[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   14.613987] random: sshd: uninitialized urandom read (32 bytes read)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   19.066117] random: sshd: uninitialized urandom read (32 bytes read)
[   19.364407] random: sshd: uninitialized urandom read (32 bytes read)
[   20.089216] random: sshd: uninitialized urandom read (32 bytes read)
[   23.582474] random: sshd: uninitialized urandom read (32 bytes read)
Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts.
[   29.063852] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   29.150672] 9pnet: Insufficient options for proto=fd
[   29.156543] FAULT_INJECTION: forcing a failure.
[   29.156543] name failslab, interval 1, probability 0, space 0, times 1
[   29.167767] CPU: 1 PID: 4386 Comm: syz-executor227 Not tainted 4.18.0-rc5-next-20180719+ #11
[   29.176345] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.185697] Call Trace:
[   29.188289]  dump_stack+0x1c9/0x2b4
[   29.191903]  ? dump_stack_print_info.cold.2+0x52/0x52
[   29.197100]  ? perf_trace_lock+0x920/0x920
[   29.201336]  should_fail.cold.4+0xa/0x11
[   29.205394]  ? fault_create_debugfs_attr+0x1f0/0x1f0
[   29.210490]  ? perf_trace_lock_acquire+0xeb/0x9a0
[   29.215320]  ? is_bpf_text_address+0xae/0x170
[   29.219821]  ? __debug_object_init+0x581/0x12e0
[   29.224488]  ? lock_downgrade+0x8f0/0x8f0
[   29.228629]  ? lock_downgrade+0x8f0/0x8f0
[   29.232784]  ? kasan_check_read+0x11/0x20
[   29.236933]  ? do_raw_spin_unlock+0xa7/0x2f0
[   29.241334]  ? do_raw_spin_trylock+0x1c0/0x1c0
[   29.245921]  ? do_raw_spin_trylock+0x1c0/0x1c0
[   29.250500]  ? kasan_check_write+0x14/0x20
[   29.254729]  ? check_same_owner+0x340/0x340
[   29.259064]  ? add_wait_queue+0x1b9/0x2b0
[   29.263201]  ? rcu_note_context_switch+0x730/0x730
[   29.268115]  __should_failslab+0x124/0x180
[   29.272339]  should_failslab+0x9/0x14
[   29.276138]  kmem_cache_alloc+0x2af/0x760
[   29.280282]  ? kasan_check_write+0x14/0x20
[   29.284506]  ? do_raw_spin_lock+0xc1/0x200
[   29.288728]  p9_client_prepare_req.part.8+0xbc/0xa00
[   29.293842]  ? trace_9p_protocol_dump+0x3a0/0x3a0
[   29.298698]  ? lock_acquire+0x1e4/0x540
[   29.302655]  ? __fget+0x4ac/0x740
[   29.306097]  ? p9_pollwait+0x83/0x230
[   29.309885]  ? p9_conn_create+0x730/0x730
[   29.314029]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   29.319553]  ? pipe_poll+0x2bd/0x340
[   29.323263]  p9_client_rpc+0x242/0x1330
[   29.327230]  ? p9_conn_create+0x55b/0x730
[   29.331375]  ? p9_client_prepare_req.part.8+0xa00/0xa00
[   29.336735]  ? ksys_dup3+0x690/0x690
[   29.340453]  ? check_same_owner+0x340/0x340
[   29.344768]  ? p9_fd_poll+0x2b0/0x2b0
[   29.348555]  ? kasan_kmalloc+0xc4/0xe0
[   29.352432]  ? p9_fd_show_options+0x1c0/0x1c0
[   29.356926]  p9_client_create+0xca4/0x1537
[   29.361191]  ? p9_client_read+0xbb0/0xbb0
[   29.365336]  ? lock_acquire+0x1e4/0x540
[   29.369315]  ? fs_reclaim_acquire+0x20/0x20
[   29.373639]  ? lock_downgrade+0x8f0/0x8f0
[   29.377791]  ? lock_release+0xa30/0xa30
[   29.381764]  ? __lockdep_init_map+0x105/0x590
