rocess permissive=1 [ 14.868460][ T28] audit: type=1400 audit(1782654810.802:63): 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 '10.128.0.228' (ED25519) to the list of known hosts. 2026/06/28 13:53:41 parsed 1 programs 2026/06/28 13:53:41 serving rpc on tcp://41319 [ 25.091874][ T28] audit: type=1400 audit(1782654821.032:64): 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 [ 25.112632][ T28] audit: type=1400 audit(1782654821.042:65): 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 [ 26.218747][ T28] audit: type=1400 audit(1782654822.162:66): 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 [ 26.222358][ T301] cgroup: Unknown subsys name 'net' [ 26.246668][ T28] audit: type=1400 audit(1782654822.162:67): 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 [ 26.268914][ T28] audit: type=1400 audit(1782654822.192:68): 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 [ 26.268996][ T301] cgroup: Unknown subsys name 'devices' [ 26.414303][ T301] cgroup: Unknown subsys name 'hugetlb' [ 26.419963][ T301] cgroup: Unknown subsys name 'rlimit' [ 26.533352][ T28] audit: type=1400 audit(1782654822.482:69): 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 [ 26.556598][ T28] audit: type=1400 audit(1782654822.482:70): 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 [ 26.577051][ T28] audit: type=1400 audit(1782654822.482:71): 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 [ 26.597407][ T28] audit: type=1400 audit(1782654822.482:72): 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 [ 26.617656][ T28] audit: type=1400 audit(1782654822.482:73): 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 [ 26.625733][ T304] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 26.674464][ T301] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 27.343301][ T308] request_module fs-gadgetfs succeeded, but still no fs? [ 27.474619][ T317] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.481678][ T317] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.489289][ T317] device bridge_slave_0 entered promiscuous mode [ 27.497185][ T317] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.504274][ T317] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.511678][ T317] device bridge_slave_1 entered promiscuous mode [ 27.558956][ T317] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.566016][ T317] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.573342][ T317] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.580383][ T317] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.601411][ T318] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.608803][ T318] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.616659][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 27.624261][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.634883][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 27.643140][ T318] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.650171][ T318] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.659158][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.667449][ T318] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.674547][ T318] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.688421][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.697868][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.712450][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.724077][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.733002][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.740417][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.749357][ T317] device veth0_vlan entered promiscuous mode [ 27.759889][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.769101][ T317] device veth1_macvtap entered promiscuous mode [ 27.778802][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.789002][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.826430][ T317] syz-executor (317) used greatest stack depth: 21856 bytes left [ 28.423078][ T8] device bridge_slave_1 left promiscuous mode [ 28.429254][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.444472][ T8] device bridge_slave_0 left promiscuous mode [ 28.450682][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.459103][ T8] device veth1_macvtap left promiscuous mode [ 28.465281][ T8] device veth0_vlan left promiscuous mode 2026/06/28 13:53:44 executed programs: 0 [ 28.868493][ T371] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.876060][ T371] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.883744][ T371] device bridge_slave_0 entered promiscuous mode [ 28.890633][ T371] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.897828][ T371] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.905260][ T371] device bridge_slave_1 entered promiscuous mode [ 28.950412][ T371] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.957748][ T371] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.965058][ T371] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.972120][ T371] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.992412][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 29.000086][ T318] bridge0: port 1(bridge_slave_0) entered disabled state [ 29.007418][ T318] bridge0: port 2(bridge_slave_1) entered disabled state [ 29.016875][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 29.025094][ T318] bridge0: port 1(bridge_slave_0) entered blocking state [ 29.032145][ T318] bridge0: port 1(bridge_slave_0) entered forwarding state [ 29.040836][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 29.049225][ T318] bridge0: port 2(bridge_slave_1) entered blocking state [ 29.056323][ T318] bridge0: port 2(bridge_slave_1) entered forwarding state [ 29.068713][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 29.078081][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 29.092515][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 29.104620][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 29.112940][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 29.120404][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 29.128749][ T371] device veth0_vlan entered promiscuous mode [ 29.139300][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 29.148437][ T371] device veth1_macvtap entered promiscuous mode [ 29.158170][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 29.168161][ T318] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 29.195804][ T375] ================================================================== [ 29.203905][ T375] BUG: KASAN: use-after-free in mutex_lock+0x86/0x1b0 [ 29.210688][ T375] Write of size 8 at addr ffff888121758d50 by task syz.2.17/375 [ 29.218317][ T375] [ 29.220644][ T375] CPU: 1 PID: 375 Comm: syz.2.17 Not tainted syzkaller #0 [ 29.227747][ T375] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 29.237810][ T375] Call Trace: [ 29.241093][ T375] [ 29.244025][ T375] __dump_stack+0x21/0x24 [ 29.248359][ T375] dump_stack_lvl+0x110/0x170 [ 29.253043][ T375] ? __cfi_dump_stack_lvl+0x8/0x8 [ 29.258098][ T375] ? mutex_lock+0x86/0x1b0 [ 29.262519][ T375] print_address_description+0x71/0x200 [ 29.268068][ T375] print_report+0x4a/0x60 [ 29.272409][ T375] kasan_report+0x122/0x150 [ 29.276917][ T375] ? mutex_lock+0x86/0x1b0 [ 29.281339][ T375] kasan_check_range+0x249/0x2a0 [ 29.286293][ T375] __kasan_check_write+0x14/0x20 [ 29.291230][ T375] mutex_lock+0x86/0x1b0 [ 29.295474][ T375] ? __cfi_mutex_lock+0x10/0x10 [ 29.300328][ T375] ? kfree+0x6f/0xf0 [ 29.304225][ T375] ? l2tp_session_put+0xaf/0x1a0 [ 29.309167][ T375] ? l2tp_session_delete+0x3df/0x4d0 [ 29.314456][ T375] pppol2tp_release+0x178/0x2b0 [ 29.319309][ T375] sock_close+0xc9/0x220 [ 29.323553][ T375] ? __cfi_sock_close+0x10/0x10 [ 29.328410][ T375] __fput+0x1fd/0x8f0 [ 29.332394][ T375] ____fput+0x15/0x20 [ 29.336377][ T375] task_work_run+0x1e1/0x250 [ 29.340973][ T375] ? __cfi_task_work_run+0x10/0x10 [ 29.346090][ T375] ? __cfi___close_range+0x10/0x10 [ 29.351208][ T375] exit_to_user_mode_loop+0x9b/0xb0 [ 29.356409][ T375] exit_to_user_mode_prepare+0x87/0xd0 [ 29.361881][ T375] syscall_exit_to_user_mode+0x1a/0x30 [ 29.367341][ T375] do_syscall_64+0x58/0xa0 [ 29.371759][ T375] ? clear_bhb_loop+0x30/0x80 [ 29.376437][ T375] ? clear_bhb_loop+0x30/0x80 [ 29.381113][ T375] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 29.387014][ T375] RIP: 0033:0x7fee0f79ce59 [ 29.391439][ T375] 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 [ 29.411073][ T375] RSP: 002b:00007ffda5f7e678 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 29.419501][ T375] RAX: 0000000000000000 RBX: 00007ffda5f7e760 RCX: 00007fee0f79ce59 [ 29.427489][ T375] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 29.435470][ T375] RBP: 00000000000071e8 R08: 0000000000000001 R09: 0000000000000000 [ 29.443449][ T375] R10: 0000001b33220000 R11: 0000000000000246 R12: 0000000000000000 [ 29.451428][ T375] R13: 00007fee0fa15fac R14: 00007fee0fa15fa8 R15: 00007fee0fa15fa0 [ 29.459435][ T375] [ 29.462456][ T375] [ 29.464777][ T375] Allocated by task 375: [ 29.469027][ T375] kasan_set_track+0x4b/0x70 [ 29.473626][ T375] kasan_save_alloc_info+0x1f/0x30 [ 29.478738][ T375] __kasan_kmalloc+0x95/0xb0 [ 29.483336][ T375] __kmalloc+0xb4/0x1e0 [ 29.487489][ T375] l2tp_session_create+0x38/0xbd0 [ 29.492524][ T375] pppol2tp_connect+0xbf5/0x1640 [ 29.497465][ T375] __sys_connect+0x3da/0x460 [ 29.502061][ T375] __x64_sys_connect+0x7a/0x90 [ 29.506847][ T375] x64_sys_call+0x88d/0x9a0 [ 29.511371][ T375] do_syscall_64+0x4c/0xa0 [ 29.515798][ T375] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 29.521697][ T375] [ 29.524021][ T375] Freed by task 375: [ 29.527913][ T375] kasan_set_track+0x4b/0x70 [ 29.532504][ T375] kasan_save_free_info+0x2b/0x40 [ 29.537524][ T375] ____kasan_slab_free+0x132/0x180 [ 29.542636][ T375] __kasan_slab_free+0x11/0x20 [ 29.547416][ T375] slab_free_freelist_hook+0xc2/0x190 [ 29.552802][ T375] __kmem_cache_free+0xb7/0x1b0 [ 29.557691][ T375] kfree+0x6f/0xf0 [ 29.562380][ T375] l2tp_session_put+0xaf/0x1a0 [ 29.567156][ T375] l2tp_session_delete+0x3df/0x4d0 [ 29.572263][ T375] pppol2tp_release+0x169/0x2b0 [ 29.577111][ T375] sock_close+0xc9/0x220 [ 29.581355][ T375] __fput+0x1fd/0x8f0 [ 29.585338][ T375] ____fput+0x15/0x20 [ 29.589333][ T375] task_work_run+0x1e1/0x250 [ 29.593953][ T375] exit_to_user_mode_loop+0x9b/0xb0 [ 29.599257][ T375] exit_to_user_mode_prepare+0x87/0xd0 [ 29.604748][ T375] syscall_exit_to_user_mode+0x1a/0x30 [ 29.610221][ T375] do_syscall_64+0x58/0xa0 [ 29.614642][ T375] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 29.620546][ T375] [ 29.622865][ T375] The buggy address belongs to the object at ffff888121758c00 [ 29.622865][ T375] which belongs to the cache kmalloc-512 of size 512 [ 29.636916][ T375] The buggy address is located 336 bytes inside of [ 29.636916][ T375] 512-byte region [ffff888121758c00, ffff888121758e00) [ 29.650191][ T375] [ 29.652519][ T375] The buggy address belongs to the physical page: [ 29.658961][ T375] page:ffffea000485d600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x121758 [ 29.669215][ T375] head:ffffea000485d600 order:2 compound_mapcount:0 compound_pincount:0 [ 29.677552][ T375] flags: 0x4000000000010200(slab|head|zone=1) [ 29.683638][ T375] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00 [ 29.692268][ T375] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 29.700844][ T375] page dumped because: kasan: bad access detected [ 29.707287][ T375] page_owner tracks the page as allocated [ 29.713007][ T375] page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 322, tgid 322 (kworker/1:2), ts 29181180386, free_ts 28397105567 [ 29.734978][ T375] post_alloc_hook+0x1f5/0x210 [ 29.739756][ T375] prep_new_page+0x1c/0x110 [ 29.744269][ T375] get_page_from_freelist+0x2ca9/0x2d20 [ 29.749825][ T375] __alloc_pages+0x1fa/0x610 [ 29.754463][ T375] alloc_slab_page+0x6e/0xf0 [ 29.759050][ T375] new_slab+0x98/0x3e0 [ 29.763113][ T375] ___slab_alloc+0x70f/0xb70 [ 29.767715][ T375] __slab_alloc+0x5e/0xa0 [ 29.772059][ T375] __kmem_cache_alloc_node+0x204/0x2d0 [ 29.777527][ T375] __kmalloc_node_track_caller+0xa1/0x1e0 [ 29.783247][ T375] __alloc_skb+0x226/0x4a0 [ 29.787663][ T375] __ipv6_ifa_notify+0x200/0xe80 [ 29.792597][ T375] addrconf_dad_completed+0x192/0xe80 [ 29.797966][ T375] addrconf_dad_work+0xc1b/0x14a0 [ 29.802991][ T375] process_one_work+0x717/0xc30 [ 29.807860][ T375] worker_thread+0xa4d/0x11d0 [ 29.812532][ T375] page last free stack trace: [ 29.817198][ T375] free_unref_page_prepare+0x80c/0x820 [ 29.822692][ T375] free_unref_page+0x93/0x530 [ 29.827369][ T375] __free_pages+0x67/0x100 [ 29.831789][ T375] __vunmap+0xa3c/0xc00 [ 29.835942][ T375] vfree+0x61/0x90 [ 29.839665][ T375] kcov_close+0x2b/0x50 [ 29.843821][ T375] __fput+0x1fd/0x8f0 [ 29.847805][ T375] ____fput+0x15/0x20 [ 29.851796][ T375] task_work_run+0x1e1/0x250 [ 29.856402][ T375] do_exit+0xaf2/0x2850 [ 29.860574][ T375] do_group_exit+0x21b/0x2e0 [ 29.865252][ T375] get_signal+0x1382/0x14f0 [ 29.869765][ T375] arch_do_signal_or_restart+0xd1/0x11c0 [ 29.875396][ T375] exit_to_user_mode_loop+0x7a/0xb0 [ 29.880595][ T375] exit_to_user_mode_prepare+0x87/0xd0 [ 29.886053][ T375] syscall_exit_to_user_mode+0x1a/0x30 [ 29.891523][ T375] [ 29.893841][ T375] Memory state around the buggy address: [ 29.899461][ T375] ffff888121758c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.907517][ T375] ffff888121758c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.915577][ T375] >ffff888121758d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.923633][ T375] ^ [ 29.930301][ T375] ffff888121758d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.938357][ T375] ffff888121758e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.946409][ T375] ================================================================== [ 29.960290][ T375] Disabling lock debugging due to kernel taint