[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 13.306729] 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: [ 18.833548] random: sshd: uninitialized urandom read (32 bytes read) [ 19.204193] random: sshd: uninitialized urandom read (32 bytes read) [ 20.077552] random: sshd: uninitialized urandom read (32 bytes read) [ 30.212285] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. [ 35.602069] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 35.680205] kasan: CONFIG_KASAN_INLINE enabled [ 35.684808] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.692159] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 35.698362] Dumping ftrace buffer: [ 35.701871] (ftrace buffer empty) [ 35.705551] Modules linked in: [ 35.708830] CPU: 0 PID: 3806 Comm: syz-executor479 Not tainted 4.9.111-g03c70fe #6 [ 35.716503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.725828] task: ffff8801b740e000 task.stack: ffff8801d8fd0000 [ 35.731854] RIP: 0010:[] [] strlen+0x1f/0xa0 [ 35.739569] RSP: 0018:ffff8801d8fd7768 EFLAGS: 00010292 [ 35.744984] RAX: dffffc0000000000 RBX: 1ffff1003b1faef3 RCX: 0000000000000000 [ 35.752226] RDX: 0000000000000000 RSI: ffffffff839c46c5 RDI: 0000000000000000 [ 35.759469] RBP: ffff8801d8fd7780 R08: ffffed0039ad84f3 R09: 0000000000000000 [ 35.766708] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 35.773949] R13: ffff8801b5fd1158 R14: 0000000000000000 R15: ffff8801b5fd1100 [ 35.781190] FS: 00000000013d2880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 35.789384] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.795236] CR2: 00000000200003c0 CR3: 00000001bb9a8000 CR4: 00000000001606f0 [ 35.802479] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.809719] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.816955] Stack: [ 35.819074] 0000000000000296 1ffff1003b1faef3 dffffc0000000000 ffff8801d8fd78c0 [ 35.827044] ffffffff839c46d8 ffff8801b740e8c0 0000000041b58ab3 ffffffff8442d2d8 [ 35.835018] ffffffff839c4640 0000000000000189 0000000000000000 ffff8801d8fd77e8 [ 35.842999] Call Trace: [ 35.845561] [] p9_fd_create_unix+0x98/0x260 [ 35.851509] [] ? p9_socket_open+0x200/0x200 [ 35.857452] [] ? check_preemption_disabled+0x3b/0x170 [ 35.864260] [] ? __raw_spin_lock_init+0x1c/0x100 [ 35.870637] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 35.877446] [] ? lockdep_init_map+0x105/0x4f0 [ 35.883562] [] ? __raw_spin_lock_init+0x2d/0x100 [ 35.889941] [] p9_client_create+0x6ff/0x10a0 [ 35.895971] [] ? p9_client_zc_rpc.constprop.11+0x1020/0x1020 [ 35.903391] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 35.910206] [] ? bdi_register+0xb4/0x570 [ 35.915889] [] ? bdi_init+0x7ae/0xab0 [ 35.921314] [] v9fs_session_init+0x333/0x13a0 [ 35.927441] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 35.934337] [] ? debug_check_no_obj_freed+0x2ec/0x930 [ 35.941147] [] ? v9fs_inode_init_once+0x30/0x30 [ 35.947436] [] ? debug_object_activate+0x4e0/0x4e0 [ 35.953984] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 35.960796] [] ? free_hot_cold_page+0x493/0x840 [ 35.967085] [] ? check_preemption_disabled+0x3b/0x170 [ 35.973896] [] ? kasan_unpoison_shadow+0x35/0x50 [ 35.980272] [] ? kasan_kmalloc+0xc7/0xe0 [ 35.985964] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 35.992515] [] ? v9fs_mount+0x62/0x810 [ 35.998026] [] v9fs_mount+0x7d/0x810 [ 36.003378] [] mount_fs+0x28c/0x370 [ 36.008630] [] vfs_kern_mount.part.29+0xd1/0x3d0 [ 36.015009] [] ? ns_capable_common+0x12a/0x150 [ 36.021215] [] do_mount+0x3c9/0x2740 [ 36.026551] [] ? copy_mount_string+0x40/0x40 [ 36.032579] [] ? kasan_unpoison_shadow+0x35/0x50 [ 36.038953] [] ? kasan_kmalloc+0xc7/0xe0 [ 36.044633] [] ? kmem_cache_alloc_trace+0xfd/0x2b0 [ 36.051181] [] ? copy_mount_options+0x5f/0x320 [ 36.057393] [] ? copy_mount_options+0x1e5/0x320 [ 36.063681] [] SyS_mount+0xfe/0x110 [ 36.068927] [] ? copy_mnt_ns+0x8e0/0x8e0 [ 36.074607] [] do_syscall_64+0x1a6/0x490 [ 36.080287] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 36.087180] 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 [ 36.113855] RIP [] strlen+0x1f/0xa0 [ 36.119220] RSP [ 36.123016] ---[ end trace 79b75f9b067e001c ]--- [ 36.127746] Kernel panic - not syncing: Fatal exception [ 36.133479] Dumping ftrace buffer: [ 36.136995] (ftrace buffer empty) [ 36.140679] Kernel Offset: disabled [ 36.144277] Rebooting in 86400 seconds..