rocess permissive=1 [ 15.094148][ T30] audit: type=1400 audit(1783407930.967:63): avc: denied { siginh } for pid=237 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.113' (ED25519) to the list of known hosts. 2026/07/07 07:05:40 parsed 1 programs 2026/07/07 07:05:40 serving rpc on tcp://41203 [ 24.559966][ T30] audit: type=1400 audit(1783407940.437:64): 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 [ 24.580773][ T30] audit: type=1400 audit(1783407940.437:65): 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 [ 25.211240][ T30] audit: type=1400 audit(1783407941.087:66): 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 [ 25.212313][ T299] cgroup: Unknown subsys name 'net' [ 25.233895][ T30] audit: type=1400 audit(1783407941.097:67): 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 [ 25.261114][ T30] audit: type=1400 audit(1783407941.117:68): 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 [ 25.261253][ T299] cgroup: Unknown subsys name 'devices' [ 25.372936][ T299] cgroup: Unknown subsys name 'hugetlb' [ 25.378516][ T299] cgroup: Unknown subsys name 'rlimit' [ 25.519372][ T30] audit: type=1400 audit(1783407941.397:69): 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 [ 25.542542][ T30] audit: type=1400 audit(1783407941.397:70): 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 [ 25.563117][ T30] audit: type=1400 audit(1783407941.397:71): 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 [ 25.569023][ T303] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 25.583557][ T30] audit: type=1400 audit(1783407941.397:72): 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 [ 25.612235][ T30] audit: type=1400 audit(1783407941.397:73): 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 [ 25.645833][ T299] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 26.076126][ T307] request_module fs-gadgetfs succeeded, but still no fs? [ 26.543783][ T355] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.550811][ T355] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.558409][ T355] device bridge_slave_0 entered promiscuous mode [ 26.565462][ T355] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.572545][ T355] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.579945][ T355] device bridge_slave_1 entered promiscuous mode [ 26.613301][ T355] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.620324][ T355] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.627585][ T355] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.634609][ T355] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.650662][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.658392][ T330] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.665601][ T330] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.674172][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.682415][ T330] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.689419][ T330] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.697677][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.705940][ T330] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.712972][ T330] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.724424][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.733251][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.745837][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.756384][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.764493][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.772036][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.779875][ T355] device veth0_vlan entered promiscuous mode [ 26.788977][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.797951][ T355] device veth1_macvtap entered promiscuous mode [ 26.806679][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.816305][ T330] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.843152][ T355] syz-executor (355) used greatest stack depth: 22024 bytes left 2026/07/07 07:05:42 executed programs: 0 [ 27.035099][ T367] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.042149][ T367] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.049369][ T367] device bridge_slave_0 entered promiscuous mode [ 27.056231][ T367] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.063300][ T367] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.070534][ T367] device bridge_slave_1 entered promiscuous mode [ 27.108554][ T367] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.115654][ T367] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.122946][ T367] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.129956][ T367] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.151249][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.158932][ T10] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.166155][ T10] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.174884][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 27.183108][ T10] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.190114][ T10] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.198877][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 27.207098][ T10] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.214124][ T10] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.230088][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 27.239148][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 27.255457][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 27.266038][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.274016][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.281319][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.289497][ T367] device veth0_vlan entered promiscuous mode [ 27.305689][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 27.313875][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.322910][ T367] device veth1_macvtap entered promiscuous mode [ 27.330834][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 27.338486][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 27.346831][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.363018][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 27.371235][ T10] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.402961][ T371] ================================================================== [ 27.411131][ T371] BUG: KASAN: use-after-free in pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.419214][ T371] Read of size 4 at addr ffff88810fc7a000 by task syz.2.17/371 [ 27.426754][ T371] [ 27.429083][ T371] CPU: 1 PID: 371 Comm: syz.2.17 Not tainted syzkaller #0 [ 27.436188][ T371] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 27.446250][ T371] Call Trace: [ 27.449528][ T371] [ 27.452451][ T371] __dump_stack+0x21/0x30 [ 27.456760][ T371] dump_stack_lvl+0x110/0x170 [ 27.461411][ T371] ? show_regs_print_info+0x20/0x20 [ 27.466597][ T371] ? load_image+0x3f0/0x3f0 [ 27.471076][ T371] ? __local_bh_enable_ip+0x58/0x80 [ 27.476250][ T371] print_address_description+0x7f/0x2c0 [ 27.481775][ T371] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.487470][ T371] kasan_report+0x10f/0x150 [ 27.491948][ T371] ? pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.497642][ T371] __asan_report_load4_noabort+0x14/0x20 [ 27.503251][ T371] pppol2tp_sock_to_session+0x1a0/0x1b0 [ 27.508776][ T371] pppol2tp_release+0x150/0x2b0 [ 27.513597][ T371] sock_close+0xb8/0x200 [ 27.517814][ T371] ? sock_mmap+0xa0/0xa0 [ 27.522029][ T371] __fput+0x22b/0x900 [ 27.525987][ T371] ____fput+0x15/0x20 [ 27.529941][ T371] task_work_run+0x127/0x190 [ 27.534502][ T371] exit_to_user_mode_loop+0xd0/0xe0 [ 27.539673][ T371] exit_to_user_mode_prepare+0x87/0xd0 [ 27.545106][ T371] syscall_exit_to_user_mode+0x1a/0x30 [ 27.550540][ T371] do_syscall_64+0x58/0xa0 [ 27.554933][ T371] ? clear_bhb_loop+0x50/0xa0 [ 27.559583][ T371] ? clear_bhb_loop+0x50/0xa0 [ 27.564229][ T371] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.570097][ T371] RIP: 0033:0x7f300f8fee59 [ 27.574493][ T371] 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 [ 27.594072][ T371] RSP: 002b:00007ffe2be76df8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 27.602459][ T371] RAX: 0000000000000000 RBX: 00007ffe2be76ee0 RCX: 00007f300f8fee59 [ 27.610404][ T371] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 27.618346][ T371] RBP: 0000000000006af0 R08: 0000000000000001 R09: 0000000000000000 [ 27.626294][ T371] R10: 0000001b32e20000 R11: 0000000000000246 R12: 00007ffe2be76f20 [ 27.634264][ T371] R13: 00007f300fb86fac R14: 0000000000006b27 R15: 00007f300fb86fa0 [ 27.642220][ T371] [ 27.645216][ T371] [ 27.647514][ T371] Allocated by task 372: [ 27.651728][ T371] __kasan_kmalloc+0xd4/0x100 [ 27.656382][ T371] __kmalloc+0x13d/0x2c0 [ 27.660595][ T371] l2tp_session_create+0x39/0xb60 [ 27.665592][ T371] pppol2tp_connect+0xbf5/0x1640 [ 27.670504][ T371] __sys_connect+0x3cb/0x450 [ 27.675068][ T371] __x64_sys_connect+0x7a/0x90 [ 27.679807][ T371] x64_sys_call+0x7c/0x9a0 [ 27.684201][ T371] do_syscall_64+0x4c/0xa0 [ 27.688591][ T371] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.694455][ T371] [ 27.696761][ T371] Freed by task 10: [ 27.700534][ T371] kasan_set_track+0x4a/0x70 [ 27.705102][ T371] kasan_set_free_info+0x23/0x40 [ 27.710024][ T371] ____kasan_slab_free+0x125/0x160 [ 27.715112][ T371] __kasan_slab_free+0x11/0x20 [ 27.719852][ T371] slab_free_freelist_hook+0xc2/0x190 [ 27.725200][ T371] kfree+0xc4/0x270 [ 27.728993][ T371] l2tp_session_put+0xaf/0x1a0 [ 27.733741][ T371] l2tp_session_delete+0x3a9/0x4a0 [ 27.738827][ T371] l2tp_tunnel_del_work+0x180/0x3d0 [ 27.743994][ T371] process_one_work+0x6c8/0xbb0 [ 27.748827][ T371] worker_thread+0xaa0/0x1250 [ 27.753479][ T371] kthread+0x3f5/0x4f0 [ 27.757531][ T371] ret_from_fork+0x1f/0x30 [ 27.761922][ T371] [ 27.764217][ T371] The buggy address belongs to the object at ffff88810fc7a000 [ 27.764217][ T371] which belongs to the cache kmalloc-512 of size 512 [ 27.778239][ T371] The buggy address is located 0 bytes inside of [ 27.778239][ T371] 512-byte region [ffff88810fc7a000, ffff88810fc7a200) [ 27.791312][ T371] The buggy address