[ 16.307397] 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: [ 21.473521] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.745479] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.559003] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) [ 28.541888] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts. [ 33.929836] random: sshd: uninitialized urandom read (32 bytes read, 115 bits of entropy available) executing program [ 34.040627] sg_write: data in/out 36090/116 bytes for SCSI command 0x67-- guessing data in; [ 34.040627] program syzkaller761526 not setting count and/or reply_len properly [ 34.057798] kasan: CONFIG_KASAN_INLINE enabled [ 34.062183] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 34.075558] Dumping ftrace buffer: [ 34.079065] (ftrace buffer empty) [ 34.082742] Modules linked in: [ 34.086017] CPU: 1 PID: 3318 Comm: syzkaller761526 Not tainted 4.4.110-gdac1439 #13 [ 34.093774] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.103097] task: ffff8800b5f78000 task.stack: ffff8801d0ae8000 [ 34.109120] RIP: 0010:[] [] sg_read+0xd1d/0x1490 [ 34.117169] RSP: 0018:ffff8801d0aefa80 EFLAGS: 00010246 [ 34.122584] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825bc124 [ 34.129822] RDX: 0000000000000000 RSI: 0000000020f93fef RDI: ffff8800b48a0170 [ 34.137059] RBP: ffff8801d0aefb88 R08: 0000000000000000 R09: 0000000000000001 [ 34.144294] R10: 0000000000000000 R11: 1ffff1003a15df16 R12: 000000000000001a [ 34.151534] R13: 0000000000000000 R14: ffff8801d18c8600 R15: ffff8800b48a0140 [ 34.158773] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:0000000009796840 [ 34.166963] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.172827] CR2: 0000000020f93fcb CR3: 00000001d0f9e000 CR4: 0000000000160670 [ 34.180066] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.187305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.194538] Stack: [ 34.196653] 0000000000000002 0000000000000002 ffff8801d0aefc40 ffff8800b48a0158 [ 34.204605] bcd25eed6a43cc1d ffff8800b48a0168 000000000000003e 000000001199c3fa [ 34.212554] ffff8800b7f79680 0000000000001000 1ffff1003a15df5c 0000000020f93fef [ 34.220503] Call Trace: [ 34.223059] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 34.229692] [] ? fsnotify+0xee0/0xee0 [ 34.235110] [] ? avc_policy_seqno+0x9/0x20 [ 34.240975] [] do_loop_readv_writev+0x141/0x1e0 [ 34.247257] [] ? security_file_permission+0x89/0x1e0 [ 34.253972] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 34.260601] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 34.267231] [] compat_do_readv_writev+0x5df/0x6e0 [ 34.273685] [] ? vfs_writev+0xb0/0xb0 [ 34.279102] [] ? _raw_spin_unlock+0x2c/0x50 [ 34.285038] [] ? handle_mm_fault+0x3f2/0x3190 [ 34.291147] [] ? security_file_permission+0x89/0x1e0 [ 34.297865] [] ? rw_verify_area+0x100/0x2f0 [ 34.303801] [] compat_readv+0xd9/0x140 [ 34.309302] [] compat_SyS_readv+0xd8/0x1b0 [ 34.315152] [] ? SyS_pwritev+0x230/0x230 [ 34.320828] [] ? do_fast_syscall_32+0xd7/0x890 [ 34.327023] [] ? SyS_pwritev+0x230/0x230 [ 34.332700] [] do_fast_syscall_32+0x314/0x890 [ 34.338811] [] sysenter_flags_fixed+0xd/0x17 [ 34.344831] 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 [ 34.371153] RIP [] sg_read+0xd1d/0x1490 [ 34.376857] RSP [ 34.380791] ---[ end trace ed866fbf882c58a3 ]--- [ 34.385549] Kernel panic - not syncing: Fatal exception [ 34.391272] Dumping ftrace buffer: [ 34.394784] (ftrace buffer empty) [ 34.398461] Kernel Offset: disabled [ 34.402050] Rebooting in 86400 seconds..