Warning: Permanently added '10.128.0.179' (ECDSA) to the list of known hosts. 2020/06/17 21:51:50 fuzzer started 2020/06/17 21:51:50 connecting to host at 10.128.0.26:45489 2020/06/17 21:51:50 checking machine... 2020/06/17 21:51:50 checking revisions... 2020/06/17 21:51:50 testing simple program... [ 60.384051][ T6834] IPVS: ftp: loaded support on port[0] = 21 2020/06/17 21:51:50 building call list... [ 60.725565][ T26] tipc: TX() has been purged, node left! [ 61.217163][ T26] ================================================================== [ 61.225546][ T26] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 61.233507][ T26] Write of size 1 at addr ffff8880a028a1e4 by task kworker/u4:2/26 [ 61.241394][ T26] [ 61.244006][ T26] CPU: 1 PID: 26 Comm: kworker/u4:2 Not tainted 5.8.0-rc1-syzkaller #0 [ 61.252619][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.262777][ T26] Workqueue: netns cleanup_net [ 61.267678][ T26] Call Trace: [ 61.271155][ T26] dump_stack+0x18f/0x20d [ 61.275618][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.281286][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.286926][ T26] ? afs_put_call+0xa40/0xa40 [ 61.291613][ T26] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.299130][ T26] ? vprintk_func+0x97/0x1a6 [ 61.303733][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.309288][ T26] kasan_report.cold+0x1f/0x37 [ 61.314318][ T26] ? rcu_read_lock_held_common+0x51/0xa0 [ 61.319958][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.325524][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 61.331045][ T26] ? afs_close_socket+0x320/0x320 [ 61.336087][ T26] ? afs_put_call+0xa40/0xa40 [ 61.340947][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 61.346161][ T26] ? afs_put_call+0xa40/0xa40 [ 61.351394][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.357937][ T26] rxrpc_call_completed+0xca/0xf0 [ 61.363012][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 61.368401][ T26] ? lock_sock_nested+0x94/0x110 [ 61.373540][ T26] rxrpc_listen+0x147/0x360 [ 61.378314][ T26] afs_close_socket+0x95/0x320 [ 61.383086][ T26] ? afs_purge_servers+0x16d/0x300 [ 61.388210][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 61.394068][ T26] ? init_wait_var_entry+0x200/0x200 [ 61.399574][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.405219][ T26] ? check_preemption_disabled+0x38/0x220 [ 61.411138][ T26] afs_net_exit+0x1bc/0x310 [ 61.415747][ T26] ? afs_net_init+0xe30/0xe30 [ 61.420428][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 61.425713][ T26] cleanup_net+0x511/0xa50 [ 61.430141][ T26] ? unregister_pernet_device+0x70/0x70 [ 61.435892][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.442066][ T26] process_one_work+0x965/0x1690 [ 61.447035][ T26] ? lock_release+0x800/0x800 [ 61.451810][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.457464][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 61.462491][ T26] worker_thread+0x96/0xe10 [ 61.467106][ T26] ? process_one_work+0x1690/0x1690 [ 61.472470][ T26] kthread+0x3b5/0x4a0 [ 61.476641][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.482510][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.488335][ T26] ret_from_fork+0x1f/0x30 [ 61.492769][ T26] [ 61.495336][ T26] Allocated by task 6834: [ 61.500332][ T26] save_stack+0x1b/0x40 [ 61.505053][ T26] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.510713][ T26] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.516209][ T26] afs_alloc_call+0x55/0x630 [ 61.520937][ T26] afs_charge_preallocation+0xe9/0x2d0 [ 61.526648][ T26] afs_open_socket+0x292/0x360 [ 61.531972][ T26] afs_net_init+0xa6c/0xe30 [ 61.536504][ T26] ops_init+0xaf/0x420 [ 61.540661][ T26] setup_net+0x2de/0x860 [ 61.544908][ T26] copy_net_ns+0x293/0x590 [ 61.549957][ T26] create_new_namespaces+0x3fb/0xb30 [ 61.555418][ T26] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.561057][ T26] ksys_unshare+0x43d/0x8e0 [ 61.565565][ T26] __x64_sys_unshare+0x2d/0x40 [ 61.570472][ T26] do_syscall_64+0x60/0xe0 [ 61.575127][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.581349][ T26] [ 61.583772][ T26] Freed by task 26: [ 61.587583][ T26] save_stack+0x1b/0x40 [ 61.592787][ T26] __kasan_slab_free+0xf7/0x140 [ 61.597885][ T26] kfree+0x109/0x2b0 [ 61.601992][ T26] afs_put_call+0x585/0xa40 [ 61.609506][ T26] rxrpc_discard_prealloc+0x764/0xab0 [ 61.614975][ T26] rxrpc_listen+0x147/0x360 [ 61.619484][ T26] afs_close_socket+0x95/0x320 [ 61.624282][ T26] afs_net_exit+0x1bc/0x310 [ 