Warning: Permanently added '10.128.0.191' (ED25519) to the list of known hosts. 2026/07/21 13:08:45 parsed 1 programs 2026/07/21 13:08:45 serving rpc on tcp://33735 [ 21.733179][ T24] audit: type=1400 audit(1784639325.520:64): 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 [ 21.754016][ T24] audit: type=1400 audit(1784639325.520:65): 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 [ 21.773723][ T24] audit: type=1400 audit(1784639325.520:66): 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 [ 22.363943][ T24] audit: type=1400 audit(1784639326.150:67): 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 [ 22.364999][ T293] cgroup: Unknown subsys name 'net' [ 22.386583][ T24] audit: type=1400 audit(1784639326.150:68): 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 [ 22.414083][ T24] audit: type=1400 audit(1784639326.180:69): 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 [ 22.414241][ T293] cgroup: Unknown subsys name 'devices' [ 22.523846][ T293] cgroup: Unknown subsys name 'hugetlb' [ 22.529515][ T293] cgroup: Unknown subsys name 'rlimit' [ 22.643066][ T24] audit: type=1400 audit(1784639326.430:70): 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 [ 22.666323][ T24] audit: type=1400 audit(1784639326.430:71): 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 [ 22.671264][ T297] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 22.687377][ T24] audit: type=1400 audit(1784639326.430:72): 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 [ 22.716173][ T24] audit: type=1400 audit(1784639326.430:73): 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 [ 22.749218][ T293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 23.162246][ T300] request_module fs-gadgetfs succeeded, but still no fs? [ 23.172831][ T300] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 23.663588][ T347] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.670658][ T347] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.678885][ T347] device bridge_slave_0 entered promiscuous mode [ 23.685821][ T347] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.692901][ T347] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.700128][ T347] device bridge_slave_1 entered promiscuous mode [ 23.731127][ T347] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.738187][ T347] bridge0: port 2(bridge_slave_1) entered forwarding state [ 23.745461][ T347] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.752490][ T347] bridge0: port 1(bridge_slave_0) entered forwarding state [ 23.769573][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.777103][ T49] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.784391][ T49] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.793505][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 23.801659][ T49] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.808700][ T49] bridge0: port 1(bridge_slave_0) entered forwarding state [ 23.816892][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 23.825365][ T49] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.832403][ T49] bridge0: port 2(bridge_slave_1) entered forwarding state [ 23.844026][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 23.853658][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 23.866417][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 23.877163][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 23.885469][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 23.893118][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 23.901521][ T347] device veth0_vlan entered promiscuous mode [ 23.910715][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 23.919604][ T347] device veth1_macvtap entered promiscuous mode [ 23.928557][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 23.938732][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/07/21 13:08:47 executed programs: 0 [ 24.236583][ T365] bridge0: port 1(bridge_slave_0) entered blocking state [ 24.243744][ T365] bridge0: port 1(bridge_slave_0) entered disabled state [ 24.251025][ T365] device bridge_slave_0 entered promiscuous mode [ 24.258115][ T365] bridge0: port 2(bridge_slave_1) entered blocking state [ 24.265459][ T365] bridge0: port 2(bridge_slave_1) entered disabled state [ 24.272930][ T365] device