Warning: Permanently added '10.128.0.230' (ED25519) to the list of known hosts. 2026/11/03 21:49:46 parsed 1 programs 2026/11/03 21:49:46 serving rpc on tcp://45171 [ 20.639198][ T24] audit: type=1400 audit(1793742586.680:64): 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 [ 20.660175][ T24] audit: type=1400 audit(1793742586.680:65): 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 [ 20.679895][ T24] audit: type=1400 audit(1793742586.680:66): 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 [ 21.259879][ T24] audit: type=1400 audit(1793742587.300:67): 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 [ 21.260887][ T293] cgroup: Unknown subsys name 'net' [ 21.282540][ T24] audit: type=1400 audit(1793742587.300:68): 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 [ 21.309890][ T24] audit: type=1400 audit(1793742587.330:69): 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 [ 21.310069][ T293] cgroup: Unknown subsys name 'devices' [ 21.424163][ T293] cgroup: Unknown subsys name 'hugetlb' [ 21.429773][ T293] cgroup: Unknown subsys name 'rlimit' [ 21.572081][ T24] audit: type=1400 audit(1793742587.610:70): 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 [ 21.595259][ T24] audit: type=1400 audit(1793742587.610:71): 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 [ 21.599776][ T297] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 21.615868][ T24] audit: type=1400 audit(1793742587.610:72): 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 [ 21.644482][ T24] audit: type=1400 audit(1793742587.610:73): 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 Setting up swapspace version 1, size = 127995904 bytes [ 21.727010][ T293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 22.084510][ T299] request_module fs-gadgetfs succeeded, but still no fs? [ 22.095007][ T299] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 22.166703][ T304] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.173907][ T304] bridge0: port 1(bridge_slave_0) entered disabled state [ 22.181192][ T304] device bridge_slave_0 entered promiscuous mode [ 22.188169][ T304] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.195245][ T304] bridge0: port 2(bridge_slave_1) entered disabled state [ 22.202471][ T304] device bridge_slave_1 entered promiscuous mode [ 22.233702][ T304] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.240729][ T304] bridge0: port 2(bridge_slave_1) entered forwarding state [ 22.247999][ T304] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.255022][ T304] bridge0: port 1(bridge_slave_0) entered forwarding state [ 22.270630][ T305] bridge0: port 1(bridge_slave_0) entered disabled state [ 22.277889][ T305] bridge0: port 2(bridge_slave_1) entered disabled state [ 22.285203][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 22.292557][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 22.301678][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 22.309888][ T305] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.316916][ T305] bridge0: port 1(bridge_slave_0) entered forwarding state [ 22.325312][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 22.333477][ T305] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.340514][ T305] bridge0: port 2(bridge_slave_1) entered forwarding state [ 22.351994][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 22.360815][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 22.374055][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 22.384504][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 22.392430][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 22.399977][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 22.409101][ T304] device veth0_vlan entered promiscuous mode [ 22.418165][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 22.427064][ T304] device veth1_macvtap entered promiscuous mode [ 22.435621][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 22.445993][ T305] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/11/03 21:49:49 executed programs: 0 [ 23.110536][ T363] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.117892][ T363] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.125375][ T363] device bridge_slave_0 entered promiscuous mode [ 23.134015][ T363] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.141026][ T363] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.148377][ T363] device bridge_slave_1 entered promiscuous mode [ 23.165784][ T9] device bridge_slave_1 left promiscuous mode [ 23.171882][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.179416][ T9] device bridge_slave_0 left promiscuous mode [ 23.185616][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.193339][ T9] device veth1_macvtap left promiscuous mode [ 23.199316][ T9] device veth0_vlan left promiscuous mode [ 23.250343][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.258075][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.267112][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 