Warning: Permanently added '10.128.1.25' (ED25519) to the list of known hosts. 2026/06/23 20:38:46 parsed 1 programs 2026/06/23 20:38:46 serving rpc on tcp://39889 [ 24.089135][ T30] audit: type=1400 audit(1782247126.657:64): 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 [ 24.110098][ T30] audit: type=1400 audit(1782247126.657:65): 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 [ 24.754388][ T30] audit: type=1400 audit(1782247127.317:66): avc: denied { mounton } for pid=299 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 [ 24.755455][ T299] cgroup: Unknown subsys name 'net' [ 24.777056][ T30] audit: type=1400 audit(1782247127.317:67): avc: denied { mount } for pid=299 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 [ 24.804307][ T30] audit: type=1400 audit(1782247127.357:68): avc: denied { unmount } for pid=299 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 24.804486][ T299] cgroup: Unknown subsys name 'devices' [ 24.950169][ T299] cgroup: Unknown subsys name 'hugetlb' [ 24.955760][ T299] cgroup: Unknown subsys name 'rlimit' [ 25.096683][ T30] audit: type=1400 audit(1782247127.657:69): avc: denied { setattr } for pid=299 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 [ 25.119846][ T30] audit: type=1400 audit(1782247127.657:70): avc: denied { create } for pid=299 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 25.140249][ T30] audit: type=1400 audit(1782247127.657:71): avc: denied { write } for pid=299 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 25.145845][ T304] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 25.160532][ T30] audit: type=1400 audit(1782247127.657:72): avc: denied { read } for pid=299 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 [ 25.189305][ T30] audit: type=1400 audit(1782247127.657:73): avc: denied { mounton } for pid=299 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 [ 25.215328][ T299] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 25.582684][ T306] request_module fs-gadgetfs succeeded, but still no fs? [ 26.108348][ T352] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.115773][ T352] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.123173][ T352] device bridge_slave_0 entered promiscuous mode [ 26.130012][ T352] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.137035][ T352] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.144523][ T352] device bridge_slave_1 entered promiscuous mode [ 26.178180][ T352] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.185322][ T352] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.192605][ T352] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.199629][ T352] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.216062][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.223641][ T337] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.231156][ T337] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.239534][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.247679][ T337] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.254711][ T337] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.263171][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.271433][ T337] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.278444][ T337] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.289441][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.298273][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.311127][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.321460][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.329594][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.336892][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.344985][ T352] device veth0_vlan entered promiscuous mode [ 26.354131][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.362901][ T352] device veth1_macvtap entered promiscuous mode [ 26.371974][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.381459][ T337] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.406921][ T352] syz-executor (352) used greatest stack depth: 21408 bytes left 2026/06/23 20:38:49 executed programs: 0 [ 26.645676][ T368] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.652728][ T368] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.660083][ T368] device bridge_slave_0 entered promiscuous mode [ 26.666767][ T368] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.673817][ T368] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.681315][ T368] device bridge_slave_1 entered promiscuous mode [ 26.722339][ T368] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.729386][ T368] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.736602][ T368] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.743623][ T368] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.758805][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.766492][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.773964][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.782986][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.791131][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.798144][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.810316][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.818458][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.825476][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.836552][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.845625][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.861654][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.871946][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.880197][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.887494][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.896132][ T368] device veth0_vlan entered promiscuous mode [ 26.911566][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.920338][ T368] device veth1_macvtap entered promiscuous mode [ 26.928899][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.938281][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.965345][ T374] ================================================================== [ 26.973434][ T374] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 26.981519][ T374] Read of size 4 at addr ffff88810fd13c00 by task syz.2.17/374 [ 26.989055][ T374] [ 26.991380][ T374] CPU: 0 PID: 374 Comm: syz.2.17 Not tainted syzkaller #0 [ 26.998481][ T374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 27.008533][ T374] Call Trace: [ 27.011798][ T374] [ 27.014713][ T374] __dump_stack+0x21/0x30 [ 27.019022][ T374] dump_stack_lvl+0x110/0x170 [ 27.023675][ T374] ? show_regs_print_info+0x20/0x20 [ 27.028849][ T374] ? load_image+0x3f0/0x3f0 [ 27.033330][ T374] ? __local_bh_enable_ip+0x58/0x80 [ 27.038522][ T374] print_address_description+0x7f/0x2c0 [ 27.044046][ T374] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.049769][ T374] kasan_report+0x10f/0x150 [ 27.054253][ T374] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.059949][ T374] __asan_report_load4_noabort+0x14/0x20 [ 27.065559][ T374] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.071088][ T374] pppol2tp_release+0x150/0x2b0 [ 27.075924][ T374] sock_close+0xb8/0x200 [ 27.080151][ T374] ? sock_mmap+0xa0/0xa0 [ 27.084379][ T374] __fput+0x22b/0x900 [ 27.088339][ T374] ____fput+0x15/0x20 [ 27.092298][ T374] task_work_run+0x127/0x190 [ 27.096866][ T374] exit_to_user_mode_loop+0xd0/0xe0 [ 27.102043][ T374] exit_to_user_mode_prepare+0x87/0xd0 [ 27.107483][ T374] syscall_exit_to_user_mode+0x1a/0x30 [ 27.112923][ T374] do_syscall_64+0x58/0xa0 [ 27.117320][ T374] ? clear_bhb_loop+0x50/0xa0 [ 27.121973][ T374] ? clear_bhb_loop+0x50/0xa0 [ 27.126627][ T374] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.132496][ T374] RIP: 0033:0x7fe581aaae59 [ 27.136891][ 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 [ 27.156475][ T374] RSP: 002b:00007ffec76bd7d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 27.164874][ T374] RAX: 0000000000000000 RBX: 00007ffec76bd8c0 RCX: 00007fe581aaae59 [ 27.172839][ T374] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 27.180792][ T374] RBP: 0000000000006941 R08: 0000000000000001 R09: 0000000000000000 [ 27.188742][ T374] R10: 0000001b32f20000 R11: 0000000000000246 R12: 0000000000000000 [ 27.196723][ T374] R13: 00007fe581d23fac R14: 00007fe581d23fa8 R15: 00007fe581d23fa0 [ 27.204672][ T374] [ 27.207668][ T374] [ 27.209971][ T374] Allocated by task 374: [ 27.214182][ T374] __kasan_kmalloc+0xd4/0x100 [ 27.218839][ T374] __kmalloc+0x13d/0x2c0 [ 27.223064][ T374] l2tp_session_create+0x39/0xb60 [ 27.228067][ T374] pppol2tp_connect+0xbf5/0x1640 [ 27.232982][ T374] __sys_connect+0x3cb/0x450 [ 27.237546][ T374] __x64_sys_connect+0x7a/0x90 [ 27.242281][ T374] x64_sys_call+0x7c/0x9a0 [ 27.246673][ T374] do_syscall_64+0x4c/0xa0 [ 27.251064][ T374] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.256930][ T374] [ 27.259226][ T374] Freed by task 8: [ 27.262914][ T374] kasan_set_track+0x4a/0x70 [ 27.267480][ T374] kasan_set_free_info+0x23/0x40 [ 27.272417][ T374] ____kasan_slab_free+0x125/0x160 [ 27.277503][ T374] __kasan_slab_free+0x11/0x20 [ 27.282261][ T374] slab_free_freelist_hook+0xc2/0x190 [ 27.287613][ T374] kfree+0xc4/0x270 [ 27.291393][ T374] l2tp_session_put+0xaf/0x1a0 [ 27.296128][ T374] l2tp_session_delete+0x3a9/0x4a0 [ 27.301213][ T374] l2tp_tunnel_del_work+0x180/0x3d0 [ 27.306386][ T374] process_one_work+0x6c8/0xbb0 [ 27.311213][ T374] worker_thread+0xaa0/0x1250 [ 27.315865][ T374] kthread+0x3f5/0x4f0 [ 27.319905][ T374] ret_from_fork+0x1f/0x30 [ 27.324319][ T374] [ 27.326617][ T374] The buggy address belongs to the object at ffff88810fd13c00 [ 27.326617][ T374] which belongs to the cache kmalloc-512 of size 512 [ 27.340639][ T374] The buggy address is located 0 bytes inside of [ 27.340639][ T374] 512-byte region [ffff88810fd13c00, ffff88810fd13e00) [ 