[   29.386262]  ? kasan_check_write+0x14/0x20
[   29.390489]  ? __init_rwsem+0x1cc/0x2a0
[   29.394451]  ? do_raw_write_unlock.cold.8+0x49/0x49
[   29.399457]  ? __kmalloc_track_caller+0x311/0x760
[   29.404308]  ? save_stack+0xa9/0xd0
[   29.407934]  ? save_stack+0x43/0xd0
[   29.411554]  ? kasan_kmalloc+0xc4/0xe0
[   29.415430]  ? memcpy+0x45/0x50
[   29.418698]  v9fs_session_init+0x21a/0x1a80
[   29.423004]  ? rcu_note_context_switch+0x730/0x730
[   29.427923]  ? legacy_parse_monolithic+0xde/0x1e0
[   29.432757]  ? v9fs_show_options+0x7e0/0x7e0
[   29.437151]  ? lock_downgrade+0x8f0/0x8f0
[   29.441295]  ? kasan_check_read+0x11/0x20
[   29.445427]  ? do_raw_spin_unlock+0xa7/0x2f0
[   29.449818]  ? do_raw_spin_trylock+0x1c0/0x1c0
[   29.454380]  ? kasan_unpoison_shadow+0x35/0x50
[   29.458953]  ? kasan_kmalloc+0xc4/0xe0
[   29.462835]  ? kmem_cache_alloc_trace+0x318/0x780
[   29.467675]  v9fs_mount+0x7c/0x900
[   29.471201]  ? v9fs_drop_inode+0x150/0x150
[   29.475422]  legacy_get_tree+0x131/0x460
[   29.479471]  vfs_get_tree+0x1cb/0x5c0
[   29.483263]  do_mount+0x6f2/0x1e20
[   29.486785]  ? check_same_owner+0x340/0x340
[   29.491094]  ? lock_release+0xa30/0xa30
[   29.495076]  ? copy_mount_string+0x40/0x40
[   29.499303]  ? kasan_kmalloc+0xc4/0xe0
[   29.503179]  ? kmem_cache_alloc_trace+0x318/0x780
[   29.508023]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   29.513554]  ? _copy_from_user+0xdf/0x150
[   29.517694]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   29.523226]  ? copy_mount_options+0x285/0x380
[   29.527715]  ksys_mount+0x12d/0x140
[   29.531326]  __x64_sys_mount+0xbe/0x150
[   29.535282]  do_syscall_64+0x1b9/0x820
[   29.539159]  ? syscall_slow_exit_work+0x500/0x500
[   29.543993]  ? syscall_return_slowpath+0x5e0/0x5e0
[   29.548905]  ? syscall_return_slowpath+0x31d/0x5e0
[   29.553840]  ? prepare_exit_to_usermode+0x291/0x3b0
[   29.558875]  ? perf_trace_sys_enter+0xb10/0xb10
[   29.563543]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   29.568383]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   29.573567] RIP: 0033:0x440719
[   29.576744] 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   29.595984] RSP: 002b:00007ffc432a9cc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   29.603691] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440719
[   29.610951] RDX: 0000000020000900 RSI: 0000000020000000 RDI: 0000000000000000
[   29.618215] RBP: 0000000000000000 R08: 0000000020000840 R09: 0000000000003831
[   29.625478] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc432a9cd0
[   29.632755] R13: 0030656c69662f2e R14: 64663d736e617274 R15: 0000000000000006
[   29.640100] kasan: CONFIG_KASAN_INLINE enabled
[   29.644739] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   29.652157] general protection fault: 0000 [#1] SMP KASAN
[   29.657706] CPU: 1 PID: 4386 Comm: syz-executor227 Not tainted 4.18.0-rc5-next-20180719+ #11
[   29.666281] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   29.675640] RIP: 0010:p9_client_prepare_req.part.8+0x392/0xa00
