[ 16.484675] random: sshd: uninitialized urandom read (32 bytes read, 33 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: [ 20.593839] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.940338] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.570487] random: sshd: uninitialized urandom read (32 bytes read, 64 bits of entropy available) [ 31.181114] random: sshd: uninitialized urandom read (32 bytes read, 72 bits of entropy available) Warning: Permanently added '10.128.15.208' (ECDSA) to the list of known hosts. [ 36.535411] random: sshd: uninitialized urandom read (32 bytes read, 78 bits of entropy available) executing program [ 36.626688] sg_write: data in/out 117476602/1 bytes for SCSI command 0xe2-- guessing data in; [ 36.626688] program syzkaller645056 not setting count and/or reply_len properly [ 36.645184] kasan: CONFIG_KASAN_INLINE enabled [ 36.649672] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 36.662485] Dumping ftrace buffer: [ 36.665991] (ftrace buffer empty) [ 36.669670] Modules linked in: [ 36.672944] CPU: 1 PID: 3328 Comm: syzkaller645056 Not tainted 4.4.110-gdac1439 #13 [ 36.680702] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.690026] task: ffff8801d1112f80 task.stack: ffff8801cd120000 [ 36.696047] RIP: 0010:[] [] sg_read+0xd1d/0x1490 [ 36.704101] RSP: 0018:ffff8801cd127a80 EFLAGS: 00010246 [ 36.709515] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825bc124 [ 36.716764] RDX: 0000000000000000 RSI: 0000000020aaaf8f RDI: ffff8801d0c90170 [ 36.724003] RBP: ffff8801cd127b88 R08: 0000000000000000 R09: 0000000000000001 [ 36.731238] R10: 0000000000000000 R11: 1ffff10039a24f16 R12: 0000000000000071 [ 36.738475] R13: 0000000000000000 R14: ffff8801d051aae0 R15: ffff8801d0c90140 [ 36.745714] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000984a840 [ 36.753923] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 36.753925] CR2: 0000000020aaaf6b CR3: 00000001d23c4000 CR4: 0000000000160670 [ 36.753930] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.753932] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.753933] Stack: [ 36.753938] 0000000000000002 0000000000000002 ffff8801cd127c40 ffff8801d0c90158 [ 36.753942] 0000000000ffffff ffff8801d0c90168 0000000000000095 000000001199c3fa [ 36.753946] ffff8801d5683b80 0000000000001000 1ffff10039a24f5c 0000000020aaaf8f [ 36.753947] Call Trace: [ 36.753957] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 36.753967] [] ? fsnotify+0xee0/0xee0 [ 36.753974] [] ? avc_policy_seqno+0x9/0x20 [ 36.753981] [] do_loop_readv_writev+0x141/0x1e0 [ 36.753985] [] ? security_file_permission+0x89/0x1e0 [ 36.753989] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 36.753992] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 36.753997] [] compat_do_readv_writev+0x5df/0x6e0 [ 36.754000] [] ? vfs_writev+0xb0/0xb0 [ 36.754005] [] ? _raw_spin_unlock+0x2c/0x50 [ 36.754011] [] ? handle_mm_fault+0x3f2/0x3190 [ 36.754015] [] ? security_file_permission+0x89/0x1e0 [ 36.754018] [] ? rw_verify_area+0x100/0x2f0 [ 36.754022] [] compat_readv+0xd9/0x140 [ 36.754026] [] compat_SyS_readv+0xd8/0x1b0 [ 36.754030] [] ? SyS_pwritev+0x230/0x230 [ 36.754035] [] ? do_fast_syscall_32+0xd7/0x890 [ 36.754038] [] ? SyS_pwritev+0x230/0x230 [ 36.754041] [] do_fast_syscall_32+0x314/0x890 [ 36.754046] [] sysenter_flags_fixed+0xd/0x17 [ 36.754095] 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 [ 36.754099] RIP [] sg_read+0xd1d/0x1490 [ 36.754100] RSP [ 36.757960] ---[ end trace 372f0e32cb7b345b ]--- [ 36.757963] Kernel panic - not syncing: Fatal exception [ 36.760383] Dumping ftrace buffer: [ 36.760386] (ftrace buffer empty) [ 36.760388] Kernel Offset: disabled [ 36.980039] Rebooting in 86400 seconds..