rocess permissive=1 [ 14.825330][ T28] audit: type=1400 audit(1781480142.440:63): 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 Warning: Permanently added '10.128.0.45' (ED25519) to the list of known hosts. 2026/06/14 23:35:51 parsed 1 programs [ 24.256401][ T28] audit: type=1400 audit(1781480151.880:64): 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 [ 24.277165][ T28] audit: type=1400 audit(1781480151.880:65): 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 [ 25.022143][ T28] audit: type=1400 audit(1781480152.650:66): avc: denied { mounton } for pid=303 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 [ 25.023147][ T303] cgroup: Unknown subsys name 'net' [ 25.045341][ T28] audit: type=1400 audit(1781480152.650:67): avc: denied { mount } for pid=303 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 [ 25.072594][ T28] audit: type=1400 audit(1781480152.680:68): avc: denied { unmount } for pid=303 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 25.072776][ T303] cgroup: Unknown subsys name 'devices' [ 25.212066][ T303] cgroup: Unknown subsys name 'hugetlb' [ 25.217667][ T303] cgroup: Unknown subsys name 'rlimit' [ 25.365524][ T28] audit: type=1400 audit(1781480152.990:69): avc: denied { setattr } for pid=303 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 [ 25.388679][ T28] audit: type=1400 audit(1781480152.990:70): avc: denied { create } for pid=303 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 [ 25.394103][ T306] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 25.409132][ T28] audit: type=1400 audit(1781480152.990:71): avc: denied { write } for pid=303 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 25.437972][ T28] audit: type=1400 audit(1781480152.990:72): avc: denied { read } for pid=303 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 25.445496][ T303] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 25.458343][ T28] audit: type=1400 audit(1781480152.990:73): avc: denied { mounton } for pid=303 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 [ 26.126051][ T308] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.133173][ T308] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.140814][ T308] device bridge_slave_0 entered promiscuous mode [ 26.147979][ T308] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.155131][ T308] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.162757][ T308] device bridge_slave_1 entered promiscuous mode [ 26.201261][ T308] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.208299][ T308] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.215590][ T308] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.222635][ T308] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.239788][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.247036][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.254554][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 26.262352][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.271696][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.279907][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.286956][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.295685][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.303935][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.310969][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.322885][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.332045][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.345152][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.355861][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.364046][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.371621][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.379570][ T308] device veth0_vlan entered promiscuous mode [ 26.389311][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.398355][ T308] device veth1_macvtap entered promiscuous mode [ 26.407305][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.417361][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.434347][ T308] request_module fs-gadgetfs succeeded, but still no fs? [ 26.457276][ T308] syz-executor (308) used greatest stack depth: 21920 bytes left [ 26.982061][ T43] device bridge_slave_1 left promiscuous mode [ 26.988222][ T43] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.002123][ T43] device bridge_slave_0 left promiscuous mode [ 27.008284][ T43] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.016590][ T43] device veth1_macvtap left promiscuous mode [ 27.022704][ T43] device veth0_vlan left promiscuous mode 2026/06/14 23:35:54 executed programs: 0 [ 27.341102][ T370] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.348249][ T370] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.356004][ T370] device bridge_slave_0 entered promiscuous mode [ 27.363101][ T370] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.370167][ T370] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.377550][ T370] device bridge_slave_1 entered promiscuous mode [ 27.411093][ T370] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.418123][ T370] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.425396][ T370] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.432436][ T370] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.449123][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.456698][ T324] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.464113][ T324] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.473821][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 27.482167][ T324] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.489186][ T324] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.497705][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.505975][ T324] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.513038][ T324] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.525543][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.534544][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.547198][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.557895][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.565912][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.573721][ T324] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.581874][ T370] device veth0_vlan entered promiscuous mode [ 27.591282][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.600185][ T370] device veth1_macvtap entered promiscuous mode [ 27.609213][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.618946][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.641853][ T374] ================================================================== [ 27.649930][ T374] BUG: KASAN: use-after-free in rcu_segcblist_enqueue+0x62/0xb0 [ 27.657573][ T374] Write of size 8 at addr ffff88812a7cc590 by task syz.2.17/374 [ 27.665202][ T374] [ 27.667519][ T374] CPU: 1 PID: 374 Comm: syz.2.17 Not tainted syzkaller #0 [ 27.674618][ T374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 27.684677][ T374] Call Trace: [ 27.687937][ T374] [ 27.690847][ T374] __dump_stack+0x21/0x24 [ 27.695157][ T374] dump_stack_lvl+0x110/0x170 [ 27.699926][ T374] ? __cfi_dump_stack_lvl+0x8/0x8 [ 27.704933][ T374] ? rcu_segcblist_enqueue+0x62/0xb0 [ 27.710203][ T374] print_address_description+0x71/0x200 [ 27.715756][ T374] print_report+0x4a/0x60 [ 27.720071][ T374] kasan_report+0x122/0x150 [ 27.724563][ T374] ? rcu_segcblist_enqueue+0x62/0xb0 [ 27.729829][ T374] __asan_report_store8_noabort+0x17/0x20 [ 27.735527][ T374] rcu_segcblist_enqueue+0x62/0xb0 [ 27.740618][ T374] call_rcu+0x554/0xf50 [ 27.744752][ T374] ? __cfi_call_rcu+0x10/0x10 [ 27.749415][ T374] ? mutex_unlock+0x8f/0x230 [ 27.753998][ T374] ? __cfi_mutex_unlock+0x10/0x10 [ 27.759014][ T374] ? __kasan_check_write+0x14/0x20 [ 27.764111][ T374] ? l2tp_session_delete+0x48/0x4d0 [ 27.769292][ T374] pppol2tp_release+0x1e3/0x2b0 [ 27.774119][ T374] sock_close+0xc9/0x220 [ 27.778343][ T374] ? __cfi_sock_close+0x10/0x10 [ 27.783176][ T374] __fput+0x1fd/0x8f0 [ 27.787138][ T374] ____fput+0x15/0x20 [ 27.791098][ T374] task_work_run+0x1e1/0x250 [ 27.795675][ T374] ? __cfi_task_work_run+0x10/0x10 [ 27.800764][ T374] ? __cfi___close_range+0x10/0x10 [ 27.805853][ T374] exit_to_user_mode_loop+0x9b/0xb0 [ 27.811028][ T374] exit_to_user_mode_prepare+0x87/0xd0 [ 27.816464][ T374] syscall_exit_to_user_mode+0x1a/0x30 [ 27.821895][ T374] do_syscall_64+0x58/0xa0 [ 27.826291][ T374] ? clear_bhb_loop+0x30/0x80 [ 27.830939][ T374] ? clear_bhb_loop+0x30/0x80 [ 27.835589][ T374] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 27.841460][ T374] RIP: 0033:0x7f68ddb9ce59 [ 27.845861][ 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 [ 27.865463][ T374] RSP: 002b:00007ffd4232b658 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 27.873870][ T374] RAX: 0000000000000000 RBX: 00007ffd4232b740 RCX: 00007f68ddb9ce59 [ 27.881825][ T374] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 27.889782][ T374] RBP: 0000000000006be2 R08: 0000000000000001 R09: 0000000000000000 [ 27.897741][ T374] R10: 0000001b33120000 R11: 0000000000000246 R12: 0000000000000000 [ 27.905702][ T374] R13: 00007f68dde15fac R14: 00007f68dde15fa8 R15: 00007f68dde15fa0 [ 27.913663][ T374] [ 27.916663][ T374] [ 27.918967][ T374] Allocated by task 374: [ 27.923185][ T374] kasan_set_track+0x4b/0x70 [ 27.927754][ T374] kasan_save_alloc_info+0x1f/0x30 [ 27.932846][ T374] __kasan_kmalloc+0x95/0xb0 [ 27.937422][ T374] __kmalloc+0xb4/0x1e0 [ 27.941567][ T374] l2tp_session_create+0x38/0xbd0 [ 27.946585][ T374] pppol2tp_connect+0xbf5/0x1640 [ 27.951518][ T374] __sys_connect+0x3da/0x460 [ 27.956090][ T374] __x64_sys_connect+0x7a/0x90 [ 27.960831][ T374] x64_sys_call+0x88d/0x9a0 [ 27.965325][ T374] do_syscall_64+0x4c/0xa0 [ 