[   29.681601] Code: ff 0f 87 6a 02 00 00 e8 bc 39 0c fa 0f be 85 f4 fe ff ff 4c 89 f2 48 c1 ea 03 89 85 f4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 0f 85 89 05 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 
[   29.700761] RSP: 0018:ffff8801bd8c7250 EFLAGS: 00010206
[   29.706119] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000600040
[   29.713373] RDX: 000000000000000a RSI: ffffffff87706d04 RDI: ffff8801b9efa378
[   29.720625] RBP: ffff8801bd8c7380 R08: ffff8801b9f24080 R09: ffffed0037b18de4
[   29.727888] R10: ffffed0037b18de4 R11: 0000000000000003 R12: ffff8801b9efa340
[   29.735140] R13: 0000000000002000 R14: 0000000000000050 R15: ffff8801b9efa37c
[   29.742395] FS:  0000000001ba1880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
[   29.750605] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   29.756477] CR2: 0000000020000200 CR3: 00000001b994e000 CR4: 00000000001406e0
[   29.763732] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   29.770992] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   29.778252] Call Trace:
[   29.780840]  ? trace_9p_protocol_dump+0x3a0/0x3a0
[   29.785679]  ? lock_acquire+0x1e4/0x540
[   29.789656]  ? __fget+0x4ac/0x740
[   29.793101]  ? p9_pollwait+0x83/0x230
[   29.796886]  ? p9_conn_create+0x730/0x730
[   29.801022]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   29.806547]  ? pipe_poll+0x2bd/0x340
[   29.810247]  p9_client_rpc+0x242/0x1330
[   29.814213]  ? p9_conn_create+0x55b/0x730
[   29.818344]  ? p9_client_prepare_req.part.8+0xa00/0xa00
[   29.823699]  ? ksys_dup3+0x690/0x690
[   29.827393]  ? check_same_owner+0x340/0x340
[   29.831708]  ? p9_fd_poll+0x2b0/0x2b0
[   29.835503]  ? kasan_kmalloc+0xc4/0xe0
[   29.839390]  ? p9_fd_show_options+0x1c0/0x1c0
[   29.843897]  p9_client_create+0xca4/0x1537
[   29.848134]  ? p9_client_read+0xbb0/0xbb0
[   29.852266]  ? lock_acquire+0x1e4/0x540
[   29.856226]  ? fs_reclaim_acquire+0x20/0x20
[   29.860539]  ? lock_downgrade+0x8f0/0x8f0
[   29.864681]  ? lock_release+0xa30/0xa30
[   29.868665]  ? __lockdep_init_map+0x105/0x590
[   29.873155]  ? kasan_check_write+0x14/0x20
[   29.877398]  ? __init_rwsem+0x1cc/0x2a0
[   29.881368]  ? do_raw_write_unlock.cold.8+0x49/0x49
[   29.886387]  ? __kmalloc_track_caller+0x311/0x760
[   29.891227]  ? save_stack+0xa9/0xd0
[   29.894925]  ? save_stack+0x43/0xd0
[   29.898556]  ? kasan_kmalloc+0xc4/0xe0
[   29.902438]  ? memcpy+0x45/0x50
[   29.905713]  v9fs_session_init+0x21a/0x1a80
[   29.910049]  ? rcu_note_context_switch+0x730/0x730
[   29.914973]  ? legacy_parse_monolithic+0xde/0x1e0
[   29.919805]  ? v9fs_show_options+0x7e0/0x7e0
[   29.924203]  ? lock_downgrade+0x8f0/0x8f0
[   29.928338]  ? kasan_check_read+0x11/0x20
[   29.932562]  ? do_raw_spin_unlock+0xa7/0x2f0
[   29.936966]  ? do_raw_spin_trylock+0x1c0/0x1c0
[   29.941542]  ? kasan_unpoison_shadow+0x35/0x50
[   29.946130]  ? kasan_kmalloc+0xc4/0xe0
[   29.950017]  ? kmem_cache_alloc_trace+0x318/0x780
[   29.954857]  v9fs_mount+0x7c/0x900
[   29.958404]  ? v9fs_drop_inode+0x150/0x150
[   29.962632]  legacy_get_tree+0x131/0x460
[   29.966685]  vfs_get_tree+0x1cb/0x5c0
