Warning: Permanently added '10.128.1.46' (ECDSA) to the list of known hosts. 2020/06/21 15:24:38 fuzzer started 2020/06/21 15:24:38 connecting to host at 10.128.0.26:46533 2020/06/21 15:24:38 checking machine... 2020/06/21 15:24:38 checking revisions... 2020/06/21 15:24:38 testing simple program... [ 60.689619][ T6807] IPVS: ftp: loaded support on port[0] = 21 2020/06/21 15:24:38 building call list... [ 61.069161][ T26] tipc: TX() has been purged, node left! [ 61.581305][ T26] ================================================================== [ 61.589537][ T26] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 61.597420][ T26] Write of size 1 at addr ffff8880a663c9e4 by task kworker/u4:2/26 [ 61.605291][ T26] [ 61.607647][ T26] CPU: 1 PID: 26 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 61.615873][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.625941][ T26] Workqueue: netns cleanup_net [ 61.630691][ T26] Call Trace: [ 61.633992][ T26] dump_stack+0x18f/0x20d [ 61.638336][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.643877][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.649449][ T26] ? afs_put_call+0xa40/0xa40 [ 61.654122][ T26] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.661231][ T26] ? vprintk_func+0x97/0x1a6 [ 61.665824][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.671364][ T26] kasan_report.cold+0x1f/0x37 [ 61.676131][ T26] ? rcu_read_lock_held_common+0x51/0xa0 [ 61.681757][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.687311][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 61.692675][ T26] ? afs_close_socket+0x320/0x320 [ 61.697717][ T26] ? afs_put_call+0xa40/0xa40 [ 61.702405][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 61.707530][ T26] ? afs_put_call+0xa40/0xa40 [ 61.712214][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.718631][ T26] rxrpc_call_completed+0xca/0xf0 [ 61.723676][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 61.729139][ T26] ? lock_sock_nested+0x94/0x110 [ 61.734079][ T26] rxrpc_listen+0x147/0x360 [ 61.738582][ T26] afs_close_socket+0x95/0x320 [ 61.743339][ T26] ? afs_purge_servers+0x181/0x330 [ 61.748449][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 61.753907][ T26] ? init_wait_var_entry+0x200/0x200 [ 61.759212][ T26] afs_net_exit+0x1c4/0x310 [ 61.763886][ T26] ? afs_net_init+0xe90/0xe90 [ 61.768559][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 61.773706][ T26] cleanup_net+0x511/0xa50 [ 61.778664][ T26] ? unregister_pernet_device+0x70/0x70 [ 61.784213][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.790197][ T26] process_one_work+0x965/0x1690 [ 61.795142][ T26] ? lock_release+0x800/0x800 [ 61.799904][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.805275][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 61.810224][ T26] worker_thread+0x96/0xe10 [ 61.814742][ T26] ? process_one_work+0x1690/0x1690 [ 61.819940][ T26] kthread+0x3b5/0x4a0 [ 61.824007][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.829740][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.835460][ T26] ret_from_fork+0x1f/0x30 [ 61.839880][ T26] [ 61.842201][ T26] Allocated by task 6807: [ 61.846525][ T26] save_stack+0x1b/0x40 [ 61.850677][ T26] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.856914][ T26] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.862278][ T26] afs_alloc_call+0x55/0x630 [ 61.866859][ T26] afs_charge_preallocation+0xe9/0x2d0 [ 61.872308][ T26] afs_open_socket+0x292/0x360 [ 61.877161][ T26] afs_net_init+0xab4/0xe90 [ 61.881655][ T26] ops_init+0xaf/0x420 [ 61.885718][ T26] setup_net+0x2de/0x860 [ 61.889954][ T26] copy_net_ns+0x293/0x590 [ 61.894365][ T26] create_new_namespaces+0x3fb/0xb30 [ 61.899646][ T26] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.905280][ T26] ksys_unshare+0x43d/0x8e0 [ 61.909782][ T26] __x64_sys_unshare+0x2d/0x40 [ 61.914548][ T26] do_syscall_64+0x60/0xe0 [ 61.918974][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.924860][ T26] [ 61.927183][ T26] Freed by task 26: [ 61.931000][ T26] save_stack+0x1b/0x40 [ 61.935169][ T26] __kasan_slab_free+0xf7/0x140 [ 61.940056][ T26] kfree+0x109/0x2b0 [ 61.944150][ T26] afs_put_call+0x585/0xa40 [ 61.948654][ T26] rxrpc_discard_prealloc+0x764/0xab0 [ 61.954153][ T26] rxrpc_listen+0x147/0x360 [ 61.958656][ T26] afs_close_socket+0x95/0x320 [ 61.963434][ T26] afs_net_exit+0x1c4/0x310 [ 