rocess permissive=1 [ 11.227410][ T30] audit: type=1400 audit(1782650257.776:63): avc: denied { siginh } for pid=223 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.249' (ED25519) to the list of known hosts. 2026/06/28 12:37:46 parsed 1 programs 2026/06/28 12:37:46 serving rpc on tcp://46061 [ 20.392227][ T30] audit: type=1400 audit(1782650266.956:64): avc: denied { node_bind } for pid=293 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 20.396210][ T30] audit: type=1400 audit(1782650266.956:65): avc: denied { module_request } for pid=293 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 [ 21.003489][ T30] audit: type=1400 audit(1782650267.566:66): avc: denied { mounton } for pid=299 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 [ 21.004529][ T299] cgroup: Unknown subsys name 'net' [ 21.026170][ T30] audit: type=1400 audit(1782650267.566:67): avc: denied { mount } for pid=299 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 [ 21.053445][ T30] audit: type=1400 audit(1782650267.596:68): avc: denied { unmount } for pid=299 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 21.053597][ T299] cgroup: Unknown subsys name 'devices' [ 21.201086][ T299] cgroup: Unknown subsys name 'hugetlb' [ 21.206675][ T299] cgroup: Unknown subsys name 'rlimit' [ 21.348192][ T30] audit: type=1400 audit(1782650267.906:69): avc: denied { setattr } for pid=299 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=254 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 21.371476][ T30] audit: type=1400 audit(1782650267.906:70): avc: denied { create } for pid=299 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 21.392015][ T30] audit: type=1400 audit(1782650267.906:71): avc: denied { write } for pid=299 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 21.397579][ T303] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 21.412314][ T30] audit: type=1400 audit(1782650267.906:72): avc: denied { read } for pid=299 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 [ 21.441002][ T30] audit: type=1400 audit(1782650267.906:73): avc: denied { mounton } for pid=299 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 [ 21.470685][ T299] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 21.856103][ T306] request_module fs-gadgetfs succeeded, but still no fs? [ 21.947563][ T311] bridge0: port 1(bridge_slave_0) entered blocking state [ 21.954629][ T311] bridge0: port 1(bridge_slave_0) entered disabled state [ 21.961987][ T311] device bridge_slave_0 entered promiscuous mode [ 21.968754][ T311] bridge0: port 2(bridge_slave_1) entered blocking state [ 21.975783][ T311] bridge0: port 2(bridge_slave_1) entered disabled state [ 21.983039][ T311] device bridge_slave_1 entered promiscuous mode [ 22.015040][ T311] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.022100][ T311] bridge0: port 2(bridge_slave_1) entered forwarding state [ 22.029344][ T311] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.036364][ T311] bridge0: port 1(bridge_slave_0) entered forwarding state [ 22.053617][ T312] bridge0: port 1(bridge_slave_0) entered disabled state [ 22.060891][ T312] bridge0: port 2(bridge_slave_1) entered disabled state [ 22.068176][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 22.075719][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 22.085299][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 22.093460][ T312] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.100480][ T312] bridge0: port 1(bridge_slave_0) entered forwarding state [ 22.109395][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 22.117733][ T312] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.124772][ T312] bridge0: port 2(bridge_slave_1) entered forwarding state [ 22.136764][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 22.145796][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 22.158184][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 22.169475][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 22.177560][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 22.185060][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 22.194080][ T311] device veth0_vlan entered promiscuous mode [ 22.202969][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 22.211799][ T311] device veth1_macvtap entered promiscuous mode [ 22.220509][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 22.230228][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 22.256911][ T311] syz-executor (311) used greatest stack depth: 21344 bytes left 2026/06/28 12:37:49 executed programs: 0 [ 22.855316][ T368] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.862387][ T368] bridge0: port 1(bridge_slave_0) entered disabled state [ 22.869949][ T368] device bridge_slave_0 entered promiscuous mode [ 22.879308][ T368] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.886378][ T368] bridge0: port 2(bridge_slave_1) entered disabled state [ 22.893708][ T368] device bridge_slave_1 entered promiscuous mode [ 22.926281][ T368] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.933322][ T368] bridge0: port 2(bridge_slave_1) entered forwarding state [ 22.940571][ T368] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.947586][ T368] bridge0: port 1(bridge_slave_0) entered forwarding state [ 22.967757][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 22.975718][ T312] bridge0: port 1(bridge_slave_0) entered disabled state [ 22.982946][ T312] bridge0: port 2(bridge_slave_1) entered disabled state [ 22.991450][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 23.000100][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 23.008184][ T312] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.015242][ T312] bridge0: port 1(bridge_slave_0) entered forwarding state [ 23.023604][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 23.031981][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 23.040322][ T312] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.047330][ T312] bridge0: port 2(bridge_slave_1) entered forwarding state [ 23.061054][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 23.069098][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 23.077959][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 23.086076][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 23.101821][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 23.110113][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 23.120539][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 23.128388][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 23.136519][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 23.144250][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 23.152196][ T368] device veth0_vlan entered promiscuous mode [ 23.164656][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 23.172770][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 23.181627][ T368] device veth1_macvtap entered promiscuous mode [ 23.191212][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 23.198806][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 23.206985][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 23.215281][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 23.223818][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 23.234164][ T45] device bridge_slave_1 left promiscuous mode [ 23.240351][ T45] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.247693][ T45] device bridge_slave_0 left promiscuous mode [ 23.253861][ T45] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.261731][ T45] device veth1_macvtap left promiscuous mode [ 23.267707][ T45] device veth0_vlan left promiscuous mode [ 23.390094][ C1] ================================================================== [ 23.398186][ C1] BUG: KASAN: use-after-free in rcu_cblist_dequeue+0x6c/0xb0 [ 23.405575][ C1] Read of size 8 at addr ffff8881103a1190 by task ksoftirqd/1/25 [ 23.413293][ C1] [ 23.415614][ C1] CPU: 1 PID: 25 Comm: ksoftirqd/1 Not tainted syzkaller #0 [ 23.422887][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 23.432945][ C1] Call Trace: [ 23.436224][ C1] [ 23.439149][ C1] __dump_stack+0x21/0x30 [ 23.443480][ C1] dump_stack_lvl+0x110/0x170 [ 23.448171][ C1] ? show_regs_print_info+0x20/0x20 [ 23.453361][ C1] ? load_image+0x3f0/0x3f0 [ 23.457864][ C1] print_address_description+0x7f/0x2c0 [ 23.463411][ C1] ? rcu_cblist_dequeue+0x6c/0xb0 [ 23.468437][ C1] kasan_report+0x10f/0x150 [ 23.472936][ C1] ? rcu_cblist_dequeue+0x6c/0xb0 [ 23.477947][ C1] __asan_report_load8_noabort+0x14/0x20 [ 23.483571][ C1] rcu_cblist_dequeue+0x6c/0xb0 [ 23.488408][ C1] rcu_do_batch+0x47d/0xbf0 [ 23.492897][ C1] ? local_bh_enable+0x20/0x20 [ 23.497648][ C1] ? __kasan_check_write+0x14/0x20 [ 23.502745][ C1] ? _raw_spin_lock+0xf0/0xf0 [ 23.507409][ C1] rcu_core+0x4a3/0xef0 [ 23.511547][ C1] ? rcu_cpu_kthread_park+0x90/0x90 [ 23.516726][ C1] ? sched_clock_cpu+0x18/0x3d0 [ 23.521556][ C1] ? __this_cpu_preempt_check+0x13/0x20 [ 23.527084][ C1] ? rcu_softirq_qs+0xd7/0x2f0 [ 23.531828][ C1] ? irqtime_account_irq+0x76/0x390 [ 23.537004][ C1] rcu_core_si+0x9/0x10 [ 23.541143][ C1] handle_softirqs+0x250/0x560 [ 23.545896][ C1] ? ksoftirqd_should_run+0x20/0x20 [ 23.551075][ C1] run_ksoftirqd+0x28/0x40 [ 23.555472][ C1] smpboot_thread_fn+0x446/0x880 [ 23.560395][ C1] kthread+0x3f5/0x4f0 [ 23.564443][ C1] ? cpu_report_death+0x1b0/0x1b0 [ 23.569447][ C1] ? kthread_blkcg+0xd0/0xd0 [ 23.574017][ C1] ret_from_fork+0x1f/0x30 [ 23.578413][ C1] [ 23.581412][ C1] [ 23.583712][ C1] Allocated by task 372: [ 23.587949][ C1] __kasan_kmalloc+0xd4/0x100 [ 23.592609][ C1] __kmalloc+0x13d/0x2c0 [ 23.596835][ C1] l2tp_session_create+0x39/0xb60 [ 23.601841][ C1] pppol2tp_connect+0xbf5/0x1640 [ 23.606759][ C1] __sys_connect+0x3cb/0x450 [ 23.611331][ C1] __x64_sys_connect+0x7a/0x90 [ 23.616076][ C1] x64_sys_call+0x7c/0x9a0 [ 23.620472][ C1] do_syscall_64+0x4c/0xa0 [ 23.624876][ C1] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 23.630747][ C1] [ 23.633047][ C1] Freed by task 312: [ 23.636913][ C1] kasan_set_track+0x4a/0x70 [ 23.641482][ C1] kasan_set_free_info+0x23/0x40 [ 23.646407][ C1] ____kasan_slab_free+0x125/0x160 [ 23.651525][ C1] __kasan_slab_free+0x11/0x20 [ 23.656266][ C1] slab_free_freelist_hook+0xc2/0x190 [ 23.661617][ C1] kfree+0xc4/0x270 [ 23.665404][ C1] l2tp_session_put+0xaf/0x1a0 [ 23.670147][ C1] l2tp_session_delete+0x3a9/0x4a0 [ 23.675236][ C1] l2tp_tunnel_del_work+0x180/0x3d0 [ 23.680414][ C1] process_one_work+0x6c8/0xbb0 [ 23.685255][ C1] worker_thread+0xaa0/0x1250 [ 23.689920][ C1] kthread+0x3f5/0x4f0 [ 23.693969][ C1] ret_from_fork+0x1f/0x30 [ 23.698366][ C1] [ 23.700668][ C1] Last potentially related work creation: [ 23.706361][ C1] kasan_save_stack+0x3a/0x60 [ 23.711016][ C1] __kasan_record_aux_stack+0xd2/0x100 [ 23.716454][ C1] kasan_record_aux_stack_noalloc+0xb/0x10 [ 23.722245][ C1] call_rcu+0x10b/0xf60 [ 23.726382][ C1] pppol2tp_release+0x1e3/0x2b0 [ 23.731212][ C1] sock_close+0xb8/0x200 [ 23.735432][ C1] __fput+0x22b/0x900 [ 23.739393][ C1] ____fput+0x15/0x20 [ 23.743353][ C1] task_work_run+0x127/0x190 [ 23.747921][ C1] exit_to_user_mode_loop+0xd0/0xe0 [ 23.753097][ C1] exit_to_user_mode_prepare+0x87/0xd0 [ 23.758535][ C1] syscall_exit_to_user_mode+0x1a/0x30 [ 23.763975][ C1] do_syscall_64+0x58/0xa0 [ 23.768383][ C1] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 23.774273][ C1] [ 23.776582][ C1] The buggy address belongs to the object at ffff8881103a1000 [ 23.776582][ C1] which belongs to the cache kmalloc-512 of size 512 [ 23.790618][ C1] The buggy address is located 400 bytes inside of [ 23.790618][ C1] 512-byte region [ffff8881103a1000, ffff8881103a1200) [ 23.803881][ C1] The buggy address belongs to the page: [ 23.809507][ C1] page:ffffea000440e800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1103a0 [ 23.819761][ C1] head:ffffea000440e800 order:2 compound_mapcount:0 compound_pincount:0 [ 23.828068][ C1] flags: 0x4000000000010200(slab|head|zone=1) [ 23.834146][ C1] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00 [ 23.842722][ C1] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 [ 23.851277][ C1] page dumped because: kasan: bad access detected [ 23.857664][ C1] page_owner tracks the page as allocated [ 23.863359][ C1] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 108, ts 3765815759, free_ts 0 [ 23.881393][ C1] post_alloc_hook+0x192/0x1b0 [ 23.886141][ C1] prep_new_page+0x1c/0x110 [ 23.890627][ C1] get_page_from_freelist+0x2c3a/0x2cd0 [ 23.896154][ C1] __alloc_pages+0x1a2/0x460 [ 23.900723][ C1] new_slab+0xa0/0x4d0 [ 23.904771][ C1] ___slab_alloc+0x3ac/0x840 [ 23.909342][ C1] __slab_alloc+0x49/0x90 [ 23.913655][ C1] __kmalloc_track_caller+0x169/0x2c0 [ 23.919006][ C1] __alloc_skb+0x210/0x730 [ 23.923403][ C1] alloc_skb_with_frags+0xa8/0x620 [ 23.928497][ C1] sock_alloc_send_pskb+0x87f/0x9a0 [ 23.933676][ C1] unix_dgram_sendmsg+0x6f3/0x19b0 [ 23.938767][ C1] sock_write_iter+0x2a6/0x3a0 [ 23.943510][ C1] vfs_write+0x831/0xfd0 [ 23.947731][ C1] ksys_write+0x14a/0x260 [ 23.952040][ C1] __x64_sys_write+0x7b/0x90 [ 23.956614][ C1] page_owner free stack trace missing [ 23.961956][ C1] [ 23.964258][ C1] Memory state around the buggy address: [ 23.969883][ C1] ffff8881103a1080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.977922][ C1] ffff8881103a1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.985961][ C1] >ffff8881103a1180: fb fb fb fb fb fb fb fb fb fb fb fb f