[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.941845] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.456224] random: sshd: uninitialized urandom read (32 bytes read) [ 21.739674] random: sshd: uninitialized urandom read (32 bytes read) [ 22.444715] random: sshd: uninitialized urandom read (32 bytes read) [ 22.956178] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.56' (ECDSA) to the list of known hosts. [ 28.376740] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 35.383080] ------------[ cut here ]------------ [ 35.387933] ODEBUG: free active (active state 0) object type: work_struct hint: p9_read_work+0x0/0x1060 [ 35.397822] WARNING: CPU: 1 PID: 4462 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 [ 35.406582] Kernel panic - not syncing: panic_on_warn set ... [ 35.406582] [ 35.413968] CPU: 1 PID: 4462 Comm: syz-executor156 Not tainted 4.18.0-rc4-next-20180710+ #3 [ 35.422468] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.431908] Call Trace: [ 35.434513] dump_stack+0x1c9/0x2b4 [ 35.438158] ? dump_stack_print_info.cold.2+0x52/0x52 [ 35.443377] panic+0x238/0x4e7 [ 35.446597] ? add_taint.cold.5+0x16/0x16 [ 35.450782] ? __warn.cold.8+0x148/0x1ba [ 35.454867] ? __warn.cold.8+0x117/0x1ba [ 35.458950] ? debug_print_object+0x16a/0x210 [ 35.463486] __warn.cold.8+0x163/0x1ba [ 35.467527] ? debug_print_object+0x16a/0x210 [ 35.472050] report_bug+0x252/0x2d0 [ 35.475696] do_error_trap+0x1fc/0x4d0 [ 35.479604] ? math_error+0x3e0/0x3e0 [ 35.483438] ? fork_usermode_blob+0x1b0/0x1b0 [ 35.487954] ? vprintk_default+0x28/0x30 [ 35.492043] ? vprintk_func+0x81/0x117 [ 35.495951] ? printk+0xa7/0xcf [ 35.499264] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.504153] do_invalid_op+0x1b/0x20 [ 35.507886] invalid_op+0x14/0x20 [ 35.511355] RIP: 0010:debug_print_object+0x16a/0x210 [ 35.516483] Code: 1a 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 92 00 00 00 48 8b 14 dd 20 92 1a 88 4c 89 f6 48 c7 c7 c0 87 1a 88 e8 56 2e e3 fd <0f> 0b 83 05 19 6c 3b 06 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f [ 35.535774] RSP: 0018:ffff8801b84ef388 EFLAGS: 00010082 [ 35.541149] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 35.548440] RDX: 0000000000000000 RSI: ffffffff81634451 RDI: 0000000000000001 [ 35.555735] RBP: ffff8801b84ef3c8 R08: ffff8801abe983c0 R09: ffffed003b5e3ec2 [ 35.563073] R10: ffffed003b5e3ec2 R11: ffff8801daf1f617 R12: 0000000000000001 [ 35.570421] R13: ffffffff88f63c00 R14: ffffffff881a8c60 R15: ffffffff814ec5a0 [ 35.577902] ? fork_usermode_blob+0x1b0/0x1b0 [ 35.582425] ? vprintk_func+0x81/0x117 [ 35.586342] ? debug_print_object+0x16a/0x210 [ 35.590860] debug_check_no_obj_freed+0x3b2/0x595 [ 35.595726] ? lock_downgrade+0x8f0/0x8f0 [ 35.599901] ? free_obj_work+0xbb0/0xbb0 [ 35.604073] ? kasan_check_write+0x14/0x20 [ 35.608345] kfree+0xc7/0x260 [ 35.611473] p9_fd_close+0x416/0x5b0 [ 35.615221] ? p9_poll_workfn+0x6d0/0x6d0 [ 35.619457] ? p9_fd_show_options+0x1c0/0x1c0 [ 35.624056] ? __raw_spin_lock_init+0x2d/0x100 [ 35.628657] p9_client_create+0xac2/0x16c9 [ 35.633091] ? p9_client_read+0xc60/0xc60 [ 35.637270] ? kasan_check_read+0x11/0x20 [ 35.641446] ? lock_acquire+0x1e4/0x540 [ 35.645498] ? fs_reclaim_acquire+0x20/0x20 [ 35.649920] ? lock_release+0xa30/0xa30 [ 35.653930] ? __lockdep_init_map+0x105/0x590 [ 35.658452] ? kasan_check_write+0x14/0x20 [ 35.662712] ? __init_rwsem+0x1cc/0x2a0 [ 35.666711] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 35.671756] ? __kmalloc_track_caller+0x311/0x760 [ 35.676649] ? save_stack+0xa9/0xd0 [ 35.680312] ? save_stack+0x43/0xd0 [ 35.683954] ? kasan_kmalloc+0xc4/0xe0 [ 35.687857] ? kmem_cache_alloc_trace+0x152/0x780 [ 35.692720] ? memcpy+0x45/0x50 [ 35.696108] v9fs_session_init+0x21a/0x1a80 [ 35.700456] ? rcu_note_context_switch+0x730/0x730 [ 35.705411] ? do_mount+0x69e/0x1fb0 [ 35.709152] ? lock_acquire+0x1e4/0x540 [ 35.713142] ? v9fs_show_options+0x7e0/0x7e0 [ 35.717570] ? lock_release+0xa30/0xa30 [ 35.721562] ? check_same_owner+0x340/0x340 [ 35.725900] ? kasan_unpoison_shadow+0x35/0x50 [ 35.730495] ? kasan_kmalloc+0xc4/0xe0 [ 35.734405] ? kmem_cache_alloc_trace+0x318/0x780 [ 35.739263] ? kasan_unpoison_shadow+0x35/0x50 [ 35.743866] ? kasan_kmalloc+0xc4/0xe0 [ 35.747781] v9fs_mount+0x7c/0x900 [ 35.751347] ? v9fs_drop_inode+0x150/0x150 [ 35.755597] legacy_get_tree+0x118/0x440 [ 35.759679] vfs_get_tree+0x1cb/0x5c0 [ 35.763499] do_mount+0x6c1/0x1fb0 [ 35.767068] ? kasan_check_write+0x14/0x20 [ 35.771331] ? copy_mount_string+0x40/0x40 [ 35.775586] ? kasan_kmalloc+0xc4/0xe0 [ 35.779496] ? kmem_cache_alloc_trace+0x318/0x780 [ 35.784356] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 35.790004] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 35.795571] ? copy_mount_options+0x285/0x380 [ 35.800100] ksys_mount+0x12d/0x140 [ 35.803748] __x64_sys_mount+0xbe/0x150 [ 35.807746] do_syscall_64+0x1b9/0x820 [ 35.811673] ? finish_task_switch+0x1d3/0x870 [ 35.816280] ? syscall_return_slowpath+0x5e0/0x5e0 [ 35.821313] ? syscall_return_slowpath+0x31d/0x5e0 [ 35.826263] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 35.831302] ? prepare_exit_to_usermode+0x291/0x3b0 [ 35.836338] ? perf_trace_sys_enter+0xb10/0xb10 [ 35.841028] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.845921] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.851141] RIP: 0033:0x445669 [ 35.854347] Code: e8 ec b9 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 8b 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 35.873637] RSP: 002b:00007f51ca812d18 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 [ 35.881399] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445669 [ 35.888688] RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000000000000 [ 35.895981] RBP: 00000000006dac20 R08: 0000000020000480 R09: 65732f636f72702f [ 35.903271] R10: 0000000000000000 R11: 0000000000000206 R12: 00007f51ca812d20 [ 35.910566] R13: 0030656c69662f2e R14: 666e69746e756f6d R15: 0000000000000001 [ 37.022885] Shutting down cpus with NMI [ 37.027281] Dumping ftrace buffer: [ 37.030800] (ftrace buffer empty) [ 37.034486] Kernel Offset: disabled [ 37.038101] Rebooting in 86400 seconds..