27.353739][ T374] The buggy address belongs to the page: [ 27.359355][ T374] page:ffffea00043f4400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fd10 [ 27.369581][ T374] head:ffffea00043f4400 order:2 compound_mapcount:0 compound_pincount:0 [ 27.377879][ T374] flags: 0x4000000000010200(slab|head|zone=1) [ 27.383932][ T374] raw: 4000000000010200 ffffea0004416400 0000000200000002 ffff888100042f00 [ 27.392496][ T374] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 27.401049][ T374] page dumped because: kasan: bad access detected [ 27.407436][ T374] page_owner tracks the page as allocated [ 27.413128][ T374] 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 3887247183, free_ts 0 [ 27.431157][ T374] post_alloc_hook+0x192/0x1b0 [ 27.435902][ T374] prep_new_page+0x1c/0x110 [ 27.440377][ T374] get_page_from_freelist+0x2c3a/0x2cd0 [ 27.445897][ T374] __alloc_pages+0x1a2/0x460 [ 27.450461][ T374] new_slab+0xa0/0x4d0 [ 27.454506][ T374] ___slab_alloc+0x3ac/0x840 [ 27.459073][ T374] __slab_alloc+0x49/0x90 [ 27.463380][ T374] __kmalloc_track_caller+0x169/0x2c0 [ 27.468727][ T374] __alloc_skb+0x210/0x730 [ 27.473121][ T374] alloc_uevent_skb+0x85/0x240 [ 27.477857][ T374] kobject_uevent_net_broadcast+0x335/0x5a0 [ 27.483722][ T374] kobject_uevent_env+0x52b/0x700 [ 27.488722][ T374] kobject_synth_uevent+0x457/0x940 [ 27.493894][ T374] store_uevent+0x16/0x30 [ 27.498197][ T374] module_attr_store+0x5f/0x80 [ 27.502933][ T374] sysfs_kf_write+0x129/0x150 [ 27.507582][ T374] page_owner free stack trace missing [ 27.512920][ T374] [ 27.515218][ T374] Memory state around the buggy address: [ 27.520817][ T374] ffff88810fd13b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.528849][ T374] ffff88810fd13b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.536881][ T374] >ffff88810fd13c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.544913][ T374] ^ [ 27.548955][ T374] ffff88810fd13c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.556987][ T374] ffff88810fd13d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.565014][ T374] ================================================================== [ 27.573042][ T374] Disabling lock debugging due to kernel taint [ 27.579909][ T374] ------------[ cut here ]------------ [ 27.585369][ T374] WARNING: CPU: 1 PID: 374 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 [ 27.608696][ T374] Modules linked in: [ 27.612600][ T374] CPU: 0 PID: 374 Comm: syz.2.17 Tainted: G B syzkaller #0 [ 27.621652][ T374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 27.631829][ T374] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 [ 27.638176][ T374] 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 [ 27.657798][ T374] RSP: 0018:ffffc90002bb7d10 EFLAGS: 00010293 [ 27.663879][ T374] RAX: ffffffff845db907 RBX: ffff8881113e5000 RCX: ffff88810dd4e2c0 [ 27.671848][ T374] RDX: 0000000000000000 RSI: 000000001d3d6380 RDI: 000000000c04eb7d [ 27.679820][ T374] RBP: ffffc90002bb7d30 R08: 0000000000000003 R09: 0000000000000004 [ 27.687767][ T374] R10: dffffc0000000000 R11: fffffbfff0e18c4c R12: dffffc0000000000 [ 27.695730][ T374] R13: dffffc0000000000 R14: 000000001d3d6380 R15: ffff88810fd13c00 [ 27.704131][ T374] FS: 000055557e5ad500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 27.713075][ T374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.719697][ T374] CR2: 0000200000000740 CR3: 000000011d319000 CR4: 00000000003506b0 [ 27.727688][ T374] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.735687][ T374] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.743834][ T374] Call Trace: [ 27.747120][ T374] [ 27.750301][ T374] pppol2tp_release+0x150/0x2b0 [ 27.755162][ T374] sock_close+0xb8/0x200 [ 27.759461][ T374] ? sock_mmap+0xa0/0xa0 [ 27.763713][ T374] __fput+0x22b/0x900 [ 27.767702][ T374] ____fput+0x15/0x20 [ 27.771719][ T374] task_work_run+0x127/0x190 [ 27.776338][ T374] exit_to_user_mode_loop+0xd0/0xe0 [ 27.781732][ T374] exit_to_user_mode_prepare+0x87/0xd0 [ 27.787271][ T374] syscall_exit_to_user_mode+0x1a/0x30 [ 27.792790][ T374] do_syscall_64+0x58/0xa0 [ 27.797221][ T374] ? clear_bhb_loop+0x50/0xa0 [ 27.801953][ T374] ? clear_bhb_loop+0x50/0xa0 [ 27.806633][ T374] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.812566][ T374] RIP: 0033:0x7fe581aaae59 [ 27.816978][ 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 [ 27.836713][ T374] RSP: 002b:00007ffec76bd7d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 27.845173][ T374] RAX: 0000000000000000 RBX: 00007ffec76bd8c0 RCX: 00007fe581aaae59 [ 27.853177][ T374] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 27.861251][ T374] RBP: 0000000000006941 R08: 0000000000000001 R09: 0000000000000000 [ 27.869400][ T374] R10: 0000001b32f20000 R11: 0000000000000246 R12: 0000000000000000 [ 27.877372][ T374] R13: 00007fe581d23fac R14: 00007fe581d23fa8 R15: 00007fe581d23fa0 [ 27.885405][ T374] [ 27.888416][ T374] ---[ end trace 23bab2a33be9afcb ]---