[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.725498] random: sshd: uninitialized urandom read (32 bytes read, 31 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. [ 21.858463] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.093359] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 22.631480] random: sshd: uninitialized urandom read (32 bytes read, 46 bits of entropy available) [ 22.820887] random: sshd: uninitialized urandom read (32 bytes read, 51 bits of entropy available) Warning: Permanently added '10.128.0.29' (ECDSA) to the list of known hosts. [ 28.415247] random: sshd: uninitialized urandom read (32 bytes read, 58 bits of entropy available) executing program [ 28.506831] BUG: unable to handle kernel paging request at ffffeafff8b88008 [ 28.514175] IP: [] page_remove_rmap+0x2e/0x260 [ 28.520441] PGD 0 [ 28.522716] Oops: 0000 [#1] PREEMPT SMP KASAN [ 28.527700] Dumping ftrace buffer: [ 28.531255] (ftrace buffer empty) [ 28.534946] Modules linked in: [ 28.538345] CPU: 1 PID: 3812 Comm: syz-executor029 Not tainted 4.4.148-gf057ff9 #81 [ 28.546147] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.555699] task: ffff8800ade4c800 task.stack: ffff8801d96b8000 [ 28.561770] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 28.570456] RSP: 0018:ffff8801d96bf9c0 EFLAGS: 00010246 [ 28.575886] RAX: dffffc0000000000 RBX: ffffeafff8b88000 RCX: 0000000000000000 [ 28.583136] RDX: 1ffffd5fff171001 RSI: ffffffff814bc75f RDI: ffffeafff8b88008 [ 28.590387] RBP: ffff8801d96bf9d0 R08: ffffffff85363fb0 R09: 0000000000000000 [ 28.597638] R10: 0000000000000001 R11: ffff8800ade4c800 R12: 0000000000000001 [ 28.604896] R13: 1ffff1003b2d7f3e R14: ffff8801ccee3800 R15: ffffeafff8b88000 [ 28.612147] FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 28.620360] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.626222] CR2: ffffeafff8b88008 CR3: 00000001ccd10000 CR4: 00000000001606f0 [ 28.633472] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.640724] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.648010] Stack: [ 28.650140] ffff8801d96bfc50 0000000000000001 ffff8801d96bfa78 ffffffff8150a1f3 [ 28.658178] 00003ffe2e2001e0 00003ffe2e2001e0 0000000041b58ab3 ffffffff841ef82f [ 28.666201] ffffffff81509ff0 00000000000004f0 ffff8801d088da50 ffff8801d96bfa40 [ 28.674237] Call Trace: [ 28.676804] [] zap_huge_pmd+0x203/0x510 [ 28.682546] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 28.689107] [] unmap_single_vma+0xea3/0x1240 [ 28.695168] [] ? vm_normal_page+0x230/0x230 [ 28.701140] [] ? __put_single_page+0x60/0x60 [ 28.707179] [] unmap_vmas+0x81/0xd0 [ 28.712437] [] exit_mmap+0x1c9/0x3a0 [ 28.717781] [] ? SyS_remap_file_pages+0x870/0x870 [ 28.724254] [] ? up_write+0x1a/0x60 [ 28.729510] [] mmput+0xf8/0x2d0 [ 28.734418] [] do_exit+0x8d8/0x26b0 [ 28.739695] [] ? file_map_prot_check+0x193/0x310 [ 28.746080] [] ? release_task.part.17+0x1200/0x1200 [ 28.752726] [] ? SyS_mprotect+0x41e/0x640 [ 28.758503] [] ? up_write+0x1a/0x60 [ 28.763759] [] ? SyS_mprotect+0x423/0x640 [ 28.769535] [] do_group_exit+0x111/0x330 [ 28.775227] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 28.781700] [] SyS_exit_group+0x1d/0x20 [ 28.787322] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 28.793875] 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 [ 28.821227] RIP [] page_remove_rmap+0x2e/0x260 [ 28.827561] RSP [ 28.831268] CR2: ffffeafff8b88008 [ 28.834722] ---[ end trace 2969970d5213ff05 ]--- [ 28.839454] Kernel panic - not syncing: Fatal exception [ 28.845140] Dumping ftrace buffer: [ 28.848682] (ftrace buffer empty) [ 28.852372] Kernel Offset: disabled [ 28.855990] Rebooting in 86400 seconds..