Warning: Permanently added '10.128.0.128' (ECDSA) to the list of known hosts. 2020/06/13 05:10:54 fuzzer started 2020/06/13 05:10:55 connecting to host at 10.128.0.26:45651 2020/06/13 05:10:55 checking machine... 2020/06/13 05:10:55 checking revisions... 2020/06/13 05:10:55 testing simple program... [ 57.876006][ T6812] IPVS: ftp: loaded support on port[0] = 21 2020/06/13 05:10:55 building call list... [ 58.241688][ T80] tipc: TX() has been purged, node left! [ 58.763791][ T80] ================================================================== [ 58.772281][ T80] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 58.780171][ T80] Write of size 1 at addr ffff8880a6c209e4 by task kworker/u4:3/80 [ 58.788144][ T80] [ 58.790734][ T80] CPU: 0 PID: 80 Comm: kworker/u4:3 Not tainted 5.7.0-next-20200613-syzkaller #0 [ 58.799839][ T80] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.809900][ T80] Workqueue: netns cleanup_net [ 58.814656][ T80] Call Trace: [ 58.817951][ T80] dump_stack+0x18f/0x20d [ 58.822282][ T80] ? afs_wake_up_async_call+0x6aa/0x770 [ 58.827823][ T80] ? afs_wake_up_async_call+0x6aa/0x770 [ 58.833361][ T80] ? afs_put_call+0xa40/0xa40 [ 58.838034][ T80] print_address_description.constprop.0.cold+0xd3/0x413 [ 58.845081][ T80] ? vprintk_func+0x97/0x1a6 [ 58.849674][ T80] ? afs_wake_up_async_call+0x6aa/0x770 [ 58.855303][ T80] kasan_report.cold+0x1f/0x37 [ 58.860067][ T80] ? rcu_read_lock_held_common+0x41/0xa0 [ 58.865695][ T80] ? afs_wake_up_async_call+0x6aa/0x770 [ 58.871243][ T80] afs_wake_up_async_call+0x6aa/0x770 [ 58.876607][ T80] ? afs_close_socket+0x320/0x320 [ 58.881636][ T80] ? afs_put_call+0xa40/0xa40 [ 58.886318][ T80] rxrpc_notify_socket+0x1db/0x5d0 [ 58.891437][ T80] ? afs_put_call+0xa40/0xa40 [ 58.896111][ T80] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 58.902525][ T80] rxrpc_call_completed+0xca/0xf0 [ 58.907605][ T80] rxrpc_discard_prealloc+0x781/0xab0 [ 58.912976][ T80] ? lock_sock_nested+0x94/0x110 [ 58.917912][ T80] rxrpc_listen+0x147/0x360 [ 58.922414][ T80] afs_close_socket+0x95/0x320 [ 58.927174][ T80] ? afs_purge_servers+0x16d/0x300 [ 58.932283][ T80] ? afs_rx_discard_new_call+0x50/0x50 [ 58.937742][ T80] ? init_wait_var_entry+0x200/0x200 [ 58.943030][ T80] ? rcu_read_lock_held_common+0xa0/0xa0 [ 58.948659][ T80] ? check_preemption_disabled+0x38/0x220 [ 58.954381][ T80] afs_net_exit+0x1bc/0x310 [ 58.958878][ T80] ? afs_net_init+0xe30/0xe30 [ 58.963563][ T80] ops_exit_list.isra.0+0xa8/0x150 [ 58.968676][ T80] cleanup_net+0x511/0xa50 [ 58.973091][ T80] ? unregister_pernet_device+0x70/0x70 [ 58.978639][ T80] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.984624][ T80] process_one_work+0x965/0x1690 [ 58.989594][ T80] ? lock_release+0x800/0x800 [ 58.994289][ T80] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.999667][ T80] ? rwlock_bug.part.0+0x90/0x90 [ 59.004613][ T80] worker_thread+0x96/0xe10 [ 59.009156][ T80] ? process_one_work+0x1690/0x1690 [ 59.014553][ T80] kthread+0x3b5/0x4a0 [ 59.018618][ T80] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.024351][ T80] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.030077][ T80] ret_from_fork+0x1f/0x30 [ 59.034512][ T80] [ 59.036876][ T80] Allocated by task 6812: [ 59.041233][ T80] save_stack+0x1b/0x40 [ 59.045412][ T80] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 59.051052][ T80] kmem_cache_alloc_trace+0x153/0x7d0 [ 59.056433][ T80] afs_alloc_call+0x55/0x630 [ 59.061106][ T80] afs_charge_preallocation+0xe9/0x2d0 [ 59.066590][ T80] afs_open_socket+0x292/0x360 [ 59.071355][ T80] afs_net_init+0xa6c/0xe30 [ 59.075883][ T80] ops_init+0xaf/0x420 [ 59.079949][ T80] setup_net+0x2de/0x860 [ 59.084203][ T80] copy_net_ns+0x293/0x590 [ 59.088645][ T80] create_new_namespaces+0x3fb/0xb30 [ 59.093953][ T80] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 59.099594][ T80] ksys_unshare+0x43d/0x8e0 [ 59.104098][ T80] __x64_sys_unshare+0x2d/0x40 [ 59.108871][ T80] do_syscall_64+0x60/0xe0 [ 59.113378][ T80] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.119259][ T80] [ 59.121613][ T80] Freed by task 80: [ 59.125422][ T80] save_stack+0x1b/0x40 [ 59.129591][ T80] __kasan_slab_free+0xf7/0x140 [ 59.134435][ T80] kfree+0x109/0x2b0 [ 59.138326][ T80] afs_put_call+0x585/0xa40 [ 59.142845][ T80] rxrpc_discard_prealloc+0x764/0xab0 [ 59.148215][ T80] rxrpc_listen+0x147/0x360 [ 59.152716][ T80] afs_close_socket+0x95/0x320 [ 59.157474][ T80] afs_net_exit+0x1bc/0x310 [ 59.161972][ T80] ops_exit_list.isra.0+0xa8/0x150 [ 59.167074][ T80] cleanup_net+0x511/0xa50 [ 59.171507][ T80] process_one_work+0x965/0x1690 [ 59.176438][ T80] worker_thread+0x96/0xe10 [ 59.180934][ T80] kthread+0x3b5/0x4a0 [ 59.185002][ T80] ret_from_fork+0x1f/0x30 [ 59.189402][ T80] [ 59.191727][ T80] The buggy address belongs to the object at ffff8880a6c20800 [ 59.191727][ T80] which belongs to the cache kmalloc-1k of size 1024 [ 59.205781][ T80] The buggy address is located 484 bytes inside of [ 59.205781][ T80] 1024-byte region [ffff8880a6c20800, ffff8880a6c20c00) [ 59.219171][ T80] The buggy address belongs to the page: [ 59.224801][ T80] page:ffffea00029b0800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 59.233901][ T80] flags: 0xfffe0000000200(slab) [ 59.238752][ T80] raw: 00fffe0000000200 ffffea00027bbac8 ffffea00028c8b08 ffff8880aa000c40 [ 59.247336][ T80] raw: 0000000000000000 ffff8880a6c20000 0000000100000002 0000000000000000 [ 59.255908][ T80] page dumped because: kasan: bad access detected [ 59.262327][ T80] [ 59.264648][ T80] Memory state around the buggy address: [ 59.270273][ T80] ffff8880a6c20880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.278351][ T80] ffff8880a6c20900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.286407][ T80] >ffff8880a6c20980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.294459][ T80] ^ [ 59.301649][ T80] ffff8880a6c20a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.309707][ T80] ffff8880a6c20a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.317756][ T80] ================================================================== [ 59.325805][ T80] Disabling lock debugging due to kernel taint [ 59.332688][ T80] Kernel panic - not syncing: panic_on_warn set ... [ 59.339267][ T80] CPU: 0 PID: 80 Comm: kworker/u4:3 Tainted: G B 5.7.0-next-20200613-syzkaller #0 [ 59.349763][ T80] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.359813][ T80] Workqueue: netns cleanup_net [ 59.364567][ T80] Call Trace: [ 59.367955][ T80] dump_stack+0x18f/0x20d [ 59.372282][ T80] ? afs_wake_up_async_call+0x6a0/0x770 [ 59.377814][ T80] ? afs_put_call+0xa40/0xa40 [ 59.382482][ T80] panic+0x2e3/0x75c [ 59.386367][ T80] ? __warn_printk+0xf3/0xf3 [ 59.390993][ T80] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 59.397143][ T80] ? trace_hardirqs_on+0x55/0x220 [ 59.402179][ T80] ? afs_wake_up_async_call+0x6aa/0x770 [ 59.407798][ T80] ? afs_wake_up_async_call+0x6aa/0x770 [ 59.413365][ T80] ? afs_put_call+0xa40/0xa40 [ 59.418038][ T80] end_report+0x4d/0x53 [ 59.422187][ T80] kasan_report.cold+0xd/0x37 [ 59.426859][ T80] ? rcu_read_lock_held_common+0x41/0xa0 [ 59.432500][ T80] ? afs_wake_up_async_call+0x6aa/0x770 [ 59.438049][ T80] afs_wake_up_async_call+0x6aa/0x770 [ 59.443413][ T80] ? afs_close_socket+0x320/0x320 [ 59.448447][ T80] ? afs_put_call+0xa40/0xa40 [ 59.453136][ T80] rxrpc_notify_socket+0x1db/0x5d0 [ 59.458263][ T80] ? afs_put_call+0xa40/0xa40 [ 59.462938][ T80] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 59.469351][ T80] rxrpc_call_completed+0xca/0xf0 [ 59.474368][ T80] rxrpc_discard_prealloc+0x781/0xab0 [ 59.479731][ T80] ? lock_sock_nested+0x94/0x110 [ 59.484675][ T80] rxrpc_listen+0x147/0x360 [ 59.489170][ T80] afs_close_socket+0x95/0x320 [ 59.493932][ T80] ? afs_purge_servers+0x16d/0x300 [ 59.499044][ T80] ? afs_rx_discard_new_call+0x50/0x50 [ 59.504528][ T80] ? init_wait_var_entry+0x200/0x200 [ 59.510697][ T80] ? rcu_read_lock_held_common+0xa0/0xa0 [ 59.516326][ T80] ? check_preemption_disabled+0x38/0x220 [ 59.522042][ T80] afs_net_exit+0x1bc/0x310 [ 59.526627][ T80] ? afs_net_init+0xe30/0xe30 [ 59.531334][ T80] ops_exit_list.isra.0+0xa8/0x150 [ 59.536547][ T80] cleanup_net+0x511/0xa50 [ 59.540958][ T80] ? unregister_pernet_device+0x70/0x70 [ 59.546497][ T80] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.552480][ T80] process_one_work+0x965/0x1690 [ 59.557531][ T80] ? lock_release+0x800/0x800 [ 59.562293][ T80] ? pwq_dec_nr_in_flight+0x310/0x310 [ 59.567663][ T80] ? rwlock_bug.part.0+0x90/0x90 [ 59.572600][ T80] worker_thread+0x96/0xe10 [ 59.577112][ T80] ? process_one_work+0x1690/0x1690 [ 59.582308][ T80] kthread+0x3b5/0x4a0 [ 59.586391][ T80] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.592107][ T80] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.597823][ T80] ret_from_fork+0x1f/0x30 [ 59.603618][ T80] Kernel Offset: disabled [ 59.607975][ T80] Rebooting in 86400 seconds..