Warning: Permanently added '10.128.0.213' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 84.781429][ T6873] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 84.819032][ T6879] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 84.849300][ T6881] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 84.875237][ T6882] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 84.923309][ T6880] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 84.955405][ T6883] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 85.079509][ T6883] syz-executor015 (6883) used greatest stack depth: 23704 bytes left [ 85.129543][ T6905] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 85.169570][ T6881] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 85.192816][ T6892] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 85.230922][ T6914] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. 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 [ 89.880123][ T8209] __nla_validate_parse: 102 callbacks suppressed [ 89.880156][ T8209] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 90.072555][ T8211] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 90.232505][ T8273] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 90.364331][ T8274] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 90.494506][ T8259] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 90.606892][ T8225] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. executing program executing program executing program executing program executing program executing program [ 90.770429][ T8403] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 90.945430][ T8402] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 91.002606][ T8404] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 91.037852][ T8401] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. 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 [ 94.561303][ T9454] ================================================================== [ 94.569597][ T9454] BUG: KASAN: use-after-free in vlan_dev_get_iflink+0x5f/0x70 [ 94.577067][ T9454] Read of size 4 at addr ffff888094a76100 by task syz-executor015/9454 [ 94.585311][ T9454] [ 94.587674][ T9454] CPU: 1 PID: 9454 Comm: syz-executor015 Not tainted 5.8.0-rc6-syzkaller #0 [ 94.596355][ T9454] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.606416][ T9454] Call Trace: [ 94.609724][ T9454] dump_stack+0x18f/0x20d [ 94.614084][ T9454] ? vlan_dev_get_iflink+0x5f/0x70 [ 94.619214][ T9454] ? vlan_dev_get_iflink+0x5f/0x70 [ 94.624341][ T9454] print_address_description.constprop.0.cold+0xae/0x436 [ 94.631387][ T9454] ? lockdep_hardirqs_off+0x66/0xa0 [ 94.636608][ T9454] ? vprintk_func+0x97/0x1a6 [ 94.641315][ T9454] ? vlan_dev_get_iflink+0x5f/0x70 [ 94.646449][ T9454] kasan_report.cold+0x1f/0x37 [ 94.651279][ T9454] ? vlan_dev_get_iflink+0x5f/0x70 [ 94.656455][ T9454] vlan_dev_get_iflink+0x5f/0x70 [ 94.661427][ T9454] ? vlan_dev_poll_controller+0x10/0x10 [ 94.667009][ T9454] dev_get_iflink+0x73/0xe0 [ 94.671546][ T9454] rfc2863_policy+0x243/0x2e0 [ 94.676297][ T9454] linkwatch_do_dev+0x2a/0x180 [ 94.681082][ T9454] linkwatch_forget_dev+0x16a/0x200 [ 94.686301][ T9454] netdev_run_todo+0x258/0xac0 [ 94.691128][ T9454] ? default_device_exit_batch+0x3d0/0x3d0 [ 94.696961][ T9454] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 94.702991][ T9454] ? trace_hardirqs_on+0x5f/0x220 [ 94.708036][ T9454] ? lockdep_hardirqs_on+0x6a/0xe0 [ 94.713172][ T9454] ? __rtnl_newlink+0x1730/0x1730 [ 94.718222][ T9454] rtnetlink_rcv_msg+0x45b/0xad0 [ 94.723189][ T9454] ? rtnetlink_put_metrics+0x510/0x510 [ 94.728682][ T9454] ? lock_acquire+0x1f1/0xad0 [ 94.733393][ T9454] ? netlink_deliver_tap+0x146/0xb70 [ 94.738711][ T9454] netlink_rcv_skb+0x15a/0x430 [ 94.743603][ T9454] ? rtnetlink_put_metrics+0x510/0x510 [ 94.749086][ T9454] ? netlink_ack+0xa10/0xa10 [ 94.753705][ T9454] netlink_unicast+0x533/0x7d0 [ 94.758527][ T9454] ? netlink_attachskb+0x810/0x810 [ 94.763659][ T9454] ? _copy_from_iter_full+0x247/0x890 [ 94.769051][ T9454] ? __phys_addr+0x9a/0x110 [ 94.773586][ T9454] ? __phys_addr_symbol+0x2c/0x70 [ 94.778636][ T9454] ? __check_object_size+0x171/0x3e4 [ 94.783947][ T9454] netlink_sendmsg+0x856/0xd90 [ 94.788736][ T9454] ? netlink_unicast+0x7d0/0x7d0 [ 94.793703][ T9454] ? netlink_unicast+0x7d0/0x7d0 [ 94.798700][ T9454] sock_sendmsg+0xcf/0x120 [ 94.803181][ T9454] ____sys_sendmsg+0x6e8/0x810 [ 94.807992][ T9454] ? kernel_sendmsg+0x50/0x50 [ 94.812679][ T9454] ? do_recvmmsg+0x6d0/0x6d0 [ 94.817286][ T9454] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 94.823283][ T9454] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 94.829331][ T9454] ___sys_sendmsg+0xf3/0x170 [ 94.833942][ T9454] ? sendmsg_copy_msghdr+0x160/0x160 [ 94.839245][ T9454] ? __fget_files+0x272/0x400 [ 94.843944][ T9454] ? lock_downgrade+0x820/0x820 [ 94.848832][ T9454] ? __fget_files+0x294/0x400 [ 94.853539][ T9454] ? __fget_light+0xea/0x280 [ 94.858156][ T9454] __sys_sendmsg+0xe5/0x1b0 [ 94.862684][ T9454] ? __sys_sendmsg_sock+0xb0/0xb0 [ 94.867721][ T9454] ? __x64_sys_futex+0x382/0x4e0 [ 94.872688][ T9454] ? do_syscall_64+0x1c/0xe0 [ 94.877291][ T9454] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 94.883292][ T9454] do_syscall_64+0x60/0xe0 [ 94.887722][ T9454] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 94.893621][ T9454] RIP: 0033:0x446cf9 [ 94.897511][ T9454] Code: Bad RIP value. [ 94.901601][ T9454] RSP: 002b:00007f4a27e29d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 94.910020][ T9454] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446cf9 [ 94.917999][ T9454] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 [ 94.925975][ T9454] RBP: 00000000006dbc70 R08: 0000000000000000 R09: 0000000000000000 [ 94.933952][ T9454] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 94.941928][ T9454] R13: 0000000040000000 R14: 0000001000000000 R15: 0705001000000048 [ 94.949924][ T9454] [ 94.952262][ T9454] Allocated by task 9440: [ 94.956611][ T9454] save_stack+0x1b/0x40 [ 94.960790][ T9454] __kasan_kmalloc.constprop.0+0xc2/0xd0 [ 94.966459][ T9454] kvmalloc_node+0x61/0xf0 [ 94.970901][ T9454] alloc_netdev_mqs+0x97/0xdc0 [ 94.975727][ T9454] rtnl_create_link+0x219/0xad0 [ 94.980605][ T9454] __rtnl_newlink+0xfa0/0x1730 [ 94.985392][ T9454] rtnl_newlink+0x64/0xa0 [ 94.989745][ T9454] rtnetlink_rcv_msg+0x44e/0xad0 [ 94.994736][ T9454] netlink_rcv_skb+0x15a/0x430 [ 94.999520][ T9454] netlink_unicast+0x533/0x7d0 [ 95.004306][ T9454] netlink_sendmsg+0x856/0xd90 [ 95.009094][ T9454] sock_sendmsg+0xcf/0x120 [ 95.013560][ T9454] ____sys_sendmsg+0x6e8/0x810 [ 95.018343][ T9454] ___sys_sendmsg+0xf3/0x170 [ 95.022956][ T9454] __sys_sendmsg+0xe5/0x1b0 [ 95.027513][ T9454] do_syscall_64+0x60/0xe0 [ 95.031981][ T9454] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 95.037884][ T9454] [ 95.040212][ T9454] Freed by task 9461: [ 95.044201][ T9454] save_stack+0x1b/0x40 [ 95.048363][ T9454] __kasan_slab_free+0xf5/0x140 [ 95.053223][ T9454] kfree+0x103/0x2c0 [ 95.057124][ T9454] kvfree+0x42/0x50 [ 95.060946][ T9454] device_release+0x71/0x200 [ 95.065550][ T9454] kobject_put+0x1c0/0x270 [ 95.069975][ T9454] netdev_run_todo+0x765/0xac0 [ 95.074755][ T9454] rtnetlink_rcv_msg+0x45b/0xad0 [ 95.079704][ T9454] netlink_rcv_skb+0x15a/0x430 [ 95.084476][ T9454] netlink_unicast+0x533/0x7d0 [ 95.089252][ T9454] netlink_sendmsg+0x856/0xd90 [ 95.094035][ T9454] sock_sendmsg+0xcf/0x120 [ 95.098462][ T9454] ____sys_sendmsg+0x6e8/0x810 [ 95.103234][ T9454] ___sys_sendmsg+0xf3/0x170 [ 95.107873][ T9454] __sys_sendmsg+0xe5/0x1b0 [ 95.112387][ T9454] do_syscall_64+0x60/0xe0 [ 95.116818][ T9454] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 95.122730][ T9454] [ 95.125062][ T9454] The buggy address belongs to the object at ffff888094a76000 [ 95.125062][ T9454] which belongs to the cache kmalloc-4k of size 4096 [ 95.139153][ T9454] The buggy address is located 256 bytes inside of [ 95.139153][ T9454] 4096-byte region [ffff888094a76000, ffff888094a77000) [ 95.152512][ T9454] The buggy address belongs to the page: [ 95.158166][ T9454] page:ffffea0002529d80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea0002529d80 order:1 compound_mapcount:0 [ 95.171620][ T9454] flags: 0xfffe0000010200(slab|head) [ 95.176918][ T9454] raw: 00fffe0000010200 ffffea000251fe88 ffffea0002375c88 ffff8880aa002000 [ 95.185536][ T9454] raw: 0000000000000000 ffff888094a76000 0000000100000001 0000000000000000 [ 95.194118][ T9454] page dumped because: kasan: bad access detected [ 95.200557][ T9454] [ 95.202885][ T9454] Memory state around the buggy address: [ 95.208528][ T9454] ffff888094a76000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.216600][ T9454] ffff888094a76080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.224705][ T9454] >ffff888094a76100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.232775][ T9454] ^ [ 95.236863][ T9454] ffff888094a76180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.244946][ T9454] ffff888094a76200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.253025][ T9454] ================================================================== executing program [ 95.261103][ T9454] Disabling lock debugging due to kernel taint [ 95.296714][ T9454] Kernel panic - not syncing: panic_on_warn set ... [ 95.299022][ T9553] __nla_validate_parse: 94 callbacks suppressed [ 95.299030][ T9553] netlink: 24 bytes leftover after parsing attributes in process `syz-executor015'. [ 95.303361][ T9454] CPU: 1 PID: 9454 Comm: syz-executor015 Tainted: G B 5.8.0-rc6-syzkaller #0 [ 95.329059][ T9454] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.339134][ T9454] Call Trace: [ 95.342456][ T9454] dump_stack+0x18f/0x20d [ 95.346893][ T9454] ? vlan_ethtool_get_ts_info+0x1f0/0x230 [ 95.352630][ T9454] panic+0x2e3/0x75c [ 95.356560][ T9454] ? __warn_printk+0xf3/0xf3 [ 95.361183][ T9454] ? preempt_schedule_common+0x59/0xc0 [ 95.366687][ T9454] ? vlan_dev_get_iflink+0x5f/0x70 [ 95.371816][ T9454] ? preempt_schedule_thunk+0x16/0x18 [ 95.377202][ T9454] ? trace_hardirqs_on+0x55/0x220 [ 95.382240][ T9454] ? vlan_dev_get_iflink+0x5f/0x70 [ 95.382485][ T9568] netlink: 4 bytes leftover after parsing