Warning: Permanently added '10.128.1.33' (ECDSA) to the list of known hosts. 2020/06/19 17:38:15 fuzzer started 2020/06/19 17:38:15 connecting to host at 10.128.0.26:41377 2020/06/19 17:38:15 checking machine... 2020/06/19 17:38:15 checking revisions... 2020/06/19 17:38:15 testing simple program... [ 63.363597][ T6821] IPVS: ftp: loaded support on port[0] = 21 2020/06/19 17:38:16 building call list... [ 63.692957][ T6760] tipc: TX() has been purged, node left! [ 64.195179][ T6760] ================================================================== [ 64.203697][ T6760] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 64.211627][ T6760] Write of size 1 at addr ffff888099cb11e4 by task kworker/u4:7/6760 [ 64.219684][ T6760] [ 64.222628][ T6760] CPU: 1 PID: 6760 Comm: kworker/u4:7 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.231137][ T6760] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.241401][ T6760] Workqueue: netns cleanup_net [ 64.246158][ T6760] Call Trace: [ 64.249483][ T6760] dump_stack+0x18f/0x20d [ 64.253818][ T6760] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.259359][ T6760] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.264910][ T6760] ? afs_put_call+0xa40/0xa40 [ 64.269596][ T6760] print_address_description.constprop.0.cold+0xd3/0x413 [ 64.276622][ T6760] ? vprintk_func+0x97/0x1a6 [ 64.281515][ T6760] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.287059][ T6760] kasan_report.cold+0x1f/0x37 [ 64.292087][ T6760] ? rcu_read_lock_held_common+0x51/0xa0 [ 64.298934][ T6760] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.304488][ T6760] afs_wake_up_async_call+0x6aa/0x770 [ 64.309860][ T6760] ? afs_close_socket+0x320/0x320 [ 64.314979][ T6760] ? afs_put_call+0xa40/0xa40 [ 64.319653][ T6760] rxrpc_notify_socket+0x1db/0x5d0 [ 64.324797][ T6760] ? afs_put_call+0xa40/0xa40 [ 64.329491][ T6760] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 64.336026][ T6760] rxrpc_call_completed+0xca/0xf0 [ 64.341158][ T6760] rxrpc_discard_prealloc+0x781/0xab0 [ 64.347783][ T6760] ? lock_sock_nested+0x94/0x110 [ 64.352747][ T6760] rxrpc_listen+0x147/0x360 [ 64.357266][ T6760] afs_close_socket+0x95/0x320 [ 64.362034][ T6760] ? afs_purge_servers+0x16d/0x300 [ 64.367149][ T6760] ? afs_rx_discard_new_call+0x50/0x50 [ 64.372735][ T6760] ? init_wait_var_entry+0x200/0x200 [ 64.378026][ T6760] ? rcu_read_lock_held_common+0xa0/0xa0 [ 64.383686][ T6760] ? check_preemption_disabled+0x38/0x220 [ 64.389409][ T6760] afs_net_exit+0x1bc/0x310 [ 64.393930][ T6760] ? afs_net_init+0xe30/0xe30 [ 64.398704][ T6760] ops_exit_list.isra.0+0xa8/0x150 [ 64.403832][ T6760] cleanup_net+0x511/0xa50 [ 64.408949][ T6760] ? unregister_pernet_device+0x70/0x70 [ 64.414519][ T6760] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.420518][ T6760] process_one_work+0x965/0x1690 [ 64.425474][ T6760] ? lock_release+0x800/0x800 [ 64.430164][ T6760] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.435571][ T6760] ? rwlock_bug.part.0+0x90/0x90 [ 64.440628][ T6760] worker_thread+0x96/0xe10 [ 64.445146][ T6760] ? process_one_work+0x1690/0x1690 [ 64.450347][ T6760] kthread+0x3b5/0x4a0 [ 64.454523][ T6760] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.460240][ T6760] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.466310][ T6760] ret_from_fork+0x1f/0x30 [ 64.470746][ T6760] [ 64.473080][ T6760] Allocated by task 6821: [ 64.477672][ T6760] save_stack+0x1b/0x40 [ 64.481884][ T6760] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 64.487533][ T6760] kmem_cache_alloc_trace+0x153/0x7d0 [ 64.492940][ T6760] afs_alloc_call+0x55/0x630 [ 64.497535][ T6760] afs_charge_preallocation+0xe9/0x2d0 [ 64.502996][ T6760] afs_open_socket+0x292/0x360 [ 64.507753][ T6760] afs_net_init+0xa6c/0xe30 [ 64.512256][ T6760] ops_init+0xaf/0x420 [ 64.516460][ T6760] setup_net+0x2de/0x860 [ 64.520710][ T6760] copy_net_ns+0x293/0x590 [ 64.525996][ T6760] create_new_namespaces+0x3fb/0xb30 [ 64.531282][ T6760] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 64.536944][ T6760] ksys_unshare+0x43d/0x8e0 [ 64.541444][ T6760] __ia32_sys_unshare+0x2c/0x40 [ 64.547165][ T6760] do_syscall_32_irqs_on+0x3f/0x60 [ 64.552368][ T6760] do_fast_syscall_32+0x7f/0x120 [ 64.557344][ T6760] entry_SYSENTER_compat+0x6d/0x7c [ 64.562440][ T6760] [ 64.564837][ T6760] Freed by task 6760: [ 64.568911][ T6760] save_stack+0x1b/0x40 [ 64.573077][ T6760] __kasan_slab_free+0xf7/0x140 [ 64.578018][ T6760] kfree+0x109/0x2b0 [ 64.581913][ T6760] afs_put_call+0x585/0xa40 [ 64.586414][ T6760] rxrpc_discard_prealloc+0x764/0xab0 [ 64.592000][ T6760] rxrpc_listen+0x147/0x360 [ 64.596510][ T6760] afs_close_socket+0x95/0x320 [ 64.601262][ T6760] afs_net_exit+0x1bc/0x310 [ 64.605761][ T6760] ops_exit_list.isra.0+0xa8/0x150 [ 64.610887][ T6760] cleanup_net+0x511/0xa50 [ 64.615300][ T6760] process_one_work+0x965/0x1690 [ 64.620236][ T6760] worker_thread+0x96/0xe10 [ 64.624740][ T6760] kthread+0x3b5/0x4a0 [ 64.628900][ T6760] ret_from_fork+0x1f/0x30 [ 64.633346][ T6760] [ 64.635689][ T6760] The buggy address belongs to the object at ffff888099cb1000 [ 64.635689][ T6760] which belongs to the cache kmalloc-1k of size 1024 [ 64.649903][ T6760] The buggy address is located 484 bytes inside of [ 64.649903][ T6760] 1024-byte region [ffff888099cb1000, ffff888099cb1400) [ 64.663947][ T6760] The buggy address belongs to the page: [ 64.669591][ T6760] page:ffffea0002672c40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 64.679293][ T6760] flags: 0xfffe0000000200(slab) [ 64.684153][ T6760] raw: 00fffe0000000200 ffffea00027d25c8 ffffea00027a0dc8 ffff8880aa000c40 [ 64.692885][ T6760] raw: 0000000000000000 ffff888099cb1000 0000000100000002 0000000000000000 [ 64.701707][ T6760] page dumped because: kasan: bad access detected [ 64.708519][ T6760] [ 64.710871][ T6760] Memory state around the buggy address: [ 64.716627][ T6760] ffff888099cb1080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.724691][ T6760] ffff888099cb1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.732926][ T6760] >ffff888099cb1180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.741009][ T6760] ^ [ 64.748204][ T6760] ffff888099cb1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.756918][ T6760] ffff888099cb1280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.764992][ T6760] ================================================================== [ 64.773045][ T6760] Disabling lock debugging due to kernel taint [ 64.779338][ T6760] Kernel panic - not syncing: panic_on_warn set ... [ 64.785933][ T6760] CPU: 1 PID: 6760 Comm: kworker/u4:7 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 64.795822][ T6760] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.805973][ T6760] Workqueue: netns cleanup_net [ 64.810734][ T6760] Call Trace: [ 64.814033][ T6760] dump_stack+0x18f/0x20d [ 64.818388][ T6760] ? afs_wake_up_async_call+0x670/0x770 [ 64.823930][ T6760] ? afs_put_call+0xa40/0xa40 [ 64.828597][ T6760] panic+0x2e3/0x75c [ 64.832492][ T6760] ? __warn_printk+0xf3/0xf3 [ 64.840543][ T6760] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 64.846825][ T6760] ? trace_hardirqs_on+0x55/0x220 [ 64.852210][ T6760] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.857757][ T6760] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.863309][ T6760] ? afs_put_call+0xa40/0xa40 [ 64.868009][ T6760] end_report+0x4d/0x53 [ 64.872173][ T6760] kasan_report.cold+0xd/0x37 [ 64.876848][ T6760] ? rcu_read_lock_held_common+0x51/0xa0 [ 64.882480][ T6760] ? afs_wake_up_async_call+0x6aa/0x770 [ 64.888137][ T6760] afs_wake_up_async_call+0x6aa/0x770 [ 64.893760][ T6760] ? afs_close_socket+0x320/0x320 [ 64.898775][ T6760] ? afs_put_call+0xa40/0xa40 [ 64.903492][ T6760] rxrpc_notify_socket+0x1db/0x5d0 [ 64.908649][ T6760] ? afs_put_call+0xa40/0xa40 [ 64.913321][ T6760] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 64.919720][ T6760] rxrpc_call_completed+0xca/0xf0 [ 64.924770][ T6760] rxrpc_discard_prealloc+0x781/0xab0 [ 64.932424][ T6760] ? lock_sock_nested+0x94/0x110 [ 64.937608][ T6760] rxrpc_listen+0x147/0x360 [ 64.942165][ T6760] afs_close_socket+0x95/0x320 [ 64.946963][ T6760] ? afs_purge_servers+0x16d/0x300 [ 64.952183][ T6760] ? afs_rx_discard_new_call+0x50/0x50 [ 64.957657][ T6760] ? init_wait_var_entry+0x200/0x200 [ 64.962936][ T6760] ? rcu_read_lock_held_common+0xa0/0xa0 [ 64.968687][ T6760] ? check_preemption_disabled+0x38/0x220 [ 64.974761][ T6760] afs_net_exit+0x1bc/0x310 [ 64.979386][ T6760] ? afs_net_init+0xe30/0xe30 [ 64.984148][ T6760] ops_exit_list.isra.0+0xa8/0x150 [ 64.989525][ T6760] cleanup_net+0x511/0xa50 [ 64.994107][ T6760] ? unregister_pernet_device+0x70/0x70 [ 64.999867][ T6760] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 65.005876][ T6760] process_one_work+0x965/0x1690 [ 65.011341][ T6760] ? lock_release+0x800/0x800 [ 65.016012][ T6760] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.021654][ T6760] ? rwlock_bug.part.0+0x90/0x90 [ 65.026608][ T6760] worker_thread+0x96/0xe10 [ 65.031249][ T6760] ? process_one_work+0x1690/0x1690 [ 65.036568][ T6760] kthread+0x3b5/0x4a0 [ 65.040631][ T6760] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.046553][ T6760] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.052625][ T6760] ret_from_fork+0x1f/0x30 [ 65.058644][ T6760] Kernel Offset: disabled [ 65.062975][ T6760] Rebooting in 86400 seconds..