[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.040500] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. [ 22.065470] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.361874] random: sshd: uninitialized urandom read (32 bytes read, 34 bits of entropy available) [ 23.107241] random: sshd: uninitialized urandom read (32 bytes read, 72 bits of entropy available) [ 23.272868] random: sshd: uninitialized urandom read (32 bytes read, 75 bits of entropy available) Warning: Permanently added '10.128.10.61' (ECDSA) to the list of known hosts. [ 29.397810] random: sshd: uninitialized urandom read (32 bytes read, 81 bits of entropy available) executing program [ 29.488017] BUG: unable to handle kernel paging request at ffffeafff8db8008 [ 29.495389] IP: [] page_remove_rmap+0x2e/0x260 [ 29.501679] PGD 0 [ 29.503927] Oops: 0000 [#1] PREEMPT SMP KASAN [ 29.508898] Dumping ftrace buffer: [ 29.512409] (ftrace buffer empty) [ 29.516094] Modules linked in: [ 29.519377] CPU: 0 PID: 3789 Comm: syz-executor715 Not tainted 4.4.150-g5541782 #83 [ 29.527150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.536491] task: ffff8800af1e9800 task.stack: ffff8800bb030000 [ 29.542521] RIP: 0010:[] [] page_remove_rmap+0x2e/0x260 [ 29.551208] RSP: 0018:ffff8800bb0379c0 EFLAGS: 00010246 [ 29.556634] RAX: dffffc0000000000 RBX: ffffeafff8db8000 RCX: 0000000000000000 [ 29.563881] RDX: 1ffffd5fff1b7001 RSI: ffffffff814bceaf RDI: ffffeafff8db8008 [ 29.571134] RBP: ffff8800bb0379d0 R08: ffffffff85363fb0 R09: 0000000000000000 [ 29.578381] R10: 0000000000000001 R11: ffff8800af1e9800 R12: 0000000000000001 [ 29.585641] R13: 1ffff10017606f3e R14: ffff8801ca646800 R15: ffffeafff8db8000 [ 29.592887] FS: 0000000000000000(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 29.601087] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.606953] CR2: ffffeafff8db8008 CR3: 00000001ca6d2000 CR4: 00000000001606f0 [ 29.614198] Stack: [ 29.616320] ffff8800bb037c50 0000000000000001 ffff8800bb037a78 ffffffff8150ad13 [ 29.624332] 00003ffe36e001e0 00003ffe36e001e0 0000000041b58ab3 ffffffff841ef837 [ 29.632323] ffffffff8150ab10 00000000000004f0 ffff8800afe72d10 ffff8800bb037a40 [ 29.640338] Call Trace: [ 29.642908] [] zap_huge_pmd+0x203/0x510 [ 29.648536] [] ? __pmd_trans_huge_lock+0x320/0x320 [ 29.655118] [] unmap_single_vma+0xea3/0x1240 [ 29.661156] [] ? vm_normal_page+0x280/0x280 [ 29.667105] [] ? __put_single_page+0x60/0x60 [ 29.673145] [] unmap_vmas+0x81/0xd0 [ 29.678399] [] exit_mmap+0x1c9/0x3a0 [ 29.683738] [] ? SyS_remap_file_pages+0x870/0x870 [ 29.690227] [] ? up_write+0x1a/0x60 [ 29.695527] [] mmput+0xf8/0x2d0 [ 29.700458] [] do_exit+0x8d8/0x26b0 [ 29.705713] [] ? file_map_prot_check+0x193/0x310 [ 29.712097] [] ? release_task.part.17+0x1200/0x1200 [ 29.718739] [] ? SyS_mprotect+0x41e/0x640 [ 29.724514] [] ? up_write+0x1a/0x60 [ 29.729764] [] ? SyS_mprotect+0x423/0x640 [ 29.735534] [] do_group_exit+0x111/0x330 [ 29.741218] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 29.747685] [] SyS_exit_group+0x1d/0x20 [ 29.753304] [] entry_SYSCALL_64_fastpath+0x22/0x9e [ 29.759855] Code: e5 41 54 53 48 89 fb e8 31 76 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 03 76 e9 ff f0 83 43 18 ff 78 [ 29.786976] RIP [] page_remove_rmap+0x2e/0x260 [ 29.793301] RSP [ 29.796916] CR2: ffffeafff8db8008 [ 29.800343] ---[ end trace 256e65f87ad71dd7 ]--- [ 29.805073] Kernel panic - not syncing: Fatal exception [ 29.810707] Dumping ftrace buffer: [ 29.814229] (ftrace buffer empty) [ 29.817916] Kernel Offset: disabled [ 29.821524] Rebooting in 86400 seconds..