61.628912][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 61.634027][ T26] cleanup_net+0x511/0xa50 [ 61.638778][ T26] process_one_work+0x965/0x1690 [ 61.643722][ T26] worker_thread+0x96/0xe10 [ 61.648226][ T26] kthread+0x3b5/0x4a0 [ 61.652402][ T26] ret_from_fork+0x1f/0x30 [ 61.656914][ T26] [ 61.659250][ T26] The buggy address belongs to the object at ffff8880a028a000 [ 61.659250][ T26] which belongs to the cache kmalloc-1k of size 1024 [ 61.673917][ T26] The buggy address is located 484 bytes inside of [ 61.673917][ T26] 1024-byte region [ffff8880a028a000, ffff8880a028a400) [ 61.687727][ T26] The buggy address belongs to the page: [ 61.693740][ T26] page:ffffea000280a280 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 61.702965][ T26] flags: 0xfffe0000000200(slab) [ 61.708065][ T26] raw: 00fffe0000000200 ffffea00027bd9c8 ffffea00027f6648 ffff8880aa000c40 [ 61.716880][ T26] raw: 0000000000000000 ffff8880a028a000 0000000100000002 0000000000000000 [ 61.725994][ T26] page dumped because: kasan: bad access detected [ 61.732418][ T26] [ 61.734757][ T26] Memory state around the buggy address: [ 61.740404][ T26] ffff8880a028a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.748575][ T26] ffff8880a028a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.757043][ T26] >ffff8880a028a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.765102][ T26] ^ [ 61.772652][ T26] ffff8880a028a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.781074][ T26] ffff8880a028a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.790442][ T26] ================================================================== [ 61.800264][ T26] Disabling lock debugging due to kernel taint [ 61.807066][ T26] Kernel panic - not syncing: panic_on_warn set ... [ 61.813861][ T26] CPU: 1 PID: 26 Comm: kworker/u4:2 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 61.823893][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.834144][ T26] Workqueue: netns cleanup_net [ 61.838906][ T26] Call Trace: [ 61.842724][ T26] dump_stack+0x18f/0x20d [ 61.847209][ T26] ? afs_wake_up_async_call+0x680/0x770 [ 61.853134][ T26] ? afs_put_call+0xa40/0xa40 [ 61.858215][ T26] panic+0x2e3/0x75c [ 61.862300][ T26] ? __warn_printk+0xf3/0xf3 [ 61.867224][ T26] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 61.873876][ T26] ? trace_hardirqs_on+0x55/0x220 [ 61.878995][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.884935][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.891174][ T26] ? afs_put_call+0xa40/0xa40 [ 61.895947][ T26] end_report+0x4d/0x53 [ 61.900109][ T26] kasan_report.cold+0xd/0x37 [ 61.904811][ T26] ? rcu_read_lock_held_common+0x51/0xa0 [ 61.910442][ T26] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.916138][ T26] afs_wake_up_async_call+0x6aa/0x770 [ 61.921762][ T26] ? afs_close_socket+0x320/0x320 [ 61.926875][ T26] ? afs_put_call+0xa40/0xa40 [ 61.931555][ T26] rxrpc_notify_socket+0x1db/0x5d0 [ 61.936917][ T26] ? afs_put_call+0xa40/0xa40 [ 61.941602][ T26] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.948021][ T26] rxrpc_call_completed+0xca/0xf0 [ 61.953179][ T26] rxrpc_discard_prealloc+0x781/0xab0 [ 61.958556][ T26] ? lock_sock_nested+0x94/0x110 [ 61.963493][ T26] rxrpc_listen+0x147/0x360 [ 61.968000][ T26] afs_close_socket+0x95/0x320 [ 61.973122][ T26] ? afs_purge_servers+0x16d/0x300 [ 61.978323][ T26] ? afs_rx_discard_new_call+0x50/0x50 [ 61.984026][ T26] ? init_wait_var_entry+0x200/0x200 [ 61.989411][ T26] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.995333][ T26] ? check_preemption_disabled+0x38/0x220 [ 62.001359][ T26] afs_net_exit+0x1bc/0x310 [ 62.007442][ T26] ? afs_net_init+0xe30/0xe30 [ 62.012209][ T26] ops_exit_list.isra.0+0xa8/0x150 [ 62.017473][ T26] cleanup_net+0x511/0xa50 [ 62.022243][ T26] ? unregister_pernet_device+0x70/0x70 [ 62.028252][ T26] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.035612][ T26] process_one_work+0x965/0x1690 [ 62.040739][ T26] ? lock_release+0x800/0x800 [ 62.045853][ T26] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.052268][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 62.057372][ T26] worker_thread+0x96/0xe10 [ 62.062410][ T26] ? process_one_work+0x1690/0x1690 [ 62.068697][ T26] kthread+0x3b5/0x4a0 [ 62.072877][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.079605][ T26] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.085426][ T26] ret_from_fork+0x1f/0x30 [ 62.092539][ T26] Kernel Offset: disabled [ 62.098749][ T26] Rebooting in 86400 seconds..