384551][ T394] RAX: fffffffffffffdfc RBX: 0000555585fdc500 RCX: 00007f8131384017 [ 29.392536][ T394] RDX: 00007fffbeff1740 RSI: 0000000000000000 RDI: 0000000000000000 [ 29.400521][ T394] RBP: 00007f813145eeaf R08: 0000000000000000 R09: 0000000000000000 [ 29.408497][ T394] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 29.416475][ T394] R13: 00007f8131650fac R14: 00007f8131650fa0 R15: 00007f8131650fa0 [ 29.424451][ T394] [ 29.426782][ T394] Allocated by task 393: [ 29.431029][ T394] __kasan_kmalloc+0xd4/0x100 [ 29.435707][ T394] __kmalloc+0x19f/0x330 [ 29.439961][ T394] l2tp_session_create+0x39/0xb60 [ 29.445002][ T394] pppol2tp_connect+0xbf5/0x1640 [ 29.449960][ T394] __sys_connect+0x3ce/0x450 [ 29.454554][ T394] __x64_sys_connect+0x7a/0x90 [ 29.459417][ T394] do_syscall_64+0x31/0x40 [ 29.463834][ T394] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 29.469725][ T394] [ 29.472074][ T394] Freed by task 354: [ 29.475981][ T394] kasan_set_track+0x4a/0x70 [ 29.480594][ T394] kasan_set_free_info+0x23/0x40 [ 29.485540][ T394] ____kasan_slab_free+0x125/0x160 [ 29.490680][ T394] __kasan_slab_free+0x11/0x20 [ 29.495447][ T394] slab_free_freelist_hook+0xc5/0x190 [ 29.500832][ T394] kfree+0xc0/0x270 [ 29.504655][ T394] l2tp_session_put+0xb2/0x1a0 [ 29.509431][ T394] l2tp_session_delete+0x3a9/0x4a0 [ 29.514548][ T394] l2tp_tunnel_del_work+0x180/0x3d0 [ 29.519761][ T394] process_one_work+0x6fd/0xbc0 [ 29.524645][ T394] worker_thread+0xa8e/0x13c0 [ 29.529340][ T394] kthread+0x324/0x3b0 [ 29.533419][ T394] ret_from_fork+0x1f/0x30 [ 29.537833][ T394] [ 29.540190][ T394] The buggy address belongs to the object at ffff88811154cc00 [ 29.540190][ T394] which belongs to the cache kmalloc-512 of size 512 [ 29.554254][ T394] The buggy address is located 0 bytes inside of [ 29.554254][ T394] 512-byte region [ffff88811154cc00, ffff88811154ce00) [ 29.567521][ T394] The buggy address belongs to the page: [ 29.573187][ T394] page:ffffea0004455300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11154c [ 29.583432][ T394] head:ffffea0004455300 order:2 compound_mapcount:0 compound_pincount:0 [ 29.591768][ T394] flags: 0x4000000000010200(slab|head) [ 29.597239][ T394] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 [ 29.605833][ T394] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 29.614427][ T394] page dumped because: kasan: bad access detected [ 29.620843][ T394] page_owner tracks the page as allocated [ 29.626624][ T394] page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 365, ts 29049351063, free_ts 29041495840 [ 29.647028][ T394] prep_new_page+0x176/0x190 [ 29.651641][ T394] get_page_from_freelist+0x225f/0x23f0 [ 29.657193][ T394] __alloc_pages_nodemask+0x29a/0x640 [ 29.662572][ T394] new_slab+0x84/0x3f0 [ 29.666668][ T394] ___slab_alloc+0x2f8/0x4c0 [ 29.671261][ T394] __slab_alloc+0x63/0xa0 [ 29.675608][ T394] kmem_cache_alloc_trace+0x1a8/0x2e0 [ 29.680992][ T394] find_css_set+0x969/0x1620 [ 29.685594][ T394] cgroup_migrate_prepare_dst+0xc4/0xa00 [ 29.691235][ T394] cgroup_attach_task+0x298/0x520 [ 29.696409][ T394] cgroup_procs_write+0x2b1/0x320 [ 29.701447][ T394] cgroup_file_write+0x294/0x560 [ 29.706396][ T394] kernfs_fop_write_iter+0x2bd/0x400 [ 29.711697][ T394] vfs_write+0x770/0xd70 [ 29.715967][ T394] ksys_write+0x14a/0x260 [ 29.720298][ T394] __x64_sys_write+0x7b/0x90 [ 29.724883][ T394] page last free stack trace: [ 29.729574][ T394] __free_pages_ok+0x80b/0x830 [ 29.734341][ T394] __free_pages+0xd8/0x390 [ 29.738781][ T394] __free_slab+0xcf/0x190 [ 29.743141][ T394] unfreeze_partials+0x150/0x180 [ 29.748084][ T394] put_cpu_partial+0xc1/0x180 [ 29.752773][ T394] __slab_free+0x2c9/0x3a0 [ 29.757194][ T394] ___cache_free+0x10e/0x130 [ 29.761784][ T394] qlink_free+0x50/0x90 [ 29.765945][ T394] qlist_free_all+0x5f/0xb0 [ 29.770450][ T394] kasan_quarantine_reduce+0x14a/0x160 [ 29.775908][ T394] __kasan_slab_alloc+0x2f/0xe0 [ 29.781112][ T394] slab_post_alloc_hook+0x5d/0x2f0 [ 29.786228][ T394] kmem_cache_alloc+0x15a/0x2d0 [ 29.791081][ T394] __alloc_skb+0x9e/0x520 [ 29.795433][ T394] netlink_ack+0x35c/0xb30 [ 29.799858][ T394] netlink_rcv_skb+0x267/0x430 [ 29.804627][ T394] [ 29.806958][ T394] Memory state around the buggy address: [ 29.812593][ T394] ffff88811154cb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.820655][ T394] ffff88811154cb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.8287