rocess permissive=1 [ 14.761552][ T28] audit: type=1400 audit(1785825061.209:63): avc: denied { siginh } for pid=225 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.103' (ED25519) to the list of known hosts. 2026/08/04 06:31:11 parsed 1 programs 2026/08/04 06:31:11 serving rpc on tcp://44463 [ 24.821577][ T28] audit: type=1400 audit(1785825071.289:64): avc: denied { node_bind } for pid=295 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 24.847944][ T28] audit: type=1400 audit(1785825071.289:65): avc: denied { module_request } for pid=295 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 [ 25.680377][ T28] audit: type=1400 audit(1785825072.149:66): avc: denied { mounton } for pid=302 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 [ 25.681360][ T302] cgroup: Unknown subsys name 'net' [ 25.703096][ T28] audit: type=1400 audit(1785825072.149:67): avc: denied { mount } for pid=302 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 [ 25.730992][ T28] audit: type=1400 audit(1785825072.179:68): avc: denied { unmount } for pid=302 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 25.731044][ T302] cgroup: Unknown subsys name 'devices' [ 25.889861][ T302] cgroup: Unknown subsys name 'hugetlb' [ 25.895490][ T302] cgroup: Unknown subsys name 'rlimit' [ 26.033835][ T28] audit: type=1400 audit(1785825072.499:69): avc: denied { setattr } for pid=302 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=258 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 26.057236][ T28] audit: type=1400 audit(1785825072.499:70): avc: denied { create } for pid=302 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 26.078018][ T28] audit: type=1400 audit(1785825072.499:71): avc: denied { write } for pid=302 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 26.087016][ T305] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 26.098660][ T28] audit: type=1400 audit(1785825072.499:72): avc: denied { read } for pid=302 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 [ 26.128150][ T28] audit: type=1400 audit(1785825072.499:73): avc: denied { mounton } for pid=302 comm="syz-executor" path="/proc/sys/fs/binfmt_misc" dev="binfmt_misc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:binfmt_misc_fs_t tclass=dir permissive=1 [ 26.189128][ T302] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 26.870122][ T307] request_module fs-gadgetfs succeeded, but still no fs? [ 27.068858][ T316] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.076191][ T316] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.084190][ T316] device bridge_slave_0 entered promiscuous mode [ 27.092364][ T316] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.099835][ T316] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.107208][ T316] device bridge_slave_1 entered promiscuous mode [ 27.147255][ T316] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.154399][ T316] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.161796][ T316] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.168898][ T316] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.188018][ T317] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.195436][ T317] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.203069][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 27.210779][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.220835][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 27.229196][ T317] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.236221][ T317] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.245064][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.254048][ T317] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.261244][ T317] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.278648][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.286942][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.299223][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.311578][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.319587][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.327596][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.336693][ T316] device veth0_vlan entered promiscuous mode [ 27.346660][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.356059][ T316] device veth1_macvtap entered