[ 16.585856] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.630140] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.965482] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.814309] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available) [ 24.558899] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) Warning: Permanently added '10.128.15.193' (ECDSA) to the list of known hosts. [ 29.942160] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) executing program [ 30.034366] sg_write: data in/out 1562545400/3 bytes for SCSI command 0x0-- guessing data in; [ 30.034366] program syzkaller019734 not setting count and/or reply_len properly [ 30.053208] kasan: CONFIG_KASAN_INLINE enabled [ 30.057645] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.070758] Dumping ftrace buffer: [ 30.074260] (ftrace buffer empty) [ 30.077934] Modules linked in: [ 30.081204] CPU: 0 PID: 3316 Comm: syzkaller019734 Not tainted 4.4.107-g610c835 #12 [ 30.088957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.098282] task: ffff8800b5b94740 task.stack: ffff8800b4a28000 [ 30.104306] RIP: 0010:[] [] sg_read+0xd1d/0x1490 [ 30.112359] RSP: 0018:ffff8800b4a2fb00 EFLAGS: 00010246 [ 30.117770] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825bb194 [ 30.125004] RDX: 0000000000000000 RSI: 0000000020563024 RDI: ffff8800b4090170 [ 30.132244] RBP: ffff8800b4a2fc08 R08: 0000000000000000 R09: 0000000000000001 [ 30.139478] R10: 0000000000000000 R11: 1ffff10016945f26 R12: 0000000000000fdc [ 30.146715] R13: 0000000000000000 R14: ffff8801d09539c0 R15: ffff8800b4090140 [ 30.153962] FS: 0000000002230880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 30.162151] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.167998] CR2: 0000000020563000 CR3: 00000000b64ea000 CR4: 00000000001406f0 [ 30.175245] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.182480] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.189717] Stack: [ 30.191828] 0000000000000000 000077ff80000000 ffff8800b4a2fb60 ffff8800b4090158 [ 30.199767] 0000000000000008 ffff8800b4090168 0000000000001000 0000000000000001 [ 30.207711] ffff8801d5649680 0000000000001000 1ffff10016945f6c 0000000020563024 [ 30.215650] Call Trace: [ 30.218206] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.224843] [] ? fsnotify+0xee0/0xee0 [ 30.230260] [] ? avc_policy_seqno+0x9/0x20 [ 30.236113] [] do_loop_readv_writev+0x141/0x1e0 [ 30.242400] [] ? security_file_permission+0x89/0x1e0 [ 30.249118] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.255754] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.262394] [] do_readv_writev+0x5dd/0x6e0 [ 30.268255] [] ? vfs_write+0x530/0x530 [ 30.273765] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.279707] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 30.286693] [] ? handle_mm_fault+0x3f2/0x3190 [ 30.292802] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.299607] [] ? avc_policy_seqno+0x9/0x20 [ 30.305457] [] ? selinux_file_permission+0x348/0x460 [ 30.312174] [] vfs_readv+0x78/0xb0 [ 30.317331] [] SyS_readv+0xd9/0x240 [ 30.322573] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 30.329119] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 30.335663] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 30.342202] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 97 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 6b 06 00 00 48 8b 1b 48 85 db 0f 84 3b 03 00 [ 30.368488] RIP [] sg_read+0xd1d/0x1490 [ 30.374196] RSP [ 30.378035] ---[ end trace 4ac72016a9fad152 ]--- [ 30.382763] Kernel panic - not syncing: Fatal exception [ 30.388601] Dumping ftrace buffer: [ 30.392112] (ftrace buffer empty) [ 30.395793] Kernel Offset: disabled [ 30.399384] Rebooting in 86400 seconds..