[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.327677] random: sshd: uninitialized urandom read (32 bytes read) [ 20.395942] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 20.662199] random: sshd: uninitialized urandom read (32 bytes read) [ 21.533890] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.693136] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.56' (ECDSA) to the list of known hosts. [ 27.176267] 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 [ 35.894448] list_del corruption, ffff8801b01a98a8->next is LIST_POISON1 (dead000000000100) [ 35.903224] ------------[ cut here ]------------ [ 35.907967] kernel BUG at lib/list_debug.c:47! [ 35.912592] invalid opcode: 0000 [#1] SMP KASAN [ 35.917255] CPU: 1 PID: 5107 Comm: syz-executor224 Not tainted 4.18.0-rc4+ #142 [ 35.924681] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.934525] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 [ 35.940387] Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 66 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 65 1a 88 e8 36 6e 02 fe <0f> 0b 48 89 de 48 c7 c7 e0 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de [ 35.959506] RSP: 0018:ffff8801b01a71c0 EFLAGS: 00010286 [ 35.964935] RAX: 000000000000004e RBX: ffff8801b01a98a8 RCX: 0000000000000000 [ 35.972185] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 35.979457] RBP: ffff8801b01a71d8 R08: ffff8801d86c2640 R09: ffffed003b5e4fc0 [ 35.986713] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: dead000000000200 [ 35.993973] R13: dead000000000100 R14: ffff8801b01a98a8 R15: ffff8801b01a98b0 [ 36.001224] FS: 00007fb40b41b700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 36.009446] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.015314] CR2: 00007fb40b41ae78 CR3: 00000001d890c000 CR4: 00000000001406e0 [ 36.022569] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.030971] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.038238] Call Trace: [ 36.040812] p9_fd_cancel+0x104/0x360 [ 36.044598] ? p9_fd_close+0x5b0/0x5b0 [ 36.048652] ? p9_pollwait+0x83/0x230 [ 36.052444] p9_client_rpc+0xf1f/0x1400 [ 36.056402] ? p9_client_prepare_req.part.8+0xcd0/0xcd0 [ 36.061757] ? __fget+0x414/0x670 [ 36.065192] ? rcu_is_watching+0x61/0x150 [ 36.069497] ? expand_files.part.8+0x9c0/0x9c0 [ 36.074060] ? finish_wait+0x430/0x430 [ 36.077935] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.082937] ? p9_fd_show_options+0x1c0/0x1c0 [ 36.087425] ? lockdep_init_map+0x9/0x10 [ 36.091481] p9_client_create+0xd09/0x16c9 [ 36.095706] ? p9_client_read+0xc60/0xc60 [ 36.099853] ? find_held_lock+0x36/0x1c0 [ 36.103901] ? __lockdep_init_map+0x105/0x590 [ 36.108382] ? kasan_check_write+0x14/0x20 [ 36.112596] ? __init_rwsem+0x1cc/0x2a0 [ 36.116551] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 36.121551] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.126553] ? __kmalloc_track_caller+0x5f5/0x760 [ 36.131468] ? save_stack+0xa9/0xd0 [ 36.135084] ? save_stack+0x43/0xd0 [ 36.138689] ? kasan_kmalloc+0xc4/0xe0 [ 36.142554] ? kmem_cache_alloc_trace+0x152/0x780 [ 36.147379] ? memcpy+0x45/0x50 [ 36.150656] v9fs_session_init+0x21a/0x1a80 [ 36.154958] ? find_held_lock+0x36/0x1c0 [ 36.159004] ? v9fs_show_options+0x7e0/0x7e0 [ 36.163392] ? kasan_check_read+0x11/0x20 [ 36.167606] ? rcu_is_watching+0x8c/0x150 [ 36.171733] ? rcu_pm_notify+0xc0/0xc0 [ 36.175618] ? v9fs_mount+0x61/0x900 [ 36.179326] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.184328] ? kmem_cache_alloc_trace+0x616/0x780 [ 36.189154] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 36.194682] v9fs_mount+0x7c/0x900 [ 36.198205] mount_fs+0xae/0x328 [ 36.201553] vfs_kern_mount.part.34+0xdc/0x4e0 [ 36.206128] ? may_umount+0xb0/0xb0 [ 36.209738] ? _raw_read_unlock+0x22/0x30 [ 36.213879] ? __get_fs_type+0x97/0xc0 [ 36.217762] do_mount+0x581/0x30e0 [ 36.221287] ? do_raw_spin_unlock+0xa7/0x2f0 [ 36.225729] ? copy_mount_string+0x40/0x40 [ 36.229954] ? copy_mount_options+0x5f/0x380 [ 36.234359] ? rcu_read_lock_sched_held+0x108/0x120 [ 36.239372] ? kmem_cache_alloc_trace+0x616/0x780 [ 36.244220] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 36.249741] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 36.255287] ? copy_mount_options+0x285/0x380 [ 36.259766] ksys_mount+0x12d/0x140 [ 36.263377] __x64_sys_mount+0xbe/0x150 [ 36.267334] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 36.272332] do_syscall_64+0x1b9/0x820 [ 36.276291] ? syscall_return_slowpath+0x5e0/0x5e0 [ 36.281201] ? syscall_return_slowpath+0x31d/0x5e0 [ 36.286631] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 36.291976] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.296806] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.301982] RIP: 0033:0x445d49 [ 36.305147] Code: e8 ec ba 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 ab 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 36.324279] RSP: 002b:00007fb40b41ada8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 36.331974] RAX: ffffffffffffffda RBX: 00000000006dbc3c RCX: 0000000000445d49 [ 36.339225] RDX: 0000000020000300 RSI: 0000000020000100 RDI: 0000000000000000 [ 36.346473] RBP: 0000000000000000 R08: 0000000020000240 R09: 0000000000000000 [ 36.353728] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000006dbc38 [ 36.360979] R13: 0030656c69662f2e R14: 64663d736e617274 R15: 0000000000000004 [ 36.368235] Modules linked in: [ 36.371411] Dumping ftrace buffer: [ 36.374949] (ftrace buffer empty) [ 36.378705] ---[ end trace 78ef8bc03ba95483 ]--- [ 36.383487] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 [ 36.389562] Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 66 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 65 1a 88 e8 36 6e 02 fe <0f> 0b 48 89 de 48 c7 c7 e0 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de [ 36.408742] RSP: 0018:ffff8801b01a71c0 EFLAGS: 00010286 [ 36.414123] RAX: 000000000000004e RBX: ffff8801b01a98a8 RCX: 0000000000000000 [ 36.421410] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 36.428679] RBP: ffff8801b01a71d8 R08: ffff8801d86c2640 R09: ffffed003b5e4fc0 [ 36.436131] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: dead000000000200 [ 36.443400] R13: dead000000000100 R14: ffff8801b01a98a8 R15: ffff8801b01a98b0 [ 36.450735] FS: 00007fb40b41b700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 36.458962] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.465722] CR2: 00007fb40b41ae78 CR3: 00000001d890c000 CR4: 00000000001406e0 [ 36.473024] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.480394] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.487752] Kernel panic - not syncing: Fatal exception [ 36.493677] Dumping ftrace buffer: [ 36.497194] (ftrace buffer empty) [ 36.500884] Kernel Offset: disabled [ 36.504504] Rebooting in 86400 seconds..