cess permissive=1 [ 17.198486][ T24] audit: type=1400 audit(1793342795.760:63): avc: denied { siginh } for pid=217 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.86' (ED25519) to the list of known hosts. 2026/10/30 06:46:44 parsed 1 programs 2026/10/30 06:46:44 serving rpc on tcp://41761 [ 26.284655][ T24] audit: type=1400 audit(1793342804.890:64): 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 [ 26.306068][ T24] audit: type=1400 audit(1793342804.890:65): 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 [ 26.325930][ T24] audit: type=1400 audit(1793342804.890:66): 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 [ 27.218665][ T24] audit: type=1400 audit(1793342805.820:67): 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 [ 27.222498][ T293] cgroup: Unknown subsys name 'net' [ 27.241583][ T24] audit: type=1400 audit(1793342805.820:68): 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 [ 27.268868][ T24] audit: type=1400 audit(1793342805.850:69): 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 [ 27.269357][ T293] cgroup: Unknown subsys name 'devices' [ 27.381983][ T293] cgroup: Unknown subsys name 'hugetlb' [ 27.387597][ T293] cgroup: Unknown subsys name 'rlimit' [ 27.507941][ T24] audit: type=1400 audit(1793342806.110:70): 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 [ 27.531136][ T24] audit: type=1400 audit(1793342806.110:71): 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 [ 27.551690][ T24] audit: type=1400 audit(1793342806.110:72): 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 [ 27.572139][ T24] audit: type=1400 audit(1793342806.110:73): 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 [ 27.577583][ T297] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 27.613237][ T293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 28.103032][ T299] request_module fs-gadgetfs succeeded, but still no fs? [ 28.114490][ T299] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 28.594223][ T341] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.601431][ T341] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.608841][ T341] device bridge_slave_0 entered promiscuous mode [ 28.616039][ T341] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.623532][ T341] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.630989][ T341] device bridge_slave_1 entered promiscuous mode [ 28.672926][ T341] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.679976][ T341] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.687333][ T341] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.694392][ T341] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.713012][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.720735][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.728039][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.737713][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.746046][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.753132][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.761759][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.769967][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.777038][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.788591][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.798096][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.811590][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.822870][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.831375][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.838779][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.847527][ T341] device veth0_vlan entered promiscuous mode [ 28.857341][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.866555][ T341] device veth1_macvtap entered promiscuous mode [ 28.875697][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.885897][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/10/30 06:46:47 executed programs: 0 [ 29.213608][ T360] bridge0: port 1(bridge_slave_0) entered blocking state [ 29.220900][ T360] bridge0: port 1(bridge_slave_0) entered disabled state [ 29.228262][ T360] device bridge_slave_0 entered promiscuous mode [ 29.235751][ T360] bridge0: port 2(bridge_slave_1) entered blocking state [ 29.242913][ T360] bridge0: port 2(bridge_slave_1) entered disabled state [ 29.250701][ T360] device bridge_slave_1 entered promiscuous mode [ 29.299030][ T360] bridge0: port 2(bridge_slave_1) entered blocking state [ 29.306129][ T360] bridge0: port 2(bridge_slave_1) entered forwarding state [ 29.313555][ T360] bridge0: port 1(bridge_slave_0) entered blocking state [ 29.320714][ T360] bridge0: port 1(bridge_slave_0) entered forwarding state [ 29.333983][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 29.341335][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 