[   16.280945] 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: [   21.789729] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   22.009766] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   22.765656] random: sshd: uninitialized urandom read (32 bytes read, 87 bits of entropy available)
[   22.918882] random: sshd: uninitialized urandom read (32 bytes read, 91 bits of entropy available)
Warning: Permanently added '10.128.15.198' (ECDSA) to the list of known hosts.
[   28.291591] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available)
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[   28.418976] kasan: CONFIG_KASAN_INLINE enabled
[   28.421803] kasan: CONFIG_KASAN_INLINE enabledkasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.421816] Dumping ftrace buffer:
[   28.421819]    (ftrace buffer empty)
[   28.421820] Modules linked in:
[   28.421825] CPU: 1 PID: 3327 Comm: syzkaller012751 Not tainted 4.4.107-g610c835 #4
[   28.421828] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.421830] task: ffff8801d19197c0 task.stack: ffff8801d0f68000
[   28.421832] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   28.421844] RSP: 0018:ffff8801d0f6f970  EFLAGS: 00010a07
[   28.421846] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   28.421848] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   28.421850] RBP: ffff8801d0f6f980 R08: 0000000000000001 R09: 0000000000000000
[   28.421852] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   28.421855] R13: 0000000000000020 R14: ffff8801d8652100 R15: dffffc0000000000
[   28.421858] FS:  0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:000000000940e840
[   28.421860] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   28.421862] CR2: 0000000020649000 CR3: 00000001d0dfe000 CR4: 00000000001406e0
[   28.421867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.421869] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.421869] Stack:
[   28.421871]  0000000000000000 ffff8801d8652258 ffff8801d0f6f9e0 ffffffff825b8cf1
[   28.421876]  ffff8801d8652270 ffffed003b0ca44b ffffed003b0ca44e ffff8801d8652268
[   28.421880]  dead4ead00000000 ffff8801d8652240 0000000000000000 0000000000000000
[   28.421884] Call Trace:
[   28.421891]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   28.421895]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   28.421899]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   28.421903]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   28.421906]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   28.421910]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.421914]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   28.421921]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   28.421927]  [<ffffffff8151b341>] do_loop_readv_writev+0x141/0x1e0
[   28.421932]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   28.421936]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.421939]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.421943]  [<ffffffff8151dedf>] compat_do_readv_writev+0x5df/0x6e0
[   28.421947]  [<ffffffff8151d900>] ? vfs_writev+0xb0/0xb0
[   28.421952]  [<ffffffff8377322c>] ? _raw_spin_unlock+0x2c/0x50
[   28.421957]  [<ffffffff8149e232>] ? handle_mm_fault+0x3f2/0x3190
[   28.421961]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   28.421965]  [<ffffffff8151e0b9>] compat_readv+0xd9/0x140
[   28.421968]  [<ffffffff81520448>] compat_SyS_readv+0xd8/0x1b0
[   28.421971]  [<ffffffff81520370>] ? SyS_pwritev+0x230/0x230
[   28.421976]  [<ffffffff81006b47>] ? do_fast_syscall_32+0xd7/0x890
[   28.421979]  [<ffffffff81520370>] ? SyS_pwritev+0x230/0x230
[   28.421982]  [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890
[   28.421987]  [<ffffffff837754d7>] sysenter_flags_fixed+0xd/0x17
[   28.421988] Code: 76 ae 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 
[   28.422048] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   28.422052]  RSP <ffff8801d0f6f970>
[   28.422056] ---[ end trace f01d9c64836d88e9 ]---
[   28.422058] Kernel panic - not syncing: Fatal exception
[   28.423782] Dumping ftrace buffer:
[   28.423783]    (ftrace buffer empty)
[   28.423785] Kernel Offset: disabled
[   28.788996] Rebooting in 86400 seconds..