[   16.427841] 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: [   22.029053] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   22.443961] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available)
[   23.197959] random: sshd: uninitialized urandom read (32 bytes read, 92 bits of entropy available)
[   31.201529] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available)
Warning: Permanently added '10.128.15.240' (ECDSA) to the list of known hosts.
[   36.608063] random: sshd: uninitialized urandom read (32 bytes read, 108 bits of entropy available)
executing program
[   36.708014] kasan: CONFIG_KASAN_INLINE enabled
[   36.713388] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   36.726204] Dumping ftrace buffer:
[   36.729719]    (ftrace buffer empty)
[   36.733398] Modules linked in:
[   36.736672] CPU: 0 PID: 3324 Comm: syzkaller388245 Not tainted 4.4.107-g610c835 #12
[   36.744439] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   36.753867] task: ffff8801d1280000 task.stack: ffff8800b0d18000
[   36.759894] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   36.768136] RSP: 0018:ffff8800b0d1fab0  EFLAGS: 00010a07
[   36.773554] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   36.780800] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   36.788037] RBP: ffff8800b0d1fac0 R08: 0000000000000001 R09: 0000000000000000
[   36.795280] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   36.802518] R13: 0000000000000020 R14: ffff8801d0d30000 R15: dffffc0000000000
[   36.809753] FS:  000000000186e880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   36.817947] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   36.823802] CR2: 0000000020001000 CR3: 00000001da137000 CR4: 00000000001406f0
[   36.831050] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   36.838288] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   36.845525] Stack:
[   36.847639]  0000000000000000 ffff8801d0d30158 ffff8800b0d1fb20 ffffffff825b8cf1
[   36.855627]  ffff8801d0d30170 ffffed003a1a602b ffffed003a1a602e ffff8801d0d30168
[   36.863576]  dead4ead00000000 ffff8801d0d30140 0000000000000000 0000000000000000
[   36.871522] Call Trace:
[   36.874081]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   36.880540]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   36.886565]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   36.892685]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   36.898627]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   36.903873]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   36.909635]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   36.916268]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   36.923861]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   36.930494]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   36.935910]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   36.941854]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   36.947278]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   36.952695]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   36.958554]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   36.965274]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   36.971997]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   36.977943]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   36.983186]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   36.988343]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   36.994023]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   37.000490]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   37.007038] 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 
[   37.033356] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   37.039238]  RSP <ffff8800b0d1fab0>
[   37.043293] ---[ end trace b6fc9f5a47d23a50 ]---
[   37.048029] Kernel panic - not syncing: Fatal exception
[   37.053768] Dumping ftrace buffer:
[   37.057287]    (ftrace buffer empty)
[   37.060977] Kernel Offset: disabled
[   37.064568] Rebooting in 86400 seconds..