Warning: Permanently added '10.128.0.172' (ED25519) to the list of known hosts. 2026/08/18 22:31:07 parsed 1 programs 2026/08/18 22:31:07 serving rpc on tcp://34805 [ 23.059904][ T24] audit: type=1400 audit(1787092267.300:64): 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 [ 23.085736][ T24] audit: type=1400 audit(1787092267.300:65): 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 [ 23.106893][ T24] audit: type=1400 audit(1787092267.300:66): 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 [ 23.697041][ T24] audit: type=1400 audit(1787092267.940:67): 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 [ 23.698112][ T293] cgroup: Unknown subsys name 'net' [ 23.721419][ T24] audit: type=1400 audit(1787092267.940:68): 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 [ 23.752249][ T24] audit: type=1400 audit(1787092267.980:69): 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 [ 23.752503][ T293] cgroup: Unknown subsys name 'devices' [ 23.874239][ T293] cgroup: Unknown subsys name 'hugetlb' [ 23.882246][ T293] cgroup: Unknown subsys name 'rlimit' [ 23.964876][ T24] audit: type=1400 audit(1787092268.210:70): 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 [ 23.990813][ T24] audit: type=1400 audit(1787092268.210:71): 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 [ 23.991294][ T297] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 24.012872][ T24] audit: type=1400 audit(1787092268.210:72): 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 [ 24.045085][ T24] audit: type=1400 audit(1787092268.210:73): 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 [ 24.067673][ T293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 24.444753][ T300] request_module fs-gadgetfs succeeded, but still no fs? [ 24.455581][ T300] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 24.610623][ T309] bridge0: port 1(bridge_slave_0) entered blocking state [ 24.618702][ T309] bridge0: port 1(bridge_slave_0) entered disabled state [ 24.626544][ T309] device bridge_slave_0 entered promiscuous mode [ 24.634478][ T309] bridge0: port 2(bridge_slave_1) entered blocking state [ 24.641983][ T309] bridge0: port 2(bridge_slave_1) entered disabled state [ 24.650729][ T309] device bridge_slave_1 entered promiscuous mode [ 24.684764][ T309] bridge0: port 2(bridge_slave_1) entered blocking state [ 24.692297][ T309] bridge0: port 2(bridge_slave_1) entered forwarding state [ 24.700321][ T309] bridge0: port 1(bridge_slave_0) entered blocking state [ 24.707759][ T309] bridge0: port 1(bridge_slave_0) entered forwarding state [ 24.724127][ T310] bridge0: port 1(bridge_slave_0) entered disabled state [ 24.732197][ T310] bridge0: port 2(bridge_slave_1) entered disabled state [ 24.740282][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 24.748457][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 24.759081][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 24.767348][ T310] bridge0: port 1(bridge_slave_0) entered blocking state [ 24.775279][ T310] bridge0: port 1(bridge_slave_0) entered forwarding state [ 24.784194][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 24.792763][ T310] bridge0: port 2(bridge_slave_1) entered blocking state [ 24.800294][ T310] bridge0: port 2(bridge_slave_1) entered forwarding state [ 24.812767][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 24.823279][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 24.836995][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 24.848233][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 24.856669][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 24.865557][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 24.874590][ T309] device veth0_vlan entered promiscuous mode [ 24.886008][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 24.894950][ T309] device veth1_macvtap entered promiscuous mode [ 24.904666][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 24.916771][ T310] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/08/18 22:31:09 executed programs: 0 [ 25.570493][ T49] device bridge_slave_1 left promiscuous mode [ 25.577028][ T49] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.584804][ T49] device bridge_slave_0 left promiscuous mode [ 25.592032][ T49] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.600235][ T49] device veth1_macvtap left promiscuous mode [ 25.606515][ T49] device veth0_vlan left promiscuous mode [ 25.737875][ T366] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.745586][ T366] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.753271][ T366] device bridge_slave_0 entered promiscuous mode [ 25.760377][ T366] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.768076][ T366] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.775977][ T366] device bridge_slave_1 entered promiscuous mode [ 25.818062][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 25.827421][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.837678][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 25.846816][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 25.856700][ T9] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.864470][ T9] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.874072][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 25.882616][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 25.891361][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 25.901676][ T9] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.909501][ T9] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.923959][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 25.934634][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 25.953375][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 25.964707][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 25.973912][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 25.982301][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 25.991388][ T366] device veth0_vlan entered promiscuous mode [ 26.001134][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.011983][ T366] device veth1_macvtap entered promiscuous mode [ 26.021178][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.031448][ T9] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.052960][ T377] ================================================================== [ 26.061340][ T377] BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 [ 26.068820][ T377] Write of size 8 at addr ffff888110ed9150 by task syz.2.17/377 [ 26.076786][ T377] [ 26.079221][ T377] CPU: 0 PID: 377 Comm: syz.2.17 Not tainted syzkaller #0 [ 26.086671][ T377] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 26.097357][ T377] Call Trace: [ 26.100631][ T377] __dump_stack+0x21/0x24 [ 26.105729][ T377] dump_stack_lvl+0x1a7/0x208 [ 26.110942][ T377] ? show_regs_print_info+0x18/0x18 [ 26.116295][ T377] ? thaw_kernel_threads+0x220/0x220 [ 26.122120][ T377] ? debug_smp_processor_id+0x17/0x20 [ 26.127658][ T377] print_address_description+0x7f/0x2c0 [ 26.134179][ T377] ? mutex_lock+0x85/0xf0 [ 26.138799][ T377] kasan_report+0x100/0x140 [ 26.143647][ T377] ? mutex_lock+0x85/0xf0 [ 26.148303][ T377] kasan_check_range+0x249/0x2a0 [ 26.154179][ T377] __kasan_check_write+0x14/0x20 [ 26.159214][ T377] mutex_lock+0x85/0xf0 [ 26.163357][ T377] ? mutex_trylock+0xb0/0xb0 [ 26.169010][ T377] ? l2tp_session_put+0xb2/0x1a0 [ 26.174563][ T377] ? l2tp_session_delete+0x3a9/0x4a0 [ 26.179927][ T377] pppol2tp_release+0x178/0x2b0 [ 26.184957][ T377] sock_close+0xb8/0x200 [ 26.189312][ T377] ? sock_mmap+0xa0/0xa0 [ 26.193754][ T377] __fput+0x2dc/0x730 [ 26.198088][ T377] ____fput+0x15/0x20 [ 26.202206][ T377] task_work_run+0x127/0x190 [ 26.207129][ T377] exit_to_user_mode_loop+0xcb/0xe0 [ 26.212582][ T377] exit_to_user_mode_prepare+0x76/0xa0 [ 26.218308][ T377] syscall_exit_to_user_mode+0x1d/0x40 [ 26.223898][ T377] do_syscall_64+0x3d/0x40 [ 26.228471][ T377] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 26.234528][ T377] RIP: 0033:0x7fc7470000d9 [ 26.238923][ T377] 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 [ 26.258772][ T377] RSP: 002b:00007ffed43979e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 26.267547][ T377] RAX: 0000000000000000 RBX: 00007ffed4397ad0 RCX: 00007fc7470000d9 [ 26.275971][ T377] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 