Warning: Permanently added '10.128.0.53' (ED25519) to the list of known hosts. 2026/09/20 07:26:42 parsed 1 programs 2026/09/20 07:26:42 serving rpc on tcp://38181 [ 23.952223][ T30] audit: type=1400 audit(1789889202.223:64): 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 [ 23.973110][ T30] audit: type=1400 audit(1789889202.223:65): 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 [ 24.675902][ T30] audit: type=1400 audit(1789889202.943:66): 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 [ 24.676870][ T301] cgroup: Unknown subsys name 'net' [ 24.698594][ T30] audit: type=1400 audit(1789889202.943:67): 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 [ 24.725900][ T30] audit: type=1400 audit(1789889202.973:68): 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 [ 24.726057][ T301] cgroup: Unknown subsys name 'devices' [ 24.843234][ T301] cgroup: Unknown subsys name 'hugetlb' [ 24.848868][ T301] cgroup: Unknown subsys name 'rlimit' [ 24.960156][ T30] audit: type=1400 audit(1789889203.223:69): avc: denied { setattr } for pid=301 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 [ 24.983446][ T30] audit: type=1400 audit(1789889203.223:70): 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 [ 24.989150][ T304] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 25.005502][ T30] audit: type=1400 audit(1789889203.223:71): 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 [ 25.034263][ T30] audit: type=1400 audit(1789889203.223:72): 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 [ 25.054788][ T30] audit: type=1400 audit(1789889203.223:73): 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 [ 25.097073][ T301] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 25.551525][ T306] request_module fs-gadgetfs succeeded, but still no fs? [ 25.679989][ T319] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.687064][ T319] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.695150][ T319] device bridge_slave_0 entered promiscuous mode [ 25.702122][ T315] syz-executor (315) used greatest stack depth: 21632 bytes left [ 25.702195][ T319] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.716932][ T319] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.724411][ T319] device bridge_slave_1 entered promiscuous mode [ 25.760839][ T319] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.768081][ T319] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.775399][ T319] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.782612][ T319] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.800183][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.807954][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.815341][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.825230][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 25.833569][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.840624][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.850034][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 25.858289][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.865338][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.877354][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 25.886674][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 25.900317][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 25.911607][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 25.919614][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 25.927516][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 25.936693][ T319] device veth0_vlan entered promiscuous mode [ 25.946947][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 25.955869][ T319] device veth1_macvtap entered promiscuous mode [ 25.964837][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 25.975683][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 26.003686][ T319] syz-executor (319) used greatest stack depth: 21472 bytes left 2026/09/20 07:26:44 executed programs: 0 [ 26.658357][ T366] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.665459][ T366] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.672961][ T366] device bridge_slave_0 entered promiscuous mode [ 26.679836][ T366] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.686919][ T366] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.694433][ T366] device bridge_slave_1 entered promiscuous mode [ 26.745380][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 