Warning: Permanently added '10.128.10.17' (ECDSA) to the list of known hosts. 2020/06/19 18:22:24 fuzzer started 2020/06/19 18:22:24 connecting to host at 10.128.0.26:44813 2020/06/19 18:22:24 checking machine... 2020/06/19 18:22:24 checking revisions... 2020/06/19 18:22:24 testing simple program... [ 60.558863][ T6822] IPVS: ftp: loaded support on port[0] = 21 2020/06/19 18:22:25 building call list... [ 60.917423][ T21] tipc: TX() has been purged, node left! [ 61.419788][ T21] ================================================================== [ 61.428017][ T21] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 61.436083][ T21] Write of size 1 at addr ffff8880a6e0c1e4 by task kworker/u4:1/21 [ 61.444048][ T21] [ 61.446376][ T21] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc1-syzkaller #0 [ 61.454602][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.464654][ T21] Workqueue: netns cleanup_net [ 61.469414][ T21] Call Trace: [ 61.472704][ T21] dump_stack+0x18f/0x20d [ 61.477042][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.483102][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.488646][ T21] ? afs_put_call+0xa40/0xa40 [ 61.493416][ T21] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.500439][ T21] ? vprintk_func+0x97/0x1a6 [ 61.505031][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.510578][ T21] kasan_report.cold+0x1f/0x37 [ 61.515344][ T21] ? rcu_read_lock_held_common+0x51/0xa0 [ 61.520971][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.526517][ T21] afs_wake_up_async_call+0x6aa/0x770 [ 61.531881][ T21] ? afs_close_socket+0x320/0x320 [ 61.536901][ T21] ? afs_put_call+0xa40/0xa40 [ 61.541573][ T21] rxrpc_notify_socket+0x1db/0x5d0 [ 61.546694][ T21] ? afs_put_call+0xa40/0xa40 [ 61.551369][ T21] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.557786][ T21] rxrpc_call_completed+0xca/0xf0 [ 61.562834][ T21] rxrpc_discard_prealloc+0x781/0xab0 [ 61.568340][ T21] ? lock_sock_nested+0x94/0x110 [ 61.576673][ T21] rxrpc_listen+0x147/0x360 [ 61.581191][ T21] afs_close_socket+0x95/0x320 [ 61.585953][ T21] ? afs_purge_servers+0x16d/0x300 [ 61.591087][ T21] ? afs_rx_discard_new_call+0x50/0x50 [ 61.596549][ T21] ? init_wait_var_entry+0x200/0x200 [ 61.601849][ T21] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.607509][ T21] ? check_preemption_disabled+0x38/0x220 [ 61.613227][ T21] afs_net_exit+0x1bc/0x310 [ 61.617725][ T21] ? afs_net_init+0xe30/0xe30 [ 61.622760][ T21] ops_exit_list.isra.0+0xa8/0x150 [ 61.627874][ T21] cleanup_net+0x511/0xa50 [ 61.632302][ T21] ? unregister_pernet_device+0x70/0x70 [ 61.637855][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.643845][ T21] process_one_work+0x965/0x1690 [ 61.648806][ T21] ? lock_release+0x800/0x800 [ 61.653670][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.659067][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 61.664035][ T21] worker_thread+0x96/0xe10 [ 61.668566][ T21] ? process_one_work+0x1690/0x1690 [ 61.673849][ T21] kthread+0x3b5/0x4a0 [ 61.677914][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.683633][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.689355][ T21] ret_from_fork+0x1f/0x30 [ 61.693794][ T21] [ 61.696113][ T21] Allocated by task 6822: [ 61.700442][ T21] save_stack+0x1b/0x40 [ 61.704597][ T21] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.710252][ T21] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.715618][ T21] afs_alloc_call+0x55/0x630 [ 61.720201][ T21] afs_charge_preallocation+0xe9/0x2d0 [ 61.725649][ T21] afs_open_socket+0x292/0x360 [ 61.730406][ T21] afs_net_init+0xa6c/0xe30 [ 61.734913][ T21] ops_init+0xaf/0x420 [ 61.738991][ T21] setup_net+0x2de/0x860 [ 61.743236][ T21] copy_net_ns+0x293/0x590 [ 61.747647][ T21] create_new_namespaces+0x3fb/0xb30 [ 61.752932][ T21] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.758563][ T21] ksys_unshare+0x43d/0x8e0 [ 61.763062][ T21] __x64_sys_unshare+0x2d/0x40 [ 61.767836][ T21] do_syscall_64+0x60/0xe0 [ 61.772604][ T21] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.778504][ T21] [ 61.780913][ T21] Freed by task 21: [ 61.784720][ T21] save_stack+0x1b/0x40 [ 61.788891][ T21] __kasan_slab_free+0xf7/0x140 [ 61.793737][ T21] kfree+0x109/0x2b0 [ 61.797628][ T21] afs_put_call+0x585/0xa40 [ 61.802132][ T21] rxrpc_discard_prealloc+0x764/0xab0 [ 61.807497][ T21] rxrpc_listen+0x147/0x360 [ 61.812012][ T21] afs_close_socket+0x95/0x320 [ 61.816811][ T21] afs_net_exit+0x1bc/0x310 [ 