cess permissive=1 [ 14.124058][ T28] audit: type=1400 audit(1785473099.389:63): 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 [ 15.938953][ T232] sshd-session (232) used greatest stack depth: 22760 bytes left Warning: Permanently added '10.128.1.55' (ED25519) to the list of known hosts. 2026/07/31 04:45:09 parsed 1 programs 2026/07/31 04:45:09 serving rpc on tcp://43021 [ 23.778606][ T28] audit: type=1400 audit(1785473109.059:64): 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 [ 23.800185][ T28] audit: type=1400 audit(1785473109.059:65): 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 [ 24.618080][ T28] audit: type=1400 audit(1785473109.899:66): avc: denied { mounton } for pid=301 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 [ 24.619063][ T301] cgroup: Unknown subsys name 'net' [ 24.641063][ T28] audit: type=1400 audit(1785473109.899:67): avc: denied { mount } for pid=301 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 [ 24.668867][ T28] audit: type=1400 audit(1785473109.939:68): avc: denied { unmount } for pid=301 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 24.669062][ T301] cgroup: Unknown subsys name 'devices' [ 24.816010][ T301] cgroup: Unknown subsys name 'hugetlb' [ 24.821674][ T301] cgroup: Unknown subsys name 'rlimit' [ 24.930509][ T28] audit: type=1400 audit(1785473110.209:69): avc: denied { setattr } for pid=301 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 [ 24.953790][ T28] audit: type=1400 audit(1785473110.209:70): avc: denied { create } for pid=301 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 24.974223][ T28] audit: type=1400 audit(1785473110.209:71): avc: denied { write } for pid=301 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 24.983121][ T305] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 24.994514][ T28] audit: type=1400 audit(1785473110.209:72): avc: denied { read } for pid=301 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 [ 25.023824][ T28] audit: type=1400 audit(1785473110.209:73): avc: denied { mounton } for pid=301 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 [ 25.057332][ T301] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 25.775010][ T309] request_module fs-gadgetfs succeeded, but still no fs? [ 26.390329][ T356] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.397467][ T356] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.405159][ T356] device bridge_slave_0 entered promiscuous mode [ 26.412224][ T356] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.419443][ T356] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.427229][ T356] device bridge_slave_1 entered promiscuous mode [ 26.467980][ T356] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.475226][ T356] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.482474][ T356] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.489570][ T356] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.508939][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.516887][ T43] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.524584][ T43] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.535077][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.545127][ T43] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.552526][ T43] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.561450][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.570112][ T43] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.577974][ T43] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.590416][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.599789][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.613916][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.625485][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.633792][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.641468][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.649563][ T356] device veth0_vlan entered promiscuous mode [ 26.660063][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.669432][ T356] device veth1_macvtap entered promiscuous mode [ 26.679402][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.689697][ T43] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.727916][ T356] syz-executor (356) used greatest stack depth: 22240 bytes left 2026/07/31 04:45:12 executed programs: 0 [ 27.001960][ T372] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.009183][ T372] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.017258][ T372] device bridge_slave_0 entered promiscuous mode [ 27.024483][ T372] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.031521][ T372] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.039117][ T372] device bridge_slave_1 entered promiscuous mode [ 27.092756][ T372] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.099867][ T372] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.107197][ T372] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.114601][ T372] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.132124][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.139750][ T335] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.147413][ T335] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.163645][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 27.172052][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 27.180703][ T335] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.187880][ T335] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.197405][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 27.206063][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.214963][ T335] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.222090][ T335] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.237471][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 27.245757][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.259869][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 27.268737][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.282665][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 27.291324][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.302261][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 27.311063][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.319773][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.327566][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.336328][ T372] device veth0_vlan entered promiscuous mode [ 27.349049][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 27.357416][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.367677][ T372] device veth1_macvtap entered promiscuous mode [ 27.378811][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 27.389045][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 27.397826][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.407393][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 27.415808][ T335] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.516324][ T379] ================================================================== [ 27.524702][ T379] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.532814][ T379] Read of size 4 at addr ffff88812f1e3c00 by task syz.2.17/379 [ 27.540386][ T379] [ 27.542883][ T379] CPU: 1 PID: 379 Comm: syz.2.17 Not tainted syzkaller #0 [ 27.550081][ T379] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 27.560309][ T379] Call Trace: [ 27.563675][ T379] [ 27.566705][ T379] __dump_stack+0x21/0x24 [ 27.571151][ T379] dump_stack_lvl+0x110/0x170 [ 27.575831][ T379] ? __cfi_dump_stack_lvl+0x8/0x8 [ 27.581551][ T379] ? _raw_spin_lock_bh+0x94/0xf0 [ 27.586501][ T379] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.592266][ T379] print_address_description+0x71/0x200 [ 27.597826][ T379] print_report+0x4a/0x60 [ 27.602334][ T379] kasan_report+0x122/0x150 [ 27.606858][ T379] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.612704][ T379] __asan_report_load4_noabort+0x14/0x20 [ 27.618340][ T379] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.623886][ T379] pppol2tp_release+0x150/0x2b0 [ 27.628737][ T379] sock_close+0xc9/0x220 [ 27.632996][ T379] ? __cfi_sock_close+0x10/0x10 [ 27.637851][ T379] __fput+0x1fd/0x8f0 [ 27.641840][ T379] ____fput+0x15/0x20 [ 27.645837][ T379] task_work_run+0x1e1/0x250 [ 27.650474][ T379] ? __cfi_task_work_run+0x10/0x10 [ 27.655619][ T379] ? free_nsproxy+0x21f/0x270 [ 27.660439][ T379] do_exit+0xaf2/0x2850 [ 27.664634][ T379] ? __cfi_do_exit+0x10/0x10 [ 27.669283][ T379] ? __mmdrop+0x31b/0x600 [ 27.674209][ T379] ? __kasan_check_write+0x14/0x20 [ 27.680278][ T379] ? _raw_spin_lock_irq+0x95/0xf0 [ 27.685990][ T379] ? __cfi__raw_spin_lock_irq+0x10/0x10 [ 27.692000][ T379] do_group_exit+0x21b/0x2e0 [ 27.696883][ T379] ? __kasan_check_write+0x14/0x20 [ 27.702023][ T379] ? recalc_sigpending+0x180/0x1c0 [ 27.707282][ T379] get_signal+0x167c/0x1700 [ 27.712107][ T379] ? __cfi_get_signal+0x10/0x10 [ 27.717133][ T379] ? usleep_range_state+0x130/0x130 [ 27.722814][ T379] arch_do_signal_or_restart+0xd1/0x11c0 [ 27.728667][ T379] ? hrtimer_nanosleep+0x18f/0x340 [ 27.733845][ T379] ? __cfi_hrtimer_nanosleep+0x10/0x10 [ 27.739521][ T379] ? __cfi_hrtimer_wakeup+0x10/0x10 [ 27.744811][ T379] ? get_timespec64+0x116/0x1b0 [ 27.749660][ T379] ? __cfi_arch_do_signal_or_restart+0x10/0x10 [ 27.755922][ T379] ? __x64_sys_clock_nanosleep+0xb0/0xb0 [ 27.761711][ T379] ? do_user_addr_fault+0x9a5/0x1030 [ 27.767001][ T379] exit_to_user_mode_loop+0x7a/0xb0 [ 27.772202][ T379] exit_to_user_mode_prepare+0x87/0xd0 [ 27.777670][ T379] syscall_exit_to_user_mode+0x1a/0x30 [ 27.783287][ T379] do_syscall_64+0x58/0xa0 [ 27.787705][ T379] ? clear_bhb_loop+0x30/0x80 [ 27.792475][ T379] ? clear_bhb_loop+0x30/0x80 [ 27.797189][ T379] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 27.803104][ T379] RIP: 0033:0x7fbef535e84e [ 27.807698][ T379] Code: Unable to access opcode bytes at 0x7fbef535e824. [ 27.814803][ T379] RSP: 002b:00007fbef6336e78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6 [ 27.823224][ T379] RAX: fffffffffffffdfc RBX: 00007fbef63376c0 RCX: 00007fbef535e84e [ 27.831211][ T379] RDX: 