23.275683][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 23.283833][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.290861][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 23.298717][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 23.306908][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 23.315288][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 23.323580][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.330594][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 23.341032][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 23.349861][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 23.361908][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 23.372187][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 23.380222][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 23.387938][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 23.396246][ T363] device veth0_vlan entered promiscuous mode [ 23.407858][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 23.416562][ T363] device veth1_macvtap entered promiscuous mode [ 23.425835][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 23.434144][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 23.448104][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 23.456516][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 23.473402][ T381] ================================================================== [ 23.481482][ T381] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 23.489517][ T381] Read of size 4 at addr ffff88810f37e800 by task syz.2.17/381 [ 23.497027][ T381] [ 23.499342][ T381] CPU: 1 PID: 381 Comm: syz.2.17 Not tainted syzkaller #0 [ 23.506419][ T381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 [ 23.516455][ T381] Call Trace: [ 23.519739][ T381] __dump_stack+0x21/0x24 [ 23.524042][ T381] dump_stack_lvl+0x1a7/0x208 [ 23.528691][ T381] ? show_regs_print_info+0x18/0x18 [ 23.533882][ T381] ? thaw_kernel_threads+0x220/0x220 [ 23.539139][ T381] print_address_description+0x7f/0x2c0 [ 23.544665][ T381] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 23.550356][ T381] kasan_report+0x100/0x140 [ 23.554848][ T381] ? __kasan_check_write+0x14/0x20 [ 23.559930][ T381] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 23.565650][ T381] __asan_report_load4_noabort+0x14/0x20 [ 23.571253][ T381] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 23.576768][ T381] pppol2tp_release+0x150/0x2b0 [ 23.581593][ T381] sock_close+0xb8/0x200 [ 23.585822][ T381] ? sock_mmap+0xa0/0xa0 [ 23.590048][ T381] __fput+0x2dc/0x730 [ 23.594000][ T381] ____fput+0x15/0x20 [ 23.597955][ T381] task_work_run+0x127/0x190 [ 23.602515][ T381] exit_to_user_mode_loop+0xcb/0xe0 [ 23.607682][ T381] exit_to_user_mode_prepare+0x76/0xa0 [ 23.613114][ T381] syscall_exit_to_user_mode+0x1d/0x40 [ 23.618551][ T381] do_syscall_64+0x3d/0x40 [ 23.622942][ T381] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 23.628806][ T381] RIP: 0033:0x7f86e04a7b19 [ 23.633192][ T381] 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 [ 23.652774][ T381] RSP: 002b:00007ffcd5d8f2c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 23.661178][ T381] RAX: 0000000000000000 RBX: 00007ffcd5d8f3b0 RCX: 00007f86e04a7b19 [ 23.669124][ T381] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 23.677085][ T381] RBP: 0000000000005b99 R08: 0000000000000001 R09: 0000000000000000 [ 23.685031][ T381] R10: 0000001b32a20000 R11: 0000000000000246 R12: 00007ffcd5d8f3f0 [ 23.692988][ T381] R13: 00007f86e072dfac R14: 0000000000005bcc R15: 00007f86e072dfa0 [ 23.700931][ T381] [ 23.703236][ T381] Allocated by task 382: [ 23.707454][ T381] __kasan_kmalloc+0xd4/0x100 [ 23.712106][ T381] __kmalloc+0x19f/0x330 [ 23.716320][ T381] l2tp_session_create+0x39/0xb60 [ 23.721315][ T381] pppol2tp_connect+0xbf5/0x1640 [ 23.726244][ T381] __sys_connect+0x3ce/0x450 [ 23.730800][ T381] __x64_sys_connect+0x7a/0x90 [ 23.735555][ T381] do_syscall_64+0x31/0x40 [ 23.739956][ T381] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 23.745830][ T381] [ 23.748128][ T381] Freed by task 7: [ 23.751820][ T381] kasan_set_track+0x4a/0x70 [ 23.756382][ T381] kasan_set_free_info+0x23/0x40 [ 23.761292][ T381] ____kasan_slab_free+0x125/0x160 [ 23.766372][ T381] __kasan_slab_free+0x11/0x20 [ 23.771105][ T381] slab_free_freelist_hook+0xc5/0x190 [ 23.776459][ T381] kfree+0xc0/0x270 [ 23.780295][ T381] l2tp_session_put+0xb2/0x1a0 [ 23.785037][ T381] l2tp_session_delete+0x3a9/0x4a0 [ 23.790126][ T381] l2tp_tunnel_del_work+0x180/0x3d0 [ 23.795297][ T381] process_one_work+0x6fd/0xbc0 [ 23.800117][ T381] worker_thread+0xa8e/0x13c0 [ 23.804765][ T381] kthread+0x324/0x3b0 [ 23.808813][ T381] ret_from_fork+0x1f/0x30 [ 23.813197][ T381] [ 23.815505][ T381] The buggy address belongs to the object at ffff88810f37e800 [ 23.815505][ T381] which belongs to the cache kmalloc-512 of size 512 [ 23.829537][ T381] The buggy address is located 0 bytes inside of [ 23.829537][ T381] 512-byte region [ffff88810f37e800, ffff88810f37ea00) [ 23.842607][ T381] The buggy address belongs to the page: [ 23.848239][ T381] page:ffffea00043cdf00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10f37c [ 23.858450][ T381] head:ffffea00043cdf00 order:2 compound_mapcount:0 compound_pincount:0 [ 23.866747][ T381] flags: 0x4000000000010200(slab|head) [ 23.872194][ T381] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 [ 23.880774][ T381] raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 [ 23.889343][ T381] page dumped because: kasan: bad access detected [ 23.895756][ T381] page_owner tracks the page as allocated [ 23.901466][ T381] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 96, ts 3861978358, free_ts 0 [ 23.919416][ T381] prep_new_page+0x176/0x190 [ 23.923995][ T381] get_page_from_freelist+0x225f/0x23f0 [ 23.929525][ T381] __alloc_pages_nodemask+0x29a/0x640 [ 23.934884][ T381] new_slab+0x84/0x3f0 [ 23.938931][ T381] ___slab_alloc+0x2f8/0x4c0 [ 23.943496][ T381] __slab_alloc+0x63/0xa0 [ 23.947807][ T381] __kmalloc_track_caller+0x1e4/0x310 [ 23.953160][ T381] __alloc_skb+0xdc/0x520 [ 23.957466][ T381] alloc_uevent_skb+0x85/0x240 [ 23.962206][ T381] kobject_uevent_net_broadcast+0x335/0x5a0 [ 23.968072][ T381] kobject_uevent_env+0x52b/0x700 [ 23.973071][ T381] kobject_synth_uevent+0x452/0x940 [ 23.978242][ T381] uevent_store+0x4b/0x70 [ 23.982545][ T381] drv_attr_store+0x79/0xa0 [ 23.987024][ T381] sysfs_kf_write+0x129/0x150 [ 23.991673][ T381] kernfs_fop_write_iter+0x2bd/0x400 [ 23.996928][ T381] page_owner free stack trace missing [ 24.002271][ T381] [ 24.004579][ T381] Memory state around the buggy address: [ 24.010181][ T381] ffff88810f37e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.018220][ T381] ffff88810f37e780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.026253][ T381] >ffff88810f37e800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.034287][ T381] ^ [ 24.038329][ T381] ffff88810f37e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.046361][ T381] ffff88810f37e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.054391][ T381] ================================================================== [ 24.062421][ T381] Disabling lock debugging due to kernel taint [ 24.070354][ T381] ------------[ cut here ]------------ [ 24.077472][ T381] WARNING: CPU: 0 PID: 381 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 [ 24.087464][ T381] Modules linked in: [ 24.091348][ T381] CPU: 0 PID: 381 Comm: syz.2.17 Tainted: G B syzkaller #0 [ 24.099984][ T381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 [ 24.110562][ T381] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 [ 24.116919][ T381] Code: 5d c3 e8 ec bd 34 fd be 02 00 00 00 eb 0a e8 e0 bd 34 fd be 01 00 00 00 4c 89 f7 e8 f3 3b 0e fe e9 0f ff ff ff e8 c9 bd 34 fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 b8 bd 34 fd 4c 89 f7 be 03 [ 24.136556][ T381] RSP: 0018:ffffc90002e07d68 EFLAGS: 00010293 [ 24.142624][ T381] RAX: ffffffff842ff8f7 RBX: ffff88810fb65800 RCX: ffff88810fd06400 [ 24.150657][ T381] RDX: 0000000000000000 RSI: 000000000ccc0480 RDI: 000000000c04eb7d [ 24.158656][ T381] RBP: ffffc90002e07d88 R08: 0000000000000003 R09: 0000000000000004 [ 24.166700][ T381] R10: dffffc0000000000 R11: fffffbfff0dcfa48 R12: dffffc0000000000 [ 24.174697][ T381] R13: dffffc0000000000 R14: 000000000ccc0480 R15: ffff88810f37e800 [ 24.182693][ T381] FS: 00005555938a7500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 24.191834][ T381] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.198559][ T381] CR2: 0000000000000000 CR3: 0000000127eb4000 CR4: 00000000003506b0 [ 24.206590][ T381] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.214594][ T381] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.222597][ T381] Call Trace: [ 24.225938][ T381] pppol2tp_release+0x150/0x2b0 [ 24.230786][ T381] sock_close+0xb8/0x200 [ 24.235043][ T381] ? sock_mmap+0xa0/0xa0 [ 24.239285][ T381] __fput+0x2dc/0x730 [ 24.243278][ T381] ____fput+0x15/0x20 [ 24.247258][ T381] task_work_run+0x127/0x190 [ 24.251845][ T381] exit_to_user_mode_loop+0xcb/0xe0 [ 24.257060][ T381] exit_to_user_mode_prepare+0x76/0xa0 [ 24.262523][ T381] syscall_exit_to_user_mode+0x1d/0x40 [ 24.268089][ T381] do_syscall_64+0x3d/0x40 [ 24.272504][ T381] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.278408][ T381] RIP: 0033:0x7f86e04a7b19 [ 24.282833][ T381] 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 [ 24.302471][ T381] RSP: 002b:00007ffcd5d8f2c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 24.310907][ T381] RAX: 0000000000000000 RBX: 00007ffcd5d8f3b0 RCX: 00007f86e04a7b19 [ 24.318896][ T381] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 24.326882][ T381] RBP: 0000000000005b99 R08: 0000000000000001 R09: 0000000000000000 [ 24.334870][ T381] R10: 0000001b32a20000 R11: 0000000000000246 R12: 00007ffcd5d8f3f0 [ 24.343046][ T381] R13: 00007f86e072dfac R14: 0000000000005bcc R15: 00007f86e072dfa0 [ 24.351259][ T381] ---[ end trace f6b679979fa71f98 ]---