29.359435][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 29.367115][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 29.375686][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 29.384556][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 29.393041][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 29.400066][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 29.419341][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 29.427800][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 29.436194][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 29.443267][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 29.450952][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 29.458975][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 29.467226][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 29.475521][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 29.486788][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 29.495149][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 29.505676][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 29.513783][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 29.522193][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 29.529645][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 29.538031][ T360] device veth0_vlan entered promiscuous mode [ 29.547534][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 29.555705][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 29.565037][ T360] device veth1_macvtap entered promiscuous mode [ 29.573784][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 29.582062][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 29.590498][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 29.604314][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 29.612680][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 29.638230][ T389] ================================================================== [ 29.646529][ T389] BUG: KASAN: use-after-free in rcu_segcblist_enqueue+0x4b/0xa0 [ 29.654346][ T389] Write of size 8 at addr ffff88810fc4cd90 by task syz.2.17/389 [ 29.662227][ T389] [ 29.664568][ T389] CPU: 0 PID: 389 Comm: syz.2.17 Not tainted syzkaller #0 [ 29.671673][ T389] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 [ 29.681760][ T389] Call Trace: [ 29.685168][ T389] __dump_stack+0x21/0x24 [ 29.689498][ T389] dump_stack_lvl+0x1a7/0x208 [ 29.694179][ T389] ? show_regs_print_info+0x18/0x18 [ 29.699385][ T389] ? thaw_kernel_threads+0x220/0x220 [ 29.704668][ T389] print_address_description+0x7f/0x2c0 [ 29.710213][ T389] ? rcu_segcblist_enqueue+0x4b/0xa0 [ 29.715493][ T389] kasan_report+0x100/0x140 [ 29.719994][ T389] ? rcu_segcblist_enqueue+0x4b/0xa0 [ 29.725285][ T389] __asan_report_store8_noabort+0x17/0x20 [ 29.731002][ T389] rcu_segcblist_enqueue+0x4b/0xa0 [ 29.736122][ T389] call_rcu+0x4df/0x1090 [ 29.740382][ T389] ? local_bh_enable+0x1f/0x30 [ 29.745142][ T389] ? lock_sock_nested+0x217/0x2a0 [ 29.750187][ T389] ? rcu_gp_kthread_wake+0x90/0x90 [ 29.755313][ T389] ? __kasan_check_write+0x14/0x20 [ 29.760417][ T389] ? mutex_lock+0x92/0xf0 [ 29.764736][ T389] ? mutex_trylock+0xb0/0xb0 [ 29.769434][ T389] pppol2tp_release+0x1e3/0x2b0 [ 29.774298][ T389] sock_close+0xb8/0x200 [ 29.778533][ T389] ? sock_mmap+0xa0/0xa0 [ 29.782788][ T389] __fput+0x2dc/0x730 [ 29.786790][ T389] ____fput+0x15/0x20 [ 29.790771][ T389] task_work_run+0x127/0x190 [ 29.795369][ T389] exit_to_user_mode_loop+0xcb/0xe0 [ 29.800560][ T389] exit_to_user_mode_prepare+0x76/0xa0 [ 29.806028][ T389] syscall_exit_to_user_mode+0x1d/0x40 [ 29.811499][ T389] do_syscall_64+0x3d/0x40 [ 29.816083][ T389] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 29.821979][ T389] RIP: 0033:0x7f7c20cde559 [ 29.826410][ T389] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 [ 29.846027][ T389] RSP: 002b:00007fff85864868 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 29.854450][ T389] RAX: 0000000000000000 RBX: 00007fff85864950 RCX: 00007f7c20cde559 [ 29.862528][ T389] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 29.870536][ T389] RBP: 00000000000073b1 R08: 0000000000000001 R09: 0000000000000000 [ 29.878507][ T389] R10: 0000001b32720000 R11: 0000000000000246 R12: 0000000000000000 [ 29.886475][ T389] R13: 00007f7c20f64fac R14: 00007f7c20f64fa8 R15: 00007f7c20f64fa0 [ 29.894546][ T389] [ 29.896884][ T389] Allocated by task 389: [ 29.901145][ T389] __kasan_kmalloc+0xd4/0x100 [ 29.905842][ T389] __kmalloc+0x19f/0x330 [ 29.910081][ T389] l2tp_session_create+0x39/0xb60 [ 29.915118][ T389] pppol2tp_connect+0xbf5/0x1640 [ 29.920049][ T389] __sys_connect+0x3ce/0x450 [ 29.924772][ T389] __x64_sys_connect+0x7a/0x90 [ 29.929546][ T389] do_syscall_64+0x31/0x40 [ 29.933956][ T389] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 