[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.529232] 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: [ 15.236845] random: sshd: uninitialized urandom read (32 bytes read) [ 15.520879] random: sshd: uninitialized urandom read (32 bytes read) [ 16.427194] random: sshd: uninitialized urandom read (32 bytes read) [ 23.668389] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.7' (ECDSA) to the list of known hosts. [ 29.137112] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 29.218811] kasan: CONFIG_KASAN_INLINE enabled [ 29.223414] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.231831] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 29.238057] Dumping ftrace buffer: [ 29.241570] (ftrace buffer empty) [ 29.245256] Modules linked in: [ 29.248548] CPU: 1 PID: 3799 Comm: syz-executor116 Not tainted 4.9.111-g03c70fe #10 [ 29.256324] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.265671] task: ffff8801b9cd0000 task.stack: ffff8801b7290000 [ 29.271700] RIP: 0010:[] [] strlen+0x1f/0xa0 [ 29.279423] RSP: 0018:ffff8801b7297738 EFLAGS: 00010292 [ 29.284854] RAX: dffffc0000000000 RBX: 1ffff10036e52eed RCX: 0000000000000000 [ 29.292112] RDX: 0000000000000000 RSI: ffffffff839c46c5 RDI: 0000000000000000 [ 29.299358] RBP: ffff8801b7297750 R08: ffffed0039e93f73 R09: 0000000000000000 [ 29.306608] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 29.313868] R13: ffff8801d94f3358 R14: 0000000000000000 R15: ffff8801d94f3300 [ 29.321130] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000827f840 [ 29.329332] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 29.335197] CR2: 00000000200003c0 CR3: 00000001bc691000 CR4: 00000000001606f0 [ 29.342460] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.349725] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.356986] Stack: [ 29.359202] ffff8801cf49fb00 1ffff10036e52eed dffffc0000000000 ffff8801b7297890 [ 29.367206] ffffffff839c46d8 ffff8801b9cd08c0 0000000041b58ab3 ffffffff8442d2d8 [ 29.375228] ffffffff839c4640 024000c000000189 0000000000000000 ffff8801b9cd08c0 [ 29.383243] Call Trace: [ 29.385813] [] p9_fd_create_unix+0x98/0x260 [ 29.391771] [] ? p9_socket_open+0x200/0x200 [ 29.397730] [] ? check_preemption_disabled+0x3b/0x170 [ 29.404554] [] ? __raw_spin_lock_init+0x1c/0x100 [ 29.410957] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 29.417778] [] ? lockdep_init_map+0x105/0x4f0 [ 29.423902] [] ? __raw_spin_lock_init+0x2d/0x100 [ 29.430292] [] p9_client_create+0x6ff/0x10a0 [ 29.436333] [] ? p9_client_zc_rpc.constprop.11+0x1020/0x1020 [ 29.443772] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 29.450592] [] ? bdi_register+0xb4/0x570 [ 29.456280] [] ? bdi_init+0x7ae/0xab0 [ 29.461711] [] v9fs_session_init+0x333/0x13a0 [ 29.467858] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 29.474790] [] ? debug_check_no_obj_freed+0x2ec/0x930 [ 29.481613] [] ? v9fs_inode_init_once+0x30/0x30 [ 29.487917] [] ? debug_object_activate+0x4e0/0x4e0 [ 29.494484] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 29.501319] [] ? free_hot_cold_page+0x493/0x840 [ 29.507622] [] ? check_preemption_disabled+0x3b/0x170 [ 29.514447] [] ? kasan_unpoison_shadow+0x35/0x50 [ 29.520846] [] ? kasan_kmalloc+0xc7/0xe0 [ 29.526544] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 29.533124] [] v9fs_mount+0x7d/0x810 [ 29.538480] [] mount_fs+0x28c/0x370 [ 29.544083] [] vfs_kern_mount.part.29+0xd1/0x3d0 [ 29.550478] [] ? ns_capable_common+0x12a/0x150 [ 29.556945] [] do_mount+0x3c9/0x2740 [ 29.562281] [] ? copy_mount_options+0x5f/0x320 [ 29.568491] [] ? copy_mount_string+0x40/0x40 [ 29.574541] [] ? kasan_unpoison_shadow+0x35/0x50 [ 29.581010] [] ? kasan_kmalloc+0xc7/0xe0 [ 29.586703] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 29.593265] [] ? copy_mount_options+0x5f/0x320 [ 29.599469] [] ? copy_mount_options+0x1e5/0x320 [ 29.605772] [] compat_SyS_mount+0x4fc/0xff0 [ 29.611717] [] ? do_fast_syscall_32+0xcf/0x870 [ 29.617917] [] ? compat_SyS_io_submit+0xf0/0xf0 [ 29.624207] [] do_fast_syscall_32+0x2f7/0x870 [ 29.630629] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.637270] [] entry_SYSENTER_compat+0x90/0xa2 [ 29.643470] 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 [ 29.670851] RIP [] strlen+0x1f/0xa0 [ 29.676339] RSP [ 29.680207] ---[ end trace a70885b8d2fb4e62 ]--- [ 29.684952] Kernel panic - not syncing: Fatal exception [ 29.690825] Dumping ftrace buffer: [ 29.694374] (ftrace buffer empty) [ 29.698089] Kernel Offset: disabled [ 29.701703] Rebooting in 86400 seconds..