promiscuous mode [ 27.366342][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.376518][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.407330][ T316] syz-executor (316) used greatest stack depth: 21248 bytes left 2026/08/04 06:31:14 executed programs: 0 [ 28.069818][ T8] device bridge_slave_1 left promiscuous mode [ 28.076142][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.084733][ T8] device bridge_slave_0 left promiscuous mode [ 28.091099][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.099920][ T8] device veth1_macvtap left promiscuous mode [ 28.106792][ T8] device veth0_vlan left promiscuous mode [ 28.268829][ T369] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.275880][ T369] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.284526][ T369] device bridge_slave_0 entered promiscuous mode [ 28.292260][ T369] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.299606][ T369] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.307110][ T369] device bridge_slave_1 entered promiscuous mode [ 28.346724][ T369] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.353930][ T369] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.361499][ T369] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.369246][ T369] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.389570][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.397217][ T10] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.404990][ T10] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.414320][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.422618][ T10] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.429669][ T10] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.439063][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.447552][ T10] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.455699][ T10] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.468122][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.477673][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.495089][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.506968][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.516063][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.524155][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.533191][ T369] device veth0_vlan entered promiscuous mode [ 28.546240][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.555662][ T369] device veth1_macvtap entered promiscuous mode [ 28.565053][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.575795][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 28.628312][ C0] ================================================================== [ 28.636762][ C0] BUG: KASAN: use-after-free in rcu_cblist_dequeue+0x6c/0xb0 [ 28.644232][ C0] Read of size 8 at addr ffff888113a7d190 by task ksoftirqd/0/13 [ 28.651968][ C0] [ 28.654300][ C0] CPU: 0 PID: 13 Comm: ksoftirqd/0 Not tainted syzkaller #0 [ 28.661581][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 28.671640][ C0] Call Trace: [ 28.674923][ C0] [ 28.677859][ C0] __dump_stack+0x21/0x24 [ 28.682221][ C0] dump_stack_lvl+0x110/0x170 [ 28.687067][ C0] ? __cfi_dump_stack_lvl+0x8/0x8 [ 28.692158][ C0] ? debug_smp_processor_id+0x17/0x20 [ 28.697741][ C0] ? rcu_cblist_dequeue+0x6c/0xb0 [ 28.702796][ C0] print_address_description+0x71/0x200 [ 28.708550][ C0] print_report+0x4a/0x60 [ 28.712910][ C0] kasan_report+0x122/0x150 [ 28.717544][ C0] ? rcu_cblist_dequeue+0x6c/0xb0 [ 28.722603][ C0] __asan_report_load8_noabort+0x14/0x20 [ 28.728268][ C0] rcu_cblist_dequeue+0x6c/0xb0 [ 28.733155][ C0] rcu_do_batch+0x4bc/0xc30 [ 28.737722][ C0] ? rcu_core+0xf00/0xf00 [ 28.742092][ C0] rcu_core+0x486/0xf00 [ 28.746280][ C0] ? kvm_sched_clock_read+0x18/0x40 [ 28.751511][ C0] ? sched_clock+0x9/0x10 [ 28.755879][ C0] ? rcu_cpu_kthread_park+0x90/0x90 [ 28.761144][ C0] ? __this_cpu_preempt_check+0x13/0x20 [ 28.766729][ C0] ? rcu_softirq_qs+0xd5/0x340 [ 28.773732][ C0] ? __cfi_rcu_softirq_qs+0x10/0x10 [ 28.779065][ C0] ? irqtime_account_irq+0x75/0x240 [ 28.784810][ C0] rcu_core_si+0x9/0x10 [ 28.789169][ C0] handle_softirqs+0x1d7/0x600 [ 28.794269][ C0] ? __cfi_run_ksoftirqd+0x10/0x10 [ 28.799859][ C0] run_ksoftirqd+0x28/0x30 [ 28.804305][ C0] smpboot_thread_fn+0x48c/0x8e0 [ 28.809778][ C0] kthread+0x281/0x320 [ 