cess permissive=1 [ 15.279738][ T30] audit: type=1400 audit(1782705117.822:63): avc: denied { siginh } for pid=223 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.113' (ED25519) to the list of known hosts. 2026/06/29 03:52:08 parsed 1 programs 2026/06/29 03:52:08 serving rpc on tcp://38875 [ 25.407828][ T30] audit: type=1400 audit(1782705128.002:64): avc: denied { node_bind } for pid=293 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 25.430061][ T30] audit: type=1400 audit(1782705128.002:65): avc: denied { module_request } for pid=293 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 [ 26.444463][ T30] audit: type=1400 audit(1782705129.032:66): avc: denied { mounton } for pid=300 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 [ 26.448238][ T300] cgroup: Unknown subsys name 'net' [ 26.467912][ T30] audit: type=1400 audit(1782705129.042:67): avc: denied { mount } for pid=300 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 [ 26.495438][ T30] audit: type=1400 audit(1782705129.072:68): avc: denied { unmount } for pid=300 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 26.495837][ T300] cgroup: Unknown subsys name 'devices' [ 26.606799][ T300] cgroup: Unknown subsys name 'hugetlb' [ 26.612486][ T300] cgroup: Unknown subsys name 'rlimit' [ 26.821751][ T30] audit: type=1400 audit(1782705129.412:69): avc: denied { setattr } for pid=300 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=254 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 26.845202][ T30] audit: type=1400 audit(1782705129.412:70): avc: denied { create } for pid=300 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 26.865687][ T30] audit: type=1400 audit(1782705129.412:71): avc: denied { write } for pid=300 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 26.885997][ T30] audit: type=1400 audit(1782705129.412:72): avc: denied { read } for pid=300 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 26.887700][ T304] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). Setting up swapspace version 1, size = 127995904 bytes [ 26.907059][ T30] audit: type=1400 audit(1782705129.422:73): avc: denied { mounton } for pid=300 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 [ 26.971685][ T300] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 27.399990][ T306] request_module fs-gadgetfs succeeded, but still no fs? [ 27.486244][ T311] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.493343][ T311] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.501011][ T311] device bridge_slave_0 entered promiscuous mode [ 27.508289][ T311] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.515460][ T311] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.522955][ T311] device bridge_slave_1 entered promiscuous mode [ 27.576031][ T311] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.583491][ T311] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.590901][ T311] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.597995][ T311] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.618713][ T312] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.626109][ T312] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.633851][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 27.642688][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.651729][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 27.660132][ T312] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.667254][ T312] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.677312][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.686169][ T312] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.693221][ T312] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.706895][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.716430][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.731633][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.742888][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.751780][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.759496][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.767918][ T311] device veth0_vlan entered promiscuous mode [ 27.779682][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.789346][ T311] device veth1_macvtap entered promiscuous mode [ 27.798936][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.810064][ T312] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.855920][ T311] syz-executor (311) used greatest stack depth: 21272 bytes left [ 28.497594][ T45] device bridge_slave_1 left promiscuous mode [ 28.503805][ T45] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.511933][ T45] device bridge_slave_0 left promiscuous mode [ 28.518735][ T45] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.527274][ T45] device veth1_macvtap left promiscuous mode [ 28.533343][ T45] device veth0_vlan left promiscuous mode 2026/06/29 03:52:11 executed programs: 0 [ 28.867028][ T369] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.874114][ T369] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.881913][ T369] device bridge_slave_0 entered promiscuous mode [ 28.889325][ T369] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.896476][ T369] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.903975][ T369] device bridge_slave_1 entered promiscuous mode [ 28.951221][ T369] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.958300][ T369] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.965739][ T369] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.972846][ T369] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.993413][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 29.001243][ T317] bridge0: port 1(bridge_slave_0) entered disabled state [ 29.008576][ T317] bridge0: port 2(bridge_slave_1) entered disabled state [ 29.017930][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 29.026465][ T317] bridge0: port 1(bridge_slave_0) entered blocking state [ 29.033518][ T317] bridge0: port 1(bridge_slave_0) entered forwarding state [ 29.042111][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 29.050482][ T317] bridge0: port 2(bridge_slave_1) entered blocking state [ 29.057826][ T317] bridge0: port 2(bridge_slave_1) entered forwarding state [ 29.070107][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 29.079493][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 29.093770][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 29.105362][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 29.113517][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 29.121337][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 29.129932][ T369] device veth0_vlan entered promiscuous mode [ 29.140415][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 29.149974][ T369] device veth1_macvtap entered promiscuous mode [ 29.159919][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 29.169993][ T317] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 29.196320][ T373] ================================================================== [ 29.204949][ T373] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 29.213159][ T373] Read of size 4 at addr ffff88811033e800 by task syz.2.17/373 [ 29.220712][ T373] [ 29.223087][ T373] CPU: 0 PID: 373 Comm: syz.2.17 Not tainted syzkaller #0 [ 29.230466][ T373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 29.240545][ T373] Call Trace: [ 29.243831][ T373] [ 29.246760][ T373] __dump_stack+0x21/0x30 [ 29.251096][ T373] dump_stack_lvl+0x110/0x170 [ 29.255779][ T373] ? show_regs_print_info+0x20/0x20 [ 29.260993][ T373] ? load_image+0x3f0/0x3f0 [ 29.265500][ T373] ? __local_bh_enable_ip+0x58/0x80 [ 29.270704][ T373] print_address_description+0x7f/0x2c0 [ 29.276262][ T373] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 29.282018][ T373] kasan_report+0x10f/0x150 [ 29.286528][ T373] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 29.292256][ T373] __asan_report_load4_noabort+0x14/0x20 [ 29.297897][ T373] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 29.303456][ T373] pppol2tp_release+0x150/0x2b0 [ 29.308309][ T373] sock_close+0xb8/0x200 [ 29.312574][ T373] ? sock_mmap+0xa0/0xa0 [ 29.316844][ T373] __fput+0x22b/0x900 [ 29.320834][ T373] ____fput+0x15/0x20 [ 29.324932][ T373] task_work_run+0x127/0x190 [ 29.329531][ T373] exit_to_user_mode_loop+0xd0/0xe0 [ 29.334996][ T373] exit_to_user_mode_prepare+0x87/0xd0 [ 29.340470][ T373] syscall_exit_to_user_mode+0x1a/0x30 [ 29.345933][ T373] do_syscall_64+0x58/0xa0 [ 29.350350][ T373] ? clear_bhb_loop+0x50/0xa0 [ 29.355040][ T373] ? clear_bhb_loop+0x50/0xa0 [ 29.359749][ T373] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 29.365650][ T373] RIP: 0033:0x7fda11b7be59 [ 29.370067][ T373] 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 [ 29.389677][ T373] RSP: 002b:00007ffdd2944a18 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 29.398098][ T373] RAX: 0000000000000000 RBX: 00007ffdd2944b00 RCX: 00007fda11b7be59 [ 29.406081][ T373] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 29.414310][ T373] RBP: 00000000000071e8 R08: 0000000000000001 R09: 0000000000000000 [ 29.422288][ T373] R10: 0000001b33020000 R11: 0000000000000246 R12: 0000000000000000 [ 29.430269][ T373] R13: 00007fda11df4fac R14: 00007fda11df4fa8 R15: 00007fda11df4fa0 [ 29.438244][ T373] [ 29.441264][ T373] [ 29.443582][ T373] Allocated by task 373: [ 29.447818][ T373] __kasan_kmalloc+0xd4/0x100 [ 29.452502][ T373] __kmalloc+0x13d/0x2c0 [ 29.456745][ T373] l2tp_session_create+0x39/0xb60 [ 29.461771][ T373] pppol2tp_connect+0xbf5/0x1640 [ 29.466744][ T373] __sys_connect+0x3cb/0x450 [ 29.471347][ T373] __x64_sys_connect+0x7a/0x90 [ 29.476246][ T373] x64_sys_call+0x7c/0x9a0 [ 29.480678][ T373] do_syscall_64+0x4c/0xa0 [ 29.486242][ T373] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 29.493117][ T373] [ 29.495884][ T373] Freed by task 8: [ 29.499612][ T373] kasan_set_track+0x4a/0x70 [ 29.504237][ T373] kasan_set_free_info+0x23/0x40 [ 29.509184][ T373] ____kasan_slab_free+0x125/0x160 [ 29.514927][ T373] __kasan_slab_free+0x11/0x20 [ 29.519707][ T373] slab_free_freelist_hook+0xc2/0x190 [ 29.525112][ T373] kfree+0xc4/0x270 [ 29.528937][ T373] l2tp_session_put+0xaf/0x1a0 [ 29.533719][ T373] l2tp_session_delete+0x3a9/0x4a0 [ 29.538842][ T373] l2tp_tunnel_del_work+0x180/0x3d0 [ 29.544045][ T373] process_one_work+0x6c8/0xbb0 [ 29.548901][ T373] worker_thread+0xaa0/0x1250 [ 29.553869][ T373] kthread+0x3f5/0x4f0 [ 29.557942][ T373] ret_from_fork+0x1f/0x30 [ 29.562369][ T373] [ 29.564713][ T373] The buggy address belongs to the object at ffff88811033e800 [ 29.564713][ T373] which belongs to the cache kmalloc-512 of size 512 [ 29.579658][ T373] The buggy address is located 0 bytes inside of [ 29.579658][ T373] 512-byte region [ffff88811033e800, ffff88811033ea00) [ 29.592897][ T373] The buggy address belongs to the page: [ 29.598555][ T373] page:ffffea000440cf00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11033c [ 29.608805][ T373] head:ffffea000440cf00 order:2 compound_mapcount:0 compound_pincount:0 [ 29.617135][ T373] flags: 0x4000000000010200(slab|head|zone=1) [ 29.623237][ T373] raw: 4000000000010200 ffffea000443a400 0000000600000006 ffff888100042f00 [ 29.631825][ T373] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 29.640582][ T373] page dumped because: kasan: bad access detected [ 29.646998][ T373] page_owner tracks the page as allocated [ 29.652727][ T373] page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 102, ts 5493550701, free_ts 0 [ 29.670788][ T373] post_alloc_hook+0x192/0x1b0 [ 29.675794][ T373] prep_new_page+0x1c/0x110 [ 29.680696][ T373] get_page_from_freelist+0x2c3a/0x2cd0 [ 29.686469][ T373] __alloc_pages+0x1a2/0x460 [ 29.691117][ T373] new_slab+0xa0/0x4d0 [ 29.695192][ T373] ___slab_alloc+0x3ac/0x840 [ 29.699796][ T373] __slab_alloc+0x49/0x90 [ 29.704139][ T373] __kmalloc_track_caller+0x169/0x2c0 [ 29.709747][ T373] __alloc_skb+0x210/0x730 [ 29.714621][ T373] alloc_uevent_skb+0x85/0x240 [ 29.719425][ T373] kobject_uevent_net_broadcast+0x335/0x5a0 [ 29.725324][ T373] kobject_uevent_env+0x52b/0x700 [ 29.730352][ T373] kobject_synth_uevent+0x457/0x940 [ 29.735563][ T373] store_uevent+0x16/0x30 [ 29.740071][ T373] module_attr_store+0x5f/0x80 [ 29.744838][ T373] sysfs_kf_write+0x129/0x150 [ 29.749737][ T373] page_owner free stack trace missing [ 29.755853][ T373] [ 29.758179][ T373] Memory state around the buggy address: [ 29.763813][ T373] ffff88811033e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.771883][ T373] ffff88811033e780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.780043][ T373] >ffff88811033e800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.788107][ T373] ^ [ 29.792181][ T373] ffff88811033e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.800253][ T373] ffff88811033e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.808476][ T373] ================================================================== [ 29.816539][ T373] Disabling lock debugging due to kernel taint [ 29.825755][ T373] ------------[ cut here ]------------ [ 29.831261][ T373] WARNING: CPU: 0 PID: 373 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 [ 29.841344][ T373] Modules linked in: [ 29.846000][ T373] CPU: 0 PID: 373 Comm: syz.2.17 Tainted: G B syzkaller #0 [ 29.855033][ T373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 29.865125][ T373] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 [ 29.871466][ T373] Code: 5d c3 e8 cc f2 0b fd be 02 00 00 00 eb 0a e8 c0 f2 0b fd be 01 00 00 00 4c 89 f7 e8 13 62 f2 fd e9 0f ff ff ff e8 a9 f2 0b fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 98 f2 0b fd 4c 89 f7 be 03 [ 29.891297][ T373] RSP: 0018:ffffc90000b47d10 EFLAGS: 00010293 [ 29.897453][ T373] RAX: ffffffff845db907 RBX: ffff8881115da000 RCX: ffff8881105ba780 [ 29.905547][ T373] RDX: 0000000000000000 RSI: 000000000b808900 RDI: 000000000c04eb7d [ 29.913545][ T373] RBP: ffffc90000b47d30 R08: 0000000000000003 R09: 0000000000000004 [ 29.921576][ T373] R10: dffffc0000000000 R11: fffffbfff0e18c4c R12: dffffc0000000000 [ 29.929869][ T373] R13: dffffc0000000000 R14: 000000000b808900 R15: ffff88811033e800 [ 29.938015][ T373] FS: 000055557e7cd500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 29.947015][ T373] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.953704][ T373] CR2: 00007fda11c3c2ac CR3: 000000012c698000 CR4: 00000000003506a0 [ 29.961759][ T373] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.969845][ T373] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.977902][ T373] Call Trace: [ 29.981233][ T373] [ 29.984194][ T373] pppol2tp_release+0x150/0x2b0 [ 29.989174][ T373] sock_close+0xb8/0x200 [ 29.993448][ T373] ? sock_mmap+0xa0/0xa0 [ 29.997771][ T373] __fput+0x22b/0x900 [ 30.001872][ T373] ____fput+0x15/0x20 [ 30.006017][ T373] task_work_run+0x127/0x190 [ 30.010667][ T373] exit_to_user_mode_loop+0xd0/0xe0 [ 30.016074][ T373] exit_to_user_mode_prepare+0x87/0xd0 [ 30.021582][ T373] syscall_exit_to_user_mode+0x1a/0x30 [ 30.027139][ T373] do_syscall_64+0x58/0xa0 [ 30.031582][ T373] ? clear_bhb_loop+0x50/0xa0 [ 30.036343][ T373] ? clear_bhb_loop+0x50/0xa0 [ 30.041086][ T373] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 30.047090][ T373] RIP: 0033:0x7fda11b7be59 [ 30.051578][ T373] 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 [ 30.071429][ T373] RSP: 002b:00007ffdd2944a18 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 30.080085][ T373] RAX: 0000000000000000 RBX: 00007ffdd2944b00 RCX: 00007fda11b7be59 [ 30.088548][ T373] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 30.096764][ T373] RBP: 00000000000071e8 R08: 0000000000000001 R09: 0000000000000000 [ 30.104857][ T373] R10: 0000001b33020000 R11: 0000000000000246 R12: 0000000000000000 [ 30.112903][ T373] R13: 00007fda11df4fac R14: 00007fda11df4fa8 R15: 00007fda11df4fa0 [ 30.121248][ T373] [ 30.124304][ T373] ---[ end trace 30271f34002800df ]---