Warning: Permanently added '10.128.15.202' (ECDSA) to the list of known hosts. 2020/06/19 08:21:08 fuzzer started 2020/06/19 08:21:08 connecting to host at 10.128.0.26:33933 2020/06/19 08:21:08 checking machine... 2020/06/19 08:21:08 checking revisions... 2020/06/19 08:21:08 testing simple program... [ 61.910027][ T6810] IPVS: ftp: loaded support on port[0] = 21 2020/06/19 08:21:09 building call list... [ 62.346995][ T606] tipc: TX() has been purged, node left! [ 62.859563][ T606] ================================================================== [ 62.868169][ T606] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 62.876056][ T606] Write of size 1 at addr ffff88809fe439e4 by task kworker/u4:5/606 [ 62.884026][ T606] [ 62.886355][ T606] CPU: 0 PID: 606 Comm: kworker/u4:5 Not tainted 5.8.0-rc1-syzkaller #0 [ 62.894678][ T606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.905273][ T606] Workqueue: netns cleanup_net [ 62.910036][ T606] Call Trace: [ 62.913328][ T606] dump_stack+0x18f/0x20d [ 62.917669][ T606] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.923218][ T606] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.928758][ T606] ? afs_put_call+0xa40/0xa40 [ 62.933520][ T606] print_address_description.constprop.0.cold+0xd3/0x413 [ 62.940544][ T606] ? vprintk_func+0x97/0x1a6 [ 62.945744][ T606] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.951386][ T606] kasan_report.cold+0x1f/0x37 [ 62.956162][ T606] ? rcu_read_lock_held_common+0x51/0xa0 [ 62.961792][ T606] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.967347][ T606] afs_wake_up_async_call+0x6aa/0x770 [ 62.972773][ T606] ? afs_close_socket+0x320/0x320 [ 62.977797][ T606] ? afs_put_call+0xa40/0xa40 [ 62.982484][ T606] rxrpc_notify_socket+0x1db/0x5d0 [ 62.987613][ T606] ? afs_put_call+0xa40/0xa40 [ 62.992294][ T606] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.998724][ T606] rxrpc_call_completed+0xca/0xf0 [ 63.003755][ T606] rxrpc_discard_prealloc+0x781/0xab0 [ 63.009132][ T606] ? lock_sock_nested+0x94/0x110 [ 63.014071][ T606] rxrpc_listen+0x147/0x360 [ 63.018582][ T606] afs_close_socket+0x95/0x320 [ 63.023349][ T606] ? afs_purge_servers+0x16d/0x300 [ 63.028546][ T606] ? afs_rx_discard_new_call+0x50/0x50 [ 63.034006][ T606] ? init_wait_var_entry+0x200/0x200 [ 63.039296][ T606] ? rcu_read_lock_held_common+0xa0/0xa0 [ 63.044929][ T606] ? check_preemption_disabled+0x38/0x220 [ 63.050843][ T606] afs_net_exit+0x1bc/0x310 [ 63.055412][ T606] ? afs_net_init+0xe30/0xe30 [ 63.060109][ T606] ops_exit_list.isra.0+0xa8/0x150 [ 63.065238][ T606] cleanup_net+0x511/0xa50 [ 63.069661][ T606] ? unregister_pernet_device+0x70/0x70 [ 63.075213][ T606] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.081217][ T606] process_one_work+0x965/0x1690 [ 63.086164][ T606] ? lock_release+0x800/0x800 [ 63.091271][ T606] ? pwq_dec_nr_in_flight+0x310/0x310 [ 63.096840][ T606] ? rwlock_bug.part.0+0x90/0x90 [ 63.101930][ T606] worker_thread+0x96/0xe10 [ 63.106754][ T606] ? process_one_work+0x1690/0x1690 [ 63.112061][ T606] kthread+0x3b5/0x4a0 [ 63.116395][ T606] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.122112][ T606] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.127920][ T606] ret_from_fork+0x1f/0x30 [ 63.132350][ T606] [ 63.134679][ T606] Allocated by task 6810: [ 63.139092][ T606] save_stack+0x1b/0x40 [ 63.143242][ T606] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 63.148882][ T606] kmem_cache_alloc_trace+0x153/0x7d0 [ 63.154263][ T606] afs_alloc_call+0x55/0x630 [ 63.158846][ T606] afs_charge_preallocation+0xe9/0x2d0 [ 63.164644][ T606] afs_open_socket+0x292/0x360 [ 63.169488][ T606] afs_net_init+0xa6c/0xe30 [ 63.173985][ T606] ops_init+0xaf/0x420 [ 63.178155][ T606] setup_net+0x2de/0x860 [ 63.182409][ T606] copy_net_ns+0x293/0x590 [ 63.186838][ T606] create_new_namespaces+0x3fb/0xb30 [ 63.192143][ T606] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 63.197863][ T606] ksys_unshare+0x43d/0x8e0 [ 63.202442][ T606] __x64_sys_unshare+0x2d/0x40 [ 63.207376][ T606] do_syscall_64+0x60/0xe0 [ 63.211789][ T606] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 63.217680][ T606] [ 63.220000][ T606] Freed by task 606: [ 63.224150][ T606] save_stack+0x1b/0x40 [ 63.228662][ T606] __kasan_slab_free+0xf7/0x140 [ 63.233752][ T606] kfree+0x109/0x2b0 [ 63.238875][ T606] afs_put_call+0x585/0xa40 [ 63.243383][ T606] rxrpc_discard_prealloc+0x764/0xab0 [ 63.249142][ T606] rxrpc_listen+0x147/0x360 [ 63.253747][ T606] afs_close_socket+0x95/0x320 [ 63.259408][ T606] afs_net_exit+0x1bc/0x310 [ 63.263985][ T606] ops_exit_list.isra.0+0xa8/0x150 [ 63.269109][ T606] cleanup_net+0x511/0xa50 [ 63.273565][ T606] process_one_work+0x965/0x1690 [ 63.278500][ T606] worker_thread+0x96/0xe10 [ 63.283261][ T606] kthread+0x3b5/0x4a0 [ 63.287437][ T606] ret_from_fork+0x1f/0x30 [ 63.291927][ T606] [ 63.294339][ T606] The buggy address belongs to the object at ffff88809fe43800 [ 63.294339][ T606] which belongs to the cache kmalloc-1k of size 1024 [ 63.308994][ T606] The buggy address is located 484 bytes inside of [ 63.308994][ T606] 1024-byte region [ffff88809fe43800, ffff88809fe43c00) [ 63.322944][ T606] The buggy address belongs to the page: [ 63.328587][ T606] page:ffffea00027f90c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88809fe43000 [ 63.339085][ T606] flags: 0xfffe0000000200(slab) [ 63.343965][ T606] raw: 00fffe0000000200 ffffea00027f5708 ffffea00027b9ec8 ffff8880aa000c40 [ 63.352551][ T606] raw: ffff88809fe43000 ffff88809fe43000 0000000100000001 0000000000000000 [ 63.362323][ T606] page dumped because: kasan: bad access detected [ 63.368927][ T606] [ 63.371376][ T606] Memory state around the buggy address: [ 63.377144][ T606] ffff88809fe43880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.385302][ T606] ffff88809fe43900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.393458][ T606] >ffff88809fe43980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.401801][ T606] ^ [ 63.409002][ T606] ffff88809fe43a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.417069][ T606] ffff88809fe43a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.425401][ T606] ================================================================== [ 63.433546][ T606] Disabling lock debugging due to kernel taint [ 63.439846][ T606] Kernel panic - not syncing: panic_on_warn set ... [ 63.446444][ T606] CPU: 0 PID: 606 Comm: kworker/u4:5 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 63.456274][ T606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.466342][ T606] Workqueue: netns cleanup_net [ 63.471106][ T606] Call Trace: [ 63.474400][ T606] dump_stack+0x18f/0x20d [ 63.478749][ T606] ? afs_wake_up_async_call+0x670/0x770 [ 63.484298][ T606] ? afs_put_call+0xa40/0xa40 [ 63.489010][ T606] panic+0x2e3/0x75c [ 63.492916][ T606] ? __warn_printk+0xf3/0xf3 [ 63.497519][ T606] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 63.505065][ T606] ? trace_hardirqs_on+0x55/0x220 [ 63.510091][ T606] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.515631][ T606] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.521270][ T606] ? afs_put_call+0xa40/0xa40 [ 63.526000][ T606] end_report+0x4d/0x53 [ 63.530425][ T606] kasan_report.cold+0xd/0x37 [ 63.535207][ T606] ? rcu_read_lock_held_common+0x51/0xa0 [ 63.540968][ T606] ? afs_wake_up_async_call+0x6aa/0x770 [ 63.546537][ T606] afs_wake_up_async_call+0x6aa/0x770 [ 63.551934][ T606] ? afs_close_socket+0x320/0x320 [ 63.557050][ T606] ? afs_put_call+0xa40/0xa40 [ 63.561760][ T606] rxrpc_notify_socket+0x1db/0x5d0 [ 63.566959][ T606] ? afs_put_call+0xa40/0xa40 [ 63.571734][ T606] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 63.578709][ T606] rxrpc_call_completed+0xca/0xf0 [ 63.583874][ T606] rxrpc_discard_prealloc+0x781/0xab0 [ 63.589588][ T606] ? lock_sock_nested+0x94/0x110 [ 63.594529][ T606] rxrpc_listen+0x147/0x360 [ 63.599045][ T606] afs_close_socket+0x95/0x320 [ 63.603801][ T606] ? afs_purge_servers+0x16d/0x300 [ 63.609019][ T606] ? afs_rx_discard_new_call+0x50/0x50 [ 63.614708][ T606] ? init_wait_var_entry+0x200/0x200 [ 63.620451][ T606] ? rcu_read_lock_held_common+0xa0/0xa0 [ 63.626094][ T606] ? check_preemption_disabled+0x38/0x220 [ 63.631902][ T606] afs_net_exit+0x1bc/0x310 [ 63.636531][ T606] ? afs_net_init+0xe30/0xe30 [ 63.641196][ T606] ops_exit_list.isra.0+0xa8/0x150 [ 63.646424][ T606] cleanup_net+0x511/0xa50 [ 63.650914][ T606] ? unregister_pernet_device+0x70/0x70 [ 63.656665][ T606] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 63.662641][ T606] process_one_work+0x965/0x1690 [ 63.667925][ T606] ? lock_release+0x800/0x800 [ 63.672737][ T606] ? pwq_dec_nr_in_flight+0x310/0x310 [ 63.678109][ T606] ? rwlock_bug.part.0+0x90/0x90 [ 63.683145][ T606] worker_thread+0x96/0xe10 [ 63.687740][ T606] ? process_one_work+0x1690/0x1690 [ 63.693201][ T606] kthread+0x3b5/0x4a0 [ 63.697274][ T606] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.702974][ T606] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 63.709100][ T606] ret_from_fork+0x1f/0x30 [ 63.715797][ T606] Kernel Offset: disabled [ 63.720446][ T606] Rebooting in 86400 seconds..