Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts. 2020/06/19 17:56:57 fuzzer started 2020/06/19 17:56:58 connecting to host at 10.128.0.26:38857 2020/06/19 17:56:58 checking machine... 2020/06/19 17:56:58 checking revisions... 2020/06/19 17:56:58 testing simple program... syzkaller login: [ 60.998631][ T6802] IPVS: ftp: loaded support on port[0] = 21 2020/06/19 17:56:58 building call list... [ 61.351548][ T7] tipc: TX() has been purged, node left! [ 61.863899][ T7] ================================================================== [ 61.872149][ T7] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 61.880122][ T7] Write of size 1 at addr ffff88809489c9e4 by task kworker/u4:0/7 [ 61.888171][ T7] [ 61.890526][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc1-syzkaller #0 [ 61.898847][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.908913][ T7] Workqueue: netns cleanup_net [ 61.913667][ T7] Call Trace: [ 61.917047][ T7] dump_stack+0x18f/0x20d [ 61.921422][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.926969][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.932531][ T7] ? afs_put_call+0xa40/0xa40 [ 61.937211][ T7] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.944237][ T7] ? vprintk_func+0x97/0x1a6 [ 61.948833][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.954378][ T7] kasan_report.cold+0x1f/0x37 [ 61.959145][ T7] ? rcu_read_lock_held_common+0x51/0xa0 [ 61.964774][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.970581][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 61.975981][ T7] ? afs_close_socket+0x320/0x320 [ 61.981013][ T7] ? afs_put_call+0xa40/0xa40 [ 61.985718][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 61.991355][ T7] ? afs_put_call+0xa40/0xa40 [ 61.996038][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.002455][ T7] rxrpc_call_completed+0xca/0xf0 [ 62.007491][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 62.012870][ T7] ? lock_sock_nested+0x94/0x110 [ 62.017829][ T7] rxrpc_listen+0x147/0x360 [ 62.022419][ T7] afs_close_socket+0x95/0x320 [ 62.027184][ T7] ? afs_purge_servers+0x16d/0x300 [ 62.032306][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 62.037780][ T7] ? init_wait_var_entry+0x200/0x200 [ 62.043078][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.048716][ T7] ? check_preemption_disabled+0x38/0x220 [ 62.054443][ T7] afs_net_exit+0x1bc/0x310 [ 62.058944][ T7] ? afs_net_init+0xe30/0xe30 [ 62.063639][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 62.068840][ T7] cleanup_net+0x511/0xa50 [ 62.073257][ T7] ? unregister_pernet_device+0x70/0x70 [ 62.078806][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.084804][ T7] process_one_work+0x965/0x1690 [ 62.089761][ T7] ? lock_release+0x800/0x800 [ 62.094464][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.099838][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 62.104789][ T7] worker_thread+0x96/0xe10 [ 62.109313][ T7] ? process_one_work+0x1690/0x1690 [ 62.114513][ T7] kthread+0x3b5/0x4a0 [ 62.118583][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.124299][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.130022][ T7] ret_from_fork+0x1f/0x30 [ 62.134449][ T7] [ 62.136771][ T7] Allocated by task 6802: [ 62.141095][ T7] save_stack+0x1b/0x40 [ 62.145248][ T7] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 62.150875][ T7] kmem_cache_alloc_trace+0x153/0x7d0 [ 62.156328][ T7] afs_alloc_call+0x55/0x630 [ 62.160933][ T7] afs_charge_preallocation+0xe9/0x2d0 [ 62.166389][ T7] afs_open_socket+0x292/0x360 [ 62.171148][ T7] afs_net_init+0xa6c/0xe30 [ 62.175645][ T7] ops_init+0xaf/0x420 [ 62.179712][ T7] setup_net+0x2de/0x860 [ 62.184034][ T7] copy_net_ns+0x293/0x590 [ 62.188449][ T7] create_new_namespaces+0x3fb/0xb30 [ 62.193732][ T7] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 62.199359][ T7] ksys_unshare+0x43d/0x8e0 [ 62.203858][ T7] __x64_sys_unshare+0x2d/0x40 [ 62.208616][ T7] do_syscall_64+0x60/0xe0 [ 62.213031][ T7] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.219513][ T7] [ 62.221854][ T7] Freed by task 7: [ 62.225582][ T7] save_stack+0x1b/0x40 [ 62.229735][ T7] __kasan_slab_free+0xf7/0x140 [ 62.235186][ T7] kfree+0x109/0x2b0 [ 62.239080][ T7] afs_put_call+0x585/0xa40 [ 62.243589][ T7] rxrpc_discard_prealloc+0x764/0xab0 [ 62.248956][ T7] rxrpc_listen+0x147/0x360 [ 62.253456][ T7] afs_close_socket+0x95/0x320 [ 62.258211][ T7] afs_net_exit+0x1bc/0x310 [ 