[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.494623] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 27.748065] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 28.271545] random: sshd: uninitialized urandom read (32 bytes read, 41 bits of entropy available) [ 29.048988] random: sshd: uninitialized urandom read (32 bytes read, 73 bits of entropy available) [ 29.238959] random: sshd: uninitialized urandom read (32 bytes read, 77 bits of entropy available) Warning: Permanently added '10.128.10.13' (ECDSA) to the list of known hosts. [ 34.803636] random: sshd: uninitialized urandom read (32 bytes read, 84 bits of entropy available) executing program [ 34.924194] BUG: unable to handle kernel paging request at ffffeafffd340008 [ 34.931987] IP: [] page_remove_rmap+0x2e/0x260 [ 34.938435] PGD 0 [ 34.940712] Oops: 0000 [#1] PREEMPT SMP KASAN [ 34.946029] Dumping ftrace buffer: [ 34.949570] (ftrace buffer empty) [ 34.953429] Modules linked in: [ 34.956895] CPU: 0 PID: 3857 Comm: syz-executor008 Not tainted 4.4.148-gf057ff9 #81 [ 34.964914] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.974282] task: ffff8800ab80b000 task.stack: ffff8800abf60000 [ 34.980515] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 34.990177] RSP: 0018:ffff8800abf679c0 EFLAGS: 00010246 [ 34.995752] RAX: dffffc0000000000 RBX: ffffeafffd340000 RCX: 0000000000000000 [ 35.003020] RDX: 1ffffd5fffa68001 RSI: ffffffff814bc75f RDI: ffffeafffd340008 [ 35.010285] RBP: ffff8800abf679d0 R08: ffffffff85333170 R09: 0000000000000000 [ 35.017560] R10: 0000000000000001 R11: ffff8800ab80b000 R12: 0000000000000001 [ 35.024827] R13: 1ffff100157ecf3e R14: ffff8800b0554800 R15: ffffeafffd340000 [ 35.032265] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 35.040707] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.046746] CR2: ffffeafffd340008 CR3: 00000000b2987000 CR4: 00000000001606f0 [ 35.054017] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.061282] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.068552] Stack: [ 35.070692] ffff8800abf67c50 0000000000000001 ffff8800abf67a78 ffffffff8150a1f3 [ 35.078762] 00003fff4d0001e0 00003fff4d0001e0 0000000041b58ab3 ffffffff841ef82f [ 35.087444] ffffffff81509ff0 00000000000004f0 ffff8801d8c55370 ffff8800abf67a40 [ 35.096232] Call Trace: [ 35.098814] [] zap_huge_pmd+0x203/0x510 [ 35.104430] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 35.111001] [] unmap_single_vma+0xea3/0x1240 [ 35.117054] [] ? vm_normal_page+0x230/0x230 [ 35.123018] [] ? __put_single_page+0x60/0x60 [ 35.129227] [] unmap_vmas+0x81/0xd0 [ 35.134522] [] exit_mmap+0x1c9/0x3a0 [ 35.139883] [] ? SyS_remap_file_pages+0x870/0x870 [ 35.146524] [] ? up_write+0x1a/0x60 [ 35.151945] [] mmput+0xf8/0x2d0 [ 35.157032] [] do_exit+0x8d8/0x26b0 [ 35.162313] [] ? file_map_prot_check+0x193/0x310 [ 35.168720] [] ? release_task.part.17+0x1200/0x1200 [ 35.175390] [] ? SyS_mprotect+0x41e/0x640 [ 35.181186] [] ? up_write+0x1a/0x60 [ 35.186462] [] ? SyS_mprotect+0x423/0x640 [ 35.192466] [] do_group_exit+0x111/0x330 [ 35.198328] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 35.204827] [] SyS_exit_group+0x1d/0x20 [ 35.210452] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 35.217050] Code: e5 41 54 53 48 89 fb e8 e1 77 e9 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 de 01 00 00 43 08 01 0f 84 4e 01 00 00 e8 b3 77 e9 ff f0 83 43 18 ff 78 [ 35.247286] RIP [] page_remove_rmap+0x2e/0x260 [ 35.253650] RSP [ 35.257263] CR2: ffffeafffd340008 [ 35.260706] ---[ end trace 22a5636f6ab39c0e ]--- [ 35.265604] Kernel panic - not syncing: Fatal exception [ 35.271671] Dumping ftrace buffer: [ 35.275408] (ftrace buffer empty) [ 35.279110] Kernel Offset: disabled [ 35.282731] Rebooting in 86400 seconds..