rocess permissive=1 [ 14.778131][ T28] audit: type=1400 audit(1791624577.681:63): avc: denied { siginh } for pid=224 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.203' (ED25519) to the list of known hosts. 2026/10/10 09:29:47 parsed 1 programs 2026/10/10 09:29:47 serving rpc on tcp://35483 [ 24.122258][ T28] audit: type=1400 audit(1791624587.021:64): avc: denied { node_bind } for pid=294 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 24.143426][ T28] audit: type=1400 audit(1791624587.021:65): avc: denied { module_request } for pid=294 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 [ 25.345501][ T28] audit: type=1400 audit(1791624588.241:66): 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 [ 25.349063][ T301] cgroup: Unknown subsys name 'net' [ 25.368291][ T28] audit: type=1400 audit(1791624588.241:67): 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 [ 25.395556][ T28] audit: type=1400 audit(1791624588.271:68): 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 [ 25.395951][ T301] cgroup: Unknown subsys name 'devices' [ 25.510571][ T301] cgroup: Unknown subsys name 'hugetlb' [ 25.516231][ T301] cgroup: Unknown subsys name 'rlimit' [ 25.659483][ T28] audit: type=1400 audit(1791624588.561:69): 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 [ 25.682879][ T28] audit: type=1400 audit(1791624588.561:70): 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 [ 25.703299][ T28] audit: type=1400 audit(1791624588.561:71): 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 [ 25.723997][ T28] audit: type=1400 audit(1791624588.561:72): 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 [ 25.744247][ T28] audit: type=1400 audit(1791624588.561:73): 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 [ 25.749541][ T304] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 25.814629][ T301] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 26.490668][ T307] request_module fs-gadgetfs succeeded, but still no fs? [ 27.200305][ T349] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.207378][ T349] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.214988][ T349] device bridge_slave_0 entered promiscuous mode [ 27.221981][ T349] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.229216][ T349] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.236633][ T349] device bridge_slave_1 entered promiscuous mode [ 27.283622][ T349] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.290716][ T349] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.298103][ T349] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.305169][ T349] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.326188][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.333905][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.341492][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.350801][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 27.359258][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.366666][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.381436][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.389721][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.396750][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.415764][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.425469][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.441340][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.453421][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.461885][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.469500][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.483370][ T349] device veth0_vlan entered promiscuous mode [ 27.493841][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.503254][ T349] device veth1_macvtap entered promiscuous mode [ 27.512639][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.524476][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/10/10 09:29:50 executed programs: 0 [ 27.881072][ T369] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.888274][ T369] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.895671][ T369] device bridge_slave_0 entered promiscuous mode [ 27.902808][ T369] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.909931][ T369] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.917416][ T369] device bridge_slave_1 entered promiscuous mode [ 27.972308][ T369] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.979397][ T369] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.986669][ T369] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.993738][ T369] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.017368][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.025017][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.032615][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.042249][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.050547][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.057619][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.067001][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.075363][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.082438][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.095102][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.104545][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.119534][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.131532][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.139916][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.147337][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.156302][ T369] device veth0_vlan entered promiscuous mode [ 28.167265][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.176516][ T369] device veth1_macvtap entered promiscuous mode [ 28.186332][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.196510][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 28.219926][ T374] ================================================================== [ 28.228042][ T374] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 28.236242][ T374] Read of size 4 at addr ffff888112887000 by task syz.2.17/374 [ 28.243781][ T374] [ 28.246134][ T374] CPU: 0 PID: 374 Comm: syz.2.17 Not tainted syzkaller #0 [ 28.253251][ T374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 [ 28.263339][ T374] Call Trace: [ 28.266618][ T374] [ 28.269553][ T374] __dump_stack+0x21/0x24 [ 28.273915][ T374] dump_stack_lvl+0x110/0x170 [ 28.278603][ T374] ? __cfi_dump_stack_lvl+0x8/0x8 [ 28.283660][ T374] ? _raw_spin_lock_bh+0x94/0xf0 [ 28.288619][ T374] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 28.294361][ T374] print_address_description+0x71/0x200 [ 28.299920][ T374] print_report+0x4a/0x60 [ 28.304267][ T374] kasan_report+0x122/0x150 [ 28.308783][ T374] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 28.314520][ T374] __asan_report_load4_noabort+0x14/0x20 [ 28.320159][ T374] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 28.325725][ T374] pppol2tp_release+0x150/0x2b0 [ 28.330602][ T374] sock_close+0xc9/0x220 [ 28.334873][ T374] ? __cfi_sock_close+0x10/0x10 [ 28.339747][ T374] __fput+0x1fd/0x8f0 [ 28.343750][ T374] ____fput+0x15/0x20 [ 28.347748][ T374] task_work_run+0x1e1/0x250 [ 28.352380][ T374] ? __cfi_task_work_run+0x10/0x10 [ 28.357514][ T374] ? __cfi___close_range+0x10/0x10 [ 28.362641][ T374] exit_to_user_mode_loop+0x9b/0xb0 [ 28.367863][ T374] exit_to_user_mode_prepare+0x87/0xd0 [ 28.373340][ T374] syscall_exit_to_user_mode+0x1a/0x30 [ 28.378821][ T374] do_syscall_64+0x58/0xa0 [ 28.383259][ T374] ? clear_bhb_loop+0x30/0x80 [ 28.387952][ T374] ? clear_bhb_loop+0x30/0x80 [ 28.392655][ T374] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 28.400655][ T374] RIP: 0033:0x7feb6b99e1d9 [ 28.405113][ T374] 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 [ 28.424735][ T374] RSP: 002b:00007ffd1b9336b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 28.433172][ T374] RAX: 0000000000000000 RBX: 00007ffd1b9337a0 RCX: 00007feb6b99e1d9 [ 28.441160][ T374] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 28.449167][ T374] RBP: 0000000000006e1e R08: 0000000000000001 R09: 0000000000000000 [ 28.457256][ T374] R10: 0000001b33020000 R11: 0000000000000246 R12: 0000000000000000 [ 28.465241][ T374] R13: 00007feb6bc25fac R14: 00007feb6bc25fa8 R15: 00007feb6bc25fa0 [ 28.473338][ T374] [ 28.476368][ T374] [ 28.478702][ T374] Allocated by task 374: [ 28.482955][ T374] kasan_set_track+0x4b/0x70 [ 28.487568][ T374] kasan_save_alloc_info+0x1f/0x30 [ 28.492713][ T374] __kasan_kmalloc+0x95/0xb0 [ 28.497324][ T374] __kmalloc+0xb4/0x1e0 [ 28.501513][ T374] l2tp_session_create+0x38/0xbd0 [ 28.506554][ T374] pppol2tp_connect+0xbf5/0x1640 [ 28.511510][ T374] __sys_connect+0x3da/0x460 [ 28.516119][ T374] __x64_sys_connect+0x7a/0x90 [ 28.521160][ T374] x64_sys_call+0x88d/0x9a0 [ 28.525681][ T374] do_syscall_64+0x4c/0xa0 [ 28.530114][ T374] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 28.536044][ T374] [ 28.538378][ T374] Freed by task 8: [ 28.542120][ T374] kasan_set_track+0x4b/0x70 [ 28.546727][ T374] kasan_save_free_info+0x2b/0x40 [ 28.551760][ T374] ____kasan_slab_free+0x132/0x180 [ 28.556915][ T374] __kasan_slab_free+0x11/0x20 [ 28.561697][ T374] slab_free_freelist_hook+0xc2/0x190 [ 28.567081][ T374] __kmem_cache_free+0xb7/0x1b0 [ 28.571955][ T374] kfree+0x6f/0xf0 [ 28.575688][ T374] l2tp_session_put+0xaf/0x1a0 [ 28.580467][ T374] l2tp_session_delete+0x3df/0x4d0 [ 28.585603][ T374] l2tp_tunnel_del_work+0x199/0x410 [ 28.590833][ T374] process_one_work+0x717/0xc30 [ 28.595702][ T374] worker_thread+0xa4d/0x11d0 [ 28.600396][ T374] kthread+0x281/0x320 [ 28.604517][ T374] ret_from_fork+0x1f/0x30 [ 28.608951][ T374] [ 28.611281][ T374] The buggy address belongs to the object at ffff888112887000 [ 28.611281][ T374] which belongs to the cache kmalloc-512 of size 512 [ 28.625450][ T374] The buggy address is located 0 bytes inside of [ 28.625450][ T374] 512-byte region [ffff888112887000, ffff888112887200) [ 28.638566][ T374] [ 28.640987][ T374] The buggy address belongs to the physical page: [ 28.647429][ T374] page:ffffea00044a2100 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112884 [ 