26.752842][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.764940][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 26.773448][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.781811][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.788885][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.796987][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 26.808773][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 26.817148][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.825828][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.832900][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.842967][ T45] device bridge_slave_1 left promiscuous mode [ 26.849084][ T45] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.856735][ T45] device bridge_slave_0 left promiscuous mode [ 26.862897][ T45] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.870535][ T45] device veth1_macvtap left promiscuous mode [ 26.876812][ T45] device veth0_vlan left promiscuous mode [ 26.957470][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.966820][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.980799][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.992229][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 27.000199][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 27.007723][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 27.015564][ T366] device veth0_vlan entered promiscuous mode [ 27.025898][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 27.034851][ T366] device veth1_macvtap entered promiscuous mode [ 27.044436][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 27.054401][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.077631][ T370] ================================================================== [ 27.085730][ T370] BUG: KASAN: use-after-free in mutex_lock+0x8e/0x1c0 [ 27.092499][ T370] Write of size 8 at addr ffff88812c773950 by task syz.2.17/370 [ 27.100121][ T370] [ 27.102435][ T370] CPU: 1 PID: 370 Comm: syz.2.17 Not tainted syzkaller #0 [ 27.109535][ T370] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 27.119586][ T370] Call Trace: [ 27.122859][ T370] [ 27.125795][ T370] __dump_stack+0x21/0x30 [ 27.130126][ T370] dump_stack_lvl+0x110/0x170 [ 27.134894][ T370] ? show_regs_print_info+0x20/0x20 [ 27.140093][ T370] ? load_image+0x3f0/0x3f0 [ 27.144619][ T370] print_address_description+0x7f/0x2c0 [ 27.150167][ T370] ? mutex_lock+0x8e/0x1c0 [ 27.154587][ T370] kasan_report+0x10f/0x150 [ 27.159085][ T370] ? mutex_lock+0x8e/0x1c0 [ 27.163491][ T370] kasan_check_range+0x249/0x2a0 [ 27.168436][ T370] __kasan_check_write+0x14/0x20 [ 27.173373][ T370] mutex_lock+0x8e/0x1c0 [ 27.177629][ T370] ? wait_for_completion_killable_timeout+0x10/0x10 [ 27.184290][ T370] ? l2tp_session_put+0xaf/0x1a0 [ 27.189231][ T370] ? l2tp_session_delete+0x3a9/0x4a0 [ 27.194524][ T370] pppol2tp_release+0x178/0x2b0 [ 27.199973][ T370] sock_close+0xb8/0x200 [ 27.204242][ T370] ? sock_mmap+0xa0/0xa0 [ 27.208527][ T370] __fput+0x22b/0x900 [ 27.212526][ T370] ____fput+0x15/0x20 [ 27.216503][ T370] task_work_run+0x127/0x190 [ 27.221085][ T370] exit_to_user_mode_loop+0xd0/0xe0 [ 27.226341][ T370] exit_to_user_mode_prepare+0x87/0xd0 [ 27.231811][ T370] syscall_exit_to_user_mode+0x1a/0x30 [ 27.237423][ T370] do_syscall_64+0x58/0xa0 [ 27.241841][ T370] ? clear_bhb_loop+0x50/0xa0 [ 27.246516][ T370] ? clear_bhb_loop+0x50/0xa0 [ 27.251191][ T370] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.257088][ T370] RIP: 0033:0x7fe80e26e159 [ 27.261589][ T370] 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 [ 27.281389][ T370] RSP: 002b:00007ffe768d3d08 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 27.289787][ T370] RAX: 0000000000000000 RBX: 00007ffe768d3df0 RCX: 00007fe80e26e159 [ 27.297746][ T370] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 27.305719][ T370] RBP: 00000000000069a5 R08: 0000000000000001 R09: 0000000000000000 [ 27.313767][ T370] R10: 0000001b32d20000 R11: 0000000000000246 R12: 0000000000000000 [ 27.322119][ T370] R13: 00007fe80e4f5fac R14: 00007fe80e4f5fa8 R15: 00007fe80e4f5fa0 [ 27.330964][ T370] [ 27.333980][ T370] [ 27.336299][ T370] Allocated by task 370: [ 27.340520][ T370] __kasan_kmalloc+0xd4/0x100 [ 27.345188][ T370] __kmalloc+0x13d/0x2c0 [ 27.349861][ T370] l2tp_session_create+0x39/0xb60 [ 27.354888][ T370] pppol2tp_connect+0xbf5/0x1640 [ 27.359826][ T370] __sys_connect+0x3cb/0x450 [ 27.364429][ T370] __x64_sys_connect+0x7a/0x90 [ 27.369177][ T370] x64_sys_call+0x7c/0x9a0 [ 27.373577][ T370] do_syscall_64+0x4c/0xa0 [ 27.378065][ T370] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.383962][ T370] [ 27.386274][ T370] Freed by task 370: [ 27.390341][ T370] kasan_set_track+0x4a/0x70 [ 27.395034][ T370] kasan_set_free_info+0x23/0x40 [ 27.399968][ T370] ____kasan_slab_free+0x125/0x160 [ 27.405246][ T370] __kasan_slab_free+0x11/0x20 [ 27.410006][ T370] slab_free_freelist_hook+0xc2/0x190 [ 27.415364][ T370] kfree+0xc4/0x270 [ 27.419257][ T370] l2tp_session_put+0xaf/0x1a0 [ 27.424182][ T370] l2tp_session_delete+0x3a9/0x4a0 [ 27.429298][ T370] pppol2tp_release+0x169/0x2b0 [ 27.434141][ T370] sock_close+0xb8/0x200 [ 27.438380][ T370] __fput+0x22b/0x900 [ 27.442495][ T370] ____fput+0x15/0x20 [ 27.446478][ T370] task_work_run+0x127/0x190 [ 27.451167][ T370] exit_to_user_mode_loop+0xd0/0xe0 [ 27.456968][ T370] exit_to_user_mode_prepare+0x87/0xd0 [ 27.462437][ T370] syscall_exit_to_user_mode+0x1a/0x30 [ 27.467903][ T370] do_syscall_64+0x58/0xa0 [ 27.472341][ T370] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 27.478249][ T370] [ 27.480584][ T370] The buggy address belongs to the object at ffff88812c773800 [ 27.480584][ T370] which belongs to the cache kmalloc-512 of size 512 [ 27.494716][ T370] The buggy address is located 336 bytes inside of [ 27.494716][ T370] 512-byte region [ffff88812c773800, ffff88812c773a00) [ 27.508019][ T370] The buggy address belongs to the page: [ 27.513648][ T370] page:ffffea0004b1dc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12c770 [ 27.523898][ T370] head:ffffea0004b1dc00 order:2 compound_mapcount:0 compound_pincount:0 [ 27.532216][ T370] flags: 0x4000000000010200(slab|head|zone=1) [ 27.538293][ T370] raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100042f00 [ 27.546899][ T370] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 27.555486][ T370] page dumped because: kasan: bad access detected [ 27.561894][ T370] page_owner tracks the page as allocated [ 27.567611][ T370] 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 366, ts 27070898812, free_ts 26241663436 [ 27.588012][ T370] post_alloc_hook+0x192/0x1b0 [ 27.592794][ T370] prep_new_page+0x1c/0x110 [ 27.597297][ T370] get_page_from_freelist+0x2c3a/0x2cd0 [ 27.602931][ T370] __alloc_pages+0x1a2/0x460 [ 27.607522][ T370] new_slab+0xa0/0x4d0 [ 27.611597][ T370] ___slab_alloc+0x3ac/0x840 [ 27.616190][ T370] __slab_alloc+0x49/0x90 [ 27.620532][ T370] kmem_cache_alloc_trace+0x146/0x270 [ 27.625901][ T370] alloc_fair_sched_group+0x1ba/0x6d0 [ 27.631274][ T370] sched_create_group+0x42/0x230 [ 27.636210][ T370] cpu_cgroup_css_alloc+0x18/0x1c0 [ 27.641392][ T370] cgroup_apply_control_enable+0x37b/0xdb0 [ 27.647197][ T370] cgroup_mkdir+0x1171/0x13d0 [ 27.651881][ T370] kernfs_iop_mkdir+0x1a3/0x2b0 [ 27.656729][ T370] vfs_mkdir+0x38b/0x590 [ 27.660968][ T370] do_mkdirat+0x174/0x4d0 [ 27.665299][ T370] page last free stack trace: [ 27.669966][ T370] free_unref_page_prepare+0x5fa/0x600 [ 27.675510][ T370] free_unref_page+0xae/0x540 [ 27.680274][ T370] __free_pages+0x6c/0x100 [ 27.684697][ T370] __vunmap+0x801/0x980 [ 27.688846][ T370] vfree+0x8b/0xc0 [ 27.692563][ T370] kcov_close+0x2b/0x50 [ 27.696721][ T370] __fput+0x22b/0x900 [ 27.700794][ T370] ____fput+0x15/0x20 [ 27.704775][ T370] task_work_run+0x127/0x190 [ 27.709360][ T370] do_exit+0xb70/0x29a0 [ 27.713517][ T370] do_group_exit+0x149/0x310 [ 27.718103][ T370] get_signal+0x64f/0x1430 [ 27.722515][ T370] arch_do_signal_or_restart+0xe2/0x1100 [ 27.728144][ T370] exit_to_user_mode_loop+0xa7/0xe0 [ 27.733428][ T370] exit_to_user_mode_prepare+0x87/0xd0 [ 27.738882][ T370] syscall_exit_to_user_mode+0x1a/0x30 [ 27.744352][ T370] [ 27.746678][ T370] Memory state around the buggy address: [ 27.752320][ T370] ffff88812c773800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.760379][ T370] ffff88812c773880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.768437][ T370] >ffff88812c773900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.776492][ T370] ^ [ 27.783164][ T370] ffff88812c773980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.791220][ T370] ffff88812c773a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.799291][ T370] ================================================================== [ 27.807343][ T370] Disabling lock debugging due to kernel taint