[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.306612] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.116279] random: sshd: uninitialized urandom read (32 bytes read) [ 21.351792] random: sshd: uninitialized urandom read (32 bytes read) [ 22.118433] random: sshd: uninitialized urandom read (32 bytes read) [ 22.273939] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. [ 27.677968] random: sshd: uninitialized urandom read (32 bytes read) [ 27.812685] IPVS: ftp: loaded support on port[0] = 21 [ 27.814326] IPVS: ftp: loaded support on port[0] = 21 [ 27.820547] IPVS: ftp: loaded support on port[0] = 21 [ 27.825760] IPVS: ftp: loaded support on port[0] = 21 [ 27.830681] IPVS: ftp: loaded support on port[0] = 21 [ 27.834910] IPVS: ftp: loaded support on port[0] = 21 [ 27.840551] IPVS: ftp: loaded support on port[0] = 21 [ 27.845632] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program [ 28.063993] FAULT_INJECTION: forcing a failure. [ 28.063993] name failslab, interval 1, probability 0, space 0, times 1 [ 28.075549] CPU: 0 PID: 4538 Comm: syz-executor884 Not tainted 4.17.0-rc4+ #43 [ 28.082915] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.092250] Call Trace: [ 28.094822] dump_stack+0x1b9/0x294 [ 28.098437] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.103609] ? rcu_note_context_switch+0x710/0x710 [ 28.108543] should_fail.cold.4+0xa/0x1a [ 28.112588] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 28.117675] ? kernfs_mount_ns+0x497/0x8e0 [ 28.121890] ? find_held_lock+0x36/0x1c0 [ 28.125931] ? graph_lock+0x170/0x170 [ 28.129718] ? mutex_trylock+0x2a0/0x2a0 [ 28.133769] ? find_held_lock+0x36/0x1c0 [ 28.137814] ? __lock_is_held+0xb5/0x140 [ 28.141860] ? check_same_owner+0x320/0x320 [ 28.146168] ? rcu_note_context_switch+0x710/0x710 [ 28.151082] ? lock_downgrade+0x8e0/0x8e0 [ 28.155211] __should_failslab+0x124/0x180 [ 28.159431] should_failslab+0x9/0x14 [ 28.163216] kmem_cache_alloc+0x2af/0x760 [ 28.167346] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 28.171912] ? kasan_check_write+0x14/0x20 [ 28.176130] alloc_inode+0xb2/0x190 [ 28.179738] iget_locked+0x1f0/0x560 [ 28.183436] ? iget5_locked+0x570/0x570 [ 28.187404] ? rcu_read_lock_sched_held+0x108/0x120 [ 28.192405] ? kmem_cache_alloc_trace+0x616/0x780 [ 28.197228] ? lock_downgrade+0x8e0/0x8e0 [ 28.201359] kernfs_get_inode+0x51/0x570 [ 28.205403] kernfs_mount_ns+0x4de/0x8e0 [ 28.209449] ? kernfs_super_ns+0x70/0x70 [ 28.213498] sysfs_mount+0xdf/0x200 [ 28.217108] ? sysfs_kill_sb+0x40/0x40 [ 28.220979] ? lock_downgrade+0x8e0/0x8e0 [ 28.225109] ? module_unload_free+0x5b0/0x5b0 [ 28.229590] mount_fs+0xae/0x328 [ 28.232937] ? mpi_free.cold.1+0x19/0x19 [ 28.236981] vfs_kern_mount.part.34+0xd4/0x4d0 [ 28.241570] ? may_umount+0xb0/0xb0 [ 28.245178] ? _raw_read_unlock+0x22/0x30 [ 28.249312] ? __get_fs_type+0x97/0xc0 [ 28.253204] do_mount+0x564/0x3070 [ 28.256728] ? lock_downgrade+0x8e0/0x8e0 [ 28.260861] ? copy_mount_string+0x40/0x40 [ 28.265079] ? check_same_owner+0x320/0x320 [ 28.269385] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 28.274383] ? __check_object_size+0x95/0x5d9 [ 28.278863] ? __might_sleep+0x95/0x190 [ 28.282837] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.288362] ? _copy_from_user+0xdf/0x150 [ 28.292493] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.298020] ? copy_mount_options+0x285/0x380 [ 28.302508] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.308037] ksys_mount+0x12d/0x140 [ 28.311653] __x64_sys_mount+0xbe/0x150 [ 28.315610] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.320609] do_syscall_64+0x1b1/0x800 [ 28.324480] ? syscall_return_slowpath+0x5c0/0x5c0 [ 28.329402] ? syscall_return_slowpath+0x30f/0x5c0 [ 28.334319] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 28.339666] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.344492] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.349659] RIP: 0033:0x4426a9 [ 28.352828] RSP: 002b:00007ffc558bd1b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 executing program [ 28.360517] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004426a9 [ 28.367769] RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000020000040 [ 28.375027] RBP: 00007ffc558bda60 R08: 0000000000000000 R09: 0000000300000000 [ 28.382293] R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff [ 28.389544] R13: 0000000000000004 R14: 0000000000001380 R15: 00007ffc558bd2f8 [ 28.410380] FAULT_INJECTION: forcing a failure. [ 28.410380] name failslab, interval 1, probability 0, space 0, times 0 [ 28.421653] CPU: 1 PID: 4540 Comm: syz-executor884 Not tainted 4.17.0-rc4+ #43 [ 28.429017] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.438365] Call Trace: [ 28.440941] dump_stack+0x1b9/0x294 [ 28.444567] ? dump_stack_print_info.cold.2+0x52/0x52 [ 28.449756] ? rcu_note_context_switch+0x710/0x710 [ 28.454674] should_fail.cold.4+0xa/0x1a [ 28.458719] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 28.463815] ? kernfs_mount_ns+0x497/0x8e0 [ 28.468040] ? find_held_lock+0x36/0x1c0 [ 28.472083] ? graph_lock+0x170/0x170 [ 28.475867] ? mutex_trylock+0x2a0/0x2a0 [ 28.479914] ? find_held_lock+0x36/0x1c0 [ 28.483969] ? __lock_is_held+0xb5/0x140 [ 28.488028] ? check_same_owner+0x320/0x320 [ 28.492331] ? rcu_note_context_switch+0x710/0x710 [ 28.497245] ? lock_downgrade+0x8e0/0x8e0 [ 28.501381] __should_failslab+0x124/0x180 [ 28.505601] should_failslab+0x9/0x14 [ 28.509384] kmem_cache_alloc+0x2af/0x760 [ 28.513515] ? do_raw_spin_trylock+0x1b0/0x1b0 [ 28.518087] ? kasan_check_write+0x14/0x20 [ 28.522310] alloc_inode+0xb2/0x190 [ 28.525919] iget_locked+0x1f0/0x560 [ 28.529624] ? iget5_locked+0x570/0x570 [ 28.533584] ? rcu_read_lock_sched_held+0x108/0x120 [ 28.538583] ? kmem_cache_alloc_trace+0x616/0x780 [ 28.543413] ? lock_downgrade+0x8e0/0x8e0 [ 28.547547] kernfs_get_inode+0x51/0x570 [ 28.551593] kernfs_mount_ns+0x4de/0x8e0 [ 28.555641] ? kernfs_super_ns+0x70/0x70 [ 28.559690] sysfs_mount+0xdf/0x200 [ 28.563308] ? sysfs_kill_sb+0x40/0x40 [ 28.567188] ? lock_downgrade+0x8e0/0x8e0 [ 28.571317] ? module_unload_free+0x5b0/0x5b0 [ 28.575795] mount_fs+0xae/0x328 [ 28.579142] ? mpi_free.cold.1+0x19/0x19 [ 28.583187] vfs_kern_mount.part.34+0xd4/0x4d0 [ 28.587760] ? may_umount+0xb0/0xb0 [ 28.591378] ? _raw_read_unlock+0x22/0x30 [ 28.595508] ? __get_fs_type+0x97/0xc0 [ 28.599392] do_mount+0x564/0x3070 [ 28.602916] ? lock_downgrade+0x8e0/0x8e0 [ 28.607047] ? copy_mount_string+0x40/0x40 [ 28.611275] ? check_same_owner+0x320/0x320 [ 28.615590] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 28.620587] ? __check_object_size+0x95/0x5d9 [ 28.625067] ? __might_sleep+0x95/0x190 [ 28.629031] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.634556] ? _copy_from_user+0xdf/0x150 [ 28.638692] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.644223] ? copy_mount_options+0x285/0x380 [ 28.648704] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.654231] ksys_mount+0x12d/0x140 [ 28.657844] __x64_sys_mount+0xbe/0x150 [ 28.661800] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 28.666799] do_syscall_64+0x1b1/0x800 [ 28.670672] ? syscall_return_slowpath+0x5c0/0x5c0 [ 28.675586] ? syscall_return_slowpath+0x30f/0x5c0 [ 28.680503] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 28.685862] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.690699] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 28.695871] RIP: 0033:0x4426a9 [ 28.699050] RSP: 002b:00007ffc558bd1b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 28.706757] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004426a9 [ 28.714639] RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000020000040 [ 28.721904] RBP: 00007ffc558bda60 R08: 0000000000000000 R09: 0000000300000000 [ 28.729157] R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff [ 28.736410] R13: 0000000000000004 R14: 0000000000001380 R15: 00007ffc558bd2f8 [ 28.743956] kasan: CONFIG_KASAN_INLINE enabled [ 28.748810] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.756300] general protection fault: 0000 [#1] SMP KASAN [ 28.761825] Dumping