28.657695][ T374] head:ffffea00044a2100 order:2 compound_mapcount:0 compound_pincount:0 [ 28.666029][ T374] flags: 0x4000000000010200(slab|head|zone=1) [ 28.672119][ T374] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100042f00 [ 28.680802][ T374] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 28.689400][ T374] page dumped because: kasan: bad access detected [ 28.695828][ T374] page_owner tracks the page as allocated [ 28.701545][ T374] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 103, tgid 103 (udevadm), ts 5834589019, free_ts 0 [ 28.721350][ T374] post_alloc_hook+0x1f5/0x210 [ 28.726134][ T374] prep_new_page+0x1c/0x110 [ 28.730739][ T374] get_page_from_freelist+0x2ca9/0x2d20 [ 28.736305][ T374] __alloc_pages+0x1fa/0x610 [ 28.740907][ T374] alloc_slab_page+0x6e/0xf0 [ 28.745502][ T374] new_slab+0x98/0x3e0 [ 28.749576][ T374] ___slab_alloc+0x70f/0xb70 [ 28.754186][ T374] __slab_alloc+0x5e/0xa0 [ 28.758537][ T374] __kmem_cache_alloc_node+0x204/0x2d0 [ 28.764014][ T374] __kmalloc_node_track_caller+0xa1/0x1e0 [ 28.769740][ T374] __alloc_skb+0x226/0x4a0 [ 28.774183][ T374] alloc_uevent_skb+0x85/0x240 [ 28.778958][ T374] kobject_uevent_net_broadcast+0x343/0x5b0 [ 28.784861][ T374] kobject_uevent_env+0x541/0x720 [ 28.789898][ T374] kobject_synth_uevent+0x457/0x940 [ 28.795108][ T374] store_uevent+0x16/0x30 [ 28.799452][ T374] page_owner free stack trace missing [ 28.804824][ T374] [ 28.807158][ T374] Memory state around the buggy address: [ 28.812792][ T374] ffff888112886f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.820865][ T374] ffff888112886f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.828965][ T374] >ffff888112887000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.837034][ T374] ^ [ 28.841108][ T374] ffff888112887080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.849265][ T374] ffff888112887100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.857447][ T374] ================================================================== [ 28.867008][ T374] Disabling lock debugging due to kernel taint [ 28.886689][ T374] ------------[ cut here ]------------ [ 28.892447][ T374] WARNING: CPU: 1 PID: 374 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 [ 28.902672][ T374] Modules linked in: [ 28.906590][ T374] CPU: 1 PID: 374 Comm: syz.2.17 Tainted: G B syzkaller #0 [ 28.915226][ T374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 [ 28.925402][ T374] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 [ 28.931794][ T374] Code: 5d c3 e8 dc 3c d5 fc be 02 00 00 00 eb 0a e8 d0 3c d5 fc be 01 00 00 00 4c 89 f7 e8 83 01 cd fd e9 0f ff ff ff e8 b9 3c d5 fc <0f> 0b 48 89 df e8 ff 00 00 00 eb bd e8 a8 3c d5 fc 4c 89 f7 be 03 [ 28.951486][ T374] RSP: 0018:ffffc900009c7cb0 EFLAGS: 00010293 [ 28.957565][ T374] RAX: ffffffff849c3187 RBX: ffff88811456f000 RCX: ffff888112ed2880 [ 28.965587][ T374] RDX: 0000000000000000 RSI: 0000000021c38300 RDI: 000000000c04eb7d [ 28.973636][ T374] RBP: ffffc900009c7cd0 R08: ffffffff87b767e7 R09: 1ffffffff0f6ecfc [ 28.981667][ T374] R10: dffffc0000000000 R11: fffffbfff0f6ecfd R12: dffffc0000000000 [ 28.989685][ T374] R13: dffffc0000000000 R14: 0000000021c38300 R15: ffff888112887000 [ 28.997684][ T374] FS: 000055557899f500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 29.006659][ T374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.013386][ T374] CR2: 00007feb6b9eb8c0 CR3: 0000000121ea8000 CR4: 00000000003506a0 [ 29.021429][ T374] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.029505][ T374] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.037488][ T374] Call Trace: [ 29.040818][ T374] [ 29.043876][ T374] pppol2tp_release+0x150/0x2b0 [ 29.048787][ T374] sock_close+0xc9/0x220 [ 29.053144][ T374] ? __cfi_sock_close+0x10/0x10 [ 29.058049][ T374] __fput+0x1fd/0x8f0 [ 29.062060][ T374] ____fput+0x15/0x20 [ 29.066053][ T374] task_work_run+0x1e1/0x250 [ 29.070708][ T374] ? __cfi_task_work_run+0x10/0x10 [ 29.075867][ T374] ? __cfi___close_range+0x10/0x10 [ 29.081052][ T374] exit_to_user_mode_loop+0x9b/0xb0 [ 29.086282][ T374] exit_to_user_mode_prepare+0x87/0xd0 [ 29.091858][ T374] syscall_exit_to_user_mode+0x1a/0x30 [ 29.097346][ T374] do_syscall_64+0x58/0xa0 [ 29.101821][ T374] ? clear_bhb_loop+0x30/0x80 [ 29.106547][ T374] ? clear_bhb_loop+0x30/0x80 [ 29.111357][ T374] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 29.117285][ T374] RIP: 0033:0x7feb6b99e1d9 [ 29.121761][ T374] 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 [ 29.141407][ T374] RSP: 002b:00007ffd1b9336b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 29.149881][ T374] RAX: 0000000000000000 RBX: 00007ffd1b9337a0 RCX: 00007feb6b99e1d9 [ 29.157925][ T374] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 29.165920][ T374] RBP: 0000000000006e1e R08: 0000000000000001 R09: 0000000000000000 [ 29.173959][ T374] R10: 0000001b33020000 R11: 0000000000000246 R12: 0000000000000000 [ 29.181970][ T374] R13: 00007feb6bc25fac R14: 00007feb6bc25fa8 R15: 00007feb6bc25fa0 [ 29.190053][ T374] [ 29.193088][ T374] ---[ end trace 0000000000000000 ]---