28.813998][ C0] ? __cfi_smpboot_thread_fn+0x10/0x10 [ 28.819564][ C0] ? __cfi_kthread+0x10/0x10 [ 28.824167][ C0] ret_from_fork+0x1f/0x30 [ 28.828607][ C0] [ 28.831626][ C0] [ 28.833943][ C0] Allocated by task 374: [ 28.838184][ C0] kasan_set_track+0x4b/0x70 [ 28.842890][ C0] kasan_save_alloc_info+0x1f/0x30 [ 28.848092][ C0] __kasan_kmalloc+0x95/0xb0 [ 28.852723][ C0] __kmalloc+0xb4/0x1e0 [ 28.856898][ C0] l2tp_session_create+0x38/0xbd0 [ 28.861933][ C0] pppol2tp_connect+0xbf5/0x1640 [ 28.867062][ C0] __sys_connect+0x3da/0x460 [ 28.871713][ C0] __x64_sys_connect+0x7a/0x90 [ 28.876594][ C0] x64_sys_call+0x88d/0x9a0 [ 28.881142][ C0] do_syscall_64+0x4c/0xa0 [ 28.885772][ C0] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 28.891778][ C0] [ 28.894109][ C0] Freed by task 317: [ 28.898108][ C0] kasan_set_track+0x4b/0x70 [ 28.902795][ C0] kasan_save_free_info+0x2b/0x40 [ 28.907818][ C0] ____kasan_slab_free+0x132/0x180 [ 28.913162][ C0] __kasan_slab_free+0x11/0x20 [ 28.918473][ C0] slab_free_freelist_hook+0xc2/0x190 [ 28.924149][ C0] __kmem_cache_free+0xb7/0x1b0 [ 28.930014][ C0] kfree+0x6f/0xf0 [ 28.933790][ C0] l2tp_session_put+0xaf/0x1a0 [ 28.938571][ C0] l2tp_session_delete+0x3df/0x4d0 [ 28.944618][ C0] l2tp_tunnel_del_work+0x199/0x410 [ 28.949839][ C0] process_one_work+0x717/0xc30 [ 28.954709][ C0] worker_thread+0xa4d/0x11d0 [ 28.959395][ C0] kthread+0x281/0x320 [ 28.963478][ C0] ret_from_fork+0x1f/0x30 [ 28.967928][ C0] [ 28.970342][ C0] Last potentially related work creation: [ 28.976234][ C0] kasan_save_stack+0x3a/0x60 [ 28.980909][ C0] __kasan_record_aux_stack+0xb6/0xc0 [ 28.986293][ C0] kasan_record_aux_stack_noalloc+0xb/0x10 [ 28.992129][ C0] call_rcu+0xcf/0xf50 [ 28.996389][ C0] pppol2tp_release+0x1e3/0x2b0 [ 29.001786][ C0] sock_close+0xc9/0x220 [ 29.006333][ C0] __fput+0x1fd/0x8f0 [ 29.010942][ C0] ____fput+0x15/0x20 [ 29.015025][ C0] task_work_run+0x1e1/0x250 [ 29.020026][ C0] exit_to_user_mode_loop+0x9b/0xb0 [ 29.025599][ C0] exit_to_user_mode_prepare+0x87/0xd0 [ 29.031428][ C0] syscall_exit_to_user_mode+0x1a/0x30 [ 29.037256][ C0] do_syscall_64+0x58/0xa0 [ 29.041789][ C0] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 29.047986][ C0] [ 29.050411][ C0] The buggy address belongs to the object at ffff888113a7d000 [ 29.050411][ C0] which belongs to the cache kmalloc-512 of size 512 [ 29.064909][ C0] The buggy address is located 400 bytes inside of [ 29.064909][ C0] 512-byte region [ffff888113a7d000, ffff888113a7d200) [ 29.078461][ C0] [ 29.080783][ C0] The buggy address belongs to the physical page: [ 29.087224][ C0] page:ffffea00044e9f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113a7c [ 29.097652][ C0] head:ffffea00044e9f00 order:2 compound_mapcount:0 compound_pincount:0 [ 29.106166][ C0] flags: 0x4000000000010200(slab|head|zone=1) [ 29.112861][ C0] raw: 4000000000010200 0000000000000000 dead000000000001 ffff888100042f00 [ 29.121476][ C0] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 [ 29.130650][ C0] page dumped because: kasan: bad access detected [ 29.137995][ C0] page_owner tracks the page as allocated [ 29.143717][ C0] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 111, tgid 111 (udevd), ts 4217948665, free_ts 0 [ 29.164047][ C0] post_alloc_hook+0x1f5/0x210 [ 29.169435][ C0] prep_new_page+0x1c/0x110 [ 29.174207][ C0] get_page_from_freelist+0x2ca9/0x2d20 [ 29.179784][ C0] __alloc_pages+0x1fa/0x610 [ 29.184396][ C0] alloc_slab_page+0x6e/0xf0 [ 29.190140][ C0] new_slab+0x98/0x3e0 [ 29.194230][ C0] ___slab_alloc+0x70f/0xb70 [ 29.198921][ C0] __slab_alloc+0x5e/0xa0 [ 29.203548][ C0] __kmem_cache_alloc_node+0x204/0x2d0 [ 29.209044][ C0] __kmalloc_node_track_caller+0xa1/0x1e0 [ 29.214770][ C0] __alloc_skb+0x226/0x4a0 [ 29.219183][ C0] alloc_skb_with_frags+0xa8/0x620 [ 29.224298][ C0] sock_alloc_send_pskb+0x87f/0x9a0 [ 29.229680][ C0] unix_dgram_sendmsg+0x5c1/0x1710 [ 29.235440][ C0] sock_write_iter+0x2ea/0x3f0 [ 29.240320][ C0] vfs_write+0x5ef/0xd00 [ 29.244576][ C0] page_owner free stack trace missing [ 29.250463][ C0] [ 29.254262][ C0] Memory state around the buggy address: [ 29.259995][ C0] ffff888113a7d080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.268079][ C0] ffff888113a7d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.276162][ C0] >ffff888113a7d180: fb fb fb fb fb fb f