62.262714][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 62.267903][ T7] cleanup_net+0x511/0xa50 [ 62.272316][ T7] process_one_work+0x965/0x1690 [ 62.277249][ T7] worker_thread+0x96/0xe10 [ 62.282095][ T7] kthread+0x3b5/0x4a0 [ 62.286169][ T7] ret_from_fork+0x1f/0x30 [ 62.290586][ T7] [ 62.292919][ T7] The buggy address belongs to the object at ffff88809489c800 [ 62.292919][ T7] which belongs to the cache kmalloc-1k of size 1024 [ 62.306974][ T7] The buggy address is located 484 bytes inside of [ 62.306974][ T7] 1024-byte region [ffff88809489c800, ffff88809489cc00) [ 62.320324][ T7] The buggy address belongs to the page: [ 62.325953][ T7] page:ffffea0002522700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 62.335051][ T7] flags: 0xfffe0000000200(slab) [ 62.339910][ T7] raw: 00fffe0000000200 ffffea0002801b88 ffffea0002a1f7c8 ffff8880aa000c40 [ 62.348504][ T7] raw: 0000000000000000 ffff88809489c000 0000000100000002 0000000000000000 [ 62.357078][ T7] page dumped because: kasan: bad access detected [ 62.363573][ T7] [ 62.365901][ T7] Memory state around the buggy address: [ 62.371528][ T7] ffff88809489c880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.379942][ T7] ffff88809489c900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.388001][ T7] >ffff88809489c980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.396070][ T7] ^ [ 62.403258][ T7] ffff88809489ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.411333][ T7] ffff88809489ca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.419382][ T7] ================================================================== [ 62.427433][ T7] Disabling lock debugging due to kernel taint [ 62.433661][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 62.440256][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 62.449793][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.460029][ T7] Workqueue: netns cleanup_net [ 62.464813][ T7] Call Trace: [ 62.468106][ T7] dump_stack+0x18f/0x20d [ 62.472442][ T7] ? afs_wake_up_async_call+0x680/0x770 [ 62.477990][ T7] ? afs_put_call+0xa40/0xa40 [ 62.482682][ T7] panic+0x2e3/0x75c [ 62.486591][ T7] ? __warn_printk+0xf3/0xf3 [ 62.491185][ T7] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 62.497343][ T7] ? trace_hardirqs_on+0x55/0x220 [ 62.502386][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.507920][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.513456][ T7] ? afs_put_call+0xa40/0xa40 [ 62.518210][ T7] end_report+0x4d/0x53 [ 62.522493][ T7] kasan_report.cold+0xd/0x37 [ 62.527151][ T7] ? rcu_read_lock_held_common+0x51/0xa0 [ 62.532836][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.538457][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 62.543918][ T7] ? afs_close_socket+0x320/0x320 [ 62.549282][ T7] ? afs_put_call+0xa40/0xa40 [ 62.553965][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 62.559177][ T7] ? afs_put_call+0xa40/0xa40 [ 62.563933][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.570358][ T7] rxrpc_call_completed+0xca/0xf0 [ 62.575386][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 62.580816][ T7] ? lock_sock_nested+0x94/0x110 [ 62.585892][ T7] rxrpc_listen+0x147/0x360 [ 62.590898][ T7] afs_close_socket+0x95/0x320 [ 62.595661][ T7] ? afs_purge_servers+0x16d/0x300 [ 62.600848][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 62.606304][ T7] ? init_wait_var_entry+0x200/0x200 [ 62.611592][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.617213][ T7] ? check_preemption_disabled+0x38/0x220 [ 62.622935][ T7] afs_net_exit+0x1bc/0x310 [ 62.627425][ T7] ? afs_net_init+0xe30/0xe30 [ 62.632098][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 62.637315][ T7] cleanup_net+0x511/0xa50 [ 62.641725][ T7] ? unregister_pernet_device+0x70/0x70 [ 62.647267][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.653268][ T7] process_one_work+0x965/0x1690 [ 62.658223][ T7] ? lock_release+0x800/0x800 [ 62.663007][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.668488][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 62.673533][ T7] worker_thread+0x96/0xe10 [ 62.678031][ T7] ? process_one_work+0x1690/0x1690 [ 62.683338][ T7] kthread+0x3b5/0x4a0 [ 62.687402][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.693913][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.699637][ T7] ret_from_fork+0x1f/0x30 [ 62.705296][ T7] Kernel Offset: disabled [ 62.709692][ T7] Rebooting in 86400 seconds..