[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.191' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 555.938641][ T6821] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 555.964963][ T6828] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 555.996589][ T6829] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 556.032301][ T6830] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 556.055037][ T6827] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 556.086535][ T6831] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 556.236416][ T6855] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 556.279447][ T6828] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 556.324146][ T6829] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 556.376810][ T6873] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 560.984530][ T8408] __nla_validate_parse: 118 callbacks suppressed [ 560.984539][ T8408] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.170322][ T8407] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.291219][ T8417] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.349407][ T8420] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.402719][ T8419] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.557816][ T8437] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.620394][ T8441] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.664091][ T8439] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.741141][ T8442] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 561.767987][ T8440] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. executing program executing program executing program executing program executing program executing program executing program [ 562.319010][ T8575] ================================================================== [ 562.327433][ T8575] BUG: KASAN: use-after-free in vlan_dev_get_iflink+0x5f/0x70 [ 562.334903][ T8575] Read of size 4 at addr ffff8880906aa100 by task syz-executor654/8575 [ 562.343134][ T8575] [ 562.345476][ T8575] CPU: 0 PID: 8575 Comm: syz-executor654 Not tainted 5.8.0-rc6-syzkaller #0 [ 562.354143][ T8575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 562.364254][ T8575] Call Trace: [ 562.367664][ T8575] dump_stack+0x18f/0x20d [ 562.372106][ T8575] ? vlan_dev_get_iflink+0x5f/0x70 [ 562.377223][ T8575] ? vlan_dev_get_iflink+0x5f/0x70 [ 562.382533][ T8575] print_address_description.constprop.0.cold+0xae/0x436 [ 562.389671][ T8575] ? lockdep_hardirqs_off+0x66/0xa0 [ 562.394947][ T8575] ? vprintk_func+0x97/0x1a6 [ 562.399554][ T8575] ? vlan_dev_get_iflink+0x5f/0x70 [ 562.404699][ T8575] kasan_report.cold+0x1f/0x37 [ 562.409473][ T8575] ? vlan_dev_get_iflink+0x5f/0x70 [ 562.414596][ T8575] vlan_dev_get_iflink+0x5f/0x70 [ 562.419538][ T8575] ? vlan_dev_poll_controller+0x10/0x10 [ 562.425184][ T8575] dev_get_iflink+0x73/0xe0 [ 562.429749][ T8575] rfc2863_policy+0x243/0x2e0 [ 562.434435][ T8575] linkwatch_do_dev+0x2a/0x180 [ 562.439206][ T8575] linkwatch_forget_dev+0x16a/0x200 [ 562.444462][ T8575] netdev_run_todo+0x258/0xac0 [ 562.449232][ T8575] ? default_device_exit_batch+0x3d0/0x3d0 [ 562.455091][ T8575] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 562.461156][ T8575] ? trace_hardirqs_on+0x5f/0x220 [ 562.466195][ T8575] ? lockdep_hardirqs_on+0x6a/0xe0 [ 562.471308][ T8575] ? __rtnl_newlink+0x1730/0x1730 [ 562.476333][ T8575] rtnetlink_rcv_msg+0x45b/0xad0 [ 562.481282][ T8575] ? rtnetlink_put_metrics+0x510/0x510 [ 562.486744][ T8575] ? lock_acquire+0x1f1/0xad0 [ 562.491534][ T8575] ? netlink_deliver_tap+0x146/0xb70 [ 562.496832][ T8575] netlink_rcv_skb+0x15a/0x430 [ 562.501600][ T8575] ? rtnetlink_put_metrics+0x510/0x510 [ 562.507062][ T8575] ? netlink_ack+0xa10/0xa10 [ 562.511669][ T8575] netlink_unicast+0x533/0x7d0 [ 562.516439][ T8575] ? netlink_attachskb+0x810/0x810 [ 562.521611][ T8575] ? _copy_from_iter_full+0x247/0x890 [ 562.527055][ T8575] ? __phys_addr+0x9a/0x110 [ 562.531576][ T8575] ? __phys_addr_symbol+0x2c/0x70 [ 562.536707][ T8575] ? __check_object_size+0x171/0x3e4 [ 562.542002][ T8575] netlink_sendmsg+0x856/0xd90 [ 562.546775][ T8575] ? netlink_unicast+0x7d0/0x7d0 [ 562.551722][ T8575] ? netlink_unicast+0x7d0/0x7d0 [ 562.556764][ T8575] sock_sendmsg+0xcf/0x120 [ 562.561182][ T8575] ____sys_sendmsg+0x6e8/0x810 [ 562.565957][ T8575] ? kernel_sendmsg+0x50/0x50 [ 562.570633][ T8575] ? do_recvmmsg+0x6d0/0x6d0 [ 562.575229][ T8575] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 562.581215][ T8575] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 562.587203][ T8575] ___sys_sendmsg+0xf3/0x170 [ 562.591798][ T8575] ? sendmsg_copy_msghdr+0x160/0x160 [ 562.597187][ T8575] ? __fget_files+0x272/0x400 [ 562.601884][ T8575] ? lock_downgrade+0x820/0x820 [ 562.606744][ T8575] ? __fget_files+0x294/0x400 [ 562.611429][ T8575] ? __fget_light+0xea/0x280 [ 562.616020][ T8575] __sys_sendmsg+0xe5/0x1b0 executing program executing program [ 562.620523][ T8575] ? __sys_sendmsg_sock+0xb0/0xb0 [ 562.625627][ T8575] ? __x64_sys_futex+0x382/0x4e0 [ 562.630590][ T8575] ? do_syscall_64+0x1c/0xe0 [ 562.635276][ T8575] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 562.641260][ T8575] do_syscall_64+0x60/0xe0 [ 562.645742][ T8575] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 562.651634][ T8575] RIP: 0033:0x446cf9 [ 562.655523][ T8575] Code: Bad RIP value. [ 562.659590][ T8575] RSP: 002b:00007f363ca79d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 562.667999][ T8575] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446cf9 [ 562.675977][ T8575] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 [ 562.683948][ T8575] RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 [ 562.691918][ T8575] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c [ 562.699890][ T8575] R13: 0000000040000000 R14: 0000001000000000 R15: 0705001000000048 [ 562.707870][ T8575] [ 562.710263][ T8575] Allocated by task 8575: [ 562.714644][ T8575] save_stack+0x1b/0x40 [ 562.718810][ T8575] __kasan_kmalloc.constprop.0+0xc2/0xd0 [ 562.724485][ T8575] kvmalloc_node+0x61/0xf0 [ 562.728909][ T8575] alloc_netdev_mqs+0x97/0xdc0 [ 562.733684][ T8575] rtnl_create_link+0x219/0xad0 [ 562.738533][ T8575] __rtnl_newlink+0xfa0/0x1730 [ 562.743299][ T8575] rtnl_newlink+0x64/0xa0 [ 562.747625][ T8575] rtnetlink_rcv_msg+0x44e/0xad0 [ 562.752587][ T8575] netlink_rcv_skb+0x15a/0x430 [ 562.757352][ T8575] netlink_unicast+0x533/0x7d0 [ 562.762114][ T8575] netlink_sendmsg+0x856/0xd90 [ 562.766879][ T8575] sock_sendmsg+0xcf/0x120 [ 562.771294][ T8575] ____sys_sendmsg+0x6e8/0x810 [ 562.776052][ T8575] ___sys_sendmsg+0xf3/0x170 [ 562.780638][ T8575] __sys_sendmsg+0xe5/0x1b0 [ 562.785145][ T8575] do_syscall_64+0x60/0xe0 [ 562.790776][ T8575] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 562.796654][ T8575] [ 562.798975][ T8575] Freed by task 8599: [ 562.803039][ T8575] save_stack+0x1b/0x40 [ 562.807194][ T8575] __kasan_slab_free+0xf5/0x140 [ 562.812046][ T8575] kfree+0x103/0x2c0 [ 562.815938][ T8575] kvfree+0x42/0x50 [ 562.819837][ T8575] device_release+0x71/0x200 [ 562.824430][ T8575] kobject_put+0x1c0/0x270 [ 562.828845][ T8575] netdev_run_todo+0x765/0xac0 [ 562.833608][ T8575] rtnetlink_rcv_msg+0x45b/0xad0 [ 562.838549][ T8575] netlink_rcv_skb+0x15a/0x430 [ 562.843315][ T8575] netlink_unicast+0x533/0x7d0 [ 562.848071][ T8575] netlink_sendmsg+0x856/0xd90 [ 562.852832][ T8575] sock_sendmsg+0xcf/0x120 [ 562.857242][ T8575] ____sys_sendmsg+0x6e8/0x810 [ 562.862099][ T8575] ___sys_sendmsg+0xf3/0x170 [ 562.866690][ T8575] __sys_sendmsg+0xe5/0x1b0 [ 562.871194][ T8575] do_syscall_64+0x60/0xe0 [ 562.875614][ T8575] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 562.881497][ T8575] [ 562.883827][ T8575] The buggy address belongs to the object at ffff8880906aa000 [ 562.883827][ T8575] which belongs to the cache kmalloc-4k of size 4096 [ 562.897880][ T8575] The buggy address is located 256 bytes inside of [ 562.897880][ T8575] 4096-byte region [ffff8880906aa000, ffff8880906ab000) [ 562.911231][ T8575] The buggy address belongs to the page: [ 562.916872][ T8575] page:ffffea000241aa80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea000241aa80 order:1 compound_mapcount:0 [ 562.930317][ T8575] flags: 0xfffe0000010200(slab|head) [ 562.935609][ T8575] raw: 00fffe0000010200 ffffea000299a688 ffffea0002986288 ffff8880aa002000 [ 562.944202][ T8575] raw: 0000000000000000 ffff8880906aa000 0000000100000001 0000000000000000 [ 562.952777][ T8575] page dumped because: kasan: bad access detected [ 562.959178][ T8575] [ 562.961501][ T8575] Memory state around the buggy address: [ 562.967131][ T8575] ffff8880906aa000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 562.975189][ T8575] ffff8880906aa080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 562.983250][ T8575] >ffff8880906aa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 562.991306][ T8575] ^ [ 562.995459][ T8575] ffff8880906aa180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 563.003605][ T8575] ffff8880906aa200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 563.011662][ T8575] ================================================================== [ 563.019718][ T8575] Disabling lock debugging due to kernel taint executing program executing program executing program executing program executing program executing program executing program executing program [ 563.412400][ T8827] syz-executor654 (8827) used greatest stack depth: 23712 bytes left executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 566.188524][ T9897] __nla_validate_parse: 107 callbacks suppressed [ 566.188532][ T9897] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 566.349550][ T9898] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 566.402423][ T9930] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 566.433914][ T9893] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 566.482650][ T9922] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. [ 566.524194][ T9933] netlink: 4 bytes leftover after parsing attributes in process `syz-executor654'. executing program executing program executing program executing program [ 566.604364][T10029] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. executing program [ 566.741280][T10028] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 566.777649][T10027] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. [ 566.832765][T10030] netlink: 24 bytes leftover after parsing attributes in process `syz-executor654'. