[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 17.565152] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.933091] random: sshd: uninitialized urandom read (32 bytes read) [ 21.362393] random: sshd: uninitialized urandom read (32 bytes read) [ 22.096251] random: sshd: uninitialized urandom read (32 bytes read) [ 73.411896] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts. [ 78.830108] 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 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 [ 80.504040] list_del corruption. next->prev should be ffff8801c3c21568, but was ffff8801d9adf3b0 [ 80.513168] ------------[ cut here ]------------ [ 80.517904] kernel BUG at lib/list_debug.c:56! [ 80.522531] invalid opcode: 0000 [#1] SMP KASAN [ 80.527234] CPU: 1 PID: 5316 Comm: syz-executor454 Not tainted 4.18.0-rc4-next-20180710+ #3 [ 80.535726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.545084] RIP: 0010:__list_del_entry_valid.cold.1+0x37/0x58 executing program executing program executing program executing program [ 80.550946] Code: e8 fa 1e ff fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 40 86 1a 88 e8 e6 1e ff fd 0f 0b 48 89 de 48 c7 c7 60 87 1a 88 e8 d5 1e ff fd <0f> 0b 48 89 de 48 c7 c7 00 87 1a 88 e8 c4 1e ff fd 0f 0b 90 90 90 [ 80.570071] RSP: 0018:ffff8801c95ff270 EFLAGS: 00010286 [ 80.575417] RAX: 0000000000000054 RBX: ffff8801c3c21568 RCX: 0000000000000000 [ 80.582666] RDX: 0000000000000000 RSI: ffffffff81634451 RDI: 0000000000000001 [ 80.589918] RBP: ffff8801c95ff288 R08: ffff8801d76fc3c0 R09: ffffed003b5e4fc0 [ 80.597169] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: ffff8801d9adf3b0 [ 80.604431] R13: ffff8801d9adf3b0 R14: ffff8801c3c21568 R15: ffff8801c3c21570 [ 80.611681] FS: 00007f320602b700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 80.619887] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.625753] CR2: 000000000046a440 CR3: 00000001d8ab5000 CR4: 00000000001406e0 [ 80.633019] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.640272] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.647529] Call Trace: [ 80.650111] p9_fd_cancel+0x104/0x360 [ 80.653905] ? p9_fd_close+0x5b0/0x5b0 [ 80.657770] ? p9_pollwait+0x83/0x230 [ 80.661559] p9_client_rpc+0xf1f/0x1400 [ 80.665517] ? p9_client_prepare_req.part.9+0xcd0/0xcd0 [ 80.670869] ? ksys_dup3+0x690/0x690 [ 80.674581] ? check_same_owner+0x340/0x340 [ 80.678888] ? p9_fd_poll+0x2b0/0x2b0 [ 80.682674] ? finish_wait+0x430/0x430 [ 80.686552] ? kasan_unpoison_shadow+0x35/0x50 [ 80.691124] ? p9_fd_show_options+0x1c0/0x1c0 [ 80.695690] ? __raw_spin_lock_init+0x2d/0x100 [ 80.700269] p9_client_create+0xd09/0x16c9 [ 80.704487] ? p9_client_read+0xc60/0xc60 [ 80.708623] ? kasan_check_read+0x11/0x20 [ 80.712759] ? lock_acquire+0x1e4/0x540 [ 80.716712] ? fs_reclaim_acquire+0x20/0x20 [ 80.721015] ? lock_release+0xa30/0xa30 [ 80.724969] ? __lockdep_init_map+0x105/0x590 [ 80.729449] ? kasan_check_write+0x14/0x20 [ 80.733670] ? __init_rwsem+0x1cc/0x2a0 [ 80.737635] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 80.742634] ? __kmalloc_track_caller+0x311/0x760 [ 80.747459] ? save_stack+0xa9/0xd0 [ 80.751069] ? save_stack+0x43/0xd0 [ 80.754679] ? kasan_kmalloc+0xc4/0xe0 [ 80.758558] ? kmem_cache_alloc_trace+0x152/0x780 [ 80.763380] ? memcpy+0x45/0x50 [ 80.766644] v9fs_session_init+0x21a/0x1a80 [ 80.770950] ? rcu_note_context_switch+0x730/0x730 [ 80.775869] ? do_mount+0x69e/0x1fb0 [ 80.779569] ? lock_acquire+0x1e4/0x540 [ 80.784005] ? lock_downgrade+0x8f0/0x8f0 [ 80.788146] ? v9fs_show_options+0x7e0/0x7e0 [ 