Warning: Permanently added '10.128.1.43' (ED25519) to the list of known hosts. 2026/07/06 19:13:10 parsed 1 programs 2026/07/06 19:13:10 serving rpc on tcp://34341 [ 20.820436][ T24] audit: type=1400 audit(1783365190.009:64): 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 [ 20.841182][ T24] audit: type=1400 audit(1783365190.009:65): 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 [ 20.860910][ T24] audit: type=1400 audit(1783365190.009:66): 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 [ 21.464786][ T24] audit: type=1400 audit(1783365190.649:67): 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 [ 21.465780][ T293] cgroup: Unknown subsys name 'net' [ 21.487435][ T24] audit: type=1400 audit(1783365190.649:68): 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 [ 21.514666][ T24] audit: type=1400 audit(1783365190.679:69): 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 [ 21.514827][ T293] cgroup: Unknown subsys name 'devices' [ 21.631433][ T293] cgroup: Unknown subsys name 'hugetlb' [ 21.637040][ T293] cgroup: Unknown subsys name 'rlimit' [ 21.778874][ T24] audit: type=1400 audit(1783365190.959:70): 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 [ 21.802012][ T24] audit: type=1400 audit(1783365190.959:71): 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 [ 21.822394][ T24] audit: type=1400 audit(1783365190.959:72): 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 [ 21.827738][ T297] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 21.842650][ T24] audit: type=1400 audit(1783365190.959:73): 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 [ 21.876268][ T293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 22.243343][ T300] request_module fs-gadgetfs succeeded, but still no fs? [ 22.253640][ T300] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 22.513858][ T325] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.521077][ T325] bridge0: port 1(bridge_slave_0) entered disabled state [ 22.528340][ T325] device bridge_slave_0 entered promiscuous mode [ 22.536010][ T325] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.543099][ T325] bridge0: port 2(bridge_slave_1) entered disabled state [ 22.550346][ T325] device bridge_slave_1 entered promiscuous mode [ 22.581215][ T325] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.588239][ T325] bridge0: port 2(bridge_slave_1) entered forwarding state [ 22.595512][ T325] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.602566][ T325] bridge0: port 1(bridge_slave_0) entered forwarding state [ 22.617626][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 22.625172][ T9] bridge0: port 1(bridge_slave_0) entered disabled state [ 22.632370][ T9] bridge0: port 2(bridge_slave_1) entered disabled state [ 22.641024][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 22.649161][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 22.656178][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 22.665110][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 22.673341][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 22.680366][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 22.691336][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 22.700697][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 22.713196][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 22.723520][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 22.731524][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 22.738815][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 22.746790][ T325] device veth0_vlan entered promiscuous mode [ 22.755719][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 22.765662][ T325] device veth1_macvtap entered promiscuous mode [ 22.774592][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 22.784054][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/07/06 19:13:12 executed programs: 0 [ 23.247810][ T364] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.255250][ T364] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.262705][ T364] device bridge_slave_0 entered promiscuous mode [ 23.270641][ T364] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.277645][ T364] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.285042][ T364] device bridge_slave_1 entered promiscuous mode [ 23.327214][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 23.334724][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 23.347207][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 23.355716][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 23.363925][ T329] bridge0: port 1(bridge_slave_0) entered blocking state [ 23.370954][ T329] bridge0: port 1(bridge_slave_0) entered forwarding state [ 23.379136][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 23.386719][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 23.394922][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 23.403117][ T329] bridge0: port 2(bridge_slave_1) entered blocking state [ 23.410139][ T329] bridge0: port 2(bridge_slave_1) entered forwarding state [ 