bridge_slave_1 entered promiscuous mode [ 24.308952][ T365] bridge0: port 2(bridge_slave_1) entered blocking state [ 24.316122][ T365] bridge0: port 2(bridge_slave_1) entered forwarding state [ 24.323376][ T365] bridge0: port 1(bridge_slave_0) entered blocking state [ 24.330476][ T365] bridge0: port 1(bridge_slave_0) entered forwarding state [ 24.346078][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 24.354023][ T352] bridge0: port 1(bridge_slave_0) entered disabled state [ 24.361152][ T352] bridge0: port 2(bridge_slave_1) entered disabled state [ 24.374448][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 24.382654][ T352] bridge0: port 1(bridge_slave_0) entered blocking state [ 24.389681][ T352] bridge0: port 1(bridge_slave_0) entered forwarding state [ 24.398697][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 24.407221][ T352] bridge0: port 2(bridge_slave_1) entered blocking state [ 24.415059][ T352] bridge0: port 2(bridge_slave_1) entered forwarding state [ 24.430993][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 24.440092][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 24.452918][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 24.469876][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 24.478075][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 24.485618][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 24.493952][ T365] device veth0_vlan entered promiscuous mode [ 24.506580][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 24.515706][ T365] device veth1_macvtap entered promiscuous mode [ 24.524746][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 24.535125][ T352] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 24.561758][ T369] ================================================================== [ 24.569855][ T369] BUG: KASAN: use-after-free in rcu_segcblist_enqueue+0x4b/0xa0 [ 24.577595][ T369] Write of size 8 at addr ffff88811127a190 by task syz.2.17/369 [ 24.585322][ T369] [ 24.587640][ T369] CPU: 0 PID: 369 Comm: syz.2.17 Not tainted syzkaller #0 [ 24.594725][ T369] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 24.605722][ T369] Call Trace: [ 24.609004][ T369] __dump_stack+0x21/0x24 [ 24.613318][ T369] dump_stack_lvl+0x1a7/0x208 [ 24.618005][ T369] ? show_regs_print_info+0x18/0x18 [ 24.623187][ T369] ? thaw_kernel_threads+0x220/0x220 [ 24.628453][ T369] print_address_description+0x7f/0x2c0 [ 24.634103][ T369] ? rcu_segcblist_enqueue+0x4b/0xa0 [ 24.639369][ T369] kasan_report+0x100/0x140 [ 24.643862][ T369] ? rcu_segcblist_enqueue+0x4b/0xa0 [ 24.649127][ T369] __asan_report_store8_noabort+0x17/0x20 [ 24.654821][ T369] rcu_segcblist_enqueue+0x4b/0xa0 [ 24.659910][ T369] call_rcu+0x4df/0x1090 [ 24.664219][ T369] ? local_bh_enable+0x1f/0x30 [ 24.668961][ T369] ? lock_sock_nested+0x217/0x2a0 [ 24.673973][ T369] ? rcu_gp_kthread_wake+0x90/0x90 [ 24.679086][ T369] ? __kasan_check_write+0x14/0x20 [ 24.684287][ T369] ? mutex_lock+0x92/0xf0 [ 24.688598][ T369] ? mutex_trylock+0xb0/0xb0 [ 24.693164][ T369] pppol2tp_release+0x1e3/0x2b0 [ 24.698000][ T369] sock_close+0xb8/0x200 [ 24.702218][ T369] ? sock_mmap+0xa0/0xa0 [ 24.706503][ T369] __fput+0x2dc/0x730 [ 24.710475][ T369] ____fput+0x15/0x20 [ 24.714563][ T369] task_work_run+0x127/0x190 [ 24.719144][ T369] exit_to_user_mode_loop+0xcb/0xe0 [ 24.724325][ T369] exit_to_user_mode_prepare+0x76/0xa0 [ 24.729766][ T369] syscall_exit_to_user_mode+0x1d/0x40 [ 24.735199][ T369] do_syscall_64+0x3d/0x40 [ 24.739618][ T369] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.745486][ T369] RIP: 0033:0x7fefa797fe99 [ 24.749887][ T369] 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 [ 24.769505][ T369] RSP: 002b:00007ffc7cae8b38 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 24.778038][ T369] RAX: 0000000000000000 RBX: 00007ffc7cae8c20 RCX: 00007fefa797fe99 [ 24.785999][ T369] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 24.793957][ T369] RBP: 0000000000005fda R08: 0000000000000001 R09: 0000000000000000 [ 24.801908][ T369] R10: 0000001b32c20000 R11: 0000000000000246 R12: 0000000000000000 [ 24.809863][ T369] R13: 00007fefa7c07fac R14: 00007fefa7c07fa8 R15: 00007fefa7c07fa0 [ 24.818460][ T369] [ 24.821410][ T369] Allocated by task 369: [ 24.825649][ T369] __kasan_kmalloc+0xd4/0x100 [ 24.830311][ T369] __kmalloc+0x19f/0x330 [ 24.834581][ T369] l2tp_session_create+0x39/0xb60 [ 24.839606][ T369] pppol2tp_connect+0xbf5/0x1640 [ 24.844550][ T369] __sys_connect+0x3ce/0x450 [ 24.849156][ T369] __x64_sys_connect+0x7a/0x90 [ 24.853912][ T369] do_syscall_64+0x31/0x40 [ 24.858329][ T369] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.864328][ T369] [ 24.866647][ T369] Freed by task 49: [ 24.870451][ T369] kasan_set_track+0x4a/0x70 [ 24.875027][ T369] kasan_set_free_info+0x23/0x40 [ 24.880072][ T369] ____kasan_slab_free+0x125/0x160 [ 24.885189][ T369] __kasan_slab_free+0x11/0x20 [ 24.889942][ T369] slab_free_freelist_hook+0xc5/0x190 [ 24.895300][ T369] kfree+0xc0/0x270 [ 24.899092][ T369] l2tp_session_put+0xb2/0x1a0 [ 24.903838][ T369] l2tp_session_delete+0x3a9/0x4a0 [ 24.908926][ T369] l2tp_tunnel_del_work+0x180/0x3d0 [ 24.914114][ T369] process_one_work+0x6fd/0xbc0 [ 24.918957][ T369] worker_thread+0xa8e/0x13c0 [ 24.923695][ T369] kthread+0x324/0x3b0 [ 24.928092][ T369] ret_from_fork+0x1f/0x30 [ 24.932478][ T369] [ 24.934784][ T369] Last potentially related work creation: [ 24.940479][ T369] kasan_save_stack+0x3a/0x60 [ 24.945219][ T369] __kasan_record_aux_stack+0xd2/0x100 [ 24.950651][ T369] kasan_record_aux_stack_noalloc+0xb/0x10 [ 24.956435][ T369] call_rcu+0x11a/0x1090 [ 24.960656][ T369] pppol2tp_release+0x1e3/0x2b0 [ 24.965601][ T369] sock_close+0xb8/0x200 [ 24.969844][ T369] __fput+0x2dc/0x730 [ 24.973807][ T369] ____fput+0x15/0x20 [ 24.977765][ T369] task_work_run+0x127/0x190 [ 24.982351][ T369] exit_to_user_mode_loop+0xcb/0xe0 [ 24.987551][ T369] exit_to_user_mode_prepare+0x76/0xa0 [ 24.993018][ T369] syscall_exit_to_user_mode+0x1d/0x40 [ 24.998456][ T369] do_syscall_64+0x3d/0x40 [ 25.002869][ T369] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 25.008729][ T369] [ 25.011038][ T369] The buggy address belongs to the object at ffff88811127a000 [ 25.011038][ T369] which belongs to the cache kmalloc-512 of size 512 [ 25.025069][ T369] The buggy address is located 400 bytes inside of [ 25.025069][ T369] 512-byte region [ffff88811127a000, ffff88811127a200) [ 25.038564][ T369] The buggy address belongs to the page: [ 25.044219][ T369] page:ffffea0004449e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x111278 [ 25.054437][ T369] head:ffffea0004449e00 order:2 compound_mapcount:0 compound_pincount:0 [ 25.062745][ T369] flags: 0x4000000000010200(slab|head) [ 25.068184][ T369] raw: 4000000000010200 ffffea00043e9500 0000000500000005 ffff888100043080 [ 25.076755][ T369] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 25.086053][ T369] page dumped because: kasan: bad access detected [ 25.092544][ T369] page_owner tracks the page as allocated [ 25.099800][ T369] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 98, ts 4140207263, free_ts 0 [ 25.118137][ T369] prep_new_page+0x176/0x190 [ 25.122709][ T369] get_page_from_freelist+0x225f/0x23f0 [ 25.128229][ T369] __alloc_pages_nodemask+0x29a/0x640 [ 25.133578][ T369] new_slab+0x84/0x3f0 [ 25.137668][ T369] ___slab_alloc+0x2f8/0x4c0 [ 25.142230][ T369] __slab_alloc+0x63/0xa0 [ 25.146534][ T369] __kmalloc_track_caller+0x1e4/0x310 [ 25.151879][ T369] __alloc_skb+0xdc/0x520 [ 25.156222][ T369] alloc_skb_with_frags+0xa3/0x560 [ 25.161324][ T369] sock_alloc_send_pskb+0x87f/0x9a0 [ 25.166517][ T369] unix_dgram_sendmsg+0x6f3/0x18f0 [ 25.171612][ T369] sock_write_iter+0x2a6/0x3a0 [ 25.176438][ T369] vfs_write+0x770/0xd70 [ 25.180659][ T369] ksys_write+0x14a/0x260 [ 25.185663][ T369] __x64_sys_write+0x7b/0x90 [ 25.190249][ T369] do_syscall_64+0x31/0x40 [ 25.194653][ T369] page_owner free stack trace missing [ 25.199993][ T369] [ 25.202299][ T369] Memory state around the buggy address: [ 25.207999][ T369] ffff88811127a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.216041][ T369] ffff88811127a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.224096][ T369] >ffff88811127a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.232131][ T369] ^ [ 25.236695][ T369] ffff88811127a200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.244740][ T369] ffff88811127a280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.252772][ T369] ================================================================== [ 25.260893][ T369] Disabling lock debugging due to kernel taint