80.792540] ? kasan_check_read+0x11/0x20 [ 80.796843] ? do_raw_spin_unlock+0xa7/0x2f0 [ 80.801231] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 80.805798] ? kasan_check_write+0x14/0x20 [ 80.810014] ? do_raw_spin_lock+0xc1/0x200 [ 80.814233] ? kasan_unpoison_shadow+0x35/0x50 [ 80.818790] ? kasan_kmalloc+0xc4/0xe0 [ 80.822658] ? kmem_cache_alloc_trace+0x318/0x780 [ 80.827481] ? kasan_unpoison_shadow+0x35/0x50 [ 80.832043] ? kasan_kmalloc+0xc4/0xe0 [ 80.835913] v9fs_mount+0x7c/0x900 [ 80.839435] ? v9fs_drop_inode+0x150/0x150 [ 80.843651] legacy_get_tree+0x118/0x440 [ 80.847701] vfs_get_tree+0x1cb/0x5c0 [ 80.851481] do_mount+0x6c1/0x1fb0 [ 80.855011] ? kasan_check_write+0x14/0x20 [ 80.859234] ? copy_mount_string+0x40/0x40 [ 80.863458] ? kasan_kmalloc+0xc4/0xe0 [ 80.867342] ? kmem_cache_alloc_trace+0x318/0x780 [ 80.872189] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 80.877731] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.883262] ? copy_mount_options+0x285/0x380 [ 80.887746] ksys_mount+0x12d/0x140 [ 80.891356] __x64_sys_mount+0xbe/0x150 [ 80.895316] do_syscall_64+0x1b9/0x820 [ 80.899185] ? finish_task_switch+0x1d3/0x870 [ 80.903657] ? syscall_return_slowpath+0x5e0/0x5e0 [ 80.908566] ? syscall_return_slowpath+0x31d/0x5e0 [ 80.913475] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 80.918473] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 80.923306] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.928476] RIP: 0033:0x445e59 [ 80.931651] Code: e8 ac e7 ff ff 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 fb 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 80.950775] RSP: 002b:00007f320602ada8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 80.958462] RAX: ffffffffffffffda RBX: 00000000006dbc3c RCX: 0000000000445e59 [ 80.965715] RDX: 0000000020000480 RSI: 00000000200002c0 RDI: 0000000000000000 [ 80.973059] RBP: 0000000000000000 R08: 0000000020000040 R09: 0000000000000000 [ 80.980319] R10: 0000000000000003 R11: 0000000000000202 R12: 00000000006dbc38 [ 80.987563] R13: 0030656c69662f2e R14: 64663d736e617274 R15: 0000000000000004 [ 80.994906] Modules linked in: [ 80.998078] Dumping ftrace buffer: [ 81.001588] (ftrace buffer empty) [ 81.005348] ---[ end trace 6a0eb6a8277ab3dc ]--- [ 81.010113] RIP: 0010:__list_del_entry_valid.cold.1+0x37/0x58 [ 81.015989] Code: e8 fa 1e ff fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 40 86 1a 88 e8 e6 1e ff fd 0f 0b 48 89 de 48 c7 c7 60 87 1a 88 e8 d5 1e ff fd <0f> 0b 48 89 de 48 c7 c7 00 87 1a 88 e8 c4 1e ff fd 0f 0b 90 90 90 [ 81.035167] RSP: 0018:ffff8801c95ff270 EFLAGS: 00010286 [ 81.040527] RAX: 0000000000000054 RBX: ffff8801c3c21568 RCX: 0000000000000000 [ 81.047891] RDX: 0000000000000000 RSI: ffffffff81634451 RDI: 0000000000000001 [ 81.055155] RBP: ffff8801c95ff288 R08: ffff8801d76fc3c0 R09: ffffed003b5e4fc0 [ 81.062448] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: ffff8801d9adf3b0 [ 81.069714] R13: ffff8801d9adf3b0 R14: ffff8801c3c21568 R15: ffff8801c3c21570 [ 81.077182] FS: 00007f320602b700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 81.085403] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.091285] CR2: 000000000046a440 CR3: 00000001d8ab5000 CR4: 00000000001406e0 [ 81.098670] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.105951] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.113224] Kernel panic - not syncing: Fatal exception [ 81.119094] Dumping ftrace buffer: [ 81.122607] (ftrace buffer empty) [ 81.126302] Kernel Offset: disabled [ 81.129908] Rebooting in 86400 seconds..