[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.143584] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.876643] random: sshd: uninitialized urandom read (32 bytes read) [ 22.452993] random: sshd: uninitialized urandom read (32 bytes read) [ 23.162689] random: sshd: uninitialized urandom read (32 bytes read) [ 23.296480] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.17' (ECDSA) to the list of known hosts. [ 28.781799] 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 [ 30.338824] list_del corruption, ffff8801aaad22a8->next is LIST_POISON1 (dead000000000100) [ 30.347388] ------------[ cut here ]------------ [ 30.352125] kernel BUG at lib/list_debug.c:47! [ 30.356716] invalid opcode: 0000 [#1] SMP KASAN [ 30.361381] CPU: 1 PID: 4547 Comm: syz-executor199 Not tainted 4.18.0-rc5-next-20180716+ #8 [ 30.369846] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.379190] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 [ 30.385054] Code: ff fd 0f 0b 4c 89 e2 48 89 de 48 c7 c7 40 88 1a 88 e8 0a 35 ff fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 e0 87 1a 88 e8 f6 34 ff fd <0f> 0b 48 89 de 48 c7 c7 00 89 1a 88 e8 e5 34 ff fd 0f 0b 48 89 de [ 30.404172] RSP: 0018:ffff8801ab69f270 EFLAGS: 00010286 [ 30.409519] RAX: 000000000000004e RBX: ffff8801aaad22a8 RCX: 0000000000000000 [ 30.416766] RDX: 0000000000000000 RSI: ffffffff81633fc1 RDI: 0000000000000001 [ 30.424026] RBP: ffff8801ab69f288 R08: ffff8801d92a2080 R09: ffffed003b5e4fc0 [ 30.431281] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: dead000000000200 [ 30.438529] R13: dead000000000100 R14: ffff8801aaad22a8 R15: ffff8801aaad22b0 [ 30.445784] FS: 00007feaddbab700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 30.453985] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.459847] CR2: 00007ffe3f4de57c CR3: 00000001b5773000 CR4: 00000000001406e0 [ 30.467102] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.474364] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.481607] Call Trace: [ 30.484179] p9_fd_cancel+0x104/0x360 [ 30.487962] ? p9_fd_close+0x5b0/0x5b0 [ 30.491827] ? p9_pollwait+0x83/0x230 [ 30.495609] p9_client_rpc+0xf1f/0x1400 [ 30.499564] ? p9_client_prepare_req.part.9+0xcd0/0xcd0 [ 30.504908] ? ksys_dup3+0x690/0x690 [ 30.508614] ? check_same_owner+0x340/0x340 [ 30.512913] ? p9_fd_poll+0x2b0/0x2b0 [ 30.516694] ? finish_wait+0x430/0x430 [ 30.520563] ? kasan_unpoison_shadow+0x35/0x50 [ 30.525126] ? p9_fd_show_options+0x1c0/0x1c0 [ 30.529599] ? __raw_spin_lock_init+0x2d/0x100 [ 30.534161] p9_client_create+0xdbc/0x177c [ 30.538377] ? p9_client_read+0xc60/0xc60 [ 30.542511] ? kasan_check_read+0x11/0x20 [ 30.546644] ? lock_acquire+0x1e4/0x540 [ 30.550600] ? fs_reclaim_acquire+0x20/0x20 [ 30.554907] ? lock_release+0xa30/0xa30 [ 30.558859] ? __lockdep_init_map+0x105/0x590 [ 30.563337] ? kasan_check_write+0x14/0x20 [ 30.567563] ? __init_rwsem+0x1cc/0x2a0 [ 30.571517] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 30.576513] ? __kmalloc_track_caller+0x311/0x760 [ 30.581334] ? save_stack+0xa9/0xd0 [ 30.584940] ? save_stack+0x43/0xd0 [ 30.588542] ? kasan_kmalloc+0xc4/0xe0 [ 30.592409] ? kmem_cache_alloc_trace+0x152/0x780 [ 30.597227] ? memcpy+0x45/0x50 [ 30.600490] v9fs_session_init+0x21a/0x1a80 [ 30.604791] ? rcu_note_context_switch+0x730/0x730 [ 30.609698] ? do_mount+0x69e/0x1fb0 [ 30.613395] ? lock_acquire+0x1e4/0x540 [ 30.617346] ? v9fs_show_options+0x7e0/0x7e0 [ 30.621731] ? lock_release+0xa30/0xa30 [ 30.625685] ? check_same_owner+0x340/0x340 [ 30.629985] ? lock_downgrade+0x8f0/0x8f0 [ 30.634117] ? kasan_unpoison_shadow+0x35/0x50 [ 30.638676] ? kasan_kmalloc+0xc4/0xe0 [ 30.642542] ? kmem_cache_alloc_trace+0x318/0x780 [ 30.647366] ? kasan_unpoison_shadow+0x35/0x50 [ 30.651925] ? kasan_kmalloc+0xc4/0xe0 [ 30.655792] v9fs_mount+0x7c/0x900 [ 30.659314] ? v9fs_drop_inode+0x150/0x150 [ 30.663544] legacy_get_tree+0x118/0x440 [ 30.667589] vfs_get_tree+0x1cb/0x5c0 [ 30.671383] do_mount+0x6c1/0x1fb0 [ 30.674910] ? check_same_owner+0x340/0x340 [ 30.679209] ? lock_release+0xa30/0xa30 [ 30.683165] ? copy_mount_string+0x40/0x40 [ 30.687386] ? retint_kernel+0x10/0x10 [ 30.691253] ? copy_mount_options+0x1e3/0x380 [ 30.695725] ? copy_mount_options+0x1f0/0x380 [ 30.700200] ? copy_mount_options+0x1fa/0x380 [ 30.704690] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.710206] ? copy_mount_options+0x285/0x380 [ 30.714682] ksys_mount+0x12d/0x140 [ 30.718293] __x64_sys_mount+0xbe/0x150 [ 30.722248] do_syscall_64+0x1b9/0x820 [ 30.726121] ? finish_task_switch+0x1d3/0x870 [ 30.730594] ? syscall_return_slowpath+0x5e0/0x5e0 [ 30.735511] ? syscall_return_slowpath+0x31d/0x5e0 [ 30.740429] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 30.745423] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.750941] ? prepare_exit_to_usermode+0x291/0x3b0 [ 30.755937] ? perf_trace_sys_enter+0xb10/0xb10 [ 30.760589] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.765413] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.770582] RIP: 0033:0x446939 [ 30.773772] Code: e8 dc bc 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 2b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 30.792890] RSP: 002b:00007feaddbaada8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 30.800589] RAX: ffffffffffffffda RBX: 00000000006dcc44 RCX: 0000000000446939 [ 30.807850] RDX: 0000000020000780 RSI: 0000000020000740 RDI: 0000000000000000 [ 30.815098] RBP: 0000000000000000 R08: 00000000200007c0 R09: 0000000000000000 [ 30.822358] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000006dcc40 [ 30.829607] R13: 0030656c69662f2e R14: 64663d736e617274 R15: 0000000000000005 [ 30.836865] Modules linked in: [ 30.840040] Dumping ftrace buffer: [ 30.843565] (ftrace buffer empty) [ 30.847322] ---[ end trace 74d416288f75d678 ]--- [ 30.852097] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 [ 30.857981] Code: ff fd 0f 0b 4c 89 e2 48 89 de 48 c7 c7 40 88 1a 88 e8 0a 35 ff fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 e0 87 1a 88 e8 f6 34 ff fd <0f> 0b 48 89 de 48 c7 c7 00 89 1a 88 e8 e5 34 ff fd 0f 0b 48 89 de [ 30.877242] RSP: 0018:ffff8801ab69f270 EFLAGS: 00010286 [ 30.882613] RAX: 000000000000004e RBX: ffff8801aaad22a8 RCX: 0000000000000000 [ 30.889887] RDX: 0000000000000000 RSI: ffffffff81633fc1 RDI: 0000000000000001 [ 30.897178] RBP: ffff8801ab69f288 R08: ffff8801d92a2080 R09: ffffed003b5e4fc0 [ 30.904459] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: dead000000000200 [ 30.911733] R13: dead000000000100 R14: ffff8801aaad22a8 R15: ffff8801aaad22b0 [ 30.919034] FS: 00007feaddbab700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 30.927263] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.933142] CR2: 00007ffe3f4de57c CR3: 00000001b5773000 CR4: 00000000001406e0 [ 30.940416] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.947688] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.954959] Kernel panic - not syncing: Fatal exception [ 30.960778] Dumping ftrace buffer: [ 30.964300] (ftrace buffer empty) [ 30.967984] Kernel Offset: disabled [ 30.971596] Rebooting in 86400 seconds..