rocess permissive=1 [ 14.438619][ T24] audit: type=1400 audit(1782165280.770:63): avc: denied { siginh } for pid=217 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.223' (ED25519) to the list of known hosts. 2026/06/22 21:54:50 parsed 1 programs 2026/06/22 21:54:50 serving rpc on tcp://42743 [ 24.065066][ T24] audit: type=1400 audit(1782165290.470:64): 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 [ 24.086745][ T24] audit: type=1400 audit(1782165290.470:65): 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 [ 24.107246][ T24] audit: type=1400 audit(1782165290.470:66): 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 [ 24.739664][ T24] audit: type=1400 audit(1782165291.140:67): 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 [ 24.740659][ T293] cgroup: Unknown subsys name 'net' [ 24.763086][ T24] audit: type=1400 audit(1782165291.140:68): 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 [ 24.791465][ T24] audit: type=1400 audit(1782165291.170:69): 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 [ 24.791621][ T293] cgroup: Unknown subsys name 'devices' [ 24.902532][ T293] cgroup: Unknown subsys name 'hugetlb' [ 24.908751][ T293] cgroup: Unknown subsys name 'rlimit' [ 25.110559][ T24] audit: type=1400 audit(1782165291.510:70): 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 [ 25.135980][ T24] audit: type=1400 audit(1782165291.510:71): 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 [ 25.139786][ T298] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 25.158189][ T24] audit: type=1400 audit(1782165291.510:72): 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 [ 25.189577][ T24] audit: type=1400 audit(1782165291.510:73): 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 [ 25.210897][ T293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 25.697011][ T300] request_module fs-gadgetfs succeeded, but still no fs? [ 25.707032][ T300] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 26.236199][ T350] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.244750][ T350] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.252526][ T350] device bridge_slave_0 entered promiscuous mode [ 26.259880][ T350] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.267605][ T350] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.275222][ T350] device bridge_slave_1 entered promiscuous mode [ 26.314243][ T350] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.321716][ T350] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.329498][ T350] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.336657][ T350] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.360032][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.367961][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.375612][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 26.383642][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.396398][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.404834][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.412145][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.421446][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.430195][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.437649][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.452971][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.462090][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.475808][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.490138][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.498952][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.509074][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.518545][ T350] device veth0_vlan entered promiscuous mode [ 26.534430][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.543555][ T350] device veth1_macvtap entered promiscuous mode [ 26.553282][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.564953][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/06/22 21:54:53 executed programs: 0 [ 26.838522][ T378] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.846555][ T378] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.854791][ T378] device bridge_slave_0 entered promiscuous mode [ 26.864399][ T378] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.871645][ T378] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.879536][ T378] device bridge_slave_1 entered promiscuous mode [ 26.916824][ T378] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.924299][ T378] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.932363][ T378] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.940158][ T378] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.957248][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.965505][ T49] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.974307][ T49] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.988520][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.996885][ T49] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.004109][ T49] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.015152][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.023432][ T49] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.030629][ T49] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.045798][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.056761][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.074652][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.086174][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.094870][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.104276][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.117299][ T378] device veth0_vlan entered promiscuous mode [ 27.127252][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.137158][ T378] device veth1_macvtap entered promiscuous mode [ 27.146626][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.158201][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.182674][ T389] ================================================================== [ 27.191086][ T389] BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 [ 27.198513][ T389] Write of size 8 at addr ffff88810fac2550 by task syz.2.17/389 [ 27.207832][ T389] [ 27.210352][ T389] CPU: 1 PID: 389 Comm: syz.2.17 Not tainted syzkaller #0 [ 27.218603][ T389] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 27.229215][ T389] Call Trace: [ 27.232864][ T389] __dump_stack+0x21/0x24 [ 27.238017][ T389] dump_stack_lvl+0x1a7/0x208 [ 27.243279][ T389] ? show_regs_print_info+0x18/0x18 [ 27.248781][ T389] ? thaw_kernel_threads+0x220/0x220 [ 27.254458][ T389] ? debug_smp_processor_id+0x17/0x20 [ 27.260464][ T389] print_address_description+0x7f/0x2c0 [ 27.266643][ T389] ? mutex_lock+0x85/0xf0 [ 27.271094][ T389] kasan_report+0x100/0x140 [ 27.276087][ T389] ? mutex_lock+0x85/0xf0 [ 27.280456][ T389] kasan_check_range+0x249/0x2a0 [ 27.285713][ T389] __kasan_check_write+0x14/0x20 [ 27.290848][ T389] mutex_lock+0x85/0xf0 [ 27.295187][ T389] ? mutex_trylock+0xb0/0xb0 [ 27.299873][ T389] ? l2tp_session_put+0xb2/0x1a0 [ 27.305066][ T389] ? l2tp_session_delete+0x3a9/0x4a0 [ 27.310349][ T389] pppol2tp_release+0x178/0x2b0 [ 27.315433][ T389] sock_close+0xb8/0x200 [ 27.320051][ T389] ? sock_mmap+0xa0/0xa0 [ 27.326048][ T389] __fput+0x2dc/0x730 [ 27.330220][ T389] ____fput+0x15/0x20 [ 27.334394][ T389] task_work_run+0x127/0x190 [ 27.339553][ T389] exit_to_user_mode_loop+0xcb/0xe0 [ 27.345793][ T389] exit_to_user_mode_prepare+0x76/0xa0 [ 27.351648][ T389] syscall_exit_to_user_mode+0x1d/0x40 [ 27.358391][ T389] do_syscall_64+0x3d/0x40 [ 27.363752][ T389] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 27.370535][ T389] RIP: 0033:0x7f7bde80de59 [ 27.375442][ T389] 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 [ 27.399540][ T389] RSP: 002b:00007ffcbb6ce318 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 27.409221][ T389] RAX: 0000000000000000 RBX: 00007ffcbb6ce400 RCX: 00007f7bde80de59 [ 27.418415][ T389] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 27.427168][ T389] RBP: 0000000000006a17 R08: 0000000000000001 R09: 0000000000000000 [ 27.437219][ T389] R10: 0000001b33820000 R11: 0000000000000246 R12: 0000000000000000 [ 27.447692][ T389] R13: 00007f7bdea86fac R14: 00007f7bdea86fa8 R15: 00007f7bdea86fa0 [ 27.456330][ T389] [ 27.459193][ T389] Allocated by task 389: [ 27.463633][ T389] __kasan_kmalloc+0xd4/0x100 [ 27.468441][ T389] __kmalloc+0x19f/0x330 [ 27.473460][ T389] l2tp_session_create+0x39/0xb60 [ 27.479675][ T389] pppol2tp_connect+0xbf5/0x1640 [ 27.485192][ T389] __sys_connect+0x3ce/0x450 [ 27.490511][ T389] __x64_sys_connect+0x7a/0x90 [ 27.495903][ T389] do_syscall_64+0x31/0x40 [ 27.500406][ T389] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 27.506468][ T389] [ 27.508965][ T389] Freed by task 389: [ 27.513474][ T389] kasan_set_track+0x4a/0x70 [ 27.518338][ T389] kasan_set_free_info+0x23/0x40 [ 27.523589][ T389] ____kasan_slab_free+0x125/0x160 [ 27.528986][ T389] __kasan_slab_free+0x11/0x20 [ 27.533861][ T389] slab_free_freelist_hook+0xc5/0x190 [ 27.539415][ T389] kfree+0xc0/0x270 [ 27.543423][ T389] l2tp_session_put+0xb2/0x1a0 [ 27.548628][ T389] l2tp_session_delete+0x3a9/0x4a0 [ 27.554309][ T389] pppol2tp_release+0x169/0x2b0 [ 27.559352][ T389] sock_close+0xb8/0x200 [ 27.563686][ T389] __fput+0x2dc/0x730 [ 27.567655][ T389] ____fput+0x15/0x20 [ 27.571816][ T389] task_work_run+0x127/0x190 [ 27.576838][ T389] exit_to_user_mode_loop+0xcb/0xe0 [ 27.583141][ T389] exit_to_user_mode_prepare+0x76/0xa0 [ 27.588968][ T389] syscall_exit_to_user_mode+0x1d/0x40 [ 27.594443][ T389] do_syscall_64+0x3d/0x40 [ 27.598844][ T389] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 27.606458][ T389] [ 27.609222][ T389] The buggy address belongs to the object at ffff88810fac2400 [ 27.609222][ T389] which belongs to the cache kmalloc-512 of size 512 [ 27.624472][ T389] The buggy address is located 336 bytes inside of [ 27.624472][ T389] 512-byte region [ffff88810fac2400, ffff88810fac2600) [ 27.638277][ T389] The buggy address belongs to the page: [ 27.644700][ T389] page:ffffea00043eb000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fac0 [ 27.657803][ T389] head:ffffea00043eb000 order:2 compound_mapcount:0 compound_pincount:0 [ 27.667512][ T389] flags: 0x4000000000010200(slab|head) [ 27.672971][ T389] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 [ 27.681551][ T389] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 27.690153][ T389] page dumped because: kasan: bad access detected [ 27.696656][ T389] page_owner tracks the page as allocated [ 27.702394][ T389] page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 354, ts 27181085064, free_ts 27172009944 [ 27.724729][ T389] prep_new_page+0x176/0x190 [ 27.729466][ T389] get_page_from_freelist+0x225f/0x23f0 [ 27.735204][ T389] __alloc_pages_nodemask+0x29a/0x640 [ 27.740957][ T389] new_slab+0x84/0x3f0 [ 27.745440][ T389] ___slab_alloc+0x2f8/0x4c0 [ 27.750219][ T389] __slab_alloc+0x63/0xa0 [ 27.755079][ T389] __kmalloc_track_caller+0x1e4/0x310 [ 27.760527][ T389] __alloc_skb+0xdc/0x520 [ 27.765037][ T389] ndisc_send_ns+0x347/0xb10 [ 27.769937][ T389] addrconf_dad_work+0xa40/0x1480 [ 27.774971][ T389] process_one_work+0x6fd/0xbc0 [ 27.780473][ T389] worker_thread+0xa8e/0x13c0 [ 27.786609][ T389] kthread+0x324/0x3b0 [ 27.790807][ T389] ret_from_fork+0x1f/0x30 [ 27.795592][ T389] page last free stack trace: [ 27.800595][ T389] __free_pages_ok+0x80b/0x830 [ 27.806369][ T389] __free_pages+0xd8/0x390 [ 27.811422][ T389] __free_slab+0xcf/0x190 [ 27.816064][ T389] unfreeze_partials+0x150/0x180 [ 27.821181][ T389] put_cpu_partial+0xc1/0x180 [ 27.825864][ T389] __slab_free+0x2c9/0x3a0 [ 27.830286][ T389] ___cache_free+0x10e/0x130 [ 27.835049][ T389] qlink_free+0x50/0x90 [ 27.839550][ T389] qlist_free_all+0x5f/0xb0 [ 27.844486][ T389] kasan_quarantine_reduce+0x14a/0x160 [ 27.851189][ T389] __kasan_slab_alloc+0x2f/0xe0 [ 27.857045][ T389] slab_post_alloc_hook+0x5d/0x2f0 [ 27.862869][ T389] kmem_cache_alloc+0x15a/0x2d0 [ 27.868265][ T389] __alloc_skb+0x9e/0x520 [ 27.872785][ T389] netlink_ack+0x35c/0xb30 [ 27.877398][ T389] netlink_rcv_skb+0x267/0x430 [ 27.882335][ T389] [ 27.884826][ T389] Memory state around the buggy address: [ 27.890489][ T389] ffff88810fac2400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.899344][ T389] ffff88810fac2480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.907603][ T389] >ffff88810fac2500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.915657][ T389] ^ [ 27.922817][ T389] ffff88810fac2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.931260][ T389] ffff88810fac2600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.939884][ T389] ================================================================== [ 27.948374][ T389] Disabling lock debugging due to kernel taint