[   16.948303] random: sshd: uninitialized urandom read (32 bytes read, 33 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: [   20.528879] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   20.830582] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   21.769728] random: sshd: uninitialized urandom read (32 bytes read, 114 bits of entropy available)
[   21.936043] random: sshd: uninitialized urandom read (32 bytes read, 118 bits of entropy available)
Warning: Permanently added '10.128.15.246' (ECDSA) to the list of known hosts.
[   33.377739] random: sshd: uninitialized urandom read (32 bytes read, 125 bits of entropy available)
executing program
[   33.490363] kasan: CONFIG_KASAN_INLINE enabled
[   33.495143] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   33.507957] Dumping ftrace buffer:
[   33.511461]    (ftrace buffer empty)
[   33.515139] Modules linked in:
[   33.518410] CPU: 0 PID: 3328 Comm: syzkaller374282 Not tainted 4.4.107-g610c835 #4
[   33.526082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   33.535403] task: ffff8801d1afdf00 task.stack: ffff8801d0ba8000
[   33.541424] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   33.549657] RSP: 0018:ffff8801d0bafa90  EFLAGS: 00010a07
[   33.555082] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   33.562319] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c
[   33.569557] RBP: ffff8801d0bafaa0 R08: ffffed00169fbd54 R09: ffff8800b4fdea80
[   33.576797] R10: 0000000000000005 R11: ffffed00169fbd54 R12: 0000000000000004
[   33.584035] R13: 0000000000000020 R14: ffff8801d0e5a100 R15: dffffc0000000000
[   33.591272] FS:  0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009035840
[   33.599465] CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
[   33.605313] CR2: 0000000020ef7fa5 CR3: 00000001d1636000 CR4: 00000000001406f0
[   33.612552] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   33.619788] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   33.627025] Stack:
[   33.629139]  0000000000000000 ffff8801d0e5a258 ffff8801d0bafb00 ffffffff825b8cf1
[   33.637086]  ffff8801d0e5a270 ffffed003a1cb44b ffffed003a1cb44e ffff8801d0e5a268
[   33.645034]  dead4ead00000000 ffff8801d0e5a240 0000000000000000 0000000000000000
[   33.652993] Call Trace:
[   33.655553]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   33.662009]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   33.668045]  [<ffffffff825baed1>] sg_read+0xa21/0x1490
[   33.673292]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   33.679926]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   33.686573]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   33.691987]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   33.697924]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   33.703339]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   33.708756]  [<ffffffff8149ea35>] ? handle_mm_fault+0xbf5/0x3190
[   33.714868]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   33.720717]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   33.727436]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   33.734154]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   33.740093]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   33.745338]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   33.750493]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   33.756170]  [<ffffffff81006b47>] ? do_fast_syscall_32+0xd7/0x890
[   33.762382]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   33.768093]  [<ffffffff81006d84>] do_fast_syscall_32+0x314/0x890
[   33.774213]  [<ffffffff837754d7>] sysenter_flags_fixed+0xd/0x17
[   33.780237] 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 
[   33.806584] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   33.812482]  RSP <ffff8801d0bafa90>
[   33.816285] ---[ end trace c8071bc5e5802adb ]---
[   33.821034] Kernel panic - not syncing: Fatal exception
[   33.826810] Dumping ftrace buffer:
[   33.830329]    (ftrace buffer empty)
[   33.834008] Kernel Offset: disabled
[   33.837605] Rebooting in 86400 seconds..