23.423758][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 23.431975][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 23.440847][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 23.448838][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 23.464611][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 23.473432][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 23.483572][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 23.491580][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 23.499742][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 23.507144][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 23.515230][ T364] device veth0_vlan entered promiscuous mode [ 23.526975][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 23.535815][ T364] device veth1_macvtap entered promiscuous mode [ 23.544866][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 23.553312][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 23.562555][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 23.570669][ T329] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 23.579333][ T112] device bridge_slave_1 left promiscuous mode [ 23.585470][ T112] bridge0: port 2(bridge_slave_1) entered disabled state [ 23.592847][ T112] device bridge_slave_0 left promiscuous mode [ 23.598920][ T112] bridge0: port 1(bridge_slave_0) entered disabled state [ 23.606599][ T112] device veth1_macvtap left promiscuous mode [ 23.612746][ T112] device veth0_vlan left promiscuous mode [ 23.686119][ T368] ================================================================== [ 23.694213][ T368] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 23.702250][ T368] Read of size 4 at addr ffff8881114a6c00 by task syz.2.17/368 [ 23.709770][ T368] [ 23.712083][ T368] CPU: 0 PID: 368 Comm: syz.2.17 Not tainted syzkaller #0 [ 23.719157][ T368] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 23.729182][ T368] Call Trace: [ 23.732449][ T368] __dump_stack+0x21/0x24 [ 23.736747][ T368] dump_stack_lvl+0x1a7/0x208 [ 23.741398][ T368] ? show_regs_print_info+0x18/0x18 [ 23.746564][ T368] ? thaw_kernel_threads+0x220/0x220 [ 23.751823][ T368] print_address_description+0x7f/0x2c0 [ 23.757339][ T368] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 23.763027][ T368] kasan_report+0x100/0x140 [ 23.767497][ T368] ? __kasan_check_write+0x14/0x20 [ 23.772578][ T368] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 23.778267][ T368] __asan_report_load4_noabort+0x14/0x20 [ 23.783867][ T368] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 23.789379][ T368] pppol2tp_release+0x150/0x2b0 [ 23.794202][ T368] sock_close+0xb8/0x200 [ 23.798411][ T368] ? sock_mmap+0xa0/0xa0 [ 23.802621][ T368] __fput+0x2dc/0x730 [ 23.806569][ T368] ____fput+0x15/0x20 [ 23.810516][ T368] task_work_run+0x127/0x190 [ 23.815075][ T368] exit_to_user_mode_loop+0xcb/0xe0 [ 23.820240][ T368] exit_to_user_mode_prepare+0x76/0xa0 [ 23.825669][ T368] syscall_exit_to_user_mode+0x1d/0x40 [ 23.831093][ T368] do_syscall_64+0x3d/0x40 [ 23.835478][ T368] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 23.841338][ T368] RIP: 0033:0x7feff1d78e59 [ 23.845720][ T368] 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 [ 23.865297][ T368] RSP: 002b:00007fffda2bbe48 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 23.873683][ T368] RAX: 0000000000000000 RBX: 00007fffda2bbf30 RCX: 00007feff1d78e59 [ 23.881630][ T368] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 23.889570][ T368] RBP: 0000000000005c71 R08: 0000000000000001 R09: 0000000000000000 [ 23.897514][ T368] R10: 0000001b32b20000 R11: 0000000000000246 R12: 0000000000000000 [ 23.905454][ T368] R13: 00007feff2000fac R14: 00007feff2000fa8 R15: 00007feff2000fa0 [ 23.913394][ T368] [ 23.915693][ T368] Allocated by task 368: [ 23.919914][ T368] __kasan_kmalloc+0xd4/0x100 [ 23.924567][ T368] __kmalloc+0x19f/0x330 [ 23.928779][ T368] l2tp_session_create+0x39/0xb60 [ 23.933769][ T368] pppol2tp_connect+0xbf5/0x1640 [ 23.938670][ T368] __sys_connect+0x3ce/0x450 [ 23.943223][ T368] __x64_sys_connect+0x7a/0x90 [ 23.947954][ T368] do_syscall_64+0x31/0x40 [ 23.952345][ T368] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 23.958201][ T368] [ 23.960501][ T368] Freed by task 7: [ 23.964195][ T368] kasan_set_track+0x4a/0x70 [ 23.968750][ T368] kasan_set_free_info+0x23/0x40 [ 23.973655][ T368] ____kasan_slab_free+0x125/0x160 [ 23.978735][ T368] __kasan_slab_free+0x11/0x20 [ 23.983466][ T368] slab_free_freelist_hook+0xc5/0x190 [ 23.988803][ T368] kfree+0xc0/0x270 [ 23.992579][ T368] l2tp_session_put+0xb2/0x1a0 [ 23.997316][ T368] l2tp_session_delete+0x3a9/0x4a0 [ 24.002393][ T368] l2tp_tunnel_del_work+0x180/0x3d0 [ 24.007558][ T368] process_one_work+0x6fd/0xbc0 [ 24.012378][ T368] worker_thread+0xa8e/0x13c0 [ 24.017039][ T368] kthread+0x324/0x3b0 [ 24.021079][ T368] ret_from_fork+0x1f/0x30 [ 24.025460][ T368] [ 24.027756][ T368] The buggy address belongs to the object at ffff8881114a6c00 [ 24.027756][ T368] which belongs to the cache kmalloc-512 of size 512 [ 24.041776][ T368] The buggy