26.283932][ T377] RBP: 00000000000065a3 R08: 0000000000000001 R09: 0000000000000000 [ 26.292160][ T377] R10: 0000001b32d20000 R11: 0000000000000246 R12: 0000000000000000 [ 26.300621][ T377] R13: 00007fc747287fac R14: 00007fc747287fa8 R15: 00007fc747287fa0 [ 26.309351][ T377] [ 26.311764][ T377] Allocated by task 377: [ 26.316168][ T377] __kasan_kmalloc+0xd4/0x100 [ 26.320927][ T377] __kmalloc+0x19f/0x330 [ 26.325416][ T377] l2tp_session_create+0x39/0xb60 [ 26.330513][ T377] pppol2tp_connect+0xbf5/0x1640 [ 26.335945][ T377] __sys_connect+0x3ce/0x450 [ 26.340867][ T377] __x64_sys_connect+0x7a/0x90 [ 26.345701][ T377] do_syscall_64+0x31/0x40 [ 26.350480][ T377] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 26.358264][ T377] [ 26.360763][ T377] Freed by task 377: [ 26.365054][ T377] kasan_set_track+0x4a/0x70 [ 26.370529][ T377] kasan_set_free_info+0x23/0x40 [ 26.376022][ T377] ____kasan_slab_free+0x125/0x160 [ 26.382087][ T377] __kasan_slab_free+0x11/0x20 [ 26.387780][ T377] slab_free_freelist_hook+0xc5/0x190 [ 26.393336][ T377] kfree+0xc0/0x270 [ 26.397681][ T377] l2tp_session_put+0xb2/0x1a0 [ 26.403336][ T377] l2tp_session_delete+0x3a9/0x4a0 [ 26.409091][ T377] pppol2tp_release+0x169/0x2b0 [ 26.414505][ T377] sock_close+0xb8/0x200 [ 26.418829][ T377] __fput+0x2dc/0x730 [ 26.423182][ T377] ____fput+0x15/0x20 [ 26.427142][ T377] task_work_run+0x127/0x190 [ 26.432358][ T377] exit_to_user_mode_loop+0xcb/0xe0 [ 26.437974][ T377] exit_to_user_mode_prepare+0x76/0xa0 [ 26.443594][ T377] syscall_exit_to_user_mode+0x1d/0x40 [ 26.449210][ T377] do_syscall_64+0x3d/0x40 [ 26.453755][ T377] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 26.460026][ T377] [ 26.463467][ T377] The buggy address belongs to the object at ffff888110ed9000 [ 26.463467][ T377] which belongs to the cache kmalloc-512 of size 512 [ 26.478775][ T377] The buggy address is located 336 bytes inside of [ 26.478775][ T377] 512-byte region [ffff888110ed9000, ffff888110ed9200) [ 26.493018][ T377] The buggy address belongs to the page: [ 26.498970][ T377] page:ffffea000443b600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110ed8 [ 26.511275][ T377] head:ffffea000443b600 order:2 compound_mapcount:0 compound_pincount:0 [ 26.521923][ T377] flags: 0x4000000000010200(slab|head) [ 26.527548][ T377] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 [ 26.537997][ T377] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 26.547310][ T377] page dumped because: kasan: bad access detected [ 26.554363][ T377] page_owner tracks the page as allocated [ 26.560965][ T377] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 105, ts 5678520428, free_ts 0 [ 26.584548][ T377] prep_new_page+0x176/0x190 [ 26.589848][ T377] get_page_from_freelist+0x225f/0x23f0 [ 26.596019][ T377] __alloc_pages_nodemask+0x29a/0x640 [ 26.601815][ T377] new_slab+0x84/0x3f0 [ 26.606080][ T377] ___slab_alloc+0x2f8/0x4c0 [ 26.610819][ T377] __slab_alloc+0x63/0xa0 [ 26.615568][ T377] __kmalloc_track_caller+0x1e4/0x310 [ 26.621212][ T377] __alloc_skb+0xdc/0x520 [ 26.625762][ T377] alloc_skb_with_frags+0xa3/0x560 [ 26.630890][ T377] sock_alloc_send_pskb+0x87f/0x9a0 [ 26.636276][ T377] unix_dgram_sendmsg+0x6f3/0x18f0 [ 26.641884][ T377] sock_write_iter+0x2a6/0x3a0 [ 26.646734][ T377] vfs_write+0x770/0xd70 [ 26.651178][ T377] ksys_write+0x14a/0x260 [ 26.655665][ T377] __x64_sys_write+0x7b/0x90 [ 26.660642][ T377] do_syscall_64+0x31/0x40 [ 26.665213][ T377] page_owner free stack trace missing [ 26.671172][ T377] [ 26.673504][ T377] Memory state around the buggy address: [ 26.679818][ T377] ffff888110ed9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.688309][ T377] ffff888110ed9080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.696887][ T377] >ffff888110ed9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.705396][ T377] ^ [ 26.712932][ T377] ffff888110ed9180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.722471][ T377] ffff888110ed9200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.730928][ T377] ================================================================== [ 26.739315][ T377] Disabling lock debugging due to kernel taint