[   29.970482]  do_mount+0x6f2/0x1e20
[   29.974015]  ? check_same_owner+0x340/0x340
[   29.978327]  ? lock_release+0xa30/0xa30
[   29.982301]  ? copy_mount_string+0x40/0x40
[   29.986518]  ? kasan_kmalloc+0xc4/0xe0
[   29.990393]  ? kmem_cache_alloc_trace+0x318/0x780
[   29.995229]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   30.000763]  ? _copy_from_user+0xdf/0x150
[   30.004896]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   30.010423]  ? copy_mount_options+0x285/0x380
[   30.015004]  ksys_mount+0x12d/0x140
[   30.018629]  __x64_sys_mount+0xbe/0x150
[   30.022595]  do_syscall_64+0x1b9/0x820
[   30.026463]  ? syscall_slow_exit_work+0x500/0x500
[   30.031303]  ? syscall_return_slowpath+0x5e0/0x5e0
[   30.036223]  ? syscall_return_slowpath+0x31d/0x5e0
[   30.041151]  ? prepare_exit_to_usermode+0x291/0x3b0
[   30.046172]  ? perf_trace_sys_enter+0xb10/0xb10
[   30.050841]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   30.055771]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   30.060963] RIP: 0033:0x440719
[   30.064145] 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 
[   30.083392] RSP: 002b:00007ffc432a9cc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   30.091093] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440719
[   30.098354] RDX: 0000000020000900 RSI: 0000000020000000 RDI: 0000000000000000
[   30.105611] RBP: 0000000000000000 R08: 0000000020000840 R09: 0000000000003831
[   30.112877] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc432a9cd0
[   30.120233] R13: 0030656c69662f2e R14: 64663d736e617274 R15: 0000000000000006
[   30.127490] Modules linked in:
[   30.130681] Dumping ftrace buffer:
[   30.134203]    (ftrace buffer empty)
[   30.138058] ---[ end trace bae3d5802518770f ]---
[   30.142844] RIP: 0010:p9_client_prepare_req.part.8+0x392/0xa00
[   30.148840] Code: ff 0f 87 6a 02 00 00 e8 bc 39 0c fa 0f be 85 f4 fe ff ff 4c 89 f2 48 c1 ea 03 89 85 f4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 0f 85 89 05 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 
[   30.168185] RSP: 0018:ffff8801bd8c7250 EFLAGS: 00010206
[   30.173567] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000600040
[   30.180881] RDX: 000000000000000a RSI: ffffffff87706d04 RDI: ffff8801b9efa378
[   30.188191] RBP: ffff8801bd8c7380 R08: ffff8801b9f24080 R09: ffffed0037b18de4
[   30.195489] R10: ffffed0037b18de4 R11: 0000000000000003 R12: ffff8801b9efa340
[   30.202777] R13: 0000000000002000 R14: 0000000000000050 R15: ffff8801b9efa37c
[   30.210077] FS:  0000000001ba1880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
[   30.218318] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   30.224207] CR2: 0000000020000200 CR3: 00000001b994e000 CR4: 00000000001406e0
[   30.231503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   30.238804] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   30.246109] Kernel panic - not syncing: Fatal exception
[   30.252048] Dumping ftrace buffer:
[   30.255593]    (ftrace buffer empty)
[   30.259309] Kernel Offset: disabled
[   30.262957] Rebooting in 86400 seconds..