27.969738][ T374] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 27.975627][ T374] [ 27.977957][ T374] Freed by task 324: [ 27.981825][ T374] kasan_set_track+0x4b/0x70 [ 27.986398][ T374] kasan_save_free_info+0x2b/0x40 [ 27.991399][ T374] ____kasan_slab_free+0x132/0x180 [ 27.996486][ T374] __kasan_slab_free+0x11/0x20 [ 28.001225][ T374] slab_free_freelist_hook+0xc2/0x190 [ 28.006573][ T374] __kmem_cache_free+0xb7/0x1b0 [ 28.011410][ T374] kfree+0x6f/0xf0 [ 28.015101][ T374] l2tp_session_put+0xaf/0x1a0 [ 28.019837][ T374] l2tp_session_delete+0x3df/0x4d0 [ 28.024917][ T374] l2tp_tunnel_del_work+0x199/0x410 [ 28.030088][ T374] process_one_work+0x717/0xc30 [ 28.034914][ T374] worker_thread+0xa4d/0x11d0 [ 28.039563][ T374] kthread+0x281/0x320 [ 28.043601][ T374] ret_from_fork+0x1f/0x30 [ 28.047995][ T374] [ 28.050303][ T374] Last potentially related work creation: [ 28.056013][ T374] kasan_save_stack+0x3a/0x60 [ 28.060677][ T374] __kasan_record_aux_stack+0xb6/0xc0 [ 28.066029][ T374] kasan_record_aux_stack_noalloc+0xb/0x10 [ 28.071821][ T374] call_rcu+0xcf/0xf50 [ 28.075878][ T374] pppol2tp_release+0x1e3/0x2b0 [ 28.080713][ T374] sock_close+0xc9/0x220 [ 28.084937][ T374] __fput+0x1fd/0x8f0 [ 28.088898][ T374] ____fput+0x15/0x20 [ 28.092865][ T374] task_work_run+0x1e1/0x250 [ 28.097434][ T374] exit_to_user_mode_loop+0x9b/0xb0 [ 28.102612][ T374] exit_to_user_mode_prepare+0x87/0xd0 [ 28.108064][ T374] syscall_exit_to_user_mode+0x1a/0x30 [ 28.113503][ T374] do_syscall_64+0x58/0xa0 [ 28.117902][ T374] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 28.123778][ T374] [ 28.126083][ T374] The buggy address belongs to the object at ffff88812a7cc400 [ 28.126083][ T374] which belongs to the cache kmalloc-512 of size 512 [ 28.140128][ T374] The buggy address is located 400 bytes inside of [ 28.140128][ T374] 512-byte region [ffff88812a7cc400, ffff88812a7cc600) [ 28.153384][ T374] [ 28.155688][ T374] The buggy address belongs to the physical page: [ 28.162087][ T374] page:ffffea0004a9f300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12a7cc [ 28.172311][ T374] head:ffffea0004a9f300 order:2 compound_mapcount:0 compound_pincount:0 [ 28.180623][ T374] flags: 0x4000000000010200(slab|head|zone=1) [ 28.186698][ T374] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00 [ 28.195278][ T374] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 28.203847][ T374] page dumped because: kasan: bad access detected [ 28.210246][ T374] page_owner tracks the page as allocated [ 28.215937][ T374] page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 60, tgid 60 (kworker/1:2), ts 27631292343, free_ts 27001838469 [ 28.237717][ T374] post_alloc_hook+0x1f5/0x210 [ 28.242475][ T374] prep_new_page+0x1c/0x110 [ 28.246958][ T374] get_page_from_freelist+0x2ca9/0x2d20 [ 28.252495][ T374] __alloc_pages+0x1fa/0x610 [ 28.257067][ T374] alloc_slab_page+0x6e/0xf0 [ 28.261655][ T374] new_slab+0x98/0x3e0 [ 28.265701][ T374] ___slab_alloc+0x70f/0xb70 [ 28.270284][ T374] __slab_alloc+0x5e/0xa0 [ 28.274604][ T374] __kmem_cache_alloc_node+0x204/0x2d0 [ 28.280044][ T374] __kmalloc_node_track_caller+0xa1/0x1e0 [ 28.285751][ T374] __alloc_skb+0x226/0x4a0 [ 28.290149][ T374] __ipv6_ifa_notify+0x200/0xe80 [ 28.295065][ T374] addrconf_dad_completed+0x192/0xe80 [ 28.300425][ T374] addrconf_dad_work+0xc1b/0x14a0 [ 28.305427][ T374] process_one_work+0x717/0xc30 [ 28.310255][ T374] worker_thread+0xa4d/0x11d0 [ 28.314999][ T374] page last free stack trace: [ 28.319649][ T374] free_unref_page_prepare+0x80c/0x820 [ 28.325092][ T374] free_unref_page+0x93/0x530 [ 28.329750][ T374] __free_pages+0x67/0x100 [ 28.334152][ T374] __vunmap+0xa3c/0xc00 [ 28.338287][ T374] vfree+0x61/0x90 [ 28.341986][ T374] kcov_close+0x2b/0x50 [ 28.346128][ T374] __fput+0x1fd/0x8f0 [ 28.350128][ T374] ____fput+0x15/0x20 [ 28.354102][ T374] task_work_run+0x1e1/0x250 [ 28.358683][ T374] do_exit+0xa7c/0x27c0 [ 28.362838][ T374] do_group_exit+0x21b/0x2e0 [ 28.367500][ T374] get_signal+0x1382/0x14f0 [ 28.372003][ T374] arch_do_signal_or_restart+0xd1/0x11c0 [ 28.377623][ T374] exit_to_user_mode_loop+0x7a/0xb0 [ 28.382802][ T374] exit_to_user_mode_prepare+0x87/0xd0 [ 28.388244][ T374] syscall_exit_to_user_mode+0x1a/0x30 [ 28.393684][ T374] [ 28.396014][ T374] Memory state around the buggy address: [ 28.401619][ T374] ffff88812a7cc480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.409658][ T374] ffff88812a7cc500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.417699][ T374] >ffff88812a7cc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.425734][ T374] ^ [ 28.430301][ T374] ffff88812a7cc600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.438340][ T374] ffff88812a7cc680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.446377][ T374] ================================================================== [ 28.454409][ T374] Disabling lock debugging due to kernel taint