61.821328][ T21] ops_exit_list.isra.0+0xa8/0x150 [ 61.826652][ T21] cleanup_net+0x511/0xa50 [ 61.831076][ T21] process_one_work+0x965/0x1690 [ 61.836012][ T21] worker_thread+0x96/0xe10 [ 61.840509][ T21] kthread+0x3b5/0x4a0 [ 61.844574][ T21] ret_from_fork+0x1f/0x30 [ 61.848991][ T21] [ 61.851319][ T21] The buggy address belongs to the object at ffff8880a6e0c000 [ 61.851319][ T21] which belongs to the cache kmalloc-1k of size 1024 [ 61.865470][ T21] The buggy address is located 484 bytes inside of [ 61.865470][ T21] 1024-byte region [ffff8880a6e0c000, ffff8880a6e0c400) [ 61.878916][ T21] The buggy address belongs to the page: [ 61.884551][ T21] page:ffffea00029b8300 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 61.893651][ T21] flags: 0xfffe0000000200(slab) [ 61.898614][ T21] raw: 00fffe0000000200 ffffea00029e4488 ffffea00029d0ac8 ffff8880aa000c40 [ 61.907198][ T21] raw: 0000000000000000 ffff8880a6e0c000 0000000100000002 0000000000000000 [ 61.915769][ T21] page dumped because: kasan: bad access detected [ 61.922170][ T21] [ 61.924512][ T21] Memory state around the buggy address: [ 61.930143][ T21] ffff8880a6e0c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.938202][ T21] ffff8880a6e0c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.946257][ T21] >ffff8880a6e0c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.954309][ T21] ^ [ 61.961520][ T21] ffff8880a6e0c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.969594][ T21] ffff8880a6e0c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.977646][ T21] ================================================================== [ 61.985697][ T21] Disabling lock debugging due to kernel taint [ 61.991912][ T21] Kernel panic - not syncing: panic_on_warn set ... [ 61.998586][ T21] CPU: 0 PID: 21 Comm: kworker/u4:1 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 62.008691][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.018752][ T21] Workqueue: netns cleanup_net [ 62.023508][ T21] Call Trace: [ 62.026802][ T21] dump_stack+0x18f/0x20d [ 62.031144][ T21] ? afs_wake_up_async_call+0x670/0x770 [ 62.036688][ T21] ? afs_put_call+0xa40/0xa40 [ 62.041361][ T21] panic+0x2e3/0x75c [ 62.045257][ T21] ? __warn_printk+0xf3/0xf3 [ 62.049850][ T21] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 62.056007][ T21] ? trace_hardirqs_on+0x55/0x220 [ 62.061281][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.066827][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.072365][ T21] ? afs_put_call+0xa40/0xa40 [ 62.077034][ T21] end_report+0x4d/0x53 [ 62.081304][ T21] kasan_report.cold+0xd/0x37 [ 62.086095][ T21] ? rcu_read_lock_held_common+0x51/0xa0 [ 62.091716][ T21] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.097355][ T21] afs_wake_up_async_call+0x6aa/0x770 [ 62.102858][ T21] ? afs_close_socket+0x320/0x320 [ 62.107880][ T21] ? afs_put_call+0xa40/0xa40 [ 62.112917][ T21] rxrpc_notify_socket+0x1db/0x5d0 [ 62.118024][ T21] ? afs_put_call+0xa40/0xa40 [ 62.122706][ T21] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.129294][ T21] rxrpc_call_completed+0xca/0xf0 [ 62.134503][ T21] rxrpc_discard_prealloc+0x781/0xab0 [ 62.139869][ T21] ? lock_sock_nested+0x94/0x110 [ 62.144793][ T21] rxrpc_listen+0x147/0x360 [ 62.149634][ T21] afs_close_socket+0x95/0x320 [ 62.154400][ T21] ? afs_purge_servers+0x16d/0x300 [ 62.159502][ T21] ? afs_rx_discard_new_call+0x50/0x50 [ 62.164946][ T21] ? init_wait_var_entry+0x200/0x200 [ 62.170210][ T21] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.175820][ T21] ? check_preemption_disabled+0x38/0x220 [ 62.181543][ T21] afs_net_exit+0x1bc/0x310 [ 62.186054][ T21] ? afs_net_init+0xe30/0xe30 [ 62.190736][ T21] ops_exit_list.isra.0+0xa8/0x150 [ 62.195837][ T21] cleanup_net+0x511/0xa50 [ 62.200247][ T21] ? unregister_pernet_device+0x70/0x70 [ 62.205917][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.211887][ T21] process_one_work+0x965/0x1690 [ 62.216827][ T21] ? lock_release+0x800/0x800 [ 62.221507][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.226867][ T21] ? rwlock_bug.part.0+0x90/0x90 [ 62.231788][ T21] worker_thread+0x96/0xe10 [ 62.236294][ T21] ? process_one_work+0x1690/0x1690 [ 62.241550][ T21] kthread+0x3b5/0x4a0 [ 62.245622][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.251424][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.257249][ T21] ret_from_fork+0x1f/0x30 [ 62.262973][ T21] Kernel Offset: disabled [ 62.267320][ T21] Rebooting in 86400 seconds..