Warning: Permanently added '10.128.1.126' (ED25519) to the list of known hosts. 2026/07/29 01:06:14 parsed 1 programs 2026/07/29 01:06:14 serving rpc on tcp://40779 [ 23.875594][ T30] audit: type=1400 audit(1785287174.440:64): 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 [ 23.896920][ T30] audit: type=1400 audit(1785287174.440:65): 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 [ 24.505000][ T30] audit: type=1400 audit(1785287175.070:66): 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 [ 24.506074][ T299] cgroup: Unknown subsys name 'net' [ 24.528140][ T30] audit: type=1400 audit(1785287175.070:67): 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 [ 24.556487][ T30] audit: type=1400 audit(1785287175.100:68): 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 [ 24.556661][ T299] cgroup: Unknown subsys name 'devices' [ 24.694748][ T299] cgroup: Unknown subsys name 'hugetlb' [ 24.700384][ T299] cgroup: Unknown subsys name 'rlimit' [ 24.812438][ T30] audit: type=1400 audit(1785287175.370:69): 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 [ 24.835911][ T30] audit: type=1400 audit(1785287175.370:70): 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 [ 24.856576][ T30] audit: type=1400 audit(1785287175.370:71): 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 [ 24.862087][ T303] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 24.876850][ T30] audit: type=1400 audit(1785287175.370:72): 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 [ 24.905589][ T30] audit: type=1400 audit(1785287175.370:73): 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 [ 24.956586][ T299] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 25.354067][ T305] request_module fs-gadgetfs succeeded, but still no fs? [ 25.851099][ T343] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.858199][ T343] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.865632][ T343] device bridge_slave_0 entered promiscuous mode [ 25.872457][ T343] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.879689][ T343] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.888425][ T343] device bridge_slave_1 entered promiscuous mode [ 25.922284][ T343] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.929359][ T343] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.936661][ T343] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.943703][ T343] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.959857][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.967502][ T344] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.975251][ T344] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.984054][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 25.992304][ T344] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.999334][ T344] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.013845][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.022031][ T344] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.029064][ T344] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.036554][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.044990][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.057790][ T343] device veth0_vlan entered promiscuous mode [ 26.064432][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.072814][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.080768][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.088687][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.099368][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.108429][ T343] device veth1_macvtap entered promiscuous mode [ 26.117218][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.127014][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/07/29 01:06:17 executed programs: 0 [ 26.479264][ T367] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.486448][ T367] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.494319][ T367] device bridge_slave_0 entered promiscuous mode [ 26.501682][ T367] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.508752][ T367] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.516231][ T367] device bridge_slave_1 entered promiscuous mode [ 26.554258][ T367] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.561292][ T367] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.568564][ T367] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.575597][ T367] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.596800][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.604687][ T344] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.611941][ T344] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.635237][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.643422][ T344] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.650545][ T344] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.658064][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.666410][ T344] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.673639][ T344] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.680963][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.689577][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.701763][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.711290][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.719398][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.727013][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.735748][ T367] device veth0_vlan entered promiscuous mode [ 26.746405][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.755815][ T367] device veth1_macvtap entered promiscuous mode [ 26.765504][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.776344][ T344] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.799220][ T372] ================================================================== [ 26.807323][ T372] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 26.815402][ T372] Read of size 4 at addr ffff88812de17000 by task syz.2.17/372 [ 26.822931][ T372] [ 26.825485][ T372] CPU: 0 PID: 372 Comm: syz.2.17 Not tainted syzkaller #0 [ 26.832772][ T372] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 [ 26.842920][ T372] Call Trace: [ 26.846202][ T372] [ 26.849120][ T372] __dump_stack+0x21/0x30 [ 26.853435][ T372] dump_stack_lvl+0x110/0x170 [ 26.858261][ T372] ? show_regs_print_info+0x20/0x20 [ 26.863619][ T372] ? load_image+0x3f0/0x3f0 [ 26.868102][ T372] ? __local_bh_enable_ip+0x58/0x80 [ 26.873281][ T372] print_address_description+0x7f/0x2c0 [ 26.878828][ T372] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 26.884528][ T372] kasan_report+0x10f/0x150 [ 26.889019][ T372] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 26.894805][ T372] __asan_report_load4_noabort+0x14/0x20 [ 26.900417][ T372] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 26.905957][ T372] pppol2tp_release+0x150/0x2b0 [ 26.910960][ T372] sock_close+0xb8/0x200 [ 26.915178][ T372] ? sock_mmap+0xa0/0xa0 [ 26.919396][ T372] __fput+0x22b/0x900 [ 26.923364][ T372] ____fput+0x15/0x20 [ 26.927343][ T372] task_work_run+0x127/0x190 [ 26.931909][ T372] exit_to_user_mode_loop+0xd0/0xe0 [ 26.937177][ T372] exit_to_user_mode_prepare+0x87/0xd0 [ 26.942618][ T372] syscall_exit_to_user_mode+0x1a/0x30 [ 26.948057][ T372] do_syscall_64+0x58/0xa0 [ 26.952458][ T372] ? clear_bhb_loop+0x50/0xa0 [ 26.957106][ T372] ? clear_bhb_loop+0x50/0xa0 [ 26.961758][ T372] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 26.967779][ T372] RIP: 0033:0x7fc4477d9e99 [ 26.972189][ T372] 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 [ 26.991878][ T372] RSP: 002b:00007ffdf2ccb0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 27.000290][ T372] RAX: 0000000000000000 RBX: 00007ffdf2ccb1d0 RCX: 00007fc4477d9e99 [ 27.008241][ T372] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 27.016198][ T372] RBP: 0000000000006895 R08: 0000000000000001 R09: 0000000000000000 [ 27.024150][ T372] R10: 0000001b32e20000 R11: 0000000000000246 R12: 00007ffdf2ccb210 [ 27.032109][ T372] R13: 00007fc447a61fac R14: 00000000000068c9 R15: 00007fc447a61fa0 [ 27.040065][ T372] [ 27.043089][ T372] [ 27.045400][ T372] Allocated by task 373: [ 27.049615][ T372] __kasan_kmalloc+0xd4/0x100 [ 27.054283][ T372] __kmalloc+0x13d/0x2c0 [ 27.058502][ T372] l2tp_session_create+0x39/0xb60 [ 27.063865][ T372] pppol2tp_connect+0xbf5/0x1640 [ 27.068789][ T372] __sys_connect+0x3cb/0x450 [ 27.073352][ T372] __x64_sys_connect+0x7a/0x90 [ 27.078098][ T372] x64_sys_call+0x7c/0x9a0 [ 27.082490][ T372] do_syscall_64+0x4c/0xa0 [ 27.086993][ T372] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.092869][ T372] [ 27.095186][ T372] Freed by task 10: [ 27.098968][ T372] kasan_set_track+0x4a/0x70 [ 27.103549][ T372] kasan_set_free_info+0x23/0x40 [ 27.108462][ T372] ____kasan_slab_free+0x125/0x160 [ 27.113567][ T372] __kasan_slab_free+0x11/0x20 [ 27.118332][ T372] slab_free_freelist_hook+0xc2/0x190 [ 27.123705][ T372] kfree+0xc4/0x270 [ 27.127509][ T372] l2tp_session_put+0xaf/0x1a0 [ 27.132334][ T372] l2tp_session_delete+0x3a9/0x4a0 [ 27.137423][ T372] l2tp_tunnel_del_work+0x180/0x3d0 [ 27.142592][ T372] process_one_work+0x6c8/0xbb0 [ 27.147427][ T372] worker_thread+0xaa0/0x1250 [ 27.152085][ T372] kthread+0x3f5/0x4f0 [ 27.156144][ T372] ret_from_fork+0x1f/0x30 [ 27.160550][ T372] [ 27.162850][ T372] The buggy address belongs to the object at ffff88812de17000 [ 27.162850][ T372] which belongs to the cache kmalloc-512 of size 512 [ 27.176881][ T372] The buggy address is located 0 bytes inside of [ 27.176881][ T372] 512-byte region [ffff88812de17000, ffff88812de17200) [ 27.189996][ T372] The buggy address belongs to the page: [ 27.195635][ T372] page:ffffea0004b78500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12de14 [ 27.205965][ T372] head:ffffea0004b78500 order:2 