00007fbef6336ed0 RSI: 0000000000000000 RDI: 0000000000000000 [ 27.839201][ T379] RBP: 00007fbef543500c R08: 0000000000000000 R09: 0000000000000000 [ 27.847175][ T379] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.855234][ T379] R13: 00007fbef5626038 R14: 00007fbef5625fa0 R15: 00007fff3a9c9e48 [ 27.863294][ T379] [ 27.866309][ T379] [ 27.868628][ T379] Allocated by task 378: [ 27.872859][ T379] kasan_set_track+0x4b/0x70 [ 27.877500][ T379] kasan_save_alloc_info+0x1f/0x30 [ 27.882608][ T379] __kasan_kmalloc+0x95/0xb0 [ 27.887199][ T379] __kmalloc+0xb4/0x1e0 [ 27.891364][ T379] l2tp_session_create+0x38/0xbd0 [ 27.896394][ T379] pppol2tp_connect+0xbf5/0x1640 [ 27.901340][ T379] __sys_connect+0x3da/0x460 [ 27.905927][ T379] __x64_sys_connect+0x7a/0x90 [ 27.910692][ T379] x64_sys_call+0x88d/0x9a0 [ 27.915229][ T379] do_syscall_64+0x4c/0xa0 [ 27.919691][ T379] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 27.925597][ T379] [ 27.927934][ T379] Freed by task 43: [ 27.931737][ T379] kasan_set_track+0x4b/0x70 [ 27.936340][ T379] kasan_save_free_info+0x2b/0x40 [ 27.941367][ T379] ____kasan_slab_free+0x132/0x180 [ 27.946482][ T379] __kasan_slab_free+0x11/0x20 [ 27.951250][ T379] slab_free_freelist_hook+0xc2/0x190 [ 27.956621][ T379] __kmem_cache_free+0xb7/0x1b0 [ 27.961475][ T379] kfree+0x6f/0xf0 [ 27.965213][ T379] l2tp_session_put+0xaf/0x1a0 [ 27.970066][ T379] l2tp_session_delete+0x3df/0x4d0 [ 27.975184][ T379] l2tp_tunnel_del_work+0x199/0x410 [ 27.980406][ T379] process_one_work+0x717/0xc30 [ 27.985283][ T379] worker_thread+0xa4d/0x11d0 [ 27.990273][ T379] kthread+0x281/0x320 [ 27.994539][ T379] ret_from_fork+0x1f/0x30 [ 27.998974][ T379] [ 28.001297][ T379] The buggy address belongs to the object at ffff88812f1e3c00 [ 28.001297][ T379] which belongs to the cache kmalloc-512 of size 512 [ 28.015876][ T379] The buggy address is located 0 bytes inside of [ 28.015876][ T379] 512-byte region [ffff88812f1e3c00, ffff88812f1e3e00) [ 28.029191][ T379] [ 28.031629][ T379] The buggy address belongs to the physical page: [ 28.038564][ T379] page:ffffea0004bc7800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12f1e0 [ 28.049506][ T379] head:ffffea0004bc7800 order:2 compound_mapcount:0 compound_pincount:0 [ 28.057931][ T379] flags: 0x4000000000010200(slab|head|zone=1) [ 28.064021][ T379] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00 [ 28.072781][ T379] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 28.082041][ T379] page dumped because: kasan: bad access detected [ 28.088542][ T379] page_owner tracks the page as allocated [ 28.094267][ T379] 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 372, tgid 372 (syz-executor), ts 27429500888, free_ts 26855257208 [ 28.116855][ T379] post_alloc_hook+0x1f5/0x210 [ 28.121626][ T379] prep_new_page+0x1c/0x110 [ 28.126231][ T379] get_page_from_freelist+0x2ca9/0x2d20 [ 28.131777][ T379] __alloc_pages+0x1fa/0x610 [ 28.136371][ T379] alloc_slab_page+0x6e/0xf0 [ 28.140965][ T379] new_slab+0x98/0x3e0 [ 28.145030][ T379] ___slab_alloc+0x70f/0xb70 [ 28.149709][ T379] __slab_alloc+0x5e/0xa0 [ 28.154036][ T379] __kmem_cache_alloc_node+0x204/0x2d0 [ 28.159495][ T379] __kmalloc_node_track_caller+0xa1/0x1e0 [ 28.165295][ T379] __alloc_skb+0x226/0x4a0 [ 28.169712][ T379] netlink_sendmsg+0x635/0xbd0 [ 28.174506][ T379] __sys_sendto+0x4ac/0x660 [ 28.179616][ T379] __x64_sys_sendto+0xe5/0x100 [ 28.184646][ T379] x64_sys_call+0x83/0x9a0 [ 28.189316][ T379] do_syscall_64+0x4c/0xa0 [ 28.193948][ T379] page last free stack trace: [ 28.198714][ T379] free_unref_page_prepare+0x80c/0x820 [ 28.204730][ T379] free_unref_page+0x93/0x530 [ 28.209694][ T379] __free_pages+0x67/0x100 [ 28.214537][ T379] free_pages+0x82/0x90 [ 28.219251][ T379] kasan_depopulate_vmalloc_pte+0x6b/0x90 [ 28.225201][ T379] __apply_to_page_range+0x8db/0xc80 [ 28.231411][ T379] apply_to_existing_page_range+0x38/0x50 [ 28.237362][ T379] kasan_release_vmalloc+0x97/0xb0 [ 28.243052][ T379] __purge_vmap_area_lazy+0xf09/0x1870 [ 28.249153][ T379] drain_vmap_area_work+0x3e/0xd0 [ 28.254296][ T379] process_one_work+0x717/0xc30 [ 28.259213][ T379] worker_thread+0xa4d/0x11d0 [ 28.264347][ T379] kthread+0x281/0x320 [ 28.268453][ T379] ret_from_fork+0x1f/0x30 [ 28.273061][ T379] [ 28.275404][ T379] Memory state around the buggy address: [ 28.281555][ T379] ffff88812f1e3b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.289924][ T379] ffff88812f1e3b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.298528][ T379] >ffff88812f1e3c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.306670][ T379] ^ [ 28.310733][ T379] ffff88812f1e3c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.318881][ T379] ffff88812f1e3d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.327382][ T379] ================================================================== [ 28.345772][ T379] Disabling lock debugging due to kernel taint [ 28.352295][ T379] ------------[ cut here ]------------ [ 28.358384][ T379] WARNING: CPU: 1 PID: 379 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 [ 28.368531][ T37