attributes in process `syz-executor015'. [ 95.387390][ T9454] ? vlan_dev_get_iflink+0x5f/0x70 [ 95.387405][ T9454] end_report+0x4d/0x53 [ 95.387424][ T9454] kasan_report.cold+0xd/0x37 [ 95.387447][ T9454] ? vlan_dev_get_iflink+0x5f/0x70 [ 95.415728][ T9454] vlan_dev_get_iflink+0x5f/0x70 [ 95.420697][ T9454] ? vlan_dev_poll_controller+0x10/0x10 [ 95.426251][ T9454] dev_get_iflink+0x73/0xe0 [ 95.430761][ T9454] rfc2863_policy+0x243/0x2e0 [ 95.435445][ T9454] linkwatch_do_dev+0x2a/0x180 [ 95.440213][ T9454] linkwatch_forget_dev+0x16a/0x200 [ 95.445456][ T9454] netdev_run_todo+0x258/0xac0 [ 95.450336][ T9454] ? default_device_exit_batch+0x3d0/0x3d0 [ 95.456154][ T9454] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 95.462150][ T9454] ? trace_hardirqs_on+0x5f/0x220 [ 95.467191][ T9454] ? lockdep_hardirqs_on+0x6a/0xe0 [ 95.472329][ T9454] ? __rtnl_newlink+0x1730/0x1730 [ 95.477372][ T9454] rtnetlink_rcv_msg+0x45b/0xad0 [ 95.482325][ T9454] ? rtnetlink_put_metrics+0x510/0x510 [ 95.487802][ T9454] ? lock_acquire+0x1f1/0xad0 [ 95.492530][ T9454] ? netlink_deliver_tap+0x146/0xb70 [ 95.497862][ T9454] netlink_rcv_skb+0x15a/0x430 [ 95.502656][ T9454] ? rtnetlink_put_metrics+0x510/0x510 [ 95.508161][ T9454] ? netlink_ack+0xa10/0xa10 [ 95.512776][ T9454] netlink_unicast+0x533/0x7d0 [ 95.517681][ T9454] ? netlink_attachskb+0x810/0x810 [ 95.522844][ T9454] ? _copy_from_iter_full+0x247/0x890 [ 95.528267][ T9454] ? __phys_addr+0x9a/0x110 [ 95.532820][ T9454] ? __phys_addr_symbol+0x2c/0x70 [ 95.537867][ T9454] ? __check_object_size+0x171/0x3e4 [ 95.543166][ T9454] netlink_sendmsg+0x856/0xd90 [ 95.547957][ T9454] ? netlink_unicast+0x7d0/0x7d0 [ 95.552913][ T9454] ? netlink_unicast+0x7d0/0x7d0 [ 95.557869][ T9454] sock_sendmsg+0xcf/0x120 [ 95.562299][ T9454] ____sys_sendmsg+0x6e8/0x810 [ 95.567077][ T9454] ? kernel_sendmsg+0x50/0x50 [ 95.571784][ T9454] ? do_recvmmsg+0x6d0/0x6d0 [ 95.576382][ T9454] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 95.582378][ T9454] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 95.588372][ T9454] ___sys_sendmsg+0xf3/0x170 [ 95.593009][ T9454] ? sendmsg_copy_msghdr+0x160/0x160 [ 95.598334][ T9454] ? __fget_files+0x272/0x400 [ 95.603021][ T9454] ? lock_downgrade+0x820/0x820 [ 95.607897][ T9454] ? __fget_files+0x294/0x400 [ 95.612611][ T9454] ? __fget_light+0xea/0x280 [ 95.617249][ T9454] __sys_sendmsg+0xe5/0x1b0 [ 95.621802][ T9454] ? __sys_sendmsg_sock+0xb0/0xb0 [ 95.626871][ T9454] ? __x64_sys_futex+0x382/0x4e0 [ 95.631826][ T9454] ? do_syscall_64+0x1c/0xe0 [ 95.636467][ T9454] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 95.642489][ T9454] do_syscall_64+0x60/0xe0 [ 95.646954][ T9454] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 95.652850][ T9454] RIP: 0033:0x446cf9 [ 95.659172][ T9454] Code: Bad RIP value. [ 95.663242][ T9454] RSP: 002b:00007f4a27e29d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 95.671674][ T9454] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446cf9 [ 95.679650][ T9454] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000006 [ 95.687650][ T9454] RBP: 00000000006dbc70 R08: 0000000000000000 R09: 0000000000000000 [ 95.695628][ T9454] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 95.703602][ T9454] R13: 0000000040000000 R14: 0000001000000000 R15: 0705001000000048 [ 95.712763][ T9454] Kernel Offset: disabled [ 95.717129][ T9454] Rebooting in 86400 seconds..