Warning: Permanently added '10.128.0.246' (ECDSA) to the list of known hosts. 2020/06/15 09:07:46 fuzzer started 2020/06/15 09:07:46 connecting to host at 10.128.0.26:44055 2020/06/15 09:07:46 checking machine... 2020/06/15 09:07:46 checking revisions... 2020/06/15 09:07:46 testing simple program... [ 59.679895][ T6805] IPVS: ftp: loaded support on port[0] = 21 2020/06/15 09:07:46 building call list... [ 60.045800][ T231] tipc: TX() has been purged, node left! [ 60.578022][ T231] ================================================================== [ 60.586243][ T231] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 60.594128][ T231] Write of size 1 at addr ffff8880a89d89e4 by task kworker/u4:5/231 [ 60.602089][ T231] [ 60.604419][ T231] CPU: 0 PID: 231 Comm: kworker/u4:5 Not tainted 5.8.0-rc1-next-20200615-syzkaller #0 [ 60.614815][ T231] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.624873][ T231] Workqueue: netns cleanup_net [ 60.629627][ T231] Call Trace: [ 60.632945][ T231] dump_stack+0x18f/0x20d [ 60.637283][ T231] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.642825][ T231] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.648366][ T231] ? afs_put_call+0xa40/0xa40 [ 60.653041][ T231] print_address_description.constprop.0.cold+0xd3/0x413 [ 60.660067][ T231] ? vprintk_func+0x97/0x1a6 [ 60.664664][ T231] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.670206][ T231] kasan_report.cold+0x1f/0x37 [ 60.674973][ T231] ? rcu_read_lock_held_common+0x71/0xa0 [ 60.680603][ T231] ? afs_wake_up_async_call+0x6aa/0x770 [ 60.686149][ T231] afs_wake_up_async_call+0x6aa/0x770 [ 60.691522][ T231] ? afs_close_socket+0x320/0x320 [ 60.696555][ T231] ? afs_put_call+0xa40/0xa40 [ 60.701229][ T231] rxrpc_notify_socket+0x1db/0x5d0 [ 60.706348][ T231] ? afs_put_call+0xa40/0xa40 [ 60.711018][ T231] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 60.717433][ T231] rxrpc_call_completed+0xca/0xf0 [ 60.722466][ T231] rxrpc_discard_prealloc+0x781/0xab0 [ 60.727836][ T231] ? lock_sock_nested+0x94/0x110 [ 60.732776][ T231] rxrpc_listen+0x147/0x360 [ 60.737283][ T231] afs_close_socket+0x95/0x320 [ 60.742044][ T231] ? afs_purge_servers+0x16d/0x300 [ 60.747243][ T231] ? afs_rx_discard_new_call+0x50/0x50 [ 60.752723][ T231] ? init_wait_var_entry+0x200/0x200 [ 60.758016][ T231] ? rcu_read_lock_held_common+0xa0/0xa0 [ 60.763646][ T231] ? check_preemption_disabled+0x38/0x220 [ 60.769368][ T231] afs_net_exit+0x1bc/0x310 [ 60.773867][ T231] ? afs_net_init+0xe30/0xe30 [ 60.778546][ T231] ops_exit_list.isra.0+0xa8/0x150 [ 60.783754][ T231] cleanup_net+0x511/0xa50 [ 60.788180][ T231] ? unregister_pernet_device+0x70/0x70 [ 60.793751][ T231] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.799737][ T231] process_one_work+0x965/0x1690 [ 60.804772][ T231] ? lock_release+0x800/0x800 [ 60.809449][ T231] ? pwq_dec_nr_in_flight+0x310/0x310 [ 60.814826][ T231] ? rwlock_bug.part.0+0x90/0x90 [ 60.819775][ T231] worker_thread+0x96/0xe10 [ 60.824290][ T231] ? process_one_work+0x1690/0x1690 [ 60.829683][ T231] kthread+0x3b5/0x4a0 [ 60.833756][ T231] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.839492][ T231] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 60.845242][ T231] ret_from_fork+0x1f/0x30 [ 60.849682][ T231] [ 60.852014][ T231] Allocated by task 6805: [ 60.856357][ T231] save_stack+0x1b/0x40 [ 60.860541][ T231] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 60.866196][ T231] kmem_cache_alloc_trace+0x153/0x7d0 [ 60.871596][ T231] afs_alloc_call+0x55/0x630 [ 60.876272][ T231] afs_charge_preallocation+0xe9/0x2d0 [ 60.881752][ T231] afs_open_socket+0x292/0x360 [ 60.886512][ T231] afs_net_init+0xa6c/0xe30 [ 60.891010][ T231] ops_init+0xaf/0x420 [ 60.895071][ T231] setup_net+0x2de/0x860 [ 60.899310][ T231] copy_net_ns+0x293/0x590 [ 60.903723][ T231] create_new_namespaces+0x3fb/0xb30 [ 60.909005][ T231] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 60.914632][ T231] ksys_unshare+0x43d/0x8e0 [ 60.921925][ T231] __x64_sys_unshare+0x2d/0x40 [ 60.926688][ T231] do_syscall_64+0x60/0xe0 [ 60.931125][ T231] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.937003][ T231] [ 60.939324][ T231] Freed by task 231: [ 60.943215][ T231] save_stack+0x1b/0x40 [ 60.947365][ T231] __kasan_slab_free+0xf7/0x140 [ 60.952212][ T231] kfree+0x109/0x2b0 [ 60.956104][ T231] afs_put_call+0x585/0xa40 [ 60.960606][ T231] rxrpc_discard_prealloc+0x764/0xab0 [ 60.965971][ T231] rxrpc_listen+0x147/0x360 [ 60.970466][ T231] afs_close_socket+0x95/0x320 [ 60.975226][ T231] afs_net_exit+0x1bc/0x310 [ 60.979733][ T231] ops_exit_list.isra.0+0xa8/0x150 [ 60.984859][ T231] cleanup_net+0x511/0xa50 [ 60.989291][ T231] process_one_work+0x965/0x1690 [ 60.994233][ T231] worker_thread+0x96/0xe10 [ 60.998849][ T231] kthread+0x3b5/0x4a0 [ 61.003105][ T231] ret_from_fork+0x1f/0x30 [ 61.007520][ T231] [ 61.010801][ T231] The buggy address belongs to the object at ffff8880a89d8800 [ 61.010801][ T231] which belongs to the cache kmalloc-1k of size 1024 [ 61.025021][ T231] The buggy address is located 484 bytes inside of [ 61.025021][ T231] 1024-byte region [ffff8880a89d8800, ffff8880a89d8c00) [ 61.038554][ T231] The buggy address belongs to the page: [ 61.044182][ T231] page:ffffea0002a27600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880a89d8000 [ 61.054596][ T231] flags: 0xfffe0000000200(slab) [ 61.059460][ T231] raw: 00fffe0000000200 ffffea00025e8708 ffffea000280db48 ffff8880aa000c40 [ 61.068106][ T231] raw: ffff8880a89d8000 ffff8880a89d8000 0000000100000001 0000000000000000 [ 61.076678][ T231] page dumped because: kasan: bad access detected [ 61.083073][ T231] [ 61.085390][ T231] Memory state around the buggy address: [ 61.091013][ T231] ffff8880a89d8880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.099067][ T231] ffff8880a89d8900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.107121][ T231] >ffff8880a89d8980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.116123][ T231] ^ [ 61.123311][ T231] ffff8880a89d8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.131373][ T231] ffff8880a89d8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.139421][ T231] ================================================================== [ 61.147469][ T231] Disabling lock debugging due to kernel taint [ 61.153693][ T231] Kernel panic - not syncing: panic_on_warn set ... [ 61.160627][ T231] CPU: 0 PID: 231 Comm: kworker/u4:5 Tainted: G B 5.8.0-rc1-next-20200615-syzkaller #0 [ 61.171725][ T231] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.181787][ T231] Workqueue: netns cleanup_net [ 61.186548][ T231] Call Trace: [ 61.189838][ T231] dump_stack+0x18f/0x20d [ 61.194168][ T231] ? afs_wake_up_async_call+0x660/0x770 [ 61.199709][ T231] ? afs_put_call+0xa40/0xa40 [ 61.204398][ T231] panic+0x2e3/0x75c [ 61.208289][ T231] ? __warn_printk+0xf3/0xf3 [ 61.212860][ T231] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 61.219017][ T231] ? trace_hardirqs_on+0x55/0x220 [ 61.224043][ T231] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.229594][ T231] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.235133][ T231] ? afs_put_call+0xa40/0xa40 [ 61.239820][ T231] end_report+0x4d/0x53 [ 61.243964][ T231] kasan_report.cold+0xd/0x37 [ 61.248629][ T231] ? rcu_read_lock_held_common+0x71/0xa0 [ 61.254257][ T231] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.259829][ T231] afs_wake_up_async_call+0x6aa/0x770 [ 61.265190][ T231] ? afs_close_socket+0x320/0x320 [ 61.270456][ T231] ? afs_put_call+0xa40/0xa40 [ 61.275129][ T231] rxrpc_notify_socket+0x1db/0x5d0 [ 61.280241][ T231] ? afs_put_call+0xa40/0xa40 [ 61.284910][ T231] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.291302][ T231] rxrpc_call_completed+0xca/0xf0 [ 61.296316][ T231] rxrpc_discard_prealloc+0x781/0xab0 [ 61.301687][ T231] ? lock_sock_nested+0x94/0x110 [ 61.306599][ T231] rxrpc_listen+0x147/0x360 [ 61.311087][ T231] afs_close_socket+0x95/0x320 [ 61.315826][ T231] ? afs_purge_servers+0x16d/0x300 [ 61.320917][ T231] ? afs_rx_discard_new_call+0x50/0x50 [ 61.326351][ T231] ? init_wait_var_entry+0x200/0x200 [ 61.331620][ T231] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.337243][ T231] ? check_preemption_disabled+0x38/0x220 [ 61.342953][ T231] afs_net_exit+0x1bc/0x310 [ 61.347457][ T231] ? afs_net_init+0xe30/0xe30 [ 61.352550][ T231] ops_exit_list.isra.0+0xa8/0x150 [ 61.357657][ T231] cleanup_net+0x511/0xa50 [ 61.362051][ T231] ? unregister_pernet_device+0x70/0x70 [ 61.367595][ T231] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.373571][ T231] process_one_work+0x965/0x1690 [ 61.378500][ T231] ? lock_release+0x800/0x800 [ 61.383194][ T231] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.388549][ T231] ? rwlock_bug.part.0+0x90/0x90 [ 61.393463][ T231] worker_thread+0x96/0xe10 [ 61.397957][ T231] ? process_one_work+0x1690/0x1690 [ 61.403146][ T231] kthread+0x3b5/0x4a0 [ 61.407231][ T231] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.412928][ T231] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.418627][ T231] ret_from_fork+0x1f/0x30 [ 61.424462][ T231] Kernel Offset: disabled [ 61.428786][ T231] Rebooting in 86400 seconds..