[ 6.253053][ T24] audit: type=1400 audit(1786491645.900:58): avc: denied { read } for pid=188 comm="getty" name="log" dev="sda1" ino=2010 scontext=system_u:system_r:getty_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 syzkaller syzkaller login: [ 14.430930][ T24] audit: type=1400 audit(1786491654.120:59): avc: denied { transition } for pid=217 comm="sshd-session" path="/bin/sh" dev="sda1" ino=90 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.438644][ T24] audit: type=1400 audit(1786491654.120:60): avc: denied { noatsecure } for pid=217 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.446860][ T24] audit: type=1400 audit(1786491654.120:61): avc: denied { write } for pid=217 comm="sh" path="pipe:[13894]" dev="pipefs" ino=13894 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 14.461031][ T24] audit: type=1400 audit(1786491654.120:62): avc: denied { rlimitinh } for pid=217 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.479807][ T24] audit: type=1400 audit(1786491654.120:63): avc: denied { siginh } for pid=217 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.149' (ED25519) to the list of known hosts. 2026/08/11 23:41:03 parsed 1 programs 2026/08/11 23:41:03 serving rpc on tcp://46857 [ 23.786054][ T24] audit: type=1400 audit(1786491663.470:64): avc: denied { node_bind } for pid=287 comm="syz-execprog" saddr=::1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:node_t tclass=tcp_socket permissive=1 [ 23.807053][ T24] audit: type=1400 audit(1786491663.470:65): avc: denied { create } for pid=287 comm="syz-execprog" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=rawip_socket permissive=1 [ 23.826926][ T24] audit: type=1400 audit(1786491663.470:66): avc: denied { module_request } for pid=287 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 [ 24.472191][ T24] audit: type=1400 audit(1786491664.160:67): avc: denied { mounton } for pid=293 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 [ 24.473139][ T293] cgroup: Unknown subsys name 'net' [ 24.494865][ T24] audit: type=1400 audit(1786491664.160:68): avc: denied { mount } for pid=293 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 [ 24.522190][ T24] audit: type=1400 audit(1786491664.190:69): avc: denied { unmount } for pid=293 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 24.522348][ T293] cgroup: Unknown subsys name 'devices' [ 24.662253][ T293] cgroup: Unknown subsys name 'hugetlb' [ 24.667855][ T293] cgroup: Unknown subsys name 'rlimit' [ 24.781204][ T24] audit: type=1400 audit(1786491664.470:70): avc: denied { setattr } for pid=293 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=253 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 24.804511][ T24] audit: type=1400 audit(1786491664.470:71): avc: denied { create } for pid=293 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 24.809975][ T297] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 24.825113][ T24] audit: type=1400 audit(1786491664.470:72): avc: denied { write } for pid=293 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 24.853887][ T24] audit: type=1400 audit(1786491664.470:73): avc: denied { read } for pid=293 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 [ 24.913665][ T293] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 25.398233][ T301] request_module fs-gadgetfs succeeded, but still no fs? [ 25.408034][ T301] cgroup: cgroup: disabling cgroup2 socket matching due to net_prio or net_cls activation [ 25.530514][ T314] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.538158][ T314] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.545637][ T314] device bridge_slave_0 entered promiscuous mode [ 25.552533][ T314] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.559546][ T314] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.566923][ T314] device bridge_slave_1 entered promiscuous mode [ 25.599012][ T314] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.606554][ T314] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.613854][ T314] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.620890][ T314] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.638101][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.645858][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 25.653193][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 25.663537][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 25.671723][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 25.678743][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 25.687236][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 25.695538][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 25.702600][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 25.715069][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 25.724211][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 25.737194][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 25.748136][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 25.756451][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 25.763967][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 25.773067][ T314] device veth0_vlan entered promiscuous mode [ 25.782243][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 25.791172][ T314] device veth1_macvtap entered promiscuous mode [ 25.799566][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 25.809921][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2026/08/11 23:41:06 executed programs: 0 [ 26.436914][ T365] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.443993][ T365] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.451393][ T365] device bridge_slave_0 entered promiscuous mode [ 26.458376][ T365] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.465481][ T365] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.472979][ T365] device bridge_slave_1 entered promiscuous mode [ 26.509778][ T365] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.516851][ T365] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.524125][ T365] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.531158][ T365] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.542267][ T49] device bridge_slave_1 left promiscuous mode [ 26.548363][ T49] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.556243][ T49] device bridge_slave_0 left promiscuous mode [ 26.562841][ T49] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.570470][ T49] device veth1_macvtap left promiscuous mode [ 26.576710][ T49] device veth0_vlan left promiscuous mode [ 26.644638][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 26.651901][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 26.665000][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 26.672409][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.681333][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 26.689537][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 26.697711][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 26.704762][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 26.714916][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 26.723361][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 26.731600][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 26.738698][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 26.748864][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 26.756899][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 26.765635][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 26.773709][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 26.785688][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 26.794263][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 26.804878][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 26.812777][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 26.821426][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 26.828918][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 26.836739][ T365] device veth0_vlan entered promiscuous mode [ 