29.939973][ T389] [ 29.942560][ T389] Freed by task 347: [ 29.946451][ T389] kasan_set_track+0x4a/0x70 [ 29.951050][ T389] kasan_set_free_info+0x23/0x40 [ 29.955985][ T389] ____kasan_slab_free+0x125/0x160 [ 29.961136][ T389] __kasan_slab_free+0x11/0x20 [ 29.965912][ T389] slab_free_freelist_hook+0xc5/0x190 [ 29.971281][ T389] kfree+0xc0/0x270 [ 29.975091][ T389] l2tp_session_put+0xb2/0x1a0 [ 29.979871][ T389] l2tp_session_delete+0x3a9/0x4a0 [ 29.984997][ T389] l2tp_tunnel_del_work+0x180/0x3d0 [ 29.990202][ T389] process_one_work+0x6fd/0xbc0 [ 29.995065][ T389] worker_thread+0xa8e/0x13c0 [ 29.999860][ T389] kthread+0x324/0x3b0 [ 30.003932][ T389] ret_from_fork+0x1f/0x30 [ 30.008338][ T389] [ 30.010664][ T389] Last potentially related work creation: [ 30.016577][ T389] kasan_save_stack+0x3a/0x60 [ 30.021257][ T389] __kasan_record_aux_stack+0xd2/0x100 [ 30.026734][ T389] kasan_record_aux_stack_noalloc+0xb/0x10 [ 30.032535][ T389] call_rcu+0x11a/0x1090 [ 30.036818][ T389] pppol2tp_release+0x1e3/0x2b0 [ 30.041662][ T389] sock_close+0xb8/0x200 [ 30.045896][ T389] __fput+0x2dc/0x730 [ 30.049882][ T389] ____fput+0x15/0x20 [ 30.053995][ T389] task_work_run+0x127/0x190 [ 30.058589][ T389] exit_to_user_mode_loop+0xcb/0xe0 [ 30.063832][ T389] exit_to_user_mode_prepare+0x76/0xa0 [ 30.069318][ T389] syscall_exit_to_user_mode+0x1d/0x40 [ 30.075223][ T389] do_syscall_64+0x3d/0x40 [ 30.079747][ T389] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 30.085633][ T389] [ 30.088068][ T389] The buggy address belongs to the object at ffff88810fc4cc00 [ 30.088068][ T389] which belongs to the cache kmalloc-512 of size 512 [ 30.102319][ T389] The buggy address is located 400 bytes inside of [ 30.102319][ T389] 512-byte region [ffff88810fc4cc00, ffff88810fc4ce00) [ 30.115680][ T389] The buggy address belongs to the page: [ 30.121366][ T389] page:ffffea00043f1300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fc4c [ 30.132087][ T389] head:ffffea00043f1300 order:2 compound_mapcount:0 compound_pincount:0 [ 30.140532][ T389] flags: 0x4000000000010200(slab|head) [ 30.146011][ T389] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 [ 30.154614][ T389] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 30.163208][ T389] page dumped because: kasan: bad access detected [ 30.169641][ T389] page_owner tracks the page as allocated [ 30.175384][ T389] page last allocated via order 2, migratetype Unmovable, gfp_mask 0x152a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 360, ts 29630256787, free_ts 29590448299 [ 30.193734][ T389] prep_new_page+0x176/0x190 [ 30.198341][ T389] get_page_from_freelist+0x225f/0x23f0 [ 30.203912][ T389] __alloc_pages_nodemask+0x29a/0x640 [ 30.209287][ T389] new_slab+0x84/0x3f0 [ 30.213395][ T389] ___slab_alloc+0x2f8/0x4c0 [ 30.217987][ T389] __slab_alloc+0x63/0xa0 [ 30.222346][ T389] __kmalloc+0x1f9/0x330 [ 30.226625][ T389] ___neigh_create+0x6ec/0x1a70 [ 30.231489][ T389] __neigh_create+0x31/0x40 [ 30.236031][ T389] ip6_finish_output2+0x8fe/0x1540 [ 30.241156][ T389] __ip6_finish_output+0x5fd/0x790 [ 30.246275][ T389] ip6_finish_output+0x33/0x1e0 [ 30.251155][ T389] ip6_output+0x1fa/0x420 [ 30.255504][ T389] mld_sendpack+0x61e/0xb00 [ 30.260236][ T389] mld_ifc_timer_expire+0x862/0xc60 [ 30.265473][ T389] call_timer_fn+0x38/0x290 [ 30.269988][ T389] page last free stack trace: [ 30.274681][ T389] __free_pages_ok+0x80b/0x830 [ 30.279463][ T389] __free_pages+0xd8/0x390 [ 30.283895][ T389] __free_slab+0xcf/0x190 [ 30.288318][ T389] unfreeze_partials+0x150/0x180 [ 30.293291][ T389] put_cpu_partial+0xc1/0x180 [ 30.298225][ T389] __slab_free+0x2c9/0x3a0 [ 30.302655][ T389] ___cache_free+0x10e/0x130 [ 30.307256][ T389] qlink_free+0x50/0x90 [ 30.311455][ T389] qlist_free_all+0x5f/0xb0 [ 30.315974][ T389] kasan_quarantine_reduce+0x14a/0x160 [ 30.321550][ T389] __kasan_slab_alloc+0x2f/0xe0 [ 30.326414][ T389] slab_post_alloc_hook+0x5d/0x2f0 [ 30.331538][ T389] kmem_cache_alloc_trace+0x155/0x2e0 [ 30.336950][ T389] syslog_print+0x127/0x720 [ 30.341466][ T389] do_syslog+0x94c/0x9a0 [ 30.345712][ T389] __x64_sys_syslog+0x7c/0x90 [ 30.350387][ T389] [ 30.352723][ T389] Memory state around the buggy address: [ 30.358452][ T389] ffff88810fc4cc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.366560][ T389] ffff88810fc4cd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.374786][ T389] >ffff88810fc4cd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.382853][ T389] ^ [ 30.387483][ T389] ffff88810fc4ce00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.395651][ T389] ffff88810fc4ce80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.403829][ T389] ================================================================== [ 30.411981][ T389] Disabling lock debugging due to kernel taint