compound_mapcount:0 compound_pincount:0 [ 27.214279][ T372] flags: 0x4000000000010200(slab|head|zone=1) [ 27.220475][ T372] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00 [ 27.229056][ T372] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 27.237616][ T372] page dumped because: kasan: bad access detected [ 27.244006][ T372] page_owner tracks the page as allocated [ 27.249728][ T372] page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 367, ts 26791429247, free_ts 0 [ 27.269249][ T372] post_alloc_hook+0x192/0x1b0 [ 27.274008][ T372] prep_new_page+0x1c/0x110 [ 27.278486][ T372] get_page_from_freelist+0x2c3a/0x2cd0 [ 27.284013][ T372] __alloc_pages+0x1a2/0x460 [ 27.288597][ T372] new_slab+0xa0/0x4d0 [ 27.292663][ T372] ___slab_alloc+0x3ac/0x840 [ 27.297242][ T372] __slab_alloc+0x49/0x90 [ 27.301551][ T372] kmem_cache_alloc_trace+0x146/0x270 [ 27.307040][ T372] alloc_fair_sched_group+0x1f2/0x6d0 [ 27.312406][ T372] sched_create_group+0x42/0x230 [ 27.317328][ T372] cpu_cgroup_css_alloc+0x18/0x1c0 [ 27.322418][ T372] cgroup_apply_control_enable+0x37b/0xdb0 [ 27.328221][ T372] cgroup_mkdir+0x1171/0x13d0 [ 27.332883][ T372] kernfs_iop_mkdir+0x1a3/0x2b0 [ 27.337719][ T372] vfs_mkdir+0x38b/0x590 [ 27.341942][ T372] do_mkdirat+0x174/0x4d0 [ 27.346255][ T372] page_owner free stack trace missing [ 27.351687][ T372] [ 27.354029][ T372] Memory state around the buggy address: [ 27.359649][ T372] ffff88812de16f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.367795][ T372] ffff88812de16f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.375829][ T372] >ffff88812de17000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.383859][ T372] ^ [ 27.387898][ T372] ffff88812de17080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.395933][ T372] ffff88812de17100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.403989][ T372] ================================================================== [ 27.412112][ T372] Disabling lock debugging due to kernel taint [ 27.423745][ T372] ------------[ cut here ]------------ [ 27.429246][ T372] WARNING: CPU: 1 PID: 372 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 [ 27.440033][ T372] Modules linked in: [ 27.444009][ T372] CPU: 1 PID: 372 Comm: syz.2.17 Tainted: G B syzkaller #0 [ 27.452520][ T372] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 [ 27.462599][ T372] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 [ 27.469075][ T372] Code: 5d c3 e8 bc a4 0b fd be 02 00 00 00 eb 0a e8 b0 a4 0b fd be 01 00 00 00 4c 89 f7 e8 53 23 f2 fd e9 0f ff ff ff e8 99 a4 0b fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 88 a4 0b fd 4c 89 f7 be 03 [ 27.488866][ T372] RSP: 0018:ffffc90000b07d10 EFLAGS: 00010293 [ 27.495095][ T372] RAX: ffffffff845e1247 RBX: ffff88811136c000 RCX: ffff888110834f00 [ 27.503215][ T372] RDX: 0000000000000000 RSI: 00000000017b6060 RDI: 000000000c04eb7d [ 27.511180][ T372] RBP: ffffc90000b07d30 R08: 0000000000000003 R09: 0000000000000004 [ 27.519166][ T372] R10: dffffc0000000000 R11: fffffbfff0e18c4c R12: dffffc0000000000 [ 27.527164][ T372] R13: dffffc0000000000 R14: 00000000017b6060 R15: ffff88812de17000 [ 27.535504][ T372] FS: 0000555588627500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 27.544461][ T372] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.551042][ T372] CR2: 00007fc447a63dac CR3: 00000001245c9000 CR4: 00000000003506a0 [ 27.559041][ T372] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.567386][ T372] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.575383][ T372] Call Trace: [ 27.578747][ T372] [ 27.581655][ T372] pppol2tp_release+0x150/0x2b0 [ 27.586543][ T372] sock_close+0xb8/0x200 [ 27.590800][ T372] ? sock_mmap+0xa0/0xa0 [ 27.595110][ T372] __fput+0x22b/0x900 [ 27.599138][ T372] ____fput+0x15/0x20 [ 27.603215][ T372] task_work_run+0x127/0x190 [ 27.607800][ T372] exit_to_user_mode_loop+0xd0/0xe0 [ 27.612990][ T372] exit_to_user_mode_prepare+0x87/0xd0 [ 27.618471][ T372] syscall_exit_to_user_mode+0x1a/0x30 [ 27.624034][ T372] do_syscall_64+0x58/0xa0 [ 27.628434][ T372] ? clear_bhb_loop+0x50/0xa0 [ 27.633112][ T372] ? clear_bhb_loop+0x50/0xa0 [ 27.638215][ T372] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.644242][ T372] RIP: 0033:0x7fc4477d9e99 [ 27.648678][ T372] 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 [ 27.668427][ T372] RSP: 002b:00007ffdf2ccb0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 27.677017][ T372] RAX: 0000000000000000 RBX: 00007ffdf2ccb1d0 RCX: 00007fc4477d9e99 [ 27.685026][ T372] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 27.692989][ T372] RBP: 0000000000006895 R08: 0000000000000001 R09: 0000000000000000 [ 27.701234][ T372] R10: 0000001b32e20000 R11: 0000000000000246 R12: 00007ffdf2ccb210 [ 27.709352][ T372] R13: 00007fc447a61fac R14: 00000000000068c9 R15: 00007fc447a61fa0 [ 27.718039][ T372] [ 27.721128][ T372] ---[ end trace 137cf3268799a51b ]---