[....] Starting file context maintaining daemon: restorecond[?2[   16.424502] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available)
5l[?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: [   19.393779] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   19.767053] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available)
[   20.601068] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available)
[   20.785678] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available)
Warning: Permanently added '10.128.15.207' (ECDSA) to the list of known hosts.
[   26.176023] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available)
executing program
[   26.272420] kasan: CONFIG_KASAN_INLINE enabled
[   26.277482] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN
[   26.290289] Dumping ftrace buffer:
[   26.293792]    (ftrace buffer empty)
[   26.297468] Modules linked in:
[   26.300737] CPU: 0 PID: 3307 Comm: syzkaller899828 Not tainted 4.4.107-g610c835 #12
[   26.308492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   26.317809] task: ffff8801d0c10000 task.stack: ffff8801d05f8000
[   26.323828] RIP: 0010:[<ffffffff81431331>]  [<ffffffff81431331>] __free_pages+0x21/0x90
[   26.332055] RSP: 0018:ffff8801d05ffab0  EFLAGS: 00010a07
[   26.337467] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb
[   26.344702] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c
[   26.351935] RBP: ffff8801d05ffac0 R08: 0000000000000001 R09: 0000000000000000
[   26.359171] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
[   26.366404] R13: 0000000000000020 R14: ffff8801d0480000 R15: dffffc0000000000
[   26.373639] FS:  00000000016d4880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000
[   26.381830] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   26.387682] CR2: 0000000020001000 CR3: 00000001d1605000 CR4: 00000000001406f0
[   26.394921] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   26.402156] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   26.409388] Stack:
[   26.411502]  0000000000000000 ffff8801d0480158 ffff8801d05ffb20 ffffffff825b8cf1
[   26.419445]  ffff8801d0480170 ffffed003a09002b ffffed003a09002e ffff8801d0480168
[   26.427389]  dead4ead00000000 ffff8801d0480140 0000000000000000 0000000000000000
[   26.435332] Call Trace:
[   26.437891]  [<ffffffff825b8cf1>] sg_remove_scat.isra.17+0x1c1/0x2d0
[   26.444347]  [<ffffffff825b90b5>] sg_finish_rem_req+0x2b5/0x340
[   26.450369]  [<ffffffff825b9179>] sg_new_read.isra.18+0x39/0x3c0
[   26.456488]  [<ffffffff825b7472>] ? sg_get_rq_mark+0x142/0x190
[   26.462423]  [<ffffffff825bad72>] sg_read+0x8c2/0x1490
[   26.467665]  [<ffffffff8122cf91>] ? __lock_is_held+0xa1/0xf0
[   26.473425]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   26.480057]  [<ffffffff8150bdc9>] ? do_huge_pmd_anonymous_page+0x549/0xa10
[   26.487032]  [<ffffffff825ba4b0>] ? sg_proc_seq_show_debug+0xd30/0xd30
[   26.493663]  [<ffffffff8151aa73>] __vfs_read+0x103/0x440
[   26.499076]  [<ffffffff8151a970>] ? vfs_iter_write+0x2d0/0x2d0
[   26.505010]  [<ffffffff815e878d>] ? fsnotify+0x5ad/0xee0
[   26.510423]  [<ffffffff815e90c0>] ? fsnotify+0xee0/0xee0
[   26.515846]  [<ffffffff81b4d4f9>] ? avc_policy_seqno+0x9/0x20
[   26.521694]  [<ffffffff81b5ebe8>] ? selinux_file_permission+0x348/0x460
[   26.528410]  [<ffffffff81b443e9>] ? security_file_permission+0x89/0x1e0
[   26.535126]  [<ffffffff8151c600>] ? rw_verify_area+0x100/0x2f0
[   26.541062]  [<ffffffff8151c913>] vfs_read+0x123/0x3a0
[   26.546303]  [<ffffffff8151f259>] SyS_read+0xd9/0x1b0
[   26.551466]  [<ffffffff8151f180>] ? do_sendfile+0xd30/0xd30
[   26.557143]  [<ffffffff81003044>] ? lockdep_sys_exit_thunk+0x12/0x14
[   26.563601]  [<ffffffff83773d36>] entry_SYSCALL_64_fastpath+0x16/0x76
[   26.570144] 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 
[   26.596468] RIP  [<ffffffff81431331>] __free_pages+0x21/0x90
[   26.602351]  RSP <ffff8801d05ffab0>
[   26.607498] ---[ end trace ae1142d96989817f ]---
[   26.614334] Kernel panic - not syncing: Fatal exception
[   26.620103] Dumping ftrace buffer:
[   26.623624]    (ftrace buffer empty)
[   26.627309] Kernel Offset: disabled
[   26.630902] Rebooting in 86400 seconds..