[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.653381] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.622359] random: sshd: uninitialized urandom read (32 bytes read) [ 22.903168] random: sshd: uninitialized urandom read (32 bytes read) [ 23.763164] random: sshd: uninitialized urandom read (32 bytes read) [ 23.928464] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.24' (ECDSA) to the list of known hosts. [ 29.371930] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 29.464623] kasan: CONFIG_KASAN_INLINE enabled [ 29.469355] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.476762] general protection fault: 0000 [#1] SMP KASAN [ 29.482305] CPU: 0 PID: 4538 Comm: syz-executor970 Not tainted 4.18.0-rc4+ #139 [ 29.489733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.499083] RIP: 0010:strlen+0x1f/0xa0 [ 29.502945] Code: ff ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 c1 ea 03 48 89 e5 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 24 [ 29.522103] RSP: 0018:ffff8801b388f3d8 EFLAGS: 00010296 [ 29.527453] RAX: dffffc0000000000 RBX: 1ffff10036711e83 RCX: ffffffff8766d02b [ 29.534706] RDX: 0000000000000000 RSI: ffffffff87679de2 RDI: 0000000000000000 [ 29.541967] RBP: ffff8801b388f3f0 R08: ffff8801b43ca540 R09: 0000000000000000 [ 29.549230] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000000 [ 29.556485] R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff10036711eba [ 29.563758] FS: 00000000019cb880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 29.571975] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.577849] CR2: 00000000200003c0 CR3: 00000001b3974000 CR4: 00000000001406f0 [ 29.585111] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.592372] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.599621] Call Trace: [ 29.602227] p9_fd_create_unix+0xbf/0x370 [ 29.606356] ? p9_socket_open+0x220/0x220 [ 29.610488] ? p9_idpool_create+0x42/0x190 [ 29.614716] ? rcu_read_lock_sched_held+0x108/0x120 [ 29.619728] ? kmem_cache_alloc_trace+0x616/0x780 [ 29.624553] ? __lockdep_init_map+0x105/0x590 [ 29.629038] ? lockdep_init_map+0x9/0x10 [ 29.633088] ? __raw_spin_lock_init+0x2d/0x100 [ 29.637657] p9_client_create+0x915/0x16c9 [ 29.641892] ? p9_client_read+0xc60/0xc60 [ 29.646041] ? find_held_lock+0x36/0x1c0 [ 29.650090] ? __lockdep_init_map+0x105/0x590 [ 29.654584] ? kasan_check_write+0x14/0x20 [ 29.658800] ? __init_rwsem+0x1cc/0x2a0 [ 29.662757] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 29.667759] ? rcu_read_lock_sched_held+0x108/0x120 [ 29.672759] ? __kmalloc_track_caller+0x5f5/0x760 [ 29.677583] ? save_stack+0xa9/0xd0 [ 29.681200] ? save_stack+0x43/0xd0 [ 29.684818] ? kasan_kmalloc+0xc4/0xe0 [ 29.688685] ? kmem_cache_alloc_trace+0x152/0x780 [ 29.693512] ? memcpy+0x45/0x50 [ 29.696778] v9fs_session_init+0x21a/0x1a80 [ 29.701080] ? find_held_lock+0x36/0x1c0 [ 29.705126] ? v9fs_show_options+0x7e0/0x7e0 [ 29.709518] ? kasan_check_read+0x11/0x20 [ 29.713649] ? rcu_is_watching+0x8c/0x150 [ 29.717787] ? rcu_pm_notify+0xc0/0xc0 [ 29.721679] ? v9fs_mount+0x61/0x900 [ 29.725380] ? rcu_read_lock_sched_held+0x108/0x120 [ 29.730379] ? kmem_cache_alloc_trace+0x616/0x780 [ 29.735218] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 29.740740] v9fs_mount+0x7c/0x900 [ 29.744268] mount_fs+0xae/0x328 [ 29.747618] vfs_kern_mount.part.34+0xdc/0x4e0 [ 29.752194] ? may_umount+0xb0/0xb0 [ 29.755821] ? _raw_read_unlock+0x22/0x30 [ 29.759949] ? __get_fs_type+0x97/0xc0 [ 29.763830] do_mount+0x581/0x30e0 [ 29.767359] ? copy_mount_string+0x40/0x40 [ 29.771577] ? copy_mount_options+0x5f/0x380 [ 29.775980] ? rcu_read_lock_sched_held+0x108/0x120 [ 29.780980] ? kmem_cache_alloc_trace+0x616/0x780 [ 29.785809] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 29.791348] ? _copy_from_user+0xdf/0x150 [ 29.795480] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 29.801012] ? copy_mount_options+0x285/0x380 [ 29.805496] ksys_mount+0x12d/0x140 [ 29.809107] __x64_sys_mount+0xbe/0x150 [ 29.813151] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.818168] do_syscall_64+0x1b9/0x820 [ 29.822056] ? syscall_slow_exit_work+0x500/0x500 [ 29.826919] ? syscall_return_slowpath+0x5e0/0x5e0 [ 29.831835] ? syscall_return_slowpath+0x31d/0x5e0 [ 29.836759] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 29.842107] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.846932] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.852109] RIP: 0033:0x440159 [ 29.855293] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 29.874415] RSP: 002b:00007ffe9e67dea8 EFLAGS: 00000217 ORIG_RAX: 00000000000000a5 [ 29.882116] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440159 [ 29.889367] RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000 [ 29.896633] RBP: 00000000006ca018 R08: 00000000200006c0 R09: 00000000004002c8 [ 29.904673] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000004019e0 [ 29.911935] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 29.919185] Modules linked in: [ 29.922359] Dumping ftrace buffer: [ 29.925873] (ftrace buffer empty) [ 29.929696] ---[ end trace edea958386ed91c6 ]--- [ 29.934508] RIP: 0010:strlen+0x1f/0xa0 [ 29.938422] Code: ff ff ff 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 55 48 89 fa 48 c1 ea 03 48 89 e5 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 24 [ 29.957781] RSP: 0018:ffff8801b388f3d8 EFLAGS: 00010296 [ 29.963187] RAX: dffffc0000000000 RBX: 1ffff10036711e83 RCX: ffffffff8766d02b [ 29.970482] RDX: 0000000000000000 RSI: ffffffff87679de2 RDI: 0000000000000000 [ 29.977769] RBP: ffff8801b388f3f0 R08: ffff8801b43ca540 R09: 0000000000000000 [ 29.985093] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000000 [ 29.992376] R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff10036711eba [ 29.999661] FS: 00000000019cb880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.007899] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.013812] CR2: 00000000200003c0 CR3: 00000001b3974000 CR4: 00000000001406f0 [ 30.021119] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.028412] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.035711] Kernel panic - not syncing: Fatal exception [ 30.041804] Dumping ftrace buffer: [ 30.045340] (ftrace buffer empty) [ 30.049033] Kernel Offset: disabled [ 30.052641] Rebooting in 86400 seconds..