[ 15.634449] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.251243] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 20.512816] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.378209] random: sshd: uninitialized urandom read (32 bytes read, 110 bits of entropy available) [ 32.325136] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts. [ 37.885482] random: sshd: uninitialized urandom read (32 bytes read, 123 bits of entropy available) executing program [ 37.975804] sg_write: data in/out 1505792696/163 bytes for SCSI command 0xdb-- guessing data in; [ 37.975804] program syzkaller166525 not setting count and/or reply_len properly [ 37.993594] kasan: CONFIG_KASAN_INLINE enabled [ 37.998032] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 38.010840] Dumping ftrace buffer: [ 38.014347] (ftrace buffer empty) [ 38.018027] Modules linked in: [ 38.021300] CPU: 1 PID: 3331 Comm: syzkaller166525 Not tainted 4.4.110-gdac1439 #13 [ 38.029063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.039172] task: ffff8801d2404740 task.stack: ffff8801d0540000 [ 38.045205] RIP: 0010:[] [] sg_read+0xd1d/0x1490 [ 38.053264] RSP: 0018:ffff8801d0547a80 EFLAGS: 00010246 [ 38.058681] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825bc124 [ 38.065919] RDX: 0000000000000000 RSI: 00000000203d4024 RDI: ffff8800b4ef2270 [ 38.073174] RBP: ffff8801d0547b88 R08: 0000000000000000 R09: 0000000000000001 [ 38.080422] R10: 0000000000000000 R11: 1ffff1003a0a8f16 R12: 0000000000000081 [ 38.087671] R13: 0000000000000000 R14: ffff8801d39e9240 R15: ffff8800b4ef2240 [ 38.094917] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009517840 [ 38.103111] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 38.108961] CR2: 00000000204bb000 CR3: 00000001d5628000 CR4: 0000000000160670 [ 38.116201] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.123439] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.130677] Stack: [ 38.132791] 0000000000000002 0000000000000002 ffff8801d0547c40 ffff8800b4ef2258 [ 38.140745] b2021100cc270e31 ffff8800b4ef2268 00000000000000a5 000000001199c3fa [ 38.148697] ffff8800b7e04a00 0000000000001000 1ffff1003a0a8f5c 00000000203d4024 [ 38.156644] Call Trace: [ 38.159209] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 38.169674] [] ? fsnotify+0xee0/0xee0 [ 38.175097] [] ? avc_policy_seqno+0x9/0x20 [ 38.180960] [] do_loop_readv_writev+0x141/0x1e0 [ 38.187245] [] ? security_file_permission+0x89/0x1e0 [ 38.193969] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 38.200602] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 38.207234] [] compat_do_readv_writev+0x5df/0x6e0 [ 38.214238] [] ? vfs_writev+0xb0/0xb0 [ 38.219673] [] ? _raw_spin_unlock+0x2c/0x50 [ 38.225657] [] ? handle_mm_fault+0x3f2/0x3190 [ 38.231789] [] ? security_file_permission+0x89/0x1e0 [ 38.238513] [] ? rw_verify_area+0x100/0x2f0 [ 38.244463] [] compat_readv+0xd9/0x140 [ 38.249964] [] compat_SyS_readv+0xd8/0x1b0 [ 38.255822] [] ? SyS_pwritev+0x230/0x230 [ 38.261506] [] ? do_fast_syscall_32+0xd7/0x890 [ 38.267715] [] ? SyS_pwritev+0x230/0x230 [ 38.273403] [] do_fast_syscall_32+0x314/0x890 [ 38.279515] [] sysenter_flags_fixed+0xd/0x17 [ 38.285637] 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 [ 38.311985] RIP [] sg_read+0xd1d/0x1490 [ 38.317688] RSP [ 38.322136] ---[ end trace afab41c69714718b ]--- [ 38.326919] Kernel panic - not syncing: Fatal exception [ 38.332698] Dumping ftrace buffer: [ 38.336210] (ftrace buffer empty) [ 38.339888] Kernel Offset: disabled [ 38.343479] Rebooting in 86400 seconds..