belongs to the page: [ 27.796916][ T371] page:ffffea00043f1e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10fc78 [ 27.807136][ T371] head:ffffea00043f1e00 order:2 compound_mapcount:0 compound_pincount:0 [ 27.815434][ T371] flags: 0x4000000000010200(slab|head|zone=1) [ 27.821492][ T371] raw: 4000000000010200 ffffea0004417900 0000000500000005 ffff888100042f00 [ 27.830068][ T371] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 27.838622][ T371] page dumped because: kasan: bad access detected [ 27.845011][ T371] page_owner tracks the page as allocated [ 27.850711][ T371] 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 3795559295, free_ts 0 [ 27.868754][ T371] post_alloc_hook+0x192/0x1b0 [ 27.873504][ T371] prep_new_page+0x1c/0x110 [ 27.877984][ T371] get_page_from_freelist+0x2c3a/0x2cd0 [ 27.883498][ T371] __alloc_pages+0x1a2/0x460 [ 27.888059][ T371] new_slab+0xa0/0x4d0 [ 27.892098][ T371] ___slab_alloc+0x3ac/0x840 [ 27.896663][ T371] __slab_alloc+0x49/0x90 [ 27.900963][ T371] __kmalloc_track_caller+0x169/0x2c0 [ 27.906306][ T371] __alloc_skb+0x210/0x730 [ 27.910696][ T371] alloc_uevent_skb+0x85/0x240 [ 27.915430][ T371] kobject_uevent_net_broadcast+0x335/0x5a0 [ 27.921295][ T371] kobject_uevent_env+0x52b/0x700 [ 27.926289][ T371] kobject_synth_uevent+0x457/0x940 [ 27.931458][ T371] store_uevent+0x16/0x30 [ 27.935756][ T371] module_attr_store+0x5f/0x80 [ 27.940492][ T371] sysfs_kf_write+0x129/0x150 [ 27.945142][ T371] page_owner free stack trace missing [ 27.950480][ T371] [ 27.952779][ T371] Memory state around the buggy address: [ 27.958377][ T371] ffff88810fc79f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.966412][ T371] ffff88810fc79f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.974447][ T371] >ffff88810fc7a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.982480][ T371] ^ [ 27.986523][ T371] ffff88810fc7a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.994560][ T371] ffff88810fc7a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.002716][ T371] ================================================================== [ 28.010752][ T371] Disabling lock debugging due to kernel taint [ 28.021876][ T371] ------------[ cut here ]------------ [ 28.027469][ T371] WARNING: CPU: 1 PID: 371 at net/l2tp/l2tp_ppp.c:156 pppol2tp_sock_to_session+0x167/0x1b0 [ 28.037738][ T371] Modules linked in: [ 28.041711][ T371] CPU: 1 PID: 371 Comm: syz.2.17 Tainted: G B syzkaller #0 [ 28.050207][ T371] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 28.060266][ T371] RIP: 0010:pppol2tp_sock_to_session+0x167/0x1b0 [ 28.066607][ T371] Code: 5d c3 e8 1c f1 0b fd be 02 00 00 00 eb 0a e8 10 f1 0b fd be 01 00 00 00 4c 89 f7 e8 a3 60 f2 fd e9 0f ff ff ff e8 f9 f0 0b fd <0f> 0b 48 89 df e8 ef 00 00 00 eb bd e8 e8 f0 0b fd 4c 89 f7 be 03 [ 28.086219][ T371] RSP: 0018:ffffc90002017d10 EFLAGS: 00010293 [ 28.092289][ T371] RAX: ffffffff845dbbf7 RBX: ffff88811177f000 RCX: ffff88811e2c0000 [ 28.100238][ T371] RDX: 0000000000000000 RSI: 000000000ad34520 RDI: 000000000c04eb7d [ 28.108203][ T371] RBP: ffffc90002017d30 R08: 0000000000000003 R09: 0000000000000004 [ 28.116330][ T371] R10: dffffc0000000000 R11: fffffbfff0e18c4c R12: dffffc0000000000 [ 28.124312][ T371] R13: dffffc0000000000 R14: 000000000ad34520 R15: ffff88810fc7a000 [ 28.132745][ T371] FS: 000055555b791500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 28.141693][ T371] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.148265][ T371] CR2: 0000200000000000 CR3: 000000012d873000 CR4: 00000000003506a0 [ 28.156240][ T371] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.164214][ T371] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.172183][ T371] Call Trace: [ 28.175446][ T371] [ 28.178352][ T371] pppol2tp_release+0x150/0x2b0 [ 28.183198][ T371] sock_close+0xb8/0x200 [ 28.187458][ T371] ? sock_mmap+0xa0/0xa0 [ 28.191806][ T371] __fput+0x22b/0x900 [ 28.195808][ T371] ____fput+0x15/0x20 [ 28.199779][ T371] task_work_run+0x127/0x190 [ 28.204397][ T371] exit_to_user_mode_loop+0xd0/0xe0 [ 28.209587][ T371] exit_to_user_mode_prepare+0x87/0xd0 [ 28.215164][ T371] syscall_exit_to_user_mode+0x1a/0x30 [ 28.220649][ T371] do_syscall_64+0x58/0xa0 [ 28.225098][ T371] ? clear_bhb_loop+0x50/0xa0 [ 28.229783][ T371] ? clear_bhb_loop+0x50/0xa0 [ 28.234602][ T371] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 28.240565][ T371] RIP: 0033:0x7f300f8fee59 [ 28.245040][ T371] 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 [ 28.264698][ T371] RSP: 002b:00007ffe2be76df8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 28.273389][ T371] RAX: 0000000000000000 RBX: 00007ffe2be76ee0 RCX: 00007f300f8fee59 [ 28.281462][ T371] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 28.289446][ T371] RBP: 0000000000006af0 R08: 0000000000000001 R09: 0000000000000000 [ 28.297490][ T371] R10: 0000001b32e20000 R11: 0000000000000246 R12: 00007ffe2be76f20 [ 28.305658][ T371] R13: 00007f300fb86fac R14: 0000000000006b27 R15: 00007f300fb86fa0 [ 28.313675][ T371] [ 28.316702][ T371] ---[ end trace b184952c915c6149 ]---