ftrace buffer: [ 28.765345] (ftrace buffer empty) [ 28.769034] Modules linked in: [ 28.772221] CPU: 1 PID: 4540 Comm: syz-executor884 Not tainted 4.17.0-rc4+ #43 [ 28.779560] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.788907] RIP: 0010:__list_del_entry_valid+0x84/0xf3 [ 28.794161] RSP: 0018:ffff8801aca6f860 EFLAGS: 00010246 [ 28.799506] RAX: dffffc0000000000 RBX: ffff8801ac528498 RCX: 0000000000000000 [ 28.806759] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801ac5284a0 [ 28.814013] RBP: ffff8801aca6f878 R08: fffffbfff11cc855 R09: fffffbfff11cc854 [ 28.821268] R10: ffff8801aca6f878 R11: ffffffff88e642a7 R12: 0000000000000000 [ 28.828520] R13: 0000000000000000 R14: ffff8801aca6f908 R15: ffff8801ac528498 [ 28.835790] FS: 0000000000f86880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 28.843997] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.849864] CR2: 00000000004b6f3c CR3: 00000001d9730000 CR4: 00000000001406e0 [ 28.857121] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.864374] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.871622] Call Trace: [ 28.874196] kernfs_kill_sb+0xa0/0x350 [ 28.878073] ? unregister_shrinker+0x23a/0x3a0 [ 28.882636] ? kernfs_mount_ns+0x8e0/0x8e0 [ 28.886853] ? perf_trace_mm_vmscan_writepage+0x750/0x750 [ 28.892376] ? rcu_read_lock_sched_held+0x108/0x120 [ 28.897389] ? kmem_cache_alloc_trace+0x616/0x780 [ 28.902218] sysfs_kill_sb+0x22/0x40 [ 28.905925] deactivate_locked_super+0x97/0x100 [ 28.910582] kernfs_mount_ns+0x753/0x8e0 [ 28.914627] ? kernfs_super_ns+0x70/0x70 [ 28.918671] sysfs_mount+0xdf/0x200 [ 28.922277] ? sysfs_kill_sb+0x40/0x40 [ 28.926144] ? lock_downgrade+0x8e0/0x8e0 [ 28.930272] ? module_unload_free+0x5b0/0x5b0 [ 28.934747] mount_fs+0xae/0x328 [ 28.938094] ? mpi_free.cold.1+0x19/0x19 [ 28.942138] vfs_kern_mount.part.34+0xd4/0x4d0 [ 28.946697] ? may_umount+0xb0/0xb0 [ 28.950302] ? _raw_read_unlock+0x22/0x30 [ 28.954427] ? __get_fs_type+0x97/0xc0 [ 28.958307] do_mount+0x564/0x3070 [ 28.961837] ? lock_downgrade+0x8e0/0x8e0 [ 28.965971] ? copy_mount_string+0x40/0x40 [ 28.970193] ? check_same_owner+0x320/0x320 [ 28.974500] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 28.979498] ? __check_object_size+0x95/0x5d9 [ 28.983988] ? __might_sleep+0x95/0x190 [ 28.987957] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 28.993474] ? _copy_from_user+0xdf/0x150 [ 28.997603] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 29.003133] ? copy_mount_options+0x285/0x380 [ 29.007609] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 29.013125] ksys_mount+0x12d/0x140 [ 29.016733] __x64_sys_mount+0xbe/0x150 [ 29.020687] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 29.025685] do_syscall_64+0x1b1/0x800 [ 29.029553] ? syscall_return_slowpath+0x5c0/0x5c0 [ 29.034462] ? syscall_return_slowpath+0x30f/0x5c0 [ 29.039374] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 29.044725] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.049568] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 29.054738] RIP: 0033:0x4426a9 [ 29.057905] RSP: 002b:00007ffc558bd1b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 29.065594] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004426a9 [ 29.072843] RDX: 00000000200000c0 RSI: 0000000020000080 RDI: 0000000020000040 [ 29.080101] RBP: 00007ffc558bda60 R08: 0000000000000000 R09: 0000000300000000 [ 29.087362] R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff [ 29.094613] R13: 0000000000000004 R14: 0000000000001380 R15: 00007ffc558bd2f8 [ 29.101862] Code: c5 0f 84 cc 00 00 00 48 b8 00 02 00 00 00 00 ad de 49 39 c4 0f 84 a5 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 5f 49 8b 14 24 48 39 da 0f 85 ba 00 00 00 48 b8 [ 29.121020] RIP: __list_del_entry_valid+0x84/0xf3 RSP: ffff8801aca6f860 [ 29.127856] ---[ end trace d148f307a34e229f ]--- [ 29.132614] Kernel panic - not syncing: Fatal exception [ 29.138327] Dumping ftrace buffer: [ 29.141854] (ftrace buffer empty) [ 29.145546] Kernel Offset: disabled [ 29.149153] Rebooting in 86400 seconds..