Warning: Permanently added '[localhost]:1569' (ECDSA) to the list of known hosts. 2020/06/24 12:33:21 fuzzer started 2020/06/24 12:33:22 connecting to host at 10.0.2.10:33925 2020/06/24 12:33:22 checking machine... 2020/06/24 12:33:22 checking revisions... 2020/06/24 12:33:22 testing simple program... syzkaller login: [ 94.166399][ T8224] IPVS: ftp: loaded support on port[0] = 21 2020/06/24 12:33:23 building call list... [ 94.657670][ T8] tipc: TX() has been purged, node left! [ 95.514695][ T8] ================================================================== [ 95.516396][ T8] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 95.516396][ T8] Write of size 1 at addr ffff8880223081e4 by task kworker/u16:0/8 [ 95.545048][ T8] [ 95.545048][ T8] CPU: 2 PID: 8 Comm: kworker/u16:0 Not tainted 5.8.0-rc2-syzkaller #0 [ 95.556950][ T8] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 95.587653][ T8] Workqueue: netns cleanup_net [ 95.587653][ T8] Call Trace: [ 95.587653][ T8] dump_stack+0x18f/0x20d [ 95.606654][ T8] ? afs_wake_up_async_call+0x6aa/0x770 [ 95.606654][ T8] ? afs_wake_up_async_call+0x6aa/0x770 [ 95.606654][ T8] ? afs_put_call+0xa40/0xa40 [ 95.626665][ T8] print_address_description.constprop.0.cold+0xd3/0x413 [ 95.626665][ T8] ? vprintk_func+0x97/0x1a6 [ 95.626665][ T8] ? afs_wake_up_async_call+0x6aa/0x770 [ 95.626665][ T8] kasan_report.cold+0x1f/0x37 [ 95.626665][ T8] ? rcu_read_lock_held_common+0x71/0xa0 [ 95.626665][ T8] ? afs_wake_up_async_call+0x6aa/0x770 [ 95.626665][ T8] afs_wake_up_async_call+0x6aa/0x770 [ 95.689452][ T8] ? afs_close_socket+0x320/0x320 [ 95.689452][ T8] ? afs_put_call+0xa40/0xa40 [ 95.689452][ T8] rxrpc_notify_socket+0x1db/0x5d0 [ 95.718692][ T8] ? afs_put_call+0xa40/0xa40 [ 95.729690][ T8] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 95.729690][ T8] rxrpc_call_completed+0xca/0xf0 [ 95.729690][ T8] rxrpc_discard_prealloc+0x781/0xab0 [ 95.729690][ T8] ? lock_sock_nested+0x94/0x110 [ 95.729690][ T8] rxrpc_listen+0x147/0x360 [ 95.729690][ T8] afs_close_socket+0x95/0x320 [ 95.729690][ T8] ? afs_purge_servers+0x181/0x330 [ 95.825787][ T8] ? afs_rx_discard_new_call+0x50/0x50 [ 95.825787][ T8] ? init_wait_var_entry+0x200/0x200 [ 95.825787][ T8] afs_net_exit+0x1c4/0x310 [ 95.825787][ T8] ? afs_net_init+0xe90/0xe90 [ 95.825787][ T8] ops_exit_list.isra.0+0xa8/0x150 [ 95.825787][ T8] cleanup_net+0x511/0xa50 [ 95.825787][ T8] ? unregister_pernet_device+0x70/0x70 [ 95.825787][ T8] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 95.825787][ T8] process_one_work+0x965/0x1690 [ 95.825787][ T8] ? lock_release+0x800/0x800 [ 95.825787][ T8] ? pwq_dec_nr_in_flight+0x310/0x310 [ 95.825787][ T8] ? rwlock_bug.part.0+0x90/0x90 [ 95.825787][ T8] worker_thread+0x96/0xe10 [ 95.825787][ T8] ? process_one_work+0x1690/0x1690 [ 95.825787][ T8] kthread+0x3b5/0x4a0 [ 95.825787][ T8] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 95.956782][ T8] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 95.956782][ T8] ret_from_fork+0x1f/0x30 [ 95.956782][ T8] [ 95.956782][ T8] Allocated by task 8224: [ 95.956782][ T8] save_stack+0x1b/0x40 [ 95.956782][ T8] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 95.956782][ T8] kmem_cache_alloc_trace+0x153/0x7d0 [ 95.956782][ T8] afs_alloc_call+0x55/0x630 [ 95.956782][ T8] afs_charge_preallocation+0xe9/0x2d0 [ 95.956782][ T8] afs_open_socket+0x292/0x360 [ 96.036807][ T8] afs_net_init+0xab4/0xe90 [ 96.036807][ T8] ops_init+0xaf/0x420 [ 96.036807][ T8] setup_net+0x2de/0x860 [ 96.036807][ T8] copy_net_ns+0x293/0x590 [ 96.036807][ T8] create_new_namespaces+0x3fb/0xb30 [ 96.036807][ T8] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 96.036807][ T8] ksys_unshare+0x43d/0x8e0 [ 96.036807][ T8] __ia32_sys_unshare+0x2c/0x40 [ 96.036807][ T8] do_syscall_32_irqs_on+0x3f/0x60 [ 96.036807][ T8] do_fast_syscall_32+0x7f/0x120 [ 96.036807][ T8] entry_SYSENTER_compat+0x6d/0x7c [ 96.036807][ T8] [ 96.036807][ T8] Freed by task 8: [ 96.036807][ T8] save_stack+0x1b/0x40 [ 96.036807][ T8] __kasan_slab_free+0xf7/0x140 [ 96.036807][ T8] kfree+0x109/0x2b0 [ 96.036807][ T8] afs_put_call+0x585/0xa40 [ 96.036807][ T8] rxrpc_discard_prealloc+0x764/0xab0 [ 96.036807][ T8] rxrpc_listen+0x147/0x360 [ 96.036807][ T8] afs_close_socket+0x95/0x320 [ 96.036807][ T8] afs_net_exit+0x1c4/0x310 [ 96.036807][ T8] ops_exit_list.isra.0+0xa8/0x150 [ 96.036807][ T8] cleanup_net+0x511/0xa50 [ 96.036807][ T8] process_one_work+0x965/0x1690 [ 96.036807][ T8] worker_thread+0x96/0xe10 [ 96.036807][ T8] kthread+0x3b5/0x4a0 [ 96.036807][ T8] ret_from_fork+0x1f/0x30 [ 96.036807][ T8] [ 96.036807][ T8] The buggy address belongs to the object at ffff888022308000 [ 96.036807][ T8] which belongs to the cache kmalloc-1k of size 1024 [ 96.231844][ T8] The buggy address is located 484 bytes inside of [ 96.231844][ T8] 1024-byte region [ffff888022308000, ffff888022308400) [ 96.231844][ T8] The buggy address belongs to the page: [ 96.231844][ T8] page:ffffea000088c200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 96.231844][ T8] flags: 0xfffe0000000200(slab) [ 96.231844][ T8] raw: 00fffe0000000200 ffffea0000a64ac8 ffffea0000a761c8 ffff88802c800c40 [ 96.286623][ T8] raw: 0000000000000000 ffff888022308000 0000000100000002 0000000000000000 [ 96.286623][ T8] page dumped because: kasan: bad access detected [ 96.286623][ T8] [ 96.286623][ T8] Memory state around the buggy address: [ 96.286623][ T8] ffff888022308080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.286623][ T8] ffff888022308100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.286623][ T8] >ffff888022308180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.286623][ T8] ^ [ 96.286623][ T8] ffff888022308200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.286623][ T8] ffff888022308280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 96.286623][ T8] ================================================================== [ 96.286623][ T8] Disabling lock debugging due to kernel taint [ 96.393992][ T8] Kernel panic - not syncing: panic_on_warn set ... [ 96.403895][ T8] CPU: 2 PID: 8 Comm: kworker/u16:0 Tainted: G B 5.8.0-rc2-syzkaller #0 [ 96.403895][ T8] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [ 96.403895][ T8] Workqueue: netns cleanup_net [ 96.403895][ T8] Call Trace: [ 96.403895][ T8] dump_stack+0x18f/0x20d [ 96.403895][ T8] ? afs_wake_up_async_call+0x5e0/0x770 [ 96.403895][ T8] ? afs_put_call+0xa40/0xa40 [ 96.403895][ T8] panic+0x2e3/0x75c [ 96.403895][ T8] ? __warn_printk+0xf3/0xf3 [ 96.403895][ T8] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 96.403895][ T8] ? trace_hardirqs_on+0x55/0x220 [ 96.403895][ T8] ? afs_wake_up_async_call+0x6aa/0x770 [ 96.403895][ T8] ? afs_wake_up_async_call+0x6aa/0x770 [ 96.403895][ T8] ? afs_put_call+0xa40/0xa40 [ 96.403895][ T8] end_report+0x4d/0x53 [ 96.403895][ T8] kasan_report.cold+0xd/0x37 [ 96.403895][ T8] ? rcu_read_lock_held_common+0x71/0xa0 [ 96.403895][ T8] ? afs_wake_up_async_call+0x6aa/0x770 [ 96.403895][ T8] afs_wake_up_async_call+0x6aa/0x770 [ 96.403895][ T8] ? afs_close_socket+0x320/0x320 [ 96.403895][ T8] ? afs_put_call+0xa40/0xa40 [ 96.403895][ T8] rxrpc_notify_socket+0x1db/0x5d0 [ 96.403895][ T8] ? afs_put_call+0xa40/0xa40 [ 96.403895][ T8] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 96.403895][ T8] rxrpc_call_completed+0xca/0xf0 [ 96.403895][ T8] rxrpc_discard_prealloc+0x781/0xab0 [ 96.403895][ T8] ? lock_sock_nested+0x94/0x110 [ 96.403895][ T8] rxrpc_listen+0x147/0x360 [ 96.403895][ T8] afs_close_socket+0x95/0x320 [ 96.403895][ T8] ? afs_purge_servers+0x181/0x330 [ 96.403895][ T8] ? afs_rx_discard_new_call+0x50/0x50 [ 96.403895][ T8] ? init_wait_var_entry+0x200/0x200 [ 96.403895][ T8] afs_net_exit+0x1c4/0x310 [ 96.403895][ T8] ? afs_net_init+0xe90/0xe90 [ 96.403895][ T8] ops_exit_list.isra.0+0xa8/0x150 [ 96.403895][ T8] cleanup_net+0x511/0xa50 [ 96.403895][ T8] ? unregister_pernet_device+0x70/0x70 [ 96.403895][ T8] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 96.403895][ T8] process_one_work+0x965/0x1690 [ 96.403895][ T8] ? lock_release+0x800/0x800 [ 96.403895][ T8] ? pwq_dec_nr_in_flight+0x310/0x310 [ 96.403895][ T8] ? rwlock_bug.part.0+0x90/0x90 [ 96.403895][ T8] worker_thread+0x96/0xe10 [ 96.403895][ T8] ? process_one_work+0x1690/0x1690 [ 96.403895][ T8] kthread+0x3b5/0x4a0 [ 96.403895][ T8] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 96.403895][ T8] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 96.403895][ T8] ret_from_fork+0x1f/0x30 [ 96.403895][ T8] Kernel Offset: disabled [ 96.403895][ T8] Rebooting in 86400 seconds..