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 569.313559][ T8575] Kernel panic - not syncing: panic_on_warn set ... [ 569.320178][ T8575] CPU: 1 PID: 8575 Comm: syz-executor654 Tainted: G B 5.8.0-rc6-syzkaller #0 [ 569.330227][ T8575] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 569.340288][ T8575] Call Trace: [ 569.343580][ T8575] dump_stack+0x18f/0x20d [ 569.347915][ T8575] ? vlan_ethtool_get_ts_info+0x1b0/0x230 [ 569.353723][ T8575] panic+0x2e3/0x75c [ 569.357628][ T8575] ? __warn_printk+0xf3/0xf3 [ 569.362220][ T8575] ? preempt_schedule_common+0x59/0xc0 [ 569.367674][ T8575] ? vlan_dev_get_iflink+0x5f/0x70 [ 569.372975][ T8575] ? preempt_schedule_thunk+0x16/0x18 [ 569.378340][ T8575] ? trace_hardirqs_on+0x55/0x220 [ 569.383361][ T8575] ? vlan_dev_get_iflink+0x5f/0x70 [ 569.388468][ T8575] ? vlan_dev_get_iflink+0x5f/0x70 [ 569.393568][ T8575] end_report+0x4d/0x53 [ 569.397712][ T8575] kasan_report.cold+0xd/0x37 [ 569.402388][ T8575] ? vlan_dev_get_iflink+0x5f/0x70 [ 569.407498][ T8575] vlan_dev_get_iflink+0x5f/0x70 [ 569.412437][ T8575] ? vlan_dev_poll_controller+0x10/0x10 [ 569.417974][ T8575] dev_get_iflink+0x73/0xe0 [ 569.422502][ T8575] rfc2863_policy+0x243/0x2e0 [ 569.427162][ T8575] linkwatch_do_dev+0x2a/0x180 [ 569.432024][ T8575] linkwatch_forget_dev+0x16a/0x200 [ 569.437302][ T8575] netdev_run_todo+0x258/0xac0 [ 569.442071][ T8575] ? default_device_exit_batch+0x3d0/0x3d0 [ 569.447869][ T8575] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 569.453840][ T8575] ? trace_hardirqs_on+0x5f/0x220 [ 569.458948][ T8575] ? lockdep_hardirqs_on+0x6a/0xe0 [ 569.464052][ T8575] ? __rtnl_newlink+0x1730/0x1730 [ 569.469068][ T8575] rtnetlink_rcv_msg+0x45b/0xad0 [ 569.474001][ T8575] ? rtnetlink_put_metrics+0x510/0x510 [ 569.479461][ T8575] ? lock_acquire+0x1f1/0xad0 [ 569.484144][ T8575] ? netlink_deliver_tap+0x146/0xb70 [ 569.489426][ T8575] netlink_rcv_skb+0x15a/0x430 [ 569.494210][ T8575] ? rtnetlink_put_metrics+0x510/0x510 [ 569.499658][ T8575] ? netlink_ack+0xa10/0xa10 [ 569.504251][ T8575] netlink_unicast+0x533/0x7d0 [ 569.509874][ T8575] ? netlink_attachskb+0x810/0x810 [ 569.514972][ T8575] ? _copy_from_iter_full+0x247/0x890 [ 569.520331][ T8575] ? __phys_addr+0x9a/0x110 [ 569.524820][ T8575] ? __phys_addr_symbol+0x2c/0x70 [ 569.529835][ T8575] ? __check_object_size+0x171/0x3e4 [ 569.535114][ T8575] netlink_sendmsg+0x856/0xd90 [ 569.539866][ T8575] ? netlink_unicast+0x7d0/0x7d0 [ 569.544793][ T8575] ? netlink_unicast+0x7d0/0x7d0 [ 569.549728][ T8575] sock_sendmsg+0xcf/0x120 [ 569.554140][ T8575] ____sys_sendmsg+0x6e8/0x810 [ 569.558896][ T8575] ? kernel_sendmsg+0x50/0x50 [ 569.563564][ T8575] ? do_recvmmsg+0x6d0/0x6d0 [ 569.568145][ T8575] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 569.574113][ T8575] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 569.580081][ T8575] ___sys_sendmsg+0xf3/0x170 [ 569.584665][ T8575] ? sendmsg_copy_msghdr+0x160/0x160 [ 569.589938][ T8575] ? __fget_files+0x272/0x400 [ 569.594602][ T8575] ? lock_downgrade+0x820/0x820 [ 569.599439][ T8575] ? __fget_files+0x294/0x400 [ 569.604123][ T8575] ? __fget_light+0xea/0x280 [ 569.608723][ T8575] __sys_sendmsg+0xe5/0x1b0 [ 569.613209][ T8575] ? __sys_sendmsg_sock+0xb0/0xb0 [ 569.618247][ T8575] ? __x64_sys_futex+0x382/0x4e0 [ 569.623173][ T8575] ? do_syscall_64+0x1c/0xe0 [ 569.627750][ T8575] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 569.633716][ T8575] do_syscall_64+0x60/0xe0 [ 569.638124][ T8575] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 569.643999][ T8575] RIP: 0033:0x446cf9 [ 569.647869][ T8575] Code: Bad RIP value. [ 569.651922][ T8575] RSP: 002b:00007f363ca79d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 569.660315][ T8575] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446cf9 [ 569.668272][ T8575] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 [ 569.676227][ T8575] RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 [ 569.684268][ T8575] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c [ 569.692225][ T8575] R13: 0000000040000000 R14: 0000001000000000 R15: 0705001000000048 [ 569.701668][ T8575] Kernel Offset: disabled [ 569.705983][ T8575] Rebooting in 86400 seconds..