address is located 0 bytes inside of [ 24.041776][ T368] 512-byte region [ffff8881114a6c00, ffff8881114a6e00) [ 24.054836][ T368] The buggy address belongs to the page: [ 24.060451][ T368] page:ffffea0004452900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1114a4 [ 24.070650][ T368] head:ffffea0004452900 order:2 compound_mapcount:0 compound_pincount:0 [ 24.078944][ T368] flags: 0x4000000000010200(slab|head) [ 24.084371][ T368] raw: 4000000000010200 0000000000000000 0000000100000001 ffff888100043080 [ 24.092923][ T368] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 24.101471][ T368] page dumped because: kasan: bad access detected [ 24.107856][ T368] page_owner tracks the page as allocated [ 24.113548][ T368] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 97, ts 3807213078, free_ts 0 [ 24.131477][ T368] prep_new_page+0x176/0x190 [ 24.136034][ T368] get_page_from_freelist+0x225f/0x23f0 [ 24.141548][ T368] __alloc_pages_nodemask+0x29a/0x640 [ 24.146886][ T368] new_slab+0x84/0x3f0 [ 24.150920][ T368] ___slab_alloc+0x2f8/0x4c0 [ 24.155473][ T368] __slab_alloc+0x63/0xa0 [ 24.159787][ T368] __kmalloc_track_caller+0x1e4/0x310 [ 24.165126][ T368] __alloc_skb+0xdc/0x520 [ 24.169425][ T368] alloc_skb_with_frags+0xa3/0x560 [ 24.174509][ T368] sock_alloc_send_pskb+0x87f/0x9a0 [ 24.179673][ T368] unix_dgram_sendmsg+0x6f3/0x18f0 [ 24.184752][ T368] sock_write_iter+0x2a6/0x3a0 [ 24.189487][ T368] vfs_write+0x770/0xd70 [ 24.193695][ T368] ksys_write+0x14a/0x260 [ 24.197992][ T368] __x64_sys_write+0x7b/0x90 [ 24.202552][ T368] do_syscall_64+0x31/0x40 [ 24.206941][ T368] page_owner free stack trace missing [ 24.212274][ T368] [ 24.214572][ T368] Memory state around the buggy address: [ 24.220169][ T368] ffff8881114a6b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.228196][ T368] ffff8881114a6b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.236222][ T368] >ffff8881114a6c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.244246][ T368] ^ [ 24.248284][ T368] ffff8881114a6c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.256316][ T368] ffff8881114a6d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.264346][ T368] ================================================================== [ 24.272374][ T368] Disabling lock debugging due to kernel taint [ 24.280872][ T368] ------------[ cut here ]------------ [ 24.286340][ T368] WARNING: CPU: 0 PID: 368 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 [ 24.296317][ T368] Modules linked in: [ 24.300824][ T368] CPU: 0 PID: 368 Comm: syz.2.17 Tainted: G B syzkaller #0 [ 24.309315][ T368] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 24.319410][ T368] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 [ 24.326018][ T368] Code: 5d c3 e8 ec 08 36 fd be 02 00 00 00 eb 0a e8 e0 08 36 fd be 01 00 00 00 4c 89 f7 e8 53 73 0f fe e9 0f ff ff ff e8 c9 08 36 fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 b8 08 36 fd 4c 89 f7 be 03 [ 24.346040][ T368] RSP: 0018:ffffc90002d27d68 EFLAGS: 00010293 [ 24.352138][ T368] RAX: ffffffff842e99a7 RBX: ffff8881113f5800 RCX: ffff88810df78000 [ 24.360160][ T368] RDX: 0000000000000000 RSI: 000000000b014ae0 RDI: 000000000c04eb7d [ 24.368111][ T368] RBP: ffffc90002d27d88 R08: 0000000000000003 R09: 0000000000000004 [ 24.376114][ T368] R10: dffffc0000000000 R11: fffffbfff0dcf648 R12: dffffc0000000000 [ 24.384107][ T368] R13: dffffc0000000000 R14: 000000000b014ae0 R15: ffff8881114a6c00 [ 24.392104][ T368] FS: 00005555826f5500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 24.401045][ T368] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.407618][ T368] CR2: 0000000000000000 CR3: 0000000110a8e000 CR4: 00000000003506b0 [ 24.415811][ T368] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.423882][ T368] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.431951][ T368] Call Trace: [ 24.435255][ T368] pppol2tp_release+0x150/0x2b0 [ 24.440140][ T368] sock_close+0xb8/0x200 [ 24.444385][ T368] ? sock_mmap+0xa0/0xa0 [ 24.448623][ T368] __fput+0x2dc/0x730 [ 24.452620][ T368] ____fput+0x15/0x20 [ 24.456594][ T368] task_work_run+0x127/0x190 [ 24.461181][ T368] exit_to_user_mode_loop+0xcb/0xe0 [ 24.466370][ T368] exit_to_user_mode_prepare+0x76/0xa0 [ 24.471828][ T368] syscall_exit_to_user_mode+0x1d/0x40 [ 24.477277][ T368] do_syscall_64+0x3d/0x40 [ 24.481694][ T368] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.487572][ T368] RIP: 0033:0x7feff1d78e59 [ 24.492073][ T368] 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 [ 24.511858][ T368] RSP: 002b:00007fffda2bbe48 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 24.520376][ T368] RAX: 0000000000000000 RBX: 00007fffda2bbf30 RCX: 00007feff1d78e59 [ 24.528386][ T368] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 24.536461][ T368] RBP: 0000000000005c71 R08: 0000000000000001 R09: 0000000000000000 [ 24.544542][ T368] R10: 0000001b32b20000 R11: 0000000000000246 R12: 0000000000000000 [ 24.552551][ T368] R13: 00007feff2000fac R14: 00007feff2000fa8 R15: 00007feff2000fa0 [ 24.560541][ T368] ---[ end trace 94edbd5cc219d0a1 ]---