61.967973][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 61.973100][ T26] cleanup_net+0x511/0xa50 [ 61.977630][ T26] process_one_work+0x965/0x1690 [ 61.982562][ T26] worker_thread+0x96/0xe10 [ 61.987047][ T26] kthread+0x3b5/0x4a0 [ 61.991126][ T26] ret_from_fork+0x1f/0x30 [ 61.995538][ T26] [ 61.997864][ T26] The buggy address belongs to the object at ffff8880a663c800 [ 61.997864][ T26] which belongs to the cache kmalloc-1k of size 1024 [ 62.011955][ T26] The buggy address is located 484 bytes inside of [ 62.011955][ T26] 1024-byte region [ffff8880a663c800, ffff8880a663cc00) [ 62.025326][ T26] The buggy address belongs to the page: [ 62.030962][ T26] page:ffffea0002998f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 62.040052][ T26] flags: 0xfffe0000000200(slab) [ 62.044904][ T26] raw: 00fffe0000000200 ffffea00026c7e88 ffffea00027f7708 ffff8880aa000c40 [ 62.053487][ T26] raw: 0000000000000000 ffff8880a663c000 0000000100000002 0000000000000000 [ 62.062082][ T26] page dumped because: kasan: bad access detected [ 62.068481][ T26] [ 62.070801][ T26] Memory state around the buggy address: [ 62.076544][ T26] ffff8880a663c880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.084799][ T26] ffff8880a663c900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.092855][ T26] >ffff8880a663c980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.101195][ T26] ^ [ 62.108388][ T26] ffff8880a663ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.116457][ T26] ffff8880a663ca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.124512][ T26] ================================================================== [ 62.132565][ T26] Disabling lock debugging due to kernel taint [ 62.138748][ T26] Kernel panic - not syncing: panic_on_warn set ... [ 62.145343][ T26] CPU: 1 PID: 26 Comm: kworker/u4:2 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 62.154951][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.165003][ T26] Workqueue: netns cleanup_net [ 62.169749][ T26] Call Trace: [ 62.173035][ T26] dump_stack+0x18f/0x20d [ 62.177359][ T26] ? afs_wake_up_async_call+0x5c0/0x770 [ 62.182910][ T26] ? afs_put_call+0xa40/0xa40 [ 62.187575][ T26] panic+0x2e3/0x75c [ 62.191461][ T26] ? __warn_printk+0xf3/0xf3 [ 62.196049][ T26] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 62.202197][ T26] ? trace_hardirqs_on+0x55/0x220 [ 62.207214][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.212747][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.218278][ T26] ? afs_put_call+0xa40/0xa40 [ 62.222948][ T26] end_report+0x4d/0x53 [ 62.227105][ T26] kasan_report.cold+0xd/0x37 [ 62.231873][ T26] ? rcu_read_lock_held_common+0x51/0xa0 [ 62.237503][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.243040][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 62.248400][ T26] ? afs_close_socket+0x320/0x320 [ 62.253422][ T26] ? afs_put_call+0xa40/0xa40 [ 62.258092][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 62.263193][ T26] ? afs_put_call+0xa40/0xa40 [ 62.267867][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.274271][ T26] rxrpc_call_completed+0xca/0xf0 [ 62.279289][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 62.284652][ T26] ? lock_sock_nested+0x94/0x110 [ 62.289582][ T26] rxrpc_listen+0x147/0x360 [ 62.294075][ T26] afs_close_socket+0x95/0x320 [ 62.298828][ T26] ? afs_purge_servers+0x181/0x330 [ 62.303935][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 62.309383][ T26] ? init_wait_var_entry+0x200/0x200 [ 62.314661][ T26] afs_net_exit+0x1c4/0x310 [ 62.319163][ T26] ? afs_net_init+0xe90/0xe90 [ 62.323827][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 62.328930][ T26] cleanup_net+0x511/0xa50 [ 62.333337][ T26] ? unregister_pernet_device+0x70/0x70 [ 62.338874][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.344851][ T26] process_one_work+0x965/0x1690 [ 62.349785][ T26] ? lock_release+0x800/0x800 [ 62.354455][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.359816][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 62.364749][ T26] worker_thread+0x96/0xe10 [ 62.369252][ T26] ? process_one_work+0x1690/0x1690 [ 62.374442][ T26] kthread+0x3b5/0x4a0 [ 62.378501][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.384208][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.389919][ T26] ret_from_fork+0x1f/0x30 [ 62.395885][ T26] Kernel Offset: disabled [ 62.400202][ T26] Rebooting in 86400 seconds..