[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 12.500074] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.898721] random: sshd: uninitialized urandom read (32 bytes read) [ 24.396668] random: sshd: uninitialized urandom read (32 bytes read) [ 25.075239] random: sshd: uninitialized urandom read (32 bytes read) [ 25.200394] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.40' (ECDSA) to the list of known hosts. [ 30.700105] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.779048] kasan: CONFIG_KASAN_INLINE enabled [ 30.783692] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.791106] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.797346] Dumping ftrace buffer: [ 30.800867] (ftrace buffer empty) [ 30.804551] Modules linked in: [ 30.807839] CPU: 1 PID: 3786 Comm: syz-executor249 Not tainted 4.9.111-g03c70fe #58 [ 30.815603] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.824952] task: ffff8801b99f1800 task.stack: ffff8801d94d0000 [ 30.830989] RIP: 0010:[] [] strlen+0x1f/0xa0 [ 30.838712] RSP: 0018:ffff8801d94d7768 EFLAGS: 00010292 [ 30.844133] RAX: dffffc0000000000 RBX: 1ffff1003b29aef3 RCX: 0000000000000000 [ 30.851384] RDX: 0000000000000000 RSI: ffffffff839c46c5 RDI: 0000000000000000 [ 30.858637] RBP: ffff8801d94d7780 R08: ffffed0039b39313 R09: 0000000000000000 [ 30.865881] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.873126] R13: ffff8801b7de1158 R14: 0000000000000000 R15: ffff8801b7de1100 [ 30.880370] FS: 0000000001d51880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 30.888575] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.894427] CR2: 00000000200003c0 CR3: 00000001bfabe000 CR4: 00000000001606f0 [ 30.901672] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.908913] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.916165] Stack: [ 30.918286] 0000000000000296 1ffff1003b29aef3 dffffc0000000000 ffff8801d94d78c0 [ 30.926297] ffffffff839c46d8 ffff8801b99f20c0 0000000041b58ab3 ffffffff8442d2d8 [ 30.934274] ffffffff839c4640 0000000000000189 0000000000000000 ffff8801d94d77e8 [ 30.942259] Call Trace: [ 30.944830] [] p9_fd_create_unix+0x98/0x260 [ 30.950775] [] ? p9_socket_open+0x200/0x200 [ 30.956722] [] ? check_preemption_disabled+0x3b/0x170 [ 30.963535] [] ? __raw_spin_lock_init+0x1c/0x100 [ 30.969922] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.976745] [] ? lockdep_init_map+0x105/0x4f0 [ 30.982870] [] ? __raw_spin_lock_init+0x2d/0x100 [ 30.989249] [] p9_client_create+0x6ff/0x10a0 [ 30.995278] [] ? p9_client_zc_rpc.constprop.11+0x1020/0x1020 [ 31.002697] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 31.009507] [] ? bdi_register+0xb4/0x570 [ 31.015186] [] ? bdi_init+0x7ae/0xab0 [ 31.020610] [] v9fs_session_init+0x333/0x13a0 [ 31.026736] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 31.033632] [] ? debug_check_no_obj_freed+0x2ec/0x930 [ 31.040446] [] ? v9fs_inode_init_once+0x30/0x30 [ 31.046736] [] ? debug_object_activate+0x4e0/0x4e0 [ 31.053286] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 31.060098] [] ? free_hot_cold_page+0x493/0x840 [ 31.066391] [] ? check_preemption_disabled+0x3b/0x170 [ 31.073307] [] ? kasan_unpoison_shadow+0x35/0x50 [ 31.079698] [] ? kasan_kmalloc+0xc7/0xe0 [ 31.085383] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 31.091940] [] ? v9fs_mount+0x62/0x810 [ 31.097451] [] v9fs_mount+0x7d/0x810 [ 31.102786] [] mount_fs+0x28c/0x370 [ 31.108034] [] vfs_kern_mount.part.29+0xd1/0x3d0 [ 31.114410] [] ? ns_capable_common+0x12a/0x150 [ 31.120613] [] do_mount+0x3c9/0x2740 [ 31.125958] [] ? copy_mount_string+0x40/0x40 [ 31.131985] [] ? kasan_unpoison_shadow+0x35/0x50 [ 31.138363] [] ? kasan_kmalloc+0xc7/0xe0 [ 31.144044] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 31.150594] [] ? copy_mount_options+0x5f/0x320 [ 31.156796] [] ? copy_mount_options+0x1e5/0x320 [ 31.163088] [] SyS_mount+0xfe/0x110 [ 31.168337] [] ? copy_mnt_ns+0x8e0/0x8e0 [ 31.174020] [] do_syscall_64+0x1a6/0x490 [ 31.179706] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 31.186605] Code: 87 90 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 89 e5 48 c1 ea 03 41 54 49 89 fc 53 48 83 ec 08 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 4d 41 80 3c [ 31.213417] RIP [] strlen+0x1f/0xa0 [ 31.218790] RSP [ 31.222615] ---[ end trace 3807795de3d1ecb3 ]--- [ 31.227348] Kernel panic - not syncing: Fatal exception [ 31.233202] Dumping ftrace buffer: [ 31.236715] (ftrace buffer empty) [ 31.240403] Kernel Offset: disabled [ 31.244004] Rebooting in 86400 seconds..