[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[   17.109858] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available)
[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   21.064682] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   21.410936] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   22.161892] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available)
[   22.975672] random: sshd: uninitialized urandom read (32 bytes read, 95 bits of entropy available)
Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts.
[   28.352625] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available)
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[   28.514692] kasan: CONFIG_KASAN_INLINE enabled
[   28.538737] kasan: GPF could be caused by NULL-ptr deref or user memory accesskasan: CONFIG_KASAN_INLINE enabled
[   28.543437] kasan: GPF could be caused by NULL-ptr deref or user memory access
[   28.543442] general protection fault: 0000 [#1] PREEMPT SMP KASAN
[   28.543446] Dumping ftrace buffer:
[   28.543449]    (ftrace buffer empty)
[   28.543453] Modules linked in:
[   28.543460] CPU: 1 PID: 3320 Comm: syzkaller532988 Not tainted 4.4.107-g610c835 #12
[   28.543463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   28.543467] task: ffff8800b487df00 task.stack: ffff8800b3ca8000
[   28.543482] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   28.543485] RSP: 0018:ffff8800b3caf9f0  EFLAGS: 00010a07
[   28.543489] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   28.543492] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c
[   28.543496] RBP: ffff8800b3cafa00 R08: 0000000000000001 R09: 0000000000000000
[   28.543499] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   28.543502] R13: 0000000000000020 R14: ffff8801d2a6a100 R15: dffffc0000000000
[   28.543507] FS:  00000000013c5880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000
[   28.543511] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   28.543514] CR2: 0000000020c8d000 CR3: 00000000b45d3000 CR4: 00000000001406e0
[   28.543521] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   28.543524] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   28.543526] Stack:
[   28.543533]  0000000000000000 ffff8801d2a6a258 ffff8800b3cafa60 ffffffff825b8cf1
[   28.543540]  ffff8801d2a6a270 ffffed003a54d44b ffffed003a54d44e ffff8801d2a6a268
[   28.543547]  dead4ead00000000 ffff8801d2a6a240 0000000000000000 0000000000000000
[   28.543549] Call Trace:
[   28.543559]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   28.543566]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   28.543573]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   28.543578]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   28.543584]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   28.543593]  [<ffffffff81513314>] ? __check_object_size+0x154/0x35b
[   28.543600]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.543606]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   28.543615]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   28.543623]  [<ffffffff8151b341>] do_loop_readv_writev+0x141/0x1e0
[   28.543629]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   28.543636]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.543643]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   28.543649]  [<ffffffff8151d69d>] do_readv_writev+0x5dd/0x6e0
[   28.543655]  [<ffffffff8151d0c0>] ? vfs_write+0x530/0x530
[   28.543662]  [<ffffffff8377322c>] ? _raw_spin_unlock+0x2c/0x50
[   28.543668]  [<ffffffff8150bc5d>] ? do_huge_pmd_anonymous_page+0x3dd/0xa10
[   28.543675]  [<ffffffff8149e232>] ? handle_mm_fault+0x3f2/0x3190
[   28.543682]  [<ffffffff81233a2b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   28.543689]  [<ffffffff8151d818>] vfs_readv+0x78/0xb0
[   28.543694]  [<ffffffff8151fb69>] SyS_readv+0xd9/0x240
[   28.543700]  [<ffffffff8151fa90>] ? rw_copy_check_uvector+0x2d0/0x2d0
[   28.543706]  [<ffffffff81003017>] ? trace_hardirqs_on_thunk+0x17/0x19
[   28.543713]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   28.543800] 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 
[   28.543806] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   28.543808]  RSP <ffff8800b3caf9f0>
[   28.543814] ---[ end trace 0f24c40d3a1dab5a ]---
[   28.543817] Kernel panic - not syncing: Fatal exception
[   28.546816] Dumping ftrace buffer:
[   28.546818]    (ftrace buffer empty)
[   28.546821] Kernel Offset: disabled
[   28.906102] Rebooting in 86400 seconds..