26.847654][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 26.856054][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 26.865354][ T365] device veth1_macvtap entered promiscuous mode [ 26.880455][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 26.888699][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 26.897022][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 26.909861][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 26.918287][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 27.010940][ T390] ================================================================== [ 27.019048][ T390] BUG: KASAN: use-after-free in mutex_lock+0x85/0xf0 [ 27.025728][ T390] Write of size 8 at addr ffff88811154b150 by task syz.2.17/390 [ 27.033344][ T390] [ 27.035674][ T390] CPU: 0 PID: 390 Comm: syz.2.17 Not tainted syzkaller #0 [ 27.042779][ T390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 27.052834][ T390] Call Trace: [ 27.056121][ T390] __dump_stack+0x21/0x24 [ 27.060444][ T390] dump_stack_lvl+0x1a7/0x208 [ 27.065115][ T390] ? show_regs_print_info+0x18/0x18 [ 27.070305][ T390] ? thaw_kernel_threads+0x220/0x220 [ 27.075586][ T390] print_address_description+0x7f/0x2c0 [ 27.081125][ T390] ? mutex_lock+0x85/0xf0 [ 27.085448][ T390] kasan_report+0x100/0x140 [ 27.089940][ T390] ? mutex_lock+0x85/0xf0 [ 27.094272][ T390] kasan_check_range+0x249/0x2a0 [ 27.099201][ T390] __kasan_check_write+0x14/0x20 [ 27.104129][ T390] mutex_lock+0x85/0xf0 [ 27.108278][ T390] ? mutex_trylock+0xb0/0xb0 [ 27.112861][ T390] ? l2tp_session_put+0xb2/0x1a0 [ 27.117793][ T390] ? l2tp_session_delete+0x3a9/0x4a0 [ 27.123067][ T390] pppol2tp_release+0x178/0x2b0 [ 27.128088][ T390] sock_close+0xb8/0x200 [ 27.132332][ T390] ? sock_mmap+0xa0/0xa0 [ 27.136662][ T390] __fput+0x2dc/0x730 [ 27.140644][ T390] ____fput+0x15/0x20 [ 27.144623][ T390] task_work_run+0x127/0x190 [ 27.149206][ T390] do_exit+0xa7c/0x24e0 [ 27.153358][ T390] ? finish_task_switch+0x1e2/0x5a0 [ 27.158550][ T390] ? put_task_struct+0x90/0x90 [ 27.163391][ T390] ? remove_hrtimer+0x1aa/0x490 [ 27.168234][ T390] ? __kasan_check_write+0x14/0x20 [ 27.173337][ T390] ? _raw_spin_lock_irq+0x95/0xf0 [ 27.178349][ T390] do_group_exit+0x149/0x310 [ 27.182937][ T390] ? __kasan_check_write+0x14/0x20 [ 27.188039][ T390] ? recalc_sigpending+0x1c4/0x230 [ 27.193144][ T390] get_signal+0xfb1/0x1300 [ 27.197555][ T390] arch_do_signal_or_restart+0xe7/0x11b0 [ 27.203176][ T390] ? nanosleep_copyout+0x120/0x120 [ 27.208283][ T390] ? get_timespec64+0x116/0x1b0 [ 27.213129][ T390] ? __ia32_sys_rt_sigreturn+0x730/0x730 [ 27.218754][ T390] ? __x64_sys_clock_nanosleep+0xb0/0xb0 [ 27.224377][ T390] ? debug_smp_processor_id+0x17/0x20 [ 27.229738][ T390] exit_to_user_mode_loop+0xa2/0xe0 [ 27.234938][ T390] exit_to_user_mode_prepare+0x76/0xa0 [ 27.240391][ T390] syscall_exit_to_user_mode+0x1d/0x40 [ 27.245844][ T390] do_syscall_64+0x3d/0x40 [ 27.250253][ T390] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 27.256140][ T390] RIP: 0033:0x7ffba457b257 [ 27.260634][ T390] Code: Unable to access opcode bytes at RIP 0x7ffba457b22d. [ 27.267996][ T390] RSP: 002b:00007ffff9b28f80 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6 [ 27.276403][ T390] RAX: fffffffffffffdfc RBX: 0000555565021500 RCX: 00007ffba457b257 [ 27.284370][ T390] RDX: 00007ffff9b28fc0 RSI: 0000000000000000 RDI: 0000000000000000 [ 27.292338][ T390] RBP: 00007ffba4657024 R08: 0000000000000000 R09: 0000000000000000 [ 27.300300][ T390] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 27.308264][ T390] R13: 00007ffba4847fac R14: 00007ffba4847fa0 R15: 00007ffba4847fa0 [ 27.316230][ T390] [ 27.318552][ T390] Allocated by task 389: [ 27.322788][ T390] __kasan_kmalloc+0xd4/0x100 [ 27.327456][ T390] __kmalloc+0x19f/0x330 [ 27.331706][ T390] l2tp_session_create+0x39/0xb60 [ 27.336865][ T390] pppol2tp_connect+0xbf5/0x1640 [ 27.341804][ T390] __sys_connect+0x3ce/0x450 [ 27.346416][ T390] __x64_sys_connect+0x7a/0x90 [ 27.351173][ T390] do_syscall_64+0x31/0x40 [ 27.355689][ T390] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 27.361571][ T390] [ 27.363894][ T390] Freed by task 390: [ 27.367810][ T390] kasan_set_track+0x4a/0x70 [ 27.372398][ T390] kasan_set_free_info+0x23/0x40 [ 27.377331][ T390] ____kasan_slab_free+0x125/0x160 [ 27.382443][ T390] __kasan_slab_free+0x11/0x20 [ 27.387211][ T390] slab_free_freelist_hook+0xc5/0x190 [ 27.392576][ T390] kfree+0xc0/0x270 [ 27.396380][ T390] l2tp_session_put+0xb2/0x1a0 [ 27.401139][ T390] l2tp_session_delete+0x3a9/0x4a0 [ 27.406239][ T390] pppol2tp_release+0x169/0x2b0 [ 27.411106][ T390] sock_close+0xb8/0x200 [ 27.415342][ T390] __fput+0x2dc/0x730 [ 27.419318][ T390] ____fput+0x15/0x20 [ 27.423294][ T390] task_work_run+0x127/0x190 [ 27.427875][ T390] do_exit+0xa7c/0x24e0 [ 27.432024][ T390] do_group_exit+0x149/0x310 [ 27.436606][ T390] get_signal+0xfb1/0x1300 [ 27.441016][ T390] arch_do_signal_or_restart+0xe7/0x11b0 [ 27.446641][ T390] exit_to_user_mode_loop+0xa2/0xe0 [ 27.451832][ T390] exit_to_user_mode_prepare+0x76/0xa0 [ 27.457280][ T390] syscall_exit_to_user_mode+0x1d/0x40 [ 27.462732][ T390] do_syscall_64+0x3d/0x40 [ 27.467137][ T390] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 27.473012][ T390] [ 27.475336][ T390] The buggy address belongs to the object at ffff88811154b000 [ 27.475336][ T390] which belongs to the cache kmalloc-512 of size 512 [ 27.489378][ T390] The buggy address is located 336 bytes inside of [ 27.489378][ T390] 512-byte region [ffff88811154b000, ffff88811154b200) [ 27.502635][ T390] The buggy address belongs to the page: [ 27.508261][ T390] page:ffffea0004455200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x111548 [ 27.518490][ T390] head:ffffea0004455200 order:2 compound_mapcount:0 compound_pincount:0 [ 27.526801][ T390] flags: 0x4000000000010200(slab|head) [ 27.532256][ T390] raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043080 [ 27.540840][ T390] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 [ 27.549409][ T390] page dumped because: kasan: bad access detected [ 27.555813][ T390] page_owner tracks the page as allocated [ 27.561529][ T390] 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 365, ts 26932445958, free_ts 26931702948 [ 27.581916][ T390] prep_new_page+0x176/0x190 [ 27.586495][ T390] get_page_from_freelist+0x225f/0x23f0 [ 27.592028][ T390] __alloc_pages_nodemask+0x29a/0x640 [ 27.597389][ T390] new_slab+0x84/0x3f0 [ 27.601454][ T390] ___slab_alloc+0x2f8/0x4c0 [ 27.606131][ T390] __slab_alloc+0x63/0xa0 [ 27.610816][ T390] kmem_cache_alloc_trace+0x1a8/0x2e0 [ 27.616198][ T390] alloc_fair_sched_group+0x1f2/0x6d0 [ 27.621574][ T390] sched_create_group+0x42/0x230 [ 27.626508][ T390] cpu_cgroup_css_alloc+0xe/0x30 [ 27.631435][ T390] cgroup_apply_control_enable+0x338/0x12b0 [ 27.637315][ T390] cgroup_mkdir+0x143c/0x16d0 [ 27.642003][ T390] kernfs_iop_mkdir+0x1a3/0x2b0 [ 27.646859][ T390] vfs_mkdir+0x42c/0x600 [ 27.651104][ T390] do_mkdirat+0x14c/0x340 [ 27.655430][ T390] __x64_sys_mkdirat+0x7b/0x90 [ 27.660183][ T390] page last free stack trace: [ 27.664854][ T390] __free_pages_ok+0x80b/0x830 [ 27.669616][ T390] __free_pages+0xd8/0x390 [ 27.674024][ T390] __free_slab+0xcf/0x190 [ 27.678347][ T390] unfreeze_partials+0x150/0x180 [ 27.683283][ T390] put_cpu_partial+0xc1/0x180 [ 27.687949][ T390] __slab_free+0x2c9/0x3a0 [ 27.692457][ T390] ___cache_free+0x10e/0x130 [ 27.697036][ T390] qlink_free+0x50/0x90 [ 27.701184][ T390] qlist_free_all+0x5f/0xb0 [ 27.705680][ T390] kasan_quarantine_reduce+0x14a/0x160 [ 27.711127][ T390] __kasan_slab_alloc+0x2f/0xe0 [ 27.715971][ T390] slab_post_alloc_hook+0x5d/0x2f0 [ 27.721070][ T390] kmem_cache_alloc+0x15a/0x2d0 [ 27.726084][ T390] getname_flags+0xba/0x510 [ 27.730575][ T390] user_path_at_empty+0x2f/0x50 [ 27.735418][ T390] __se_sys_chroot+0x98/0x2e0 [ 27.740109][ T390] [ 27.742440][ T390] Memory state around the buggy address: [ 27.748071][ T